Huawei Technologies EGW1520A eSpace EGW1520 User Manual UserManual Part3

Download:
Mirror Download [FCC.gov]
Document ID	1894873
Application ID	VsPthI0MrD2lNmupVgUsfw==
Document Description	UserManual_Part3.pdf
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	319.19kB (3989865 bits)
Date Submitted	2013-02-06 00:00:00
Date Available	2013-08-05 00:00:00
Creation Date	2013-02-01 11:08:15
Producing Software	Microsoft® Office Word 2007
Document Lastmod	2013-02-01 07:05:03
Document Title	UserManual_Part3.pdf
Document Creator	Microsoft® Office Word 2007
Document Author:	Huawei Technologies Co.,Ltd.

eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
7 Feature Description and Implementation
Description

IPv4: Internet Protocol version 4, which is the first widely
used protocol version and is at the core of standards-based
Internet technology.

AppleTalk: A proprietary suite of protocols developed by
Apple Inc. to provide communication services for Apple
computers, such as file transfer, printing, email, and other
network services.

IPX: Internet Packet Exchange (IPX) protocol stack, which is
supported by Novell's NetWare operating system.

NetBEUI: Network Basic Input/Output System (NetBIOS)
Extended User Interface, which is a non-routable protocol
developed for the IBM to transfer NetBIOS messages.

IGMP: Internet Group Management Protocol, which is used by
hosts and neighboring routers on IP networks to establish
multicast group memberships.
Destination MAC
Address
Indicates the destination MAC address. For example, value
00:01:6C:4C:58:FE indicates that the ADSL port filters data
frames whose destination MAC addresses are
00:01:6C:4C:58:FE. If this parameter is left blank, the ADSL port
filters the destination MAC addresses for all data frames.
Source MAC Address
Indicates the source MAC address. For example, value
90:FB:A6:14:9E:5A indicates that the ADSL port filters data
frames whose source MAC addresses are 90:FB:A6:14:9E:5A. If
this parameter is left blank, the ADSL port filters the source MAC
addresses for all data frames.
Frame Direction
Indicates the direction in which a data frame is transmitted. The
options are as follows:
5.
Click

LAN<=>WAN: The ADSL port filters the MAC addresses for
data frames that are transmitted mutually between the LAN
and WAN ports.

WAN=>LAN: The ADSL port filters the MAC addresses for
data frames that are transmitted from the WAN ports to the
LAN ports.

LAN=>WAN: The ADSL port filters the MAC addresses for
data frames that are transmitted from the LAN ports to the
WAN ports.
to save the settings.
Figure 7-260 shows the configuration result.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
349
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-260 Configuration result
Value BOTH indicates that the ADSL port filters the MAC addresses for data frames
that are transmitted from the LAN port to the WAN port and from the WAN port to the
LAN port.
----End
7.6.5 URL Filter
Using the URL filtering feature, an enterprise or a family can prevent its members from
visiting certain websites.
Description
Principle
At present, contents at many websites are illegal or improper because they are not effectively
supervised or restricted. Therefore, more and more enterprises use the URL access control
function to ensure information security and restrict URL access.
As shown in Figure 7-261, URL filtering is used to:

Control access to websites containing content including pornography, terrorism, violence,
gambling, or illegal information.

Shield phishing websites to protect employees' privacy.

Shield malicious websites to protect the enterprise's private network from attack.

Provide customized services for enterprises, for example, allow employees to access
specified websites.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
350
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-261 URL filtering
Implementation
The EGW1520 provides the following URL filter modes:

Include
URLs in the whitelist can be accessed.

Exclude
URLs in the blacklist cannot be accessed.
Use either whitelist or blacklist mode.
EGW1520 can filter the whole URL (for example, http://www.example.com) or the keyword
in the URL (for example, example.com).
Specification

Maximum number of URLs to be filtered at the same time: 100

Maximum length of each URL: 128 bytes

Full match and partial match
Limitation
Wildcards, for example, using * for full match, are not allowed in filtering rules.
Configuration
Prerequisite
You have logged in to the web management system. For details, see 7.7.1 Web Management.
Procedure
Step 1 On the web management system, choose Network > Security from the navigation tree.
Step 2 Click the Filter URL tab.
The page shown in Figure 7-262 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
351
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-262 Configuring the URL filter (1)
Step 3 Select a URL filter mode, for example, Exclude.

Include
URLs in the whitelist can be accessed.

Exclude
URLs in the blacklist cannot be accessed.
Step 4 Click
to save the filter mode.
The page shown in Figure 7-263 is displayed.
Figure 7-263 Configuring the URL filter (2)
Step 5 Click
to add a URL to be filtered.
The page shown in Figure 7-264 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
352
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-264 Configuring the URL filter (3)
Step 6 Enter the URL to be filtered (a compete URL or keywords) and the port number. The default
port number is 80.
Step 7 Click
to save the settings.
Figure 7-265 shows the configuration result.
Figure 7-265 Configuring the URL filter (4)
----End
7.6.6 Virtual Server
After configuring the virtual server, users can access to servers in the private network, and
enable services, such as web browsing and FTP download.
Description
A virtual server functions as a public server in the private network. Users in the external
network can use services that the virtual server provides (such as web and FTP download
services) after accessing the external address obtained from the EGW1520. Figure 7-266
shows the typical network.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
353
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-266 Typical virtual server network
Configuration
Prerequisites

You have logged in to the web management system. For details, see 7.7.1 Web
Management.

The EGW1520 has been connected to the upstream network and the NAT function has
been enabled.

Required services and port numbers have been enabled on the private network.
Procedure
Step 1 On the web management system, choose Network > Security from the navigation tree.
Step 2 Click the Virtual Server tab.
The page shown in Figure 7-267 is displayed.
Figure 7-267 Configuring a virtual server (1)
Step 3 Click
to add a virtual server.
The page shown in Figure 7-268 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
354
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-268 Configuring a virtual server (2)
Step 4 Set parameters according to Table 7-68.
Table 7-68 Parameter description
Parameter
Description
Select a Service
Indicates the service that is provided by the virtual server, such as
the web, mail, and FTP services. The service must be enabled on
the internal server(Multiple services can be enabled on a server in
the internal network).
Custom Service
Allows you to define a service different from options in the Select
a Service drop-down list box. The service that you define must be
enabled on the internal server.
Virtual Server IP
Address
Indicates the IP address of the internal server, for example,
192.168.1.5.
External Port Start
Indicates the start and end port numbers that the virtual server
provides for external users. External users can use the port
numbers between the start and end port numbers to access the
virtual server. You are advised to use the default value.
External Port End
Protocol
Indicates the transfer protocol used by the virtual server, for
example, TCP for the web server.
Type
Indicates the port count used by the internal server.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
355
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Parameter
Description
Internal Port Start
Single: The internal server uses only one port.

Range: The internal server uses multiple ports. Port numbers
on the internal server must be the same as those provided by
the virtual server for external access, and you cannot change
them.
Indicates the start and end port numbers that the internal server
provides for external users, which must be the same as the start
and end port numbers that the virtual server provides for external
users.
Internal Port End
Step 5 Click

to save the settings.
Figure 7-269 shows the configuration result.
Figure 7-269 Configuring a virtual server (3)
After the configuration is successful, external users can access the internal server through the
EGW1520 WAN port or the ADSL IP address and port number.
----End
Typical Configuration Example
Network Requirements
Users access the Internet through EGW1520 and want to configure a web server and an FTP
server on the private network to provide web and FTP download services for external users.
The network requirements are as follows:

Connect EGW1520 to the Internet through the WAN port whose IP address is 11.11.11.1.

Configure a web server and an FTP server on the private network, whose IP addresses
are 192.168.1.8 and 192.168.1.5 respectively.

After the configuration is complete, external systems can access the internal web server
and FTP server.
Typical Network
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
356
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-270 shows the typical network diagram of the virtual server.
Figure 7-270 Typical network
Procedure
1.

For details on how to configure the web and FTP servers, see the relevant documents.

For details on how to add a virtual server, see Adding a virtual server.
Configure the web server software on the server whose IP address is 192.168.1.8 and
enable the port number 80. Configure the FTP server software on the server whose IP
address is 192.168.1.5 and enable the port number 21.
For details, see the related user guide.
2.
On the web management system, add a virtual server.
Figure 7-271 shows the configuration result.
Figure 7-271 Configuration result
Verification

If an external user enters http://11.11.11.1 in the address box of the Internet Explorer and
accesses the web server successfully, the web server is configured successfully.
Otherwise, verify the configurations of the web server software and the EGW1520
virtual server.

If an external user enters ftp://11.11.11.1 in the address box of the Internet Explorer and
accesses the FTP server successfully, the FTP server is configured successfully.
Otherwise, verify the configurations of the FTP server software and the EGW1520
virtual server.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
357
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
An external user must use the IP address that EGW1520 provides for external users (WAN
port IP address 11.11.11.1 in this example) to access the internal server.
7.6.7 DMZ
A virtual server enables external users to access internal servers on the private network. When
multiple services are running on internal servers, several virtual servers must be configured.
This makes the configuration complicated. To simplify the configuration, configure only the
IP addresses for internal servers in the Demilitarized Zone (DMZ). External users can access
only the internal servers (such as the WWW and FTP servers) in the DMZ but cannot use the
other internal resources. This protects the internal network against illegal access.
Description
The DMZ is deployed between a public network and an enterprise's private network. Some
public servers (such as the web server and FTP server) are deployed in the DMZ, as shown in
Figure 7-272. The EGW1520 forwards all access requests from the public network (excluding
those meeting NAT requirements) to the DMZ. This protects the internal network.
Figure 7-272 DMZ implementation
The following uses a web server in the DMZ as an example to describe the DMZ
implementation.
1.
After receiving external HTTP packets, the EGW1520 checks the packets. If the packets
do not meet NAT requirement, EGW1520 forwards the packets to the DMZ.
2.
EGW1520 converts the destination address of request packets to the DMZ web server's
preset IP address, and sends the packets to the DMZ web server.
3.
After receiving the request packets, the web server sends response packets to the
computer on the public network. Then NAT is performed.
Configuration
Prerequisites
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
358
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation

You have logged in to the web management system. For details, see 7.7.1 Web
Management.

You have connected to the upstream network and the NAT function has been enabled.
For details on how to connect to the upstream network, see 7.2 Connection Modes.
Procedure
Step 1 On the web management system, choose Network > Security from the navigation tree.
Step 2 Click the DMZ Host tab.
The page shown in Figure 7-273 is displayed.
Figure 7-273 Configuring the DMZ (1)
Step 3 Enter the DMZ host IP address, for example, 192.168.1.5.
Step 4 Click
to save the settings.
Figure 7-274 shows the configuration result.
Figure 7-274 Configuring the DMZ (2)
----End
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
359
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Typical Example
Networking Requirements
Assume that a user who uses the EGW1520 to connect to the Internet wants to deploy a web
server and an FTP server on the intranet to provide website services and FTP resource
download services for users on the external network. The network requirements are as
follows:

The EGW1520 uses a WAN port to connect to the Internet. The IP address of the WAN
port is 11.11.11.1.

Deploy a web server and an FTP server on the same computer on the EGW1520's
intranet. The IP address is 192.168.1.5.

Configure the DMZ to enable users on the external network to access the web server and
FTP server.
Typical Network
Figure 7-275 shows the typical network.
Figure 7-275 DMZ typical network
Configuration Procedure
1.

For details on how to configure the web and FTP servers, see the relevant documents.

For details on how to configure the DMZ, see Configuration.
On the computer whose IP address is 192.168.1.5, configure the web server and the FTP
server.
For details, see the related user guide.
2.
Configure the DMZ on the web management system.
Figure 7-276 shows the configuration result.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
360
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-276 Configuration result
Verification

Start the Internet Explorer and enter http://11.11.11.1 in the address box as a user on the
external network. If the web server is connected, the configuration is successful. If the
web server is not connected, check the IP address setting of the DMZ host on the web
server and EGW1520.

Start the Internet Explorer and enter ftp://11.11.11.1 in the address box as a user on the
external network. If the FTP server is connected, the configuration is successful. If the
FTP server is not connected, check the IP address setting of the DMZ host on the FTP
server and EGW1520.
An external user must use EGW1520 external IP address (in this topic, it is the IP address of
the WAN port 11.11.11.1) to access internal servers.
7.6.8 Remote Login
This topic describes how to remotely configure and maintain the EGW1520 by connecting to
uplink ports (WAN, ADSL, or 3G port).
The EGW1520 provides a public IP address for remote maintenance.
Enabling Remote Login
Step 1 On the web management system, choose Network > Security from the navigation tree.
Step 2 Click the Remote login tab.
The page shown in Figure 7-277 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
361
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-277 Configuring remote login
Step 3 Select Enable.
Step 4 Click
to save the settings.
----End
Obtaining the Public IP Address of EGW1520
Step 1 On the web management system, choose Management > Status from the navigation tree.
Step 2 Click the Network tab.
The page shown in Figure 7-278 is displayed.
Figure 7-278 Obtaining the IP address of EGW1520
Step 3 View the IP address of EGW1520. The IP address in Figure 7-278 is the public IP address of
EGW1520.
----End
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
362
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Logging In to EGW1520 Remotely
Step 1 Use the Internet Explorer (6.0 or a later version) on your computer to access the public IP
address of EGW1520.
When you log in to the EGW1520 using HTTP, the EGW1520 automatically changes your login mode
to HTTPS to ensure communication security.
If the security level of your browser is not set properly, the system notifies you that the
certificate is incorrect, as shown in Figure 7-279.
Figure 7-279 Prompt information
Click
to continue your operation.
The page shown in Figure 7-280 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
363
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-280 Logging in to the EGW1520
Step 2 Enter the user name (initial user name is admin) and password (initial password is
Admin@123) and click
----End
7.7 Operations and Maintenance
The EGW1520 can be managed on web pages or in TR-069 mode.
7.7.1 Web Management
The web management system allows users to set parameters, detect faults, and upgrade
devices.
The EGW1520 also supports remote login, from which you can remotely configure and maintain the
EGW1520. For details about how to remotely log in to the EGW1520, see 7.6.8 Remote Login.
Prerequisite
Before logging in to the web management system, ensure that the configuration environment
is ready.
1.
Prepare a PC (maintenance terminal).
The PC must meet the following requirements:
Issue 01 (2012-05-15)
−
Has the Ethernet adapter installed, supporting TCP/IP.
−
Has Windows XP or later operating system installed.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
364
eSpace EGW1520 Enterprise Gateway
Product Documentation
2.
7 Feature Description and Implementation
−
Has Microsoft Internet Explorer 6.0 or later version without configuring the proxy
server.
−
Supports the resolution 1024 x 768 or above.
The console cables have been connected.
You can connect cables by using either of the following methods according to the
network:
3.
−
Use the straight-through cable to connect the EGW1520 LAN port to the PC network
port.
−
Use the straight-through cable to connect the EGW1520 LAN port to the PC network
port through the switch or hub.
The PC IP address has been set.
The IP addresses of the PC and EGW1520 must be on the same network segment. For
example, if IP address of the EGW1520 is 192.168.1.1 (default value), the PC IP address
can be set to 192.168.1.x, where x ranges from 2 to 254.
By default, DHCP is enabled on an EGW1520. The PC can use the automatic mode to obtain
the IP address.
Background
Users can access the web management system in the following two modes:

HTTPS
The web browser interacts with the EGW1520 using HTTPS, which ensures user
information security.

HTTP
The web browser interacts with the EGW1520 using HTTP.

Only HTTPS access mode is enabled on EGW1520 by default. The HTTP access mode can be
enabled on the page for configuring the LAN. For details, see Configuring the LAN.

HTTP transmits plain text. Use HTTP to perform web management only in trusted networks.

If only the HTTPS mode is enabled, the system switches to the HTTPS mode automatically when
you access the EGW1520 in HTTP mode.
Procedure
Step 1 Log in to the EGW1520 using Internet Explorer 6.0 or later. The default URL is
https://192.168.1.1.
The page shown in Figure 7-281 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
365
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-281 Logging in to the web management system (1)

The default IP address of the EGW1520, login user name, and password can be obtained from the
label at the bottom of the EGW1520.

After logging in to the web management system, you can change IP address of the EGW1520. For
details, see Configuring the LAN.
Step 2 Enter the user name and password, and click Log In.

Administrator: The user name is admin and the password is Admin@123.

Common user: Both the initial user name and password are the internal number of a
common user.

Choose Management > Password to change the password after the initial login.

Make a note of your password and keep it in a safe place. Do not share your password
with anyone. If you forget your password, press and hold the RESET button on EGW1520
for more than six seconds, and log in to the web management system using the default
password Admin@123. The configuration is restored to factory settings.

If you fail to log in to the web management system for 5 consecutive times in 10 minutes,
the system locks your PC IP address for 30 minutes.

If you do not perform any operation in 10 minutes after logging in to the web management
system, the login times out and the system requires re-login to ensure security.
----End
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
366
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
7.7.2 TR-069
The Technical Report 069 (TR-069) is a DSL forum (which was later renamed as broadband
forum) technical specification entitled CPE WAN Management Protocol (CWMP). It defines
an application layer protocol for remote management of end-user devices.
Description
This topic describes the principle, implementation, specification, and limitation of the
TR-069.
Principle
The Technical Report 069 (TR-069) is a DSL forum (which was later renamed as broadband
forum) technical specification entitled CPE WAN Management Protocol (CWMP). It defines
an application layer protocol for remote management of end-user devices. As a bidirectional
SOAP/HTTP-based protocol, it provides the communication between customer premises
equipment (CPE) and Auto Configuration Servers (ACS). It includes both a safe auto
configuration and the control of other CPE management functions within an integrated
framework.
Customer premises equipment, such as gateways and set top boxes (STBs) are scattered on
the user side. Maintenance personnel need to provide on-site services when configuration
modification or troubleshooting is required, which increases management difficulty. TR-069
enables you to manage and maintain user's devices remotely on the network side. Details
about the functions that TR-069 provides are as follows:

Configuration management
Installs CPE without configurations and modifies parameter settings remotely.

Version management
Manages CPE software and firmware, for example, download the software version, and
back up and restore the configuration file.

Remote monitoring
Monitors the CPE status and performance, and queries the CPE status.

GUI-based management
Manages NEs on the EMS in GUI mode.

Alarm management
Reports alarms to the EMS and instructs the EMS to delete an alarm in time once the
alarm is cleared.
Implementation
As a CPE, EGW1520 supports TR-069, Figure 7-282 shows TR-069 network.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
367
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-282 TR-069 network diagram
ACS
Auto-Configuration Server
BRAS
Broadband Remote Access Server
DSLAM
Digital Subscriber Line Access Multiplexer
CPE
Customer Premises Equipment
EGW1520 uses the ADSL port or WAN port to connect to ACS. The preceding figure uses the
ADSL port as an example.
Specification

TR-069

TR-098

TR-104
Limitation
N/A
Setting TR-069 Parameters on the ACS
This topic describes how to set TR-069 parameters on the ACS.
TR-069 Connection Parameters
For details about configurations on the ACS, see the related ACS configuration guide. This
topic only lists TR-069 parameters for the ACS to connect to EGW1520, as shown in Table
7-69.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
368
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Table 7-69 TR-069 connection parameters
Parameter
Description
ACS URL
Indicates the ACS URL. For example, http://www.acs.com.
ACS User Name
Indicates the user name for the ACS to authenticate the
TR-069 client, which must be the same as the user name on
the ACS.
ACS Password
Indicates the password for the ACS to authenticate the
TR-069 client, which must be the same as the user name on
the ACS.
Connection Request User
Name
Indicates the user name for the TR-069 client to authenticate
the ACS, which must be the same as the user name on the
TR-069 client.
Connection Request
Password
Indicates the password for the TR-069 client to authenticate
the ACS, which must be the same as the user name on the
TR-069 client.
Connection Request URL
Indicates the URL of the TR-069 client. For example,
http://192.168.1.1:8081/CPE. 192.168.1.1 is the IP address of
the EGW1520 local area network (LAN) gateway.
Setting TR-069 Parameters on the CPE
This topic describes how to set TR-069 parameters on the EGW1520.
Prerequisites
You have logged in to the web management system. For details, see 7.7.1 Web Management.
Procedure
Step 1 On the web management system, choose Management > TR-069 Client from the navigation
tree.
The page shown in Figure 7-283 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
369
eSpace EGW1520 Enterprise Gateway
Product Documentation
7 Feature Description and Implementation
Figure 7-283 TR-069 client configuration
Step 2 Set parameters according to Table 7-70.
Table 7-70 Parameter description
Parameter
Description
Manufacturer
Indicates the device manufacturer.
Manufacturer OUI
Indicates the organizationally Unique Identifier (OUI)
of the manufacturer.
Product Class
Indicates the device model.
Device SN
Indicates the device sequence number.
WAN Interface Used by TR-069
Client
Indicates the WAN port on the TR-069 client
connected to the ACS.
ACS URL
Indicates the ACS URL. For example,
http://www.acs.com.
ACS User Name
Indicates the user name for the ACS to authenticate the
TR-069 client, which must be the same as the user
name on the ACS.
ACS Password
Indicates the password for the ACS to authenticate the
TR-069 client, which must be the same as the user
name on the ACS.
Connection Request URL
Indicates the URL of the TR-069 client.
Connection Request User Name
Indicates the user name for the TR-069 client to
authenticate the ACS, which must be the same as the
user name on the TR-069 client.
Connection Request Password
Indicates the password for the TR-069 client to
authenticate the ACS, which must be the same as the
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
370
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
7 Feature Description and Implementation
Description
user name on the TR-069 client.
Manual Trigger
Initiates the session to the ACS manually by clicking
Trigger.
Inform
Indicates whether to initiate a session to the ACS
periodically.
Inform Interval(Sec)
Indicates the interval to initiate a session to the ACS, in
seconds. The default value is 1800.
Step 3 Click
to save the settings.
----End
Result
After the EGW1520 is connected to the ACS by using TR-069, use ACS to configure and
manage the EGW1520. TR-069 parameters reference lists parameters in the TR-069 data
model.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
371
eSpace EGW1520 Enterprise Gateway
Product Documentation
8 Diagnosis Mode
Diagnosis Mode
About This Chapter
This topic describes diagnosis modes for the EGW1520.
8.1
Enabling the Debug Log
This topic describes how to enable the debug log for each process. The system can generate
the debug logs for different processes.
8.2
Configuring Traffic Mirroring
This section describes how to configure traffic mirroring to capture packets. Traffic mirroring
allows you to use a packet capture tool on the mirroring port to obtain information about
packets entering or leaving the monitored port.
8.3
Downloading Black Box Files
This topic describes how to download black box files.
8.4
Pinging IP Addresses
This topic describes how to ping an IP address. Using the ping function, you can ping the peer
device of the EGW1520 to check the connection between them.
8.1 Enabling the Debug Log
This topic describes how to enable the debug log for each process. The system can generate
the debug logs for different processes.
Large amounts of logs are generated during the EGW1520 running process.
By default, the system does not generate the debug logs. To generate the debug logs, enable
the debug log and log generation function, set the log level to debug, and configure the log
saving mode. For details, see 9.4 Managing System Logs.
Procedure
Step 1 On the web management system, choose Diagnose > Debug Logs from the navigation tree.
The page shown in Figure 8-1 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
372
eSpace EGW1520 Enterprise Gateway
Product Documentation
8 Diagnosis Mode
Figure 8-1 Enabling the debug logs for each module
Step 2 Enable the debug logs for modules according to Table 8-1.
Table 8-1 Parameter description
Parameter
Description
Output
debug-level
log in start-up
process
Debug logs are generated when the system starts. For example, when you
want to debug the system during system startup, enable this function.
Voice services
Debug logs for voice services are generated. For example, when the
synchronization server cannot synchronize service data, enable this
function.
Network
services
Debug logs for network services are generated. For example, when you
want to view the IP address obtained by EGW1520 that functions as a
client, enable this function.
System
management
Debug logs for system management are generated. For example, when
you want to view message sending and receiving information in the
system, enable this function.
Configuration
management
Debug logs for configuration management are generated. For example,
when you want to monitor network time synchronization, enable this
function.
Step 3 Click
to save the settings.
----End
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
373
eSpace EGW1520 Enterprise Gateway
Product Documentation
8 Diagnosis Mode
8.2 Configuring Traffic Mirroring
This section describes how to configure traffic mirroring to capture packets. Traffic mirroring
allows you to use a packet capture tool on the mirroring port to obtain information about
packets entering or leaving the monitored port.
Procedure
Step 1 On the web management system, choose Diagnose > Packet Mirroring from the navigation
tree.
The page shown in Figure 8-2 is displayed.
Figure 8-2 Traffic mirroring
Step 2 Set parameters according to Table 8-2.
Table 8-2 Parameters
Item
Description
Monitored
port
Port that the mirroring port monitors.
Direction
Direction in which packets are monitored:
Mirroring port
Issue 01 (2012-05-15)

IN: Only the packets that the EGW1520 receives on the monitored
port are monitored.

OUT: Only the packets that the EGW1520 sends from the monitored
port are monitored.

BOTH: The packets that the monitored port receives and sends out are
monitored.
Port that captures packets from the monitored port. As shown in Figure
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
374
eSpace EGW1520 Enterprise Gateway
Product Documentation
Item
8 Diagnosis Mode
Description
8-2, interface LAN3 captures the incoming and outgoing packets on
interface LAN1.
NOTE
Manage the captured packets carefully.
Step 3 Click
to save the settings.
----End
8.3 Downloading Black Box Files
This topic describes how to download black box files.
Critical or minor defects that occur during the EGW1520 running process are recorded in
black box files. You can view black box files to analyze system exceptions.
Procedure
Step 1 On the web management system, choose Diagnose > Black Box from the navigation tree.
The page shown in Figure 8-3 is displayed.
Figure 8-3 Downloading black box files
Step 2 Select a black box file to download.
Step 3 Click
prompted.
Issue 01 (2012-05-15)
to save the file to the local host or other hosts on the network as
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
375
eSpace EGW1520 Enterprise Gateway
Product Documentation
To delete a black box file, select the file and click
8 Diagnosis Mode
----End
8.4 Pinging IP Addresses
This topic describes how to ping an IP address. Using the ping function, you can ping the peer
device of the EGW1520 to check the connection between them.
Procedure
Step 1 On the web management system, choose Diagnose > Ping Diagnose from the navigation tree.
The page shown in Figure 8-4 is displayed.
Figure 8-4 IPPing Diagnose page
Step 2 Select Bind Interface.
Step 3 Set parameters according to Table 8-3.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
376
eSpace EGW1520 Enterprise Gateway
Product Documentation
8 Diagnosis Mode
Table 8-3 Parameter settings
Parameter
Description
IP/Domain
The IP address that will be pinged.
Packet Length
Size of packets that are sent during the ping operation. The packet size
ranges from 20 bytes to 1500 bytes.
Step 4 Click
The page shown in Figure 8-5 is displayed.
Figure 8-5 Diagnosis result
----End
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
377
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
System Management
About This Chapter
This topic describes how to manage and maintain the EGW1520 in different modes.
9.1
Configuring the System Time
This topic describes how to configure the system time manually and how to synchronize the
NTP server time.
9.2
Managing the Configuration File
This topic describes how to back up and load the configuration file.
9.3
Restoring Factory Settings
This topic describes how to restore factory settings.
9.4
Managing System Logs
This topic describes how to manage system logs.
9.5
Viewing Alarms
This topic describes how to view alarms. You can analyze the exceptions occur during system
running according to the alarms.
9.6
Viewing Security Logs
This topic describes how to view security logs to query the recent operations.
9.7
Viewing Electronic Labels
You can learn about the device information based on its electronic label.
9.8
Downloading Call Records
This topic describes how to back up call records on the local computer.
9.9
One-Click Download
This topic describes how to use the one-click download function to collect system information.
If the system is faulty, you can download system information and send it to the maintenance
personnel for fault location.
9.10
Issue 01 (2012-05-15)
Changing the Password
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
378
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
This topic describes how to change the password for logging in to the EGW1520.
9.11 Upgrading Host Software
This topic describes how to upgrade host software.
9.12 Uploading Voice Files
This topic describes how to upload voice files.
9.13
Restarting the EGW1520
This topic describes how to restart the EGW1520.
9.1 Configuring the System Time
This topic describes how to configure the system time manually and how to synchronize the
NTP server time.
The EGW1520 requires correct time to report alarms, trace malicious calls, and generate logs.
The EGW1520 allows you to configure the system time in either of the following modes:


Configure time manually on the local computer. For details, see Configuring Local Time.
−
Sets system time on the web management system.
−
Supports setting time zones and daylight saving time (DST).
Synchronize time automatically by using the NTP server. For details, see Configuring
NTP Time.
NTP functions at the application layer. Based on the IP and the User Datagram Format
(UDP), the NTP is used to synchronize the time between distributed time servers and
clients. As the EGW1520 supports the NTP protocol, it can function as an NTP client to
synchronize time with the NTP server.
Configuring Local Time
Step 1 On the web management system, choose Management > Date & Time from the navigation
tree.
The page shown in Figure 9-1 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
379
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Figure 9-1 Date & Time tab page (1)
Step 2 Set EGW1520 Time as required.
Step 3 Click
to save the settings.
When the EGW1520 restarts, the system time that you configure is restored to the default
setting (such as 1970-01-01 00:00:00).
Step 4 (Optional) Configure the time zone.
1.
Set parameters according to Table 9-1.
Table 9-1 Parameter description (1)
Parameter
Description
Time zone Offset
Set the time zone.

GMT+: east of GMT

GMT-: west of GMT
For example, set this parameter to GMT+ and 08:00 (GMT+8 time
zone).
2.
Click
to save the settings.
Step 5 (Optional) Configure the DST.
1.
Click Daylight Saving Time.
The page shown in Figure 9-2 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
380
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Figure 9-2 Configuring the DST
2.
Set parameters according to Table 9-2.
Table 9-2 Parameter description (2)
Parameter
Description
Start By
Start type of the DST.
End By

Date: The start time is a date.

Day: The start time is a day in a week.
End type of the DST.

Date: The end time is a date.

Day: The end time is a day in a week.
Start Time
DST start time.
End Time
DST end time.
Start Week
Week counting from the start time. This parameter is valid when
Type is set to Start Day.
End Week
Week counting from the end time. This parameter is valid when
Type is set to End Day.
Start Weekday
Day in a week counting from the start time. This parameter is valid
when Type is set to Start Day.
End Weekday
Day in a week counting backward from the end time. This
parameter is valid when Type is set to End Day.
Time Offset (min)
DST offset. If the DST function is enabled, the system time is the
original time plus the offset within the validity period of the DST.
3.
Issue 01 (2012-05-15)
Click
to save the settings.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
381
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
----End
Configuring NTP Time
Step 1 On the web management system, choose Management > Date & Time from the navigation
tree.
Step 2 Click the NTP Server tab.
Step 3 Click Network Time Synchronization Service.
The page shown in Figure 9-3 is displayed.
Figure 9-3 Configuring the NTP server
Step 4 Set parameters according to Table 9-3.
Table 9-3 Parameter description (3)
Parameter
Description
Main NTP Server
IP address or domain name of the active NTP server.
Sub NTP Server
IP address or domain name of the standby NTP server.
Synchronization Interval
Period of synchronizing the NTP server time.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
382
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Parameter
Description
(s)
Synchronization Status
Status of NTP server time synchronization.
Encryption Type
The value is the same as that of the NTP server.
Authentication Key ID
The value is the same as that of the NTP server.
Password
The value is the same as that of the NTP server.
Step 5 Click
to save the settings.
Check whether the NTP server time is the same as the EGW1520 time on the Date & Time
tab page. If yes, the NTP server time synchronization is successful.
----End
9.2 Managing the Configuration File
This topic describes how to back up and load the configuration file.
During routine maintenance, configuration data may be missing due to abnormal device
restart or upgrade failure. Therefore, you are advised to back up the configuration file
periodically.
After backup is complete, you can load the configuration file as required to recover data.
The EGW1520 allows you to back up and load the configuration file in web mode. You can:

Back up the configuration file, which contains all the configurable data and can be
encrypted. For details, see Backing Up the Configuration File.

Load the configuration file in HTTP mode. For details, see Loading the Configuration
File (HTTP).

Load the configuration file in FTP mode. For details, see Loading the Configuration File
(FTP).

Load the configuration file in TFTP mode. For details, see Loading the Configuration
File (TFTP).

Load the configuration file in FTPS mode. For details, see Loading the Configuration
File (FTPS).
In FTP mode, data is transmitted in plain text. Load configuration files in FTP mode on
trusted networks.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
383
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Backing Up the Configuration File
Step 1 On the web management system, choose Management > Configuration from the navigation
tree.
The page shown in Figure 9-4 is displayed.
Figure 9-4 Backing up the configuration file
Step 2 (Optional) Select Encrypt Configuration File to encrypt the configuration file.
Step 3 Click
to back up the configuration file to the local host or other hosts on the
network as prompted.
The configuration file is in .xml format. The default file name is in CFG+WAN port's MAC
address.xml, for example, CFG001882ab2415.xml. You can also change the file name.
----End
Loading the Configuration File (HTTP)
Step 1 On the web management system, choose Management > Configuration from the navigation
tree.
Step 2 Click the Update tab.
The page shown in Figure 9-5 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
384
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Figure 9-5 Loading the configuration file (HTTP)
Step 3 Click Browse and select a configuration file.
Set the file path, which can be a local path, for example, D:\CFG001882ab2415.xml, or a
network path, for example, \\10.168.10.111\CFG001882ab2415.xml.
Step 4 Click
and proceed as prompted.
After loading is successful, the EGW1520 automatically restarts. After the restart is complete,
you can log in to the EGW1520 web management system.

The restart takes 2 to 3 minutes depending on the device configuration. If the
configuration data is more, the startup time is longer.

If the uploading fails, the configuration data on the EGW1520 remains. You can reload the
configuration file.

After the LAN port restarts, the management IP address changes to the imported IP
address.
----End
Loading the Configuration File (FTP)
Step 1 On the web management system, choose Management > Configuration from the navigation
tree.
Step 2 Click the Update tab.
Step 3 Click FTP.
The page shown in Figure 9-6 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
385
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Figure 9-6 Loading the configuration file (FTP)
Step 4 Set parameters according to Table 9-4.
Table 9-4 FTP parameters
Parameter
Description
FTP Server
IP address of the FTP server.
NOTE
Ensure that the FTP service is enabled when configuration files are loaded and that
the FTP server connects to the EGW1520 properly.
File Name
Relative path of the file to be uploaded. If the configuration file is stored
in C:/ftp/egw/CFG001882ab2415.xml and the access path that is set on
the FTP server is C:/ftp, set the relative path to
egw/CFG001882ab2415.xml.
Port Number
Port number of the FTP server, which is 21 by default.
Anonymous
If you select Anonymous, the EGW1520 connects to the FTP server as
an anonymous user that is the default user on the FTP server.
User Name
User name for logging in to the FTP server. This parameter is configured
on the FTP server.
Password
Password for logging in to the FTP server. This parameter is configured
on the FTP server.
Step 5 Click
Issue 01 (2012-05-15)
and proceed as prompted.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
386
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
After loading is successful, the EGW1520 automatically restarts. After the restart is complete,
you can log in to the EGW1520 web management system.

The restart takes 2 to 3 minutes depending on the device configuration. If the
configuration data is more, the startup time is longer.

If the uploading fails, the configuration data on the EGW1520 remains. You can reload the
configuration file.

After the LAN port restarts, the management IP address changes to the imported IP
address.
----End
Loading the Configuration File (TFTP)
Step 1 On the web management system, choose Management > Configuration from the navigation
tree.
Step 2 Click the Update tab.
Step 3 Click TFTP.
The page shown in Figure 9-7 is displayed.
Figure 9-7 Loading the configuration file (TFTP)
Step 4 Set parameters according to Table 9-5.
Table 9-5 TFTP parameters
Parameter
Description
TFTP Server
IP address of the TFTP server.
NOTE
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
387
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
9 System Management
Description
Ensure that the TFTP service is enabled when configuration files are loaded
and that the TFTP server connects to the EGW1520 properly.
File Name
Relative path of the file to be uploaded. If the configuration file is
stored in C:/tftp/egw/CFG001882ab2415.xml and the access path
that is set on the TFTP server is C:/tftp, set the relative path to
egw/CFG001882ab2415.xml.
Port Number
Port number of the TFTP server, which is 69 by default.
Step 5 Click
and proceed as prompted.
After loading is successful, the EGW1520 automatically restarts. After the restart is complete,
you can log in to the EGW1520 web management system.

The restart takes 2 to 3 minutes depending on the device configuration. If the
configuration data is more, the startup time is longer.

If the uploading fails, the configuration data on the EGW1520 remains. You can reload the
configuration file.

After the LAN port restarts, the management IP address changes to the imported IP
address.
----End
Loading the Configuration File (FTPS)
Step 1 On the web management system, choose Management > Configuration from the navigation
tree.
Step 2 Click the Update tab.
Step 3 Click FTPS.
The page shown in Figure 9-8 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
388
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Figure 9-8 Loading the configuration file (FTPS)
Step 4 Set parameters according to Table 9-6.
Table 9-6 FTPS parameters
Parameter
Description
FTPS Server
IP address of the FTPS server.
NOTE
Ensure that the FTPS service is enabled when configuration files are loaded and that
the TFTP server connects to the EGW1520 properly.
File Name
Relative path of the file to be uploaded. If the configuration file is stored in
C:/ftps/egw/CFG001882ab2415.xml and the access path that is set on the
FTP server is C:/ftps, set the relative path to
egw/CFG001882ab2415.xml.
Port Number
Port number of the FTPS server. The default port number is 990.
Anonymous
If Anonymous is selected, the EGW1520 connects to the FTPS server as
an anonymous user.
User Name
User name for logging in to the FTPS server. This parameter is configured
on the FTPS server.
Password
Password for logging in to the FTPS server. This parameter is configured
on the FTPS server.
Certificates
Certificate for authenticate logins.
NOTE
Before using the certificate to authenticate logins, configure the certificate by
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
389
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
9 System Management
Description
referring to 7.5.7 Certificate.
Step 5 Click
and proceed as prompted.
After loading is successful, the EGW1520 automatically restarts. After the restart is complete,
you can log in to the EGW1520 web management system.

The restart takes 2 to 3 minutes depending on the device configuration. If the
configuration data is more, the startup time is longer.

If the uploading fails, the configuration data on the EGW1520 remains. You can reload the
configuration file.

After the LAN port restarts, the management IP address changes to the imported IP
address.
----End
9.3 Restoring Factory Settings
This topic describes how to restore factory settings.
Before restoring factory settings, refer 9.2 Managing the Configuration File to back up the
configuration information of the current version.
After restoration, the EGW1520 restarts automatically to make the factory settings take effect.
To view factory settings, log in to the web management system again.
To restore factory settings, press the RESET button on the device or perform operations on
the web page.
RESET Button
Press RESET on the EGW1520 for longer than six seconds.
Web Mode
Step 1 On the web, choose Management > Restore Default from the navigation tree.
The page shown in Figure 9-9 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
390
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Figure 9-9 Restore page
Step 2 Click
and proceed as prompted.
After the EGW1520 restarts, the configuration data changes to factory settings. Use the IP
address 192.168.1.1, the user name admin and the password Admin@123 to log in to the
web management system again, see 7.7.1 Web Management.
----End
9.4 Managing System Logs
This topic describes how to manage system logs.
During the EGW1520 running, a large number of logs are generated and sent to the syslog
management module. You can send the log file to the Huawei technical support for faults
analysis. The EGW1520 provides the following log functions:

Backs up the log file remotely.
If the remote backup function is configured, the syslog management module sends the
log file to the log server for your remote maintenance. For details, see Backing Up Log
Files Remotely.

Backs up the log file locally.
If the local backup function is configured, the log file is saved in the local flash memory.
The EGW1520 allows you to download the latest log files from the flash memory on a
web page. For details, see Backing Up the Log File Locally.
The EGW1520 writes the flash memory when a 512 KB log is generated. When the size of
generated logs reaches 2 MB, the earliest logs are overwritten by the latest ones.

Issue 01 (2012-05-15)
Sets the log level.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
391
eSpace EGW1520 Enterprise Gateway
Product Documentation

9 System Management
Deletes the log file.
You can delete the log file in the local flash memory in web mode. For details, see
Deleting Logs.
Configuring Logs
Prerequisite
The log service has been started on the log server. The log path and log file name have been
set.
Configuration Procedure
Step 1 On the web management system, choose Diagnose > System Logs from the navigation tree.
The page shown in Figure 9-10 is displayed.
Figure 9-10 Enabling the function of generating logs
Step 2 Set log levels according to Table 9-7.
Table 9-7 Log level
Parameter
Description
Log Level
The options are as follows:
Issue 01 (2012-05-15)

Emergency: Error log, which indicates that a critical fault occurs
and the system cannot be recovered.

Alert: Error log, which indicates that a severe fault occurs and
must be rectified immediately.

Critical: Error log, which indicates that a major fault occurs.

Error: Error log, which indicates that a minor fault occurs.

Warning: Warning log, which indicates that certain functions are
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
392
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
9 System Management
Description
unavailable.

Notice: Notification log, which indicates that a major event
occurs.

Informational: Informational log, which indicates common events
and status information

Debugging: Debug log, which records information about system
internal debugging.
NOTE
To generate debug logs, set the log level to Debugging and enable the debug
log for each module. For details, see 8.1 Enabling the Debug Log.
The EGW1520 only sends log information whose level is equal to or higher than that you set
to the log server. The highest level is Emergency and the lowest level is Debugging.
Step 3 Click
to save the settings.
----End
Backing Up Log Files Remotely
Step 1 Enable the function of generating logs. For details, see Configuring Logs.
Step 2 Set Mode to Remote.
The page shown in Figure 9-11 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
393
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Figure 9-11 Remote backup
Step 3 Set parameters according to Table 9-8.
Table 9-8 Parameter description
Parameter
Description
Mode
Log backup mode. The options are as follows:

Local: Saves the log file to the local computer.

Remote: Sends the log file to the remote log server.

Both: Sends the log file to the local computer and the remote log
server.
Server IP Address
IP address of the log server. Set this parameter when Mode is set to
Remote or Both.
Server UDP Port
Port number of the log server. Set this parameter when Mode is set to
Remote or Both. The default value is 514.
Step 4 Click
to save the settings.
The log file is automatically sent to the log server.
----End
Backing Up the Log File Locally
Step 1 Enable the function of generating logs. For details, see Configuring Logs.
Step 2 Set Mode to Local.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
394
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
The page shown in Figure 9-12 is displayed.
Figure 9-12 Local backup
Step 3 Click
to save the settings.
The log file will be automatically saved to the local flash memory.
----End
Downloading Logs
Step 1 Enable the function of generating logs. For details, see Configuring Logs.
The page shown in Figure 9-13 is displayed.
Figure 9-13 Downloading logs
Step 2 Click
prompted.
Issue 01 (2012-05-15)
, and back up log files to the local host or other hosts on the network as
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
395
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management

The log file is in .log format. The default file name is in Log+Current EGW1520 system date.log
format, for example, Log20100101.log. You can also change the file name.

After downloading the log file, you can delete the log file from the flash memory according to
Deleting Logs.
----End
Deleting Logs
You can delete old logs from the flash memory.
Log information that is sent to the log server is not affected.
Step 1 Enable the function of generating logs. For details, see Configuring Logs.
The page shown in Figure 9-14 is displayed.
Figure 9-14 Deleting logs
Step 2 Click
and proceed as prompted.
----End
9.5 Viewing Alarms
This topic describes how to view alarms. You can analyze the exceptions occur during system
running according to the alarms.
Procedure
Step 1 On the web management system, choose Diagnose > Warning Info from the navigation tree.
The page shown in Figure 9-15 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
396
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Figure 9-15 Alarms
Step 2 Click
prompted.
to save the file to the local host or other hosts on the network as
To delete all alarms, click
----End
9.6 Viewing Security Logs
This topic describes how to view security logs to query the recent operations.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
397
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
When automatic software upgrade is configured, the system generates security logs only for the first
upgrade.
Procedure
Step 1 Choose Diagnose > SecurityLog Info from the navigation tree.
A page shown in Figure 9-16 is displayed.
Figure 9-16 Viewing security logs
Step 2 Click
prompted.
and back up log files to the local host or other hosts on the network as
To delete all security logs, click
logs.
. Only network administrators can delete all security
Log sample
A log sample is as follows:

User ID: 192.168.1.8

Log type: alarmlog

Time: 1970–01–01 01:28:30
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
398
eSpace EGW1520 Enterprise Gateway
Product Documentation

9 System Management
Log information: Downloaded alarm logs succeed
The following is a detailed description of the preceding log sample:

admin/192.168.1.8: The user name is admin and the user ID is 192.168.1.8.

alarmlog: This log is an alarm log.

1970–01–01 01:28:30: Time when this operation is performed.

Downloaded alarm logs succeed: This alarm log is downloaded successfully.
For details about the security log information, see 12.2 Security Log Information.
----End
9.7 Viewing Electronic Labels
You can learn about the device information based on its electronic label.
To view the electronic label of a device, perform the following operations:
Step 1 You have logged in to the web management system. For details, see 7.7.1 Web Management
Step 2 Choose Management > Status >
from the navigation tree.
The system displays a page, as shown in Figure 9-17.
Figure 9-17 Electronic label (1)
Step 3 Click Electronic Label .
The system displays a page, as shown in Figure 9-18.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
399
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Figure 9-18 Electronic label (2)
Table 9-9 describes the parameters in the electronic label information.
Table 9-9 Description of electronic label parameters
Parameter
Meaning
BoardType
Model of the field replaceable unit (FRU).
BarCode
Bar code of the FRU, which is the same as the device bar code.
Item
BBOM code of the FRU.
Description
Description of the FRU.
Manufactured
Manufacture date of the FRU.
VendorName
Vendor name of the FRU.
IssueNumber
Issue number of the FRU.
CLEICode
CLEI code of the FRU.
BOM
Specific item code of the FRU.
The physical label is affixed to he bottom of the device.
----End
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
400
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
9.8 Downloading Call Records
This topic describes how to back up call records on the local computer.
The call record backup function has the following features:

Saves the latest 5000 records. When the number of saved call records reaches 5,000, the
system overwrites the earliest call records to save the latest ones.

Saves 40 call records each time. If the number of latest call records is smaller than 40,
the system saves call records at an interval of four hours.

Saves the call start and end time, and the calling and called numbers.
Configuration procedure
Step 1 On the web management system, choose Diagnose > Call Recording from the navigation
tree.
Step 2 Set Call Recording to Enable.
The page shown in Figure 9-19 is displayed.
Figure 9-19 Downloading call records
By default, the system disables the call record backup function.
Step 3 Click
to save the settings.
Step 4 Click
to download call records that are saved. Download call records to a
local host or other hosts on the network.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
401
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management

The call record file must be in the .txt format. The default file name is in CDR+Current
EGW1520 system date.txt format, for example, CDR20110101.txt. You can also change
the file name.

Click the Delete All Records After Download option button. Then the web management
system will delete call records after the downloading is complete.
----End
9.9 One-Click Download
This topic describes how to use the one-click download function to collect system information.
If the system is faulty, you can download system information and send it to the maintenance
personnel for fault location.
The EGW1520 provides the one-click download function for you to collect the following
information:

System configurations (device model, hardware version, software version, MAC address
on WAN port, IP address on WAN port, and IP address on LAN port)

System logs

Alarm information
Procedure
Step 1 On the web management system, choose Diagnose > One-Click Download from the
navigation tree.
The page shown in Figure 9-20 is displayed.
Figure 9-20 One-click download
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
402
eSpace EGW1520 Enterprise Gateway
Product Documentation
Step 2 Click
9 System Management
to download information.
----End
9.10 Changing the Password
This topic describes how to change the password for logging in to the EGW1520.
The EGW1520 allows a maximum of 10 users to log in at the same time.
The new password takes effect upon the next login. When a user changes the password, other
users who have logged in are not affected.
If you forget the password, you can only restore the password to the default factory setting. As
a result, the configuration data is lost.
Procedure
Step 1 On the web management system, choose Management > Change Password from the
navigation tree.
The page shown in Figure 9-21 is displayed.
Figure 9-21 Change Password page
Step 2 Set parameters according to Table 9-10.
Table 9-10 Parameter description
Parameter
Description
Use a strong
Password
Indicates whether to set a complicated password. If this parameter is
enabled, the password must contain special characters, such as @, #
and %.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
403
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Parameter
Description
User Name
Indicates the user name. The user name is admin and cannot be changed.
Old Password
Indicates the current password.
New Password
Indicates the new password to be set. The password consists of 6 to 16
characters.
Confirm
Password
Indicates that the user enters the new password again.
Step 3 Click
to save the settings.
----End
9.11 Upgrading Host Software
This topic describes how to upgrade host software.
The EGW1520 allows you to upgrade the host software on a web page. The following modes
are provided:

HTTP mode

FTP mode

TFTP mode

FTPS mode
Upgrade procedures vary according to version. For details on the host software storage path
and upgrade methods, see the eSpace EGW1520 Upgrade Guide.
If the device is powered off or network communication is interrupted during software upgrade,
the device may crash or the configuration file may be lost.
9.12 Uploading Voice Files
This topic describes how to upload voice files.
Voice files can be uploaded to the EGW1520 to play announcements for users.
The EGW1520E allows you to upload voice files in .pcm format or compressed voice file
packages in .zip format on a web page. The following modes are provided:

HTTP Mode

FTP Mode
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
404
eSpace EGW1520 Enterprise Gateway
Product Documentation

TFTP Mode

FTPS Mode
9 System Management

By default, Chinese voice files are loaded on the EGW1520. You can choose Voice >
Upload Voice File to change the language.

When uploading a voice file in .pcm format, ensure that the file size is not greater than 1
MB. When uploading a voice file in .zip format, ensure that the file size is not greater than
30 MB.

In FTP mode, data is transmitted in plain text. Load configuration files in FTP mode on
trusted networks.
HTTP Mode
Step 1 On the web management system, choose Voice > Upload Voice File from the navigation tree.
The page shown in Figure 9-22 is displayed.
Figure 9-22 Upload Voice File page (HTTP)
Step 2 Click Browse and select the voice file to be uploaded.
The voice file path can be a local path, for example, D:\english.zip, or a network path, for
example, \\10.168.10.111\english.zip.
Step 3 Click
and proceed as prompted.
After the loading is successful, the Message page is displayed, as shown in Figure 9-23.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
405
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Figure 9-23 Success message
If the loading fails, the voice file on the EGW1520 remains. You can reload the voice file.
----End
FTP Mode
Step 1 On the web management system, choose Voice > Upload Voice File from the navigation tree.
Step 2 Click FTP.
The page shown in Figure 9-24 is displayed.
Figure 9-24 Upload Voice File page (FTP)
Step 3 Set parameters according to Table 9-11.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
406
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Table 9-11 FTP parameters
Parameter
Description
FTP Server
Indicates the IP address of the FTP server.
NOTE
Ensure that the FTP service is enabled when configuration files are loaded and that
the FTP server connects to the EGW1520 properly.
File Name
Indicates the relative path of the file to be uploaded. If the file to be
uploaded is stored in C:/ftp/egw/voice.zip and the access path that is set on
the FTP server is C:/ftp, set the relative path to egw/voice.zip.
Port Number
Indicates the port number of the FTP server. The default value is 21.
Anonymous
If you select Anonymous, the EGW1520 connects to the FTP server as an
anonymous user that is the default user on the FTP server.
User Name
Indicates the user name for logging in to the FTP server. This parameter is
configured on the FTP server.
Password
Indicates the password for logging in to the FTP server. This parameter is
configured on the FTP server.
Step 4 Click
and proceed as prompted.
After the loading is successful, the Message page is displayed, as shown in Figure 9-25.
Figure 9-25 Success message
If the loading fails, the voice file on the EGW1520 remains. You can reload the voice file.
----End
TFTP Mode
Step 1 On the web page's navigation bar, choose Voice > Upload Voice File.
Step 2 Click TFTP.
The page shown in Figure 9-26 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
407
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Figure 9-26 Upload Voice File page (TFTP)
Step 3 Set parameters according to Table 9-12.
Table 9-12 TFTP parameters
Parameter
Description
TFTP Server
Indicates the IP address of the TFTP server.
NOTE
Ensure that the TFTP service is enabled when configuration files are loaded and
that the TFTP server connects to the EGW1520 properly.
File Name
Indicates the relative path of the file to be uploaded. If the file to be
uploaded is stored in C:/tftp/egw/voice.zip and the access path that is
set on the FTP server is C:/tftp, set the relative path to egw/voice.zip.
Port Number
Indicates the port number of the TFTP server, which is 69 by default.
Step 4 Click
and proceed as prompted.
After the loading is successful, the Message page is displayed, as shown in Figure 9-27.
Figure 9-27 Success message
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
408
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
If the loading fails, the voice file on the EGW1520 remains. You can reload the voice file.
----End
FTPS Mode
Step 1 On the web page's navigation bar, choose Voice > Upload Voice File.
Step 2 Click FTPS.
The page shown in Figure 9-28 is displayed.
Figure 9-28 Upload Voice File page (FTPS)
Step 3 Set parameters according to Table 9-13.
Table 9-13 FTPS parameters
Parameter
Description
FTPS Server
IP address of the FTPS server.
NOTE
Ensure that the FTPS service is enabled when configuration files are loaded and
that the TFTP server connects to the EGW1520 properly.
File Name
Issue 01 (2012-05-15)
Indicates the relative path of the file to be uploaded. If the file to be
uploaded is stored in C:/ftps/egw/voice.zip and the access path that is
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
409
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
9 System Management
Description
set on the FTPS server is C:/ftps, set the relative path to egw/voice.zip.
Port Number
Port number of the FTPS server. The default port number is 990.
Anonymous
If Anonymous is selected, the EGW1520 connects to the FTPS server as
an anonymous user.
User Name
Indicates the user name for logging in to the FTPS server. This
parameter is configured on the FTPS server.
Password
Indicates the password for logging in to the FTPS server. This parameter
is configured on the FTPS server.
Certificates
Certificate for authenticate logins.
NOTE
Before using the certificate to authenticate logins, configure the certificate by
referring to 7.5.7 Certificate.
Step 4 Click
and proceed as prompted.
After the loading is successful, the Message page is displayed, as shown in Figure 9-29.
Figure 9-29 Success message
If the loading fails, the voice file on the EGW1520 remains. You can reload the voice file.
----End
9.13 Restarting the EGW1520
This topic describes how to restart the EGW1520.
You can restart the EGW1520 on the web page or pressing the RESET button on the device.
RESET Button
Press RESET on the EGW1520 for six seconds or shorter.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
410
eSpace EGW1520 Enterprise Gateway
Product Documentation
9 System Management
Web Mode
Step 1 On the web management system, choose Management > Restart from the navigation tree.
The page shown in Figure 9-30 is displayed.
Figure 9-30 Restart page
Step 2 Click
and proceed as prompted.
The restart takes 2 to 3 minutes depending on the device configuration. More configurations
indicate a longer restart duration. Access the web management system to check whether the
restart is complete. The restart is complete if you can access the page.
----End
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
411
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
10
Security Maintenance
About This Chapter
This topic describes the concept and methods for maintaining the EGW1520.
10.1
Overview
10.2
Application Layer Security
10.3 System Layer Security
10.4 Network Layer Security
10.5 Management Layer Security
10.6
Appendix
10.1 Overview
10.1.1 Objectives
Application systems are facing growing security threats. If a security problem occurs, services
will be interrupted, profits will decrease, and the system may break down. To detect potential
security problems and resolve them in time, users need to establish an all-round protection
system and execute maintenance tasks with a hierarchical approach.
As new security threats emerge continuously, technical methods are insufficient to ensure the
security of application systems. Therefore, users also need to develop a security management
system based on the suggestions given on problems found in routine security maintenance,
which ensures proper running of the applications.
10.1.2 Layered Security Maintenance
Based on the security maintenance objects and objectives, security maintenance on service
systems must be conducted at different layers.
Application Layer
The security maintenance at this layer is conducted to ensure that the EGW1520 and related
web management system run properly and provide services correctly.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
412
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
System layer
Security maintenance at this layer is conducted to ensure that the operating system runs
properly, ensuring the proper running of applications at the application layer.
At the system layer, security maintenance is conducted using the maintenance terminals or
tools corresponding to the maintenance objects.
Network Layer
Security maintenance at this layer is conducted to ensure the proper running of switches,
routers, and firewalls and to ensure the application of security policies at this layer.
At the network layer, security maintenance is conducted using the maintenance terminals or
tools of the maintenance objects.
Management layer
Security maintenance at this layer is conducted to enhance manual management and
maintenance to prevent potential risks. The preceding layers are involved in
management-layer security maintenance.
10.1.3 EGW1520 Security Overview
This topic describes the EGW1520 security solution.
Security is essential to communications products and systems. The EGW1520 security
solution contains the following layers:

The security at the management layer ensures the system maintenance, running, security,
and continuity.

The security at the application layer protects all Huawei applications, including access,
data, communication, and coding.

Security at the system layer protects the operating systems, databases, and middleware
used by applications.

The security of the network layer protects the network devices and communication.
With the cooperation of the four layers, the EGW1520 security solution provides security
protection for small-sized enterprises.
Figure 10-1 shows the layered architecture of the EGW1520 security solution.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
413
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
Figure 10-1 Layered architecture of the EGW1520 security solution
10.2 Application Layer Security
10.2.1 Application Layer Account Management
Accounts at the application layer
Table 10-1 listed the accounts at the application layer.
Table 10-1 Accounts at the application layer
User Name
Default
Password
Function
Remarks
admin
Admin@12
Account for logging in to the
web management system.
The user name and password
are both case sensitive. The
user name and rights cannot
be changed.
Password Principle

Issue 01 (2012-05-15)
The login password must contain at least six digits.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
414
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance

The login password and service (for example, voice mailbox) password cannot be
displayed on GUIs in clear text, and must be encrypted before they are stored.

Before changing a password, you must enter the original password.
Changing a Password
Step 1 On the web management system, choose Management > Change Password from the
navigation tree.
The page shown in Figure 10-2 is displayed.
Figure 10-2 Change Password page
Step 2 (Optional) Enable the strong password. If this parameter is enabled, the password must
contain special characters, such as @,#,%.
Step 3 Enter the original password, new password, and confirm password as prompted.
Step 4 Click
to save the settings.
----End
10.2.2 Web Access Control
Web access control methods of the EGW1520 are as follows:

Combination of Session and Cookie
If you do not perform any operation in 10 minutes after logging in to the web
management system, the login times out and the system requires re-login to ensure
security.

Logout request initiated by a client
After logging in to the web management system, click Log Out at the upper-right corner.
The confirm dialog box is displayed. Click OK. The login dialog box is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
415
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
10.2.3 Application Data Protection
Encrypting a Configuration File
Step 1 On the web management system, choose Management > Configuration from the navigation
tree.
The page shown in Figure 10-3 is displayed.
Figure 10-3 Backing up the configuration file
Step 2 Select Encrypt Configuration File to encrypt the whole configuration file.
Step 3 Click
to save the configuration file to the local host or other hosts on the
network as prompted.
----End
10.2.4 Application Layer Log Check
This topic describes how to check application layer logs. To ensure the application layer
security, you must check the application layer logs periodically.
Checking the log function
Step 1 On the web management system, choose Diagnose > System Logs from the navigation tree.
The page shown in Figure 10-4 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
416
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
Figure 10-4 Enabling the log function
Step 2 Click
to save the settings.
----End
Checking Log Generation
Step 1 Set Mode to Local.
Step 2 Click
to save the logs to the local host.
Step 3 Verify that log files are displayed on the local desktop.
The log file is in .log format. The default file name is in admin_Log+Current EGW1520
system date.log format, for example, Log20100101.log.
Step 4 Open the local log files to view logs.
----End
Releasing the Log Storage Space
The EGW1520 writes the flash memory when a 512 KB log is generated. When the size of
generated logs reaches 2 MB, the earliest logs are overwritten by the latest ones.
The administrator must download and delete logs in the log management module to release
the log storage space periodically.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
417
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
10.3 System Layer Security
Security maintenance at this layer is conducted to ensure that the operating system runs
properly, ensuring the proper running of applications at the application layer.
The system layer security maintenance contains:

System log function that can help checking system security. For details, see 10.2.4
Application Layer Log Check.

Web management system function that supports the EGW1520 connecting to the client
through HTTPS.
Logging In to the Web Management System
Step 1 On the maintenance terminal, open Internet Explorer, and enter https://192.168.1.1 in the
address box.

If errors about the security certificate occur during the login process, click Yes to go on.

After logging in to the web management system, you can change IP address of the EGW1520. For
details, see Configuring the LAN.
Step 2 Press Enter, and the page shown in Figure 10-5 is displayed.
Figure 10-5 Logging in to the web management system (1)
Step 3 Enter the user name admin and default password Admin@123, and click Log in. The page
shown in Figure 10-6 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
418
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
Figure 10-6 Logging in to the web management system (2)

Choose Management > Change Password to change the password after the initial login.

Make a note of your password and keep it in a safe place. Do not share your password
with anyone. If you forget your password, press and hold the RESET button on EGW1520
for more than six seconds, and log in to the web management system using the default
password Admin@123. The configuration is restored to factory settings.

If you fail to log in to the web management system for 5 consecutive times within 10
minutes, the system locks your PC IP address for 30 minutes.

If you do not perform any operation in 10 minutes after logging in to the web management
system, the login times out and the system requires re-login to ensure security.
----End
10.4 Network Layer Security
The network layer provides firewall, Demilitarized Zone (DMZ), and VLAN division
functions.
10.4.1 Security Network
Figure 10-7 shows the security network of the EGW1520 solution.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
419
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
Figure 10-7 EGW1520 security network
The EGW1520 security network:

Is deployed at the entrance and exit of the enterprise network, which provides the
firewall function to filter information and prevent unauthorized access.

Provides the filtering function, which can configure Internet access policy and protect
the network security.

Provides the NAT ALG function based on the SIP protocol to ensure the voice
communication security.

Provides the DMZ function to protect the internal network. External users can access
only internal servers in the DMZ.

Provides the VLAN division function to separate different zones in the network.
10.4.2 Network Security Maintenance
Firewall Security Check on the WAN Side
The EGW1520 provides the firewall function to filter information and prevent unauthorized
access.
Enabling the firewall
Step 1 On the web management system, choose Network > WAN from the navigation tree.
The page shown in Figure 10-8 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
420
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
Figure 10-8 Enabling the firewall (1)
Step 2 Click
The page shown in Figure 10-9 is displayed.
Figure 10-9 Enabling the firewall (2)
Step 3 Click
The page shown in Figure 10-10 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
421
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
Figure 10-10 Enabling the firewall (3)
Step 4 Set Firewall to Enable.
----End
Checking the Firewall Function
If you enable the firewall on the WAN side, packets that are being sent to an EGW1520 or a
downstream device will be blocked by the firewall on the WAN side.
By configuring the incoming packet filter function, you can specify packets that can be sent
through the firewall on the WAN side.
DMZ Security Check
External systems can use virtual servers to access the intranet server. When large amounts of
services are running on the intranet server, multiple virtual servers must be configured. You
can configure the DMZ to simplify the virtual server configuration process.
Enabling the DMZ Function
Step 1 On the web management system, choose Network > Security from the navigation tree.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
422
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
Step 2 Click the DMZ Host tab.
The page shown in Figure 10-11 is displayed.
Figure 10-11 Configuring the DMZ (1)
Step 3 Enter the DMZ Host IP address.
Step 4 Click
to save the settings.
----End
Checking the DMZ Function
Step 1 Connect the EGW1520 to the Internet through the WAN port as an internal user, and set the
IP address to 11.11.11.1 for the WAN port.
Step 2 Set the DMZ Host IP address to 192.168.1.5 on the EGW1520.
Step 3 Configure the web and FTP servers on the server whose IP address is 192.168.1.5 as the
internal user.
Step 4 Open Internet Explorer and enters https://11.11.11.1 or ftp://11.11.11.1 in the address box as
an external user.
----End
If the external user can access the web or FTP server, the DMZ is configured successfully.
VLAN Security Check
VLANs are created on a physical LAN to separate the LAN into multiple broadcast domains.
Hosts on a VLAN can communicate with each other, and hosts between VLANs cannot
communicate with each other. That is, broadcast packets can be sent between hosts on the
same VLAN, which improves network security.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
423
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
Configuring the VLAN
The EGW1520 supports port-based VLANs. LAN ports are added to different VLANs so that
users are separated and virtual working groups are divided.
Step 1 On the web management system, choose Network > VLAN from the navigation tree.
The page shown in Figure 10-12 is displayed.
Figure 10-12 Configuring the VLAN (1)
Step 2 Click
corresponding to the port to be configured in the Operation column.
The page shown in Figure 10-13 is displayed.
Figure 10-13 Configuring the VLAN (2)
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
424
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
Step 3 Set parameters according to Table 10-2.
Table 10-2 VLAN parameters
Parameter
Description
Port
Indicates the LAN port on the EGW1520. The EGW1520 provides four
LAN ports (LAN1 to LAN4).
VLAN ID
Indicates the VLAN that port belongs to. The default value is 1.
Priority
Indicates the 802.1p priority based on which devices that connect to the
port (such as a switch) process packets. The value ranges from 0 to 3. A
larger value indicates a higher priority.
Link type
The options are as follows:
Permit
VLAN ID

Access: Ports of this type can be added to only one VLAN, and are
always connected to PCs and switches.

Trunk: Ports of this type can be added to multiple VLAN, and can
identify and transmit packets that belong to multiple VLANs based on
the VLAN tag.
Indicates the VLAN ID that is allowed to pass through the port. This
parameter is configurable only when Link type is set to Trunk.
Step 4 Click
to save the settings.
----End
Checking the VLAN Function
Figure 10-14 shows the typical network.
Figure 10-14 Typical VLAN network
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
425
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
Step 1 Change the VLAN IDs to VLAN 2 for LAN1 and LAN2, and to VLAN 3 for LAN3 on
EGW1520 A. Set the connection type to Access
Step 2 Change the connection type to Trunk for LAN4 on EGW1520 A, and set the VLAN
changing range to 3.
Step 3 Change the VLAN IDs to VLAN 3 for LAN1 on EGW1520 B. Set the connection type to
Access
Step 4 Change the connection type to Trunk for LAN4 on EGW1520 B, and set the VLAN
changing range to 3.
----End
After the configuration, hosts on the same VLAN can communicate with each other. Hosts on
different VLANs cannot communicate with each other.
10.5 Management Layer Security
This topic describes general maintenance suggestions for routine security maintenance.
Carriers can formulate security management regulations by referring to these suggestions and
abide by these regulations to ensure system security.
10.5.1 Security Principles for System Maintenance
Minimum Principle

Install only required services and components.

The functions and roles of servers must be distinguished. Do not install unnecessary
services and components.

A service's internal components must be downsized according to the preceding
principles.
Minimum Accounts

Accounts must be managed strictly according to account policies.

The addition, modification, and deletion of accounts in the system must be strictly
controlled.
Minimum Rights

Assign minimum rights to system services and accounts.

Control right assignment strictly in the operating system.

A host must run only one type of service.

Partitions where the operating system, applications, and data are located must be
separated.
Dedication
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
426
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
Audit

Operations on the host must be logged and monitored in other feasible methods.

Failures to access the system's important resources must be audited.

Successes in accessing the system's key resources must be audited.

Successes and failures to modify the access control policies must be audited.
10.5.2 Password Maintenance
Users need to be authenticated when they attempt to log in to the application system portal.
The carrier can configure the account and password complexity, and password validity period
based on security requirements.
During password maintenance, ensure that:

The admin user's password is kept by a designate person.

Passwords must be encrypted before transfer. Do not transfer passwords using emails.

Huawei engineers need to request the customer to change passwords before system
delivery.
10.5.3 Log Maintenance
The system administrator can detect potential risks according to logs.
Checking Logs Periodically
The maintenance personnel need to periodically check system logs. If any faults are detected,
they must report them to the upper-level departments. If the causes cannot be located or the
faults cannot be rectified, contact the local representative office or Huawei technical support
center.
Backing Up Logs Periodically
The maintenance personnel need to periodically save log files to external storage media such
as disks, tapes, and CD-ROMs for backup. After successful backup, the original log files need
to be deleted to free up the space.
10.5.4 Security Evaluation
You are advised to find a qualified evaluation organization to evaluate the system security.
When implementing security evaluation, contact Huawei technical support engineers.
10.5.5 Vulnerability Scanning
You are advised to use tools to scan vulnerabilities. To use Huawei vulnerability scanning tool,
contact Huawei technical support engineers.
10.5.6 Data Backup
Based on security maintenance requirements, back up data in the following scenarios:

Before and after security configuration, maintenance, and troubleshooting

Upgrade
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
427
eSpace EGW1520 Enterprise Gateway
Product Documentation
10 Security Maintenance
For details, see the eSpace Upgrade Guide.
10.5.7 Network Connection Change
When the network connection changes, you are advised to:

Ensure that the new security policy cannot affect the original security policy.

Analyze the network topology.
10.5.8 Defect Reporting
If the customer system is attacked, Huawei technical support engineers will solve this
problem depending on whether any security accidents occur.

If a security accident occurs, Huawei technical support engineers will provide remote or
on-site support to mitigate the attack impact with the assistance of customer maintenance
personnel and generate an accident handling report.

If no security accident occurs, Huawei technical support engineers will record the
problem information and forward it to the research and development (R&D) team to
process. After the R&D team works out a solution, Huawei technical support engineers
will analyze the solution impact on services and develop a feasible solution.
10.5.9 Emergency Response Mechanism
The customer must formulate the emergency response mechanism to deal with emergencies,
recover the system, and minimize losses.
10.6 Appendix
The communication matrix must be customized based on the actual network. For details, see
Communication Matrix.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
428
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
11
Troubleshooting
About This Chapter
This topic provides the method to use for troubleshooting when typical faults are found in the
EGW1520.
11.1 Precautions
This topic describes the precautions for troubleshooting.
11.2 Troubleshooting Process
This topic describes the EGW1520 troubleshooting process.
11.3 Voice-Specific Faults
Voice-specific faults mainly refer to the faults that occur during user registration, call setup,
and service invocation.
11.4 Network Faults
Network faults primarily include network port indicator fault and uplink network
disconnection.
11.5 System Faults
System faults mainly include web management system fault and failure to obtain the system
time from the NTP server.
11.1 Precautions
This topic describes the precautions for troubleshooting.
Before locating and troubleshooting faults, you must read and observe the following
precautions:

Strictly comply with the operation and industry rules and regulations to ensure safety of
personnel and devices.

Observe anti-static safety measures (for example, wear anti-static wrist straps).

Record details about all the faults that occur during maintenance.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
429
eSpace EGW1520 Enterprise Gateway
Product Documentation

11 Troubleshooting
Record all the important operations, for example, restarting a process and restoring
factory settings. An important operation must be performed by qualified operators after
the related data is backed up and proper measures are provided against security and
emergency events.
11.2 Troubleshooting Process
This topic describes the EGW1520 troubleshooting process.
The EGW1520 troubleshooting process involves collecting fault information, rectifying faults,
verifying fault rectification, compiling troubleshooting reports, and obtaining Huawei
technical support.
Figure 11-1 shows the troubleshooting flowchart.
Figure 11-1 Troubleshooting flowchart
11.2.1 Collecting Fault Information
Detailed fault description helps to quickly locate faults. The scenario information, networking
information, and system information must be collected when a fault occurs.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
430
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Collecting Scenario Information
This topic describes the fault scenario information that must be collected immediately after a
fault occurs.
Collect the following scenario information after a fault occurs:

Fault occurrence time and place

Fault symptom

Operations that were performed before the fault occurred

Measures that have been taken after the fault occurred and the results

Services that were affected by the fault and the scope of the fault
Collecting Networking Information
Networking information helps maintenance personnel to simulate the fault scenario and locate
the fault.
The maintenance personnel must document and save the following onsite information:

Physical network, including physical connections and connection media.

Device names and versions.

Logical connections between devices.

Device interconnection information, such as the VLAN, IP address, subnet, gateway or
port of a device.
Collecting System Information
System information includes information about the device, network, route, Address
Resolution Protocol (ARP), and Dynamic Host Configuration Protocol (DHCP). By collecting
system information, you can learn about the software and hardware versions and detailed
network information.
To collect the EGW1520 system information, perform the following operations:
1.
Log in to the web management system. For details, see 7.7.1 Web Management.
2.
Choose Management > Status from the navigation tree on the left.
The page shown in Figure 11-2 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
431
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-2 Collecting system information
3.
Select Device, Network, Route, ARP, and DHCP Client in turn to view and manually
record system information.
For the description of the parameters that are displayed when you select Device, Network, Route, ARP,
or DHCP Client, see Web Parameters Reference.
11.2.2 Rectifying Faults
After locating a fault, take proper measures to rectify the fault.
Take measures based on the fault symptom. For the troubleshooting cases, see 11.3
Voice-Specific Faults, 11.4 Network Faults, and 11.5 System Faults.
11.2.3 Verifying Fault Rectification
After taking measures to rectify a fault, verify that the fault is rectified.
If the fault is rectified, compile a troubleshooting report. If the fault is not rectified, contact
Huawei technical support engineers.
11.2.4 Compiling a Troubleshooting Report
After verifying that a fault is rectified, record the fault rectification process and compile a
troubleshooting report for future reference.
The troubleshooting report should include: fault symptom, fault location, fault rectification,
and preventive suggestions.
11.2.5 Obtaining Technical Support
Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and
service. Please feel free to contact our local office or company headquarters.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
432
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Huawei Technologies Co., Ltd.
Address: Administration Building, Huawei Technologies Co., Ltd., Bantian, Longgang
District, Shenzhen, P. R. China
Postal Code: 518129
Website: http://support.huawei.com
Customer service telephone: 4008302118
Email: support@huawei.com
11.3 Voice-Specific Faults
Voice-specific faults mainly refer to the faults that occur during user registration, call setup,
and service invocation.
11.3.1 Voice Service Users Cannot Register with the
IMS/NGN Network
This topic provides the method to use for troubleshooting when voice service users cannot
register with the IMS/NGN network.
Symptom
After network and voice data are configured on the EGW1520, EGW1520 voice service users
cannot register with the IP Multimedia Subsystem (IMS) network or Next Generation
Network (NGN), and the value of User Status is Fault.
The page shown in Figure 11-3 is displayed.
Figure 11-3 Voice Service Users Cannot Register with the IMS/NGN Network
Possible Causes

A network exception has occurred.

The SIP server configuration is incorrect.

The number configuration is incorrect.

The Network Address Translation (NAT) function is disabled.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
433
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Troubleshooting Procedure
Step 1 Check the network connection.
Check the network connection in either of the following ways:

Check whether the Internet indicator is on. If the indicator is on or blinks, the EGW1520
has been registered with the network service provider and the network connection is
normal.

Choose Management > Status from the navigation tree on the web management
system,click the Network tab. If the value of Status is Connected on the Network page,
the network connection is normal.
If the network connection is abnormal, see Installation to verify the cable connections and 7.2
Connection Modes to verify the network configuration.
Step 2 Verify the SIP Server parameter settings.
1.
Choose Voice > SIP Server from the navigation tree on the web management system.
The page shown in Figure 11-4 is displayed.
Figure 11-4 SIP Server page
2.
Ensure that the parameters listed in Table 11-1 are set correctly.
Table 11-1 SIP Server parameters
Parameter
Description
Working Mode

Master: active SIP server

Slave: standby SIP server
Recovery
Indicates whether to enable the failback function. When the active
server fails, resources and services will be automatically switched to
the standby server. If this function is enabled, resources and services
will be automatically switched back to the original active server
after the original active server has been recovered.
Option Interval
Interval for sending option messages to the active server. Option
messages are used to check whether the active server can be used.
NOTE
This parameter is valid only for the master server.
Address Type
Issue 01 (2012-05-15)
The address can be an IP address or a domain name. The network
carrier provides this value.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
434
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Parameter
Description
IP/Domain
IP address or domain name of the SIP server. The network carrier
provides this value.
DNS Type
Mode for the DNS server to parse the IP address. This parameter is
valid when Address Type is set to Domain.

SRV: A domain name is configured to parse multiple IP address.
The two IP addresses with the highest priorities are the IP
addresses of the active SIP server and standby SIP server.
NOTE
If you set DNS Type to SRV, you do not need to configure the standby SIP
server.

HOST: One domain name corresponds to one IP address. To
perform switchover between the active and standby servers, two
SIP servers need to be configured.
Server Type
Select a server type according to the actual SIP network connected
to the EGW1520.
Port
Port number of the SIP server. The network carrier provides this
value. The default value 5060 is recommended.
Expiration Time
Timeout interval for the registration group to register with the SIP
server, in seconds. The value ranges from 0 to 14400. The default
value 360 is recommended.
Step 3 Choose Voice > Phone Allocation from the navigation tree on the web management system,
and check the registration group and external number configuration for Analog Phone users
and IP Phone users. The registration group and external number configuration must be
consistent with the settings on the IMS/NGN side. If an external number is prefixed with a
plus sign (+), change the plus sign to 00.
Step 4 Check whether the NAT function is enabled.
Choose Management > Status from the navigation tree on the web management system,click
the Network tab. If the value of NAT is not Enabled on the Network tab page, see
Configuring ADSL or Configuring WAN to delete the Asymmetric Digital Subscriber Line
(ADSL) or Wide Area Network (WAN) connection and add another ADSL or WAN
connection to enable the NAT function.
Step 5 If the fault persists, see Obtaining Huawei Technical Support.
----End
11.3.2 Failure to Make Outer-Office Calls
This topic provides the method to use for troubleshooting when outer-office calls cannot be
made.
Symptom

Issue 01 (2012-05-15)
Intra-office users cannot make calls to outer-office users.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
435
eSpace EGW1520 Enterprise Gateway
Product Documentation

11 Troubleshooting
When an intra-office user makes a call to an outer-office user, the first call attempt fails
and the second succeeds.
Possible Causes
The dial on demand function is enabled on the EGW1520.
Troubleshooting Procedure
Step 1 Check whether the dial on demand function is enabled on the EGW1520.
1.
Choose Management > Status from the navigation tree on the web management system.
2.
Click theNetwork tab. Check the value of Status.
The page shown in Figure 11-5 is displayed.
Figure 11-5 Value of Status

If the value of Status is Idle, the dial on demand function is enabled on the EGW1520.
Then go to 2.

If the value of Status is not Idle, go to 3.
Step 2 Disable the dial on demand function on the EGW1520.
The following describes how to disable the WAN dial on demand function. To disable the
ADSL dial on demand function, see ADSL Configuration.
1.
Select Network > WAN from the navigation tree on the web management system.
The page shown in Figure 11-6 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
436
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-6 Configuring the WAN connection (1)
2.
Click
The page shown in Figure 11-7 is displayed.
Figure 11-7 Configuring the WAN connection (2)
3.
Click
The page shown in Figure 11-8 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
437
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-8 Disabling the dial on demand function
4.
Deselect Dial on demand (with idle timeout timer) to disable the dial on demand
function.
Step 3 If the fault persists, see Obtaining Huawei Technical Support.
----End
11.3.3 Calls Cannot Be Set Up Between an IP Phone and an
Analog Phone
This topic provides the method to use for troubleshooting when calls cannot be set up between
an IP phone and an analog phone.
Symptom
Calls cannot be set up between an IP phone and an analog phone.
Possible Causes

Cable connections are incorrect.

One or both phones are faulty.

The two phones use different codecs.

The IP Phone gateway configuration is incorrect.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
438
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Troubleshooting Procedure
Step 1 Check cable connections between the IP phone and an analog phone. If the cable is
disconnected from either phone, reconnect it. Use a new cable if the original one is damaged.
Step 2 Check the phones. If they are faulty, replace them.
Step 3 Check the voice codecs configured on IP phones and EGW1520. Ensure that they share at
least one voice codec.
To change the voice codec of the IP phone, see the IP phone user manual. The voice codec of
the analog phone is determined by the voice codec of EGW1520. To change the voice codec
of the analog phone, proceed as follows:
1.
Choose Voice > Voice Parameters from the navigation tree on the web management
system.
2.
Click the DSP tab.
The page shown in Figure 11-9 is displayed.
Figure 11-9 DSP tab page
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
439
eSpace EGW1520 Enterprise Gateway
Product Documentation
3.
11 Troubleshooting
Select available codec types and add them to the Selected box.
Step 4 Check the IP Phone gateway configuration. For details about how to configure the IP Phone
gateway, see the IP Phone user manual.
Step 5 If the fault persists, see 11.2.5 Obtaining Technical Support.
----End
11.3.4 CCBS Service Is Unavailable
This topic provides the method to use for troubleshooting when the Call Completion on Busy
Subscriber (CCBS) service is unavailable.
Symptom
The CCBS service is unavailable.
Possible Causes

The CCBS service is disabled.

The CCBS service is enabled for certain prefixes only.

The CCBS service is enabled, but the calling party has enabled the calling line
identification restriction (CLIR) function.

The services that allow users to answer multiple calls simultaneously are disabled on the
IMS or NGN server. These services include multiple call service and call waiting service.
Troubleshooting Procedure
Step 1 Check whether the CCBS service is enabled.
1.
Choose Voice > Service Manager from the navigation tree on the web management
system.
The page shown in Figure 11-10 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
440
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-10 Enabling the service right
2.
Click
The page shown in Figure 11-11 is displayed.
Figure 11-11 Selecting a user
3.
Select the user whose voice services need to be enabled.
4.
Click
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
441
eSpace EGW1520 Enterprise Gateway
Product Documentation
5.
11 Troubleshooting
Select the CCBS service to enable it.
The page shown in Figure 11-12 is displayed.
Figure 11-12 Enabling the CCBS service
Step 2 Check whether the CCBS service is enabled for certain prefixes only and the calling number
starts with a different prefix.
1.
Choose Voice > Service Manager from the navigation tree on the web management
system.
2.
Click the Service Configure tab.
The page shown in Figure 11-13 is displayed.
Figure 11-13 Service Configure tab page
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
442
eSpace EGW1520 Enterprise Gateway
Product Documentation
3.
Click
11 Troubleshooting
The page shown in Figure 11-14 is displayed.
Figure 11-14 Selecting a user
4.
Select the user whose services need to be configured.
5.
Click
The page shown in Figure 11-15 is displayed.
Figure 11-15 Configuring the CCBS service (1)
6.
Click Apply.
The page shown in Figure 11-16 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
443
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-16 Configuring the CCBS service (2)
If you do not specify the value of Number, all users can trigger the CCBS service when
making calls. If you specify the value of Number, only users who have the preset user
number or user number prefix can trigger the CCBS service.
Step 3 Check whether the calling party has enabled the CLIR service. If the calling party has enabled
the CLIR service, the called party cannot call back because the calling number cannot be
obtained. If the calling party is an EGW1520 user, see Calling Line Identity Restriction to
disable the CLIR service.
Step 4 Enable the services that allow users to answer multiple calls simultaneously on the IMS or
NGN server. If the calling party is a user on the IMS or NGN side and the call waiting service
is disabled, the CCBS service is unavailable.
Step 5 If the fault persists after you perform the preceding operations, see Obtaining Huawei
Technical Support.
----End
11.3.5 Failure to Synchronize Data in the UC Mode
This topic provides the method to use for troubleshooting when the EGW1520 cannot
synchronize data in the UC mode.
Symptom
The EGW1520 failed to synchronize data when the UC mode is enabled.
Possible Causes

Network faults occur.

The data synchronization server is configured incorrectly.

EGW1520 synchronization is not configured on the data synchronization server.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
444
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Troubleshooting Procedure
Step 1 Check whether the network is normal.
1.
Check the network connection.
Choose Management > Status from the navigation tree on the web management page.
Click the Network tab. If Status is set to Connected on the Network tab page, the
network connection is normal.
You can also check the Internet indicator. If the indicator is steady on or blinks, the network connection
is normal.
If Status is set to other values, the network connection is abnormal. See Installation to
verify cable connection and 7.2 Connection Modes to verify network connection
configurations.
2.
Check the ADSL or WAN port configuration.
If the EGW1520 uplink mode is ADSL, choose Network > ADSL from the navigation
tree on the web management page, and check the ADSL configuration.
If the EGW1520 uplink mode is WAN, choose Network > WAN from the navigation
tree on the web management page, and check the WAN port configuration.
3.
Ping the data synchronization server from the EGW1520. For details, see 8.4 Pinging IP
Addresses.
If the data synchronization server fails to be pinged, contact the enterprise IT
administrator to check whether the data synchronization server is faulty.
Step 2 Verify that the IP address, port, and synchronization key are correctly configured on the data
synchronization server.
Choose Voice > SIP Server from the navigation tree on the web management page, and check
the port and synchronization key configuration on the data synchronization server.
The synchronization key of the data synchronization server on the EGW1520 side must be the same as
that of the data synchronization server on the enterprise headquarters side.
Step 3 Contact the enterprise IT administrator to check whether EGW1520 synchronization is
configured on the data synchronization server.

If yes, ask the enterprise IT administrator to check whether the EGW1520
synchronization is correctly configured.

If no, ask the enterprise IT administrator to add the EGW1520 synchronization to the
data synchronization server.
Step 4 If the fault persists, see 11.2.5 Obtaining Technical Support.
----End
11.4 Network Faults
Network faults primarily include network port indicator fault and uplink network
disconnection.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
445
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
11.4.1 Network Port Indicator Fault
This topic provides the method to use for troubleshooting when the network port indicator is
off while network cables are connected to the port.
Symptom
The LAN or WAN port indicator is off when network cables are connected to the port.
Possible Causes

The device is powered off.

The network cable is improperly connected to the port.

The network cable is faulty.

The network negotiation fails.
Troubleshooting Procedure
Step 1 Ensure that the EGW1520 is powered on.
Step 2 Ensure that the network cable is properly connected to the port.
Step 3 Check the network cable. Insert the cable into another port. If the indicator is on, the cable is
intact. If the indicator is off, the cable is damaged. In this case, replace the cable.
Step 4 Ensure that the port connected to the EGW1520 is set to auto-negotiation mode. For details
about how to set auto-negotiation mode, see the user manual for the peer device.
Step 5 If the fault persists, see Obtaining Huawei Technical Support.
----End
11.4.2 Failure to Access the IP Network Through ADSL
This topic provides the method to use for troubleshooting when the EGW1520 fails to access
the IP network through the asymmetric digital subscriber line (ADSL).
Symptom
The ADSL is configured, but the EGW1520 fails to access the IP network through the ADSL.
Figure 11-17 and Figure 11-18 show the Network
value of Status is Idle.
Issue 01 (2012-05-15)
pages where the IP address is null and the
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
446
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-17 Network page (null IP address)
Figure 11-18 Network page (idle state)
Possible Causes

The ADSL connection line is damaged.

The ATM interface configuration is inconsistent with the configuration on the Digital
Subscriber Line Access Multiplexer (DSLAM) side.

A static IP address is configured and the Broadband Remote Access Server (BRAS) does
not support static IP addresses.

The Point-to-Point Protocol (PPP) authentication information is inconsistent with the
corresponding information on the BARS side.

The dial on demand function is enabled but no traffic flows through the uplink ADSL.
Troubleshooting Procedure
Step 1 Check the ADSL connection line.
Check the ADSL indicator on the front panel.

If the indicator blinks, ADSL line training is being performed. Wait and re-access the IP
network a few minutes later.

If the indicator is off, ADSL line training fails. Ensure that the phone line is intact and
inserted properly.

If the indicator is steady on, the ADSL connection line is intact and inserted properly.
Step 2 Choose Network > ADSL from the navigation tree on the web management system.
The page shown in Figure 11-19 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
447
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-19 ADSL configuration
Step 3 Ensure that the following configuration on the ADSL ATM interface is consistent with that on
the DSLAM side:

VPI and VCI

DSL latency

Encapsulation mode and service category

DSL Link Type
For the PPPoE service, the value must be set to EoA on the ADSL ATM interface. For
the PPPoA service, the value must be set to PPPoA on the DSL ATM interface.
Step 4 Ensure that the following configuration is consistent between the ADSL service side and the
BRAS side:

Static IP address: If a static IP address is configured on the ADSL service side, check
whether the BRAS supports static IP addresses. If the BRAS does not support static IP
addresses, do not use a static IP address. If the BRAS supports static IP addresses, check
whether the static IP address is within the supported static IP address range.

PPP authentication information, including the PPP user name, password, and
authentication mode (the authentication mode can be set to Auto).

Encapsulation mode and service category.
Step 5 If the dial on demand function is enabled, use a computer that is connected to the EGW1520
to access the Internet so that the traffic flows through uplink ADSL to trigger a network
connection.
Step 6 If the fault persists, see Obtaining Huawei Technical Support.
----End
11.4.3 Failure to Use 3G Data Card to Access a 3G Network
This topic provides the method to use for troubleshooting when the EGW1520 cannot access
a 3G network with a 3G data card.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
448
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Symptom
Although a 3G data card is installed and configured, the EGW1520 cannot access a 3G
network if the ADSL or WAN connection is unavailable.
When Backup Mode is set to Manual, manual operations are required to enable the EGW1520 to
access a 3G network.
Possible Causes
Possible causes are as follows:

Parameter settings are incorrect.

The 3G data card is faulty.

No subscriber identity module (SIM) card is inserted in the 3G data card, or the 3G data
card does not support the SIM card that is inserted.

The SIM card is in arrears.

The SIM card signals are poor.

The data service has not been enabled.

The personal identity number (PIN) lock function is enabled, but the SIM card is locked.
Troubleshooting Procedure
Step 1 Ensure that the model and version of the 3G data card is compatible to the EGW1520. The
EGW1520 supports the following 3G data cards: Huawei ET302 with software version of
11.100.05.00.00, Huawei ET127 with software version of 11.101.01.36.00, Huawei K3765
with software version of 11.126.03.06.00, and Huawei E176G with software version of
11.126.03.02.00.
Step 2 Check the 3G data card indicator.

If the indicator blinks, the 3G data card is connected properly.

If the indicator is off, the physical connection is faulty between the 3G data card and the
EGW1520 USB port. Ensure that the 3G data card is properly inserted and that the card
is intact.
Step 3 Ensure that the SIM card is correctly inserted in the 3G data card.
Step 4 Ensure that the SIM card is in WCDMA mode, it has subscribed to the data service and has a
sufficient account balance. For details, consult the carrier to whom the card belongs.
Step 5 Ensure that the SIM card is unlocked if the PIN lock function is enabled.
To unlock a SIM card, perform the following operations:
1.
Choose Network > 3G from the navigation tree on the web management system.
The page shown in Figure 11-20 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
449
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-20 Entering the PIN code
2.
Enter the PIN code and click
carrier.
. If you forget the PIN code, contact the

It takes about 15 seconds to unlock a SIM card.

The SIM card will be locked by the PIN Unblocking Key (PUK) code if you enter incorrect PIN
codes three consecutive times. When this occurs, contact the carrier.

Disable the PIN lock function if Backup Mode is Auto, so that the EGW1520 can connect to the 3G
network automatically when it is disconnected from the ADSL or WAN port.
Step 6 Verify the 3G parameter values. To obtain the parameter values, contact the carrier. Use the
default values if the carrier does not provide those values.
The page shown in Figure 11-21 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
450
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-21 Verifying 3G parameter settings
Step 7 On the 3G Configuration tab page, view the signal strength. Poor signals may disable the
data service. Relocate the EGW1520 to improve the signal strength.
The page shown in Figure 11-22 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
451
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-22 Viewing the signal strength
Step 8 If the fault persists, see Obtaining Huawei Technical Support.
----End
11.4.4 Failure to Connect to the Wireless Network Client
That Discovers an SSID
This topic provides the method to use for troubleshooting when the EGW1520 fails to connect
to the wireless network client that discovers an SSID.
Symptom
A client discovers an SSID but fails to associate with the EGW1520 after you enter
authentication information.
Possible Causes

The authentication information is incorrect.

The client and server use different authentication modes.

The MAC address of the client is filtered out by the blacklist or whitelist configured on
the server.
Troubleshooting Procedure
Step 1 Verify that you have entered the same authentication information (such as the WPS key) as
that you have configured on the server.
Step 2 Ensure that the client and server use the same authentication mode.
Step 3 Check the settings of MAC Filter on the EGW1520. In the blacklist, add the MAC addresses
of clients that are not allowed to connect to the EGW1520. In the whitelist, add the MAC
addresses of clients that are allowed to connect to the EGW1520.
Step 4 If the fault persists, see 11.2.5 Obtaining Technical Support.
----End
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
452
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
11.4.5 Failure to Restrict the File Transfer Rate When
Configuring QoS Policies
This topic provides the method to use for troubleshooting when users fail to restrict the file
transfer rate when configuring QoS policies.
Symptom
Users fail to restrict the file transfer rate when configuring QoS policies.
Possible Causes

The action interface is not enabled.

An incorrect traffic classification or action interface is selected.

Required parameters are not set or are incorrectly set.
Troubleshooting Procedure
Step 1 Check whether the indicator blinks on the action interface such as the WAN interface. If the
indicator blinks, the action interface is enabled. Ensure that network parameters are set
correctly. For example, WAN or ADSL connections are correctly added on the web
management page.
Step 2 Verify that the traffic classification and action interfaces are valid.
The selected interface must be a physical interface such as eth-wan, eth-lan, wl0, or atm, not a
logical interface such as WAN, LAN, or Local. In addition, traffic classification and action
interfaces must be different. If the traffic classification interface is eth-lan, the action interface
is eth-wan or atm.
The page shown in Figure 11-23 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
453
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-23 QoS traffic classification and action interfaces
Step 3 Set Ether Type to IP (0x800) and configure the correct source or destination IP address. If
the source or destination IP address is a QoS policy, do not configure the MAC address.
Step 4 If the fault persists, see 11.2.5 Obtaining Technical Support.
----End
11.4.6 Some Normal Data Packets Are Lost After the Flood
Attack Defense Function Is Enabled
This topic provides the method to use for troubleshooting when some normal data packets are
lost after the flood attack defense function is enabled.
Symptom
After the flood attack defense function is enabled, some normal data packets are discarded.
Possible Causes
In the configuration of the flood attack defense function, the upper threshold of the data
transmission rate is smaller than that is supported so that some normal data packets are
discarded.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
454
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Troubleshooting Procedure
Step 1 Set the upper threshold of the data transmission rate to a value larger than that is supported. If
the supported data transmission rate value is larger than the upper threshold value for a flood
attack defense type, for example, 50 for ICMP flood attack defense and 1000 for SYN and
UDP flood attack defense, disable flood attack defense for this type of data packets.
The page shown in Figure 11-24 is displayed.
Figure 11-24 Configuring the flood attack defense
Step 2 If the fault persists, see 11.2.5 Obtaining Technical Support.
----End
11.4.7 Signals Cannot Be Transmitted Through a VPN
Tunnel
This topic provides the method to use for troubleshooting when signals cannot be transmitted
through a VPN tunnel.
Symptom
The VPN tunnel is set up successfully while signals cannot be transmitted through it. For
example, PC1 and PC2 cannot communicate, as shown in Figure 11-25.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
455
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-25 Typical network
Possible Causes
No route is configured between PCs.
Troubleshooting Procedure
Step 1 Check for the route between the PCs and add a route when necessary. For example, run the
route add 192.168.20.0 mask 255.255.255.0 192.168.30.1 command to add a route from PC1
to PC2, as shown in Figure 11-25.
Step 2 If the fault persists, see 11.2.5 Obtaining Technical Support.
----End
11.4.8 IKE Negotiation Failure in the VPN Tunnel
This topic provides the method to use for troubleshooting when IKE negotiation fails in the
VPN tunnel so that VPN servers at both ends of the VPV tunnel cannot set up a connection.
Symptom
The VPN server at one end of the VPN tunnel has the IKE negotiation information at the first
stage, while the VPN server at the other end does not.
Possible Causes
The VPN server at one end of the VPN tunnel has saved the IKE negotiation information at
the first stage during the previous IKE negotiation.
Troubleshooting Procedure
Step 1 Clear the IKE negotiation information from VPN servers at both ends and verify that both
servers negotiate from the first stage.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
456
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Choose VPN > IPSec Info on the EGW1520. The IPSec Info page is displayed. Click Clear
SPI to clear the IKE negotiation information from VPN servers at both ends.
Step 2 If the fault persists, see 11.2.5 Obtaining Technical Support.
----End
11.5 System Faults
System faults mainly include web management system fault and failure to obtain the system
time from the NTP server.
11.5.1 Failing to Log In to the Web Management System
Using HTTPS
This topic provides the method to use for troubleshooting when users cannot log in to the web
management system by using the Hypertext Transfer Protocol Secure (HTTPS).
Symptom
When a user logs in to the web management system by HTTPS, Internet Explorer (IE) does
not respond for a long time or displays a warning message indicating a certificate error.
Possible Causes

The network connection between the computer (that is, the maintenance terminal) and
the EGW1520 is abnormal.

The IE on the computer is faulty.
Troubleshooting Procedure
Step 1 Check the network port indicator. The network connection is faulty if the indicator is off. To
rectify the fault, see 11.4.1 Network Port Indicator Fault.
Step 2 Ensure that the IP addresses (192.168.1.1 by default) of the computer and the EGW1520 are
on the same network segment. For example, if the IP address of the EGW1520 is 192.168.1.1,
set the IP address of the computer to 192.168.1.x. The value of x ranges from 2 to 254.
Step 3 Check the IE on the computer. The EGW1520 supports only IE 6.0 version or a later version
and does not support proxy servers.
If you use IE 7.0, login in HTTPS mode takes a long time.
Step 4 Verify that you have accepted the EGW1520 security certificate.
If you use IE 6.0, click Yes to continue when logging in in HTTPS mode.
The page shown in Figure 11-26 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
457
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-26 Using IE 6.0 to log in
If you use IE 7.0 or a later version, click Continue to this website (not recommended). to
continue when logging in in HTTPS mode.
The page shown in Figure 11-27 is displayed.
Figure 11-27 Using IE 7.0 or a later version to log in
Step 5 If the fault persists after you perform the preceding operations, see Obtaining Huawei
Technical Support.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
458
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
----End
11.5.2 Web Login Page Is Displayed Whatever Button or Link
Users Click on a Page
This topic provides the method to use for troubleshooting when the system always displays
the login page whenever a user clicks a button or link on a page.
Symptom
The system always displays the login page no matter what button or link a user clicks on a
page.
If you do not perform an operation within ten minutes after logging in to the web management system,
the system locks the page and requires re-login to ensure security.
Possible Causes

The Internet Explorer (IE) settings are incorrect on the maintenance terminal.

The cache of the IE on the maintenance terminal is faulty.
Troubleshooting Procedure
Step 1 Check the IE settings on the maintenance terminal.
1.
Start the IE, and choose tools > Internet Options.
The page shown in Figure 11-28 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
459
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-28 Checking the IE settings on the maintenance terminal (1)
2.
Click Settings.
The page shown in Figure 11-29 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
460
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-29 Checking the IE settings on the maintenance terminal (2)
3.
Select Check on every visit to the page or Auto (Auto indicates that the EGW1520
web management system determines whether to detect a later version of Web pages).
Step 2 If the fault persists, delete the cache data and history records.
The page shown in Figure 11-30 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
461
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-30 Deleting the cache data and history records
Step 3 If the fault persists, see Obtaining Huawei Technical Support.
----End
11.5.3 An Error Message Is Displayed or No Response Is
Received When Users Click a Button or Link on a Page
This topic provides the method to use if an error message is displayed or no response is
received when users click a button or link on a Web page.
Symptom
When a user clicks a button or link on a page, the system displays an error message or does
not return a response.
Possible Causes

The network connection between the maintenance terminal and the EGW1520 is
abnormal or the network quality is poor.

The IE settings are incorrect.

The IE cache contains error files.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
462
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Troubleshooting Procedure
Step 1 Check the network port indicator. A network fault occurs if the indicator is off. To rectify the
fault, see 11.4.1 Network Port Indicator Fault.
Step 2 Click
in IE or press Ctrl+F5 to forcibly refresh the page.
Step 3 Check the IE settings on the maintenance terminal.
1.
Start the IE, and choose tools > Internet Options.
The page shown in Figure 11-31 is displayed.
Figure 11-31 Checking the IE settings on the maintenance terminal (1)
2.
Click Settings.
The page shown in Figure 11-32 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
463
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-32 Checking the IE settings on the maintenance terminal (2)
3.
Select Check on every visit to the page or Auto (Auto indicates that the EGW1520
web management system determines whether to detect a later version of Web pages).
Step 4 If the fault persists, delete the cache data and history records.
The page shown in Figure 11-33 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
464
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-33 Deleting the cache data and history records
Step 5 If the fault persists, see Obtaining Huawei Technical Support.
----End
11.5.4 Word Display Is Incomplete or the System Does Not
Respond After You Click a Button
This topic provides the method to use for troubleshooting when word display is incomplete or
the system does not respond after you click a button.
Symptom
Word display is incomplete, the system does not respond after you click a button, or the word
"undefined" is displayed after you click a button.
Possible Causes

A browser different from Internet Explorer is used.

The Internet Explorer version is earlier than 6.0.

The UI file has been updated after version upgrade, while the browser uses the old UI
file in the cache.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
465
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Troubleshooting Procedure
Step 1 Ensure that the Internet Explorer version is 6.0 or later.
Step 2 Open Internet Explorer and choose Tools > Internet Options > General. Clear files and
historical records about the URL from the browser cache.
The page shown in Figure 11-34 is displayed.
Figure 11-34 Clearing the Internet Explorer cache and historical data
Step 3 (Optional) Press Ctrl+F5 to refresh the UI.
Step 4 If the fault persists, see 11.2.5 Obtaining Technical Support.
----End
11.5.5 The IE Displays an Error Message When Multiple User
Data Records Are Configured Simultaneously
This topic provides the method to use for troubleshooting when the IE displays an error
message when multiple user data records are configured simultaneously.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
466
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Symptom
The IE displays an error message when multiple user data records are configured
simultaneously.
Figure 11-35 shows the error message.
Figure 11-35 Error message displayed by the IE
Possible Causes

The version of the IE is earlier than 6.0.

The memory of the PC is insufficient.

IE files on the PC are damaged.
Troubleshooting Procedure
Step 1 Open IE, and choose Help > About Internet Explorer to view the version of the IE.
The page shown in Figure 11-36 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
467
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-36 Viewing the IE version
The EGW1520 requires IE 6.0 or a later version. If your IE version is earlier than 6.0, go to
www.microsoft.com to upgrade it.
Step 2 Stop other running applications on your PC to free up memory space, and configure data
again.
Step 3 If the fault persists, delete temporary Internet files from the cache of your IE.
The page shown in Figure 11-37 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
468
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting
Figure 11-37 Deleting temporary Internet files
Step 4 If the fault persists, restart your PC.
Step 5 If the fault still persists, uninstall your IE, and go to www.microsoft.com to download IE 6.0
or a later version and install it.
Step 6 If the fault persists, see Obtaining Huawei Technical Support.
----End
11.5.6 System Time Cannot Be Obtained from the NTP
Server or the Obtained Time Is Incorrect
This topic provides the method to use for troubleshooting when system time cannot be
obtained from the NTP server or the time obtained is incorrect.
Symptom
System time cannot be obtained from the NTP server or the time obtained is incorrect.
Possible Causes
Possible causes are as follows:
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
469
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting

The uplink network connection is abnormal.

The NTP server is unreachable.

The time zone or Daylight Saving Time (DST) configuration is incorrect.
Troubleshooting Procedure
Step 1 Check the synchronization status of the NTP server.
Choose Management > Date & Time from the navigation tree on the web management
system.
Click the NTP Server tab.
The page shown in Figure 11-38 is displayed.
Figure 11-38 Checking the synchronization status of the NTP server

If Synchronization Status is Unsynchronized, go to 2 and 3.

If Synchronization Status is Synchronized, go to 4.
Step 2 Check the network connection.
Check the network connection in either of the following ways:

Issue 01 (2012-05-15)
Check whether the Internet indicator is on. If the indicator is on or blinks, the EGW1520
has been registered with the network service provider and the network connection is
normal.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
470
eSpace EGW1520 Enterprise Gateway
Product Documentation

11 Troubleshooting
Choose Management > Status from the navigation tree on the web management
system,click the Network tab. If the value of Status is Connected on the Network page,
the network connection is normal.
If the network connection is abnormal, see Installation to verify the cable connections and 7.2
Connection Modes to verify the network configuration.
Step 3 Check whether the NTP server is reachable.
Run the ping command to check whether the NTP server is reachable. For example, enter
ping time.nist.gov on the computer connected to the EGW1520. If this web site can be
pinged, the NTP server is reachable. If the ping command fails, the NTP server is unreachable.
Use another NTP server.
Step 4 Verify that the EGW1520 time zone and DST are configured correctly.
Choose Management > Date & Time from the navigation tree on the web management
system.
The page shown in Figure 11-39 is displayed.
Figure 11-39 Checking the time zone and DST configuration
Step 5 If the fault persists, see Obtaining Huawei Technical Support.
----End
11.5.7 Failing to Restore Factory Settings by Pressing RESET
This topic provides the method to use for troubleshooting when the factory settings cannot be
restored after the RESET button is pressed.
Symptom
The factory settings are not restored on the EGW1520 after a user presses the RESET button.
Possible Causes
Possible causes are as follows:
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
471
eSpace EGW1520 Enterprise Gateway
Product Documentation
11 Troubleshooting

The user holds the RESET button for less than six seconds. To restore the factory
settings, the RESET button must be held for at least six seconds.

The user does not hold the RESET button stably.
Troubleshooting Procedure
Step 1 Press and hold the RESET button for six seconds.
Step 2 If the fault persists after you perform the preceding operations, see Obtaining Huawei
Technical Support.
----End
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
472
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
12
Reference
About This Chapter
Web_Parameters_Reference
12.1 TR-069 Parameter Reference
This topic describes user-defined TR-069 parameters on the EGW1520.
12.2 Security Log Information
This topic describes the security log information displayed on the security log page.
12.3
Customizing Voice Prompts for the Switchboard
This topic describes how to customize voice prompts for the switchboard. Before delivery, the
EGW1520 is loaded with switchboard voice prompts by default.
12.1 TR-069 Parameter Reference
This topic describes user-defined TR-069 parameters on the EGW1520.

Table 12-1 lists the user-defined TR-069 parameters on the EGW1520. For details about
other TR-069 parameters, see TR-069.

In Writable, W represents Write.

In Default Value, false represents 0 and true represents 1.
Table 12-1 TR-069 Parameter
Parameter
Type
Writable
Description
Default Value
InternetGatewa
yDevice.Device
Info.
object
X_CPE_SwBui
string
Time when the
software was

Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
473
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
ldTimestamp
Description
Default Value
built.
X_CPE_DslPhy
DrvVersion
string
Version
number of the
Digital
subscriber line
(DSL) physical
layer (PHY)
and Driver.

X_CPE_VoiceS
erviceVersion
string
Version
number of the
voice software.

InternetGatewa
yDevice.X_CP
E_SyslogCfg.
object
Syslog
configuration
file.
Status
string
Indicates
whether the
Syslog is
enabled.
Disabled
Option
string
Path for storing
exported
syslogs. The
values are local
buffer, remote,
and local
buffer and
remote.
local buffer
LocalLogLevel
string
Log level. The
values are
emergency,
alert, critical,
error,
warning,
notice,
informational,
and debug.
Error
ServerIPAddres
string
IP address of
the remote
syslog server.
This parameter
is valid only if
Option is set to
remote, local
buffer and
remote, or
local file and
remote.
0.0.0.0
ServerPortNum
unsignedInt[1:6
Port of the
514
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
474
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
Parameter
Type
Writable
Description
Default Value
ber
5535]
InternetGatewa
yDevice.Manag
ementServer.
object
X_CPE_Bound
IfName
string
WAN port that
TR-069 uses,
for example,
nas_0_35. This
parameter can
be set to
Any_WAN and
LAN. The
value
Any_WAN
indicates that
TR-069 will
use any WAN
connections.
The value LAN
indicates that
TR-069 will
use the default
LAN subnet
br0. Developers
who have no
WAN
connection use
the value LAN.
Any_WAN
remote syslog
server.
The values are
Any_WAN and
LAN.
InternetGatewa
yDevice.Time.
object
X_CPE_NTPSy
ncInterval
unsignedInt[30
0:604800]
Interval for
synchronizing
time with the
NTP server.
7200
X_CPE_NTPA
uthenType
string
Authentication
type during
time
synchronization
of the NTP
server. The
values are
no-Auth,
DES_Standard
DES_NTP_Sta
no-Auth
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
475
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
ndard,
DES_ASCII,
and MD5.
X_CPE_NTPA
uthenKeyid
unsignedInt[1:6
5535]
ID of the NTP
server
authentication
key.
X_CPE_NTPA
uthenKey
string(64)
NTP server
authentication
key. When
X_CPE_NTPA
uthenType is
set to
DES_Standard
and DES_NTP
Standard, the
key is a string
of 16 bytes that
are internally
converted to an
8-byte
hexadecimal
value. When
X_CPE_NTPA
uthenType is
set to DES
ASCII, the key
is an ASCII
string of 1-8
bytes. When
X_CPE_NTPA
uthenType is
set to MD5, the
key is a string
of 1-64 bytes.

InternetGatewa
yDevice.WAN
Device.{i}.WA
NCommonInter
faceConfig.
object
X_CPE_TxErro
rs
unsignedInt
Total number
of errors
transmitted by a
port.
X_CPE_RxErro
rs
unsignedInt
Total number
of errors
received by a
port.
X_CPE_TxDro
unsignedInt
Total number
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
476
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
ps
Description
Default Value
of dropped
packets
transmitted by a
port.
X_CPE_RxDro
ps
unsignedInt
Total number
of dropped
packets
received by a
port.
InternetGatewa
yDevice.WAN
Device.{i}.X_C
PE_XTM_Inter
face_Stats.{i}.
object
This object
contains the
statistics on the
xTM
(ATM/PTM)
port. This
object is used
to replace
X_CPE_ATM
_Interface_Sta
ts, which is
outdated.
Port
unsignedInt
Port number.
Status
string
Port status. The
values are
Enable and
Disable.
Disabled
InOctets
unsignedInt
Number of
bytes received
by a port.
OutOctets
unsignedInt
Number of
bytes
transmitted by a
port.
InPackets
unsignedInt
Number of
AAL5, AAL0,
and PTM
packets
received by a
port.
OutPackets
unsignedInt
Number of
AAL5, AAL0,
and PTM
packets
transmitted by a
port.
InOAMCells
unsignedInt
Number of
ATM, OAM,
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
477
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
and RM cells
received by a
port.
OutOAMCells
unsignedInt
Number of
ATM, OAM,
and RM cells
transmitted by a
port.
InASMCells
unsignedInt
Number of
ATM, Bonding,
and ASM cells
received by a
port.
OutASMCells
unsignedInt
Number of
ATM, Bonding,
and ASM cells
transmitted by a
port.
InPacketErrors
unsignedInt
Number of
error packets
received by a
port.
InCellErrors
unsignedInt
Number of
error cells
received by a
port.
InternetGatewa
yDevice.WAN
Device.{i}.WA
NDSLInterface
Config.
object
X_CPE_AdslM
odulationCfg
string
Modulation
mode. The
supported
values are
ADSL_G.dmt,
ADSL_G.lite,
ADSL_G.dmt.
bis,
ADSL_re-adsl,
ADSL_2plus,
and
ADSL_ANSI_
T1.413.
ADSL_Modulat
ion_All
Note: 1. The
ADSL_re-adsl
parameter takes
effect only
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
478
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
when it is set
together with
other
parameters. 2.
When the
ADSL_Modul
ation_All
parameter is
set, other
parameters do
not need to be
set. 3. The
following
parameters can
be combined
with a comma
(,):
ADSL_G.dmt,
ADSL_2plus,
ADSL_ANSI_
T1.413, and
ADSL_G.dmt.b
is.
X_CPE_Phone
LinePair
string
Inner pair or
outer pair.
Inner Pair
X_CPE_Bitswa
string
Indicates
whether the bit
swap function
is enabled.
On
X_CPE_SRA
string
Indicates
whether the
seamless rate
adaptation
function is
enabled.
Off
X_CPE_LinkPo
werState
string
Current link
power state.
The values are
L0 (indicating
steady on), L2
(indicating low
power), and L3
(indicating
idle).
L3
InternetGatewa
yDevice.WAN
Device.{i}.WA
NDSLInterface
Config.Stats.To
object
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
479
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
X_CPE_RxRsC
orrectable
unsignedInt
Total number
of correctable
errors received
by RS.
X_CPE_RxRsC
orrectable_2
unsignedInt
Total number
of correctable
errors received
by RS.
X_CPE_TxRsC
orrectable
unsignedInt
Total number
of correctable
errors
transmitted by
RS.
X_CPE_TxRsC
orrectable_2
unsignedInt
Total number
of correctable
errors
transmitted by
RS.
X_CPE_TxRsU
ncorrectable
unsignedInt
Total number
of
uncorrectable
errors
transmitted by
RS.
X_CPE_TxRsU
ncorrectable_2
unsignedInt
Total number
of
uncorrectable
errors
transmitted by
RS.
X_CPE_RxRsU
ncorrectable
unsignedInt
Total number
of
uncorrectable
errors received
by RS.
X_CPE_RxRsU
ncorrectable_2
unsignedInt
Total number
of
uncorrectable
errors received
by RS.
X_CPE_TxRs
Words
unsignedInt
Total number
of words
transmitted by
RS.
X_CPE_TxRs
unsignedInt
Total number
tal.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
480
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Words_2
Description
Default Value
of words
transmitted by
RS.
X_CPE_RxRs
Words
unsignedInt
Total number
of words
received by RS.
X_CPE_RxRs
Words_2
unsignedInt
Total number
of words
received by RS.
X_CPE_Receiv
eBlocks_2
unsignedInt
Total number
of received
blocks.
X_CPE_Trans
mitBlocks_2
unsignedInt
Total number
of transmitted
blocks.
X_CPE_ATUC
FECErrors_2
unsignedInt
Total number
of FEC errors
detected by the
ATU-C.
FEC-CFE is
defined in
ITU-T Rec.
G.997.1.
X_CPE_HECEr
rors_2
unsignedInt
Total number
of detected
HEC errors.
HEC-P is
defined in
ITU-T Rec.
G.997.1.
X_CPE_ATUC
HECErrors_2
unsignedInt
Total number
of HEC errors
detected by the
ATU-C.
HEC-PFE is
defined in
ITU-T Rec.
G.997.1.
X_CPE_Upstre
amUas
unsignedInt
Upstream UAS
counter.
X_CPE_Downs
treamUas
unsignedInt
Downstream
UAS counter.
X_CPE_Upstre
amEs
unsignedInt
Upstream error
rate.
X_CPE_Upstre
unsignedInt
Upstream sever
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
481
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
amSes
Description
Default Value
error rate.
X_CPE_Upstre
amBitErrors
unsignedInt
Upstream bit
error.
X_CPE_Upstre
amBitErrors_2
unsignedInt
Upstream bit
error.
X_CPE_Downs
treamBitErrors
unsignedInt
Downstream bit
error.
X_CPE_Downs
treamBitErrors_
unsignedInt
Downstream bit
error.
X_CPE_Upstre
amDataCells
unsignedInt
Upstream data
cell.
X_CPE_Upstre
amDataCells_2
unsignedInt
Upstream data
cell.
X_CPE_Downs
treamDataCells
unsignedInt
Total
downstream
data cell.
X_CPE_Downs
treamDataCells
_2
unsignedInt
Total
downstream
data cell.
X_CPE_Upstre
amTotalCells
unsignedInt
Total upstream
cell.
X_CPE_Upstre
amTotalCells_2
unsignedInt
Total upstream
cell.
X_CPE_Downs
treamTotalCells
unsignedInt
Total
downstream
cell.
X_CPE_Downs
treamTotalCells
_2
unsignedInt
Total
downstream
cells.
X_CPE_Upstre
amLCD
unsignedInt
Upstream LCD.
X_CPE_Upstre
amLCD_2
unsignedInt
Upstream LCD.
X_CPE_Downs
treamLCD
unsignedInt
Downstream
LCD.
X_CPE_Downs
treamLCD_2
unsignedInt
Downstream
LCD.
X_CPE_Upstre
amOCD
unsignedInt
Upstream
OCD.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
482
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
Parameter
Type
Writable
Description
Default Value
X_CPE_Upstre
amOCD_2
unsignedInt
Upstream
OCD.
X_CPE_Downs
treamOCD
unsignedInt
Downstream
OCD.
X_CPE_Downs
treamOCD_2
unsignedInt
Downstream
OCD.
InternetGatewa
yDevice.WAN
Device.{i}.WA
NEthernetInterf
aceConfig.
object
X_CPE_IfNam
string(32)
Linux port
name, for
example, eth0,
eth1, eth1.2,
and eth1.3.

InternetGatewa
yDevice.WAN
Device.{i}.WA
NConnectionDe
vice.{i}.WAND
SLLinkConfig.
object
X_CPE_ATM
MinimumCellR
ate
unsignedInt
Number of
errors detected
during header
error check at
the ATM layer.
X_CPE_Schedu
lerAlgorithm
string
Scheduling
algorithm.
SP
X_CPE_ATMS
tatus
string
ATM status.

X_CPE_MacA
ddress
string(17)
MAC address
of the PVC
port. This
parameter is
used in the
PPPoE, bridge,
and MER
modes.

X_CPE_IfNam
string
Port name.

InternetGatewa
yDevice.WAN
Device.{i}.WA
NConnectionDe
object
ATM
initialization
parameters.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
483
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
ATMFreeCellQ
Size
unsignedInt
Length of the
free ATM cell
queue.
ATMFreePacke
tQSize
unsignedInt
Length of a free
ATM packet
queue.
ATMFreePacke
tQBufferSize
unsignedInt
Length of a free
ATM packet
queue in the
buffer.
ATMFreePacke
tQBufferOffset
unsignedInt
Offset of a free
ATM packet
queue in the
buffer.
ATMReceiveC
ellQSize
unsignedInt
Length of the
queue of cells
received by the
ATM.
ATMReceivePa
cketQSize
unsignedInt
Length of the
queue of cells
received by the
ATM.
ATMTransmitF
ifoPriority
unsignedInt
FIFO priority in
ATM
transmission.
ATMAal5Cpcs
MaxSduLength
unsignedInt
Maximum SDU
length of ATM
AAL5 CPCS.
ATMAal2Sscs
MaxSsarSduLe
ngth
unsignedInt
Maximum SDU
length of ATM
AAL2 CPCS.
InternetGatewa
yDevice.WAN
Device.{i}.WA
NConnectionDe
vice.{i}.X_CPE
_WANUSB.
object
WANUSB
configurations.
IfName
string(32)
Port name.
ppp0
ManulDialFlag
boolean
Dialing mode.
The values are
true (Manual)
false
vice.{i}.WAND
SLLinkConfig.
X_CPE_ATM_
PARMS.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
484
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
and false
(Auto).
ConnectStatus
int[0:4]
Connection
status. The
values are
Connecting,
Connected,
and
Disconnected.
SIMPIN
string(32)
PIN code of a
SIM card.
1234
SimPinLockEn
able
boolean
Indicates
whether to
enable the
system to use
the PIN code to
lock the SIM
card.
false
DialStringTD
string(32)
APNTD
string(32)
DailMethod
int[0:2]
Dialing mode.
SimCardState
int[0:5]
SIM card
status. The
values are 0
(ready), 1 (no
device), 2 (PIN
required), 3
(PUK
required), and 4
(internal error).
ISP
string(64)
Network
carrier.
vodafone
SigIntensity
int[0:99]
Signal
intensity. The
values are 0 to
5. The value 0
indicates no
signal.
localIP
string(32)
Local IP
address.
0.0.0.0
DNS
string(64)
IP address of
the domain
name server
(DNS).
0.0.0.0
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
485
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
Parameter
Type
Writable
Description
Default Value
PrimaryDNS
string(32)
IP address of
the active DNS.
0.0.0.0
SecondDNS
string(32)
IP address of
the standby
DNS.
0.0.0.0
IMEI
string(32)
International
mobile
equipment
identity (IMEI).
NoDataCard
ConDuration
unsignedInt
Connection
duration.
SYSMODE
string
System mode.
No Service
InternetGatewa
yDevice.WAN
Device.{i}.WA
NConnectionDe
vice.{i}.WANI
PConnection.{i
}.
object
X_CPE_IfNam
string
Port name.
X_CPE_Op42N
TPSrv
string(128)
Option 42. IP
address of the
NTP server.
The value
format is
IP1,IP2.

X_CPE_Op43V
SI
string(256)
Option 43.
Specific vendor
information.
The value is a
string.

X_CPE_Op66T
FTPSrvName
string(256)
Option 66.
TFTP server
name. The
value is a
string.

X_CPE_Op67B
ootfile
string(256)
Option 67.
Boot file name.
The value is a
string.

X_CPE_Op120
SIPSrv
string(256)
Option 120.
SIP server. The
value format
complies with

Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
486
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
RFC3361.
X_CPE_Op150
TFTPSrvIP
string(256)
Option 150. IP
address of the
TFTP server.
The value
format is
IP1,IP2.

InternetGatewa
yDevice.WAN
Device.{i}.WA
NConnectionDe
vice.{i}.WANI
PConnection.{i
}.Stats.
object
X_CPE_RxDro
ps
unsignedInt
Total number
of received
packets that are
dropped during
a connection.
X_CPE_TxDro
ps
unsignedInt
Total number
of transmitted
packets that are
dropped during
a connection.
X_CPE_RxErro
rs
unsignedInt
Total number
of received
errors.
X_CPE_TxErro
rs
unsignedInt
Total number
of transmitted
errors.
InternetGatewa
yDevice.WAN
Device.{i}.WA
NConnectionDe
vice.{i}.WANP
PPConnection.{
i}.
object
X_CPE_Conne
ctionEstablishe
dTime
unsignedInt
Duration for
establishing
PPP
connections.
X_CPE_IfNam
string
Port name.
X_CPE_Defaul
tGateway
string
Default
gateway for the
WAN port.

Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
487
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
The
PPPoE/PPPoA
WAN gateway
is used only in
the MDM
mode.
InternetGatewa
yDevice.WAN
Device.{i}.WA
NConnectionDe
vice.{i}.WANP
PPConnection.{
i}.Stats.
object
X_CPE_RxDro
ps
unsignedInt
Total number
of received
packets that are
dropped during
a connection.
X_CPE_TxDro
ps
unsignedInt
Total number
of transmitted
packets that are
dropped during
a connection.
X_CPE_RxErro
rs
unsignedInt
Total number
of received
errors.
X_CPE_TxErro
rs
unsignedInt
Total number
of transmitted
errors.
InternetGatewa
yDevice.Servic
es.VoiceService
.{i}.
object
X_CPE_SipMi
nExpire
unsignedInt[30:
65535]
Minimum
timeout
duration for the
local SIP user
to send a
registration
request to
EGW1520.
120
X_CPE_SipMa
xExpire
unsignedInt[30:
65535]
Maximum
timeout
duration for the
local SIP user
to send a
registration
3600
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
488
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
request to
EGW1520.
X_CPE_Sessio
nTimerStart
boolean
Indicates
whether to
enable the SIP
session timer.
false
X_CPE_Sessio
nTimerInterval
unsignedInt[90:
65535]
Session
interval.
1800
X_CPE_Sessio
nTimerMinInter
val
unsignedInt[90:
65535]
Minimum
session interval.
90
X_CPE_MinSu
bExpires
unsignedInt[12
0:3600]
Minimum
timeout
duration for the
local SIP user
to send a
subscription
request to
EGW1520.
120
X_CPE_DefSu
bExpires
unsignedInt[12
0:3600]
Default timeout
duration for
EGW1520 to
send a
subscription
request to the
upper-level
device.
360
X_CPE_MaxSu
bExpires
unsignedInt[12
0:3600]
Maximum
timeout
duration for the
local SIP user
to send a
subscription
request to
EGW1520.
3600
InternetGatewa
yDevice.Servic
es.VoiceService
.{i}.Capabilities
object
X_CPE_MaxRe
gGroupCount
unsignedInt
Maximum
number of
X_CPE_IMS_
RegGroup
groups that are
supported.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
489
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
Parameter
Type
Writable
Description
Default Value
InternetGatewa
yDevice.Servic
es.VoiceService
.{i}.Capabilities
.Codecs.{i}.
object
X_CPE_PTime
Default
unsignedInt
Packing
duration.
20
InternetGatewa
yDevice.Servic
es.VoiceService
.{i}.Capabilities
.X_CPE_Codec
s_Ext.
object
EcEnable
boolean
Indicates
whether to
enable the echo
suppression.
true
SilenceSuppreE
nable
boolean
Indicates
whether to
enable the
silence
suppression.
true
CodecList
string(64)
DSP codec
type. A device
can be
configured with
multiple codec
types. The local
device
preferentially
selects the first
type to
negotiate with
the peer device.
The priorities
are in
descending
order. The
values are
G711A,
G711U,
G729A/B,
G726, and
G722.
G711A,G711U,
G729A/B,G726,
G722
RecvGain
int[-96:32]
Receiving gain.
-2
SendGain
int[-96:32]
Transmission
gain.
-8
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
490
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
Parameter
Type
Writable
Description
Default Value
MediaNegMod
string
Media
negotiation
mode. The
values are
RemotePri and
LocalPri.
RemotePri
VBDAlgo
string
Codec type
used in fax
transparent
transmission.
The values are
G711A and
G711U.
G711A
FaxPriorMode
string
Fax
transmission
mode. The
values are
VBD_T38,
T38_VBD,
T38, and VBD.
VBD_T38
InternetGatewa
yDevice.Servic
es.VoiceService
.{i}.VoiceProfil
e.{i}.
object
X_CPE_Numbe
rOfRegGroup
unsignedInt
Number of
X_CPE_IMS_
RegGroup
groups in a
voice file.
InternetGatewa
yDevice.Servic
es.VoiceService
.{i}.VoiceProfil
e.{i}.X_CPE_I
MS_RegGroup.
{i}.
object
Registration
group of a SIP
user.
X_CPE_RegId
unsignedInt
ID of the
registration
group of a SIP
or POTS user.
4294967295
X_CPE_Regist
erType
string
Registration
type. The
values are
Single, Group,
and Wildcard.
The value
single indicates
Single
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
491
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
that a
registration
groups can only
have one user.
The value
Group
indicates that
multiple users
can be in a
registration
group. The
value
Wildcard
indicates that
the users in a
registration
group register
with the IMS or
NGN network
based on
certain rules
provided by the
network carrier.
X_CPE_AuthT
ype
string
Mode for
authenticating a
SIP user when
registering with
EGW1520.
This parameter
value must be
the same as that
specified on the
SIP user's
terminal. The
values are
NoAuth,
AuthByMD5,
AuthByMD5S
ess, and
AuthByHW.
NoAuth
X_CPE_IMSI
MPIInfo
string(130)
SIP trunk ID
when a
registration
group registers
with the IMS or
NGN network,
which is
provided by the
network carrier.
This parameter
is mandatory.

Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
492
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
Parameter
Type
Writable
Description
Default Value
X_CPE_IMSI
MPUInfo
string(257)
SIP trunk name
when a
registration
group registers
with the IMS or
NGN network,
which is
provided by the
network carrier.

X_CPE_AuthP
WD
string(130)
Password for
authenticating
the registration
group when
registering with
the IMS or
NGN network,
which is
provided by the
network carrier.

X_CPE_IMSD
omainName
string(255)
Domain name
of the IMS
network that a
registration
group is to be
registered with,
which is
provided by the
network carrier.
This parameter
value must be a
valid domain
name.

InternetGatewa
yDevice.Servic
es.VoiceService
.{i}.VoiceProfil
e.{i}.SIP.
object
X_CPE_IfDom
ain
boolean
false
X_CPE_Server
Type
string
NGN_Server
X_CPE_IfSrv
boolean
false
X_CPE_Option
sInterval
unsignedInt[10:
900]
Interval for
switching
between the
master node
and the slave
node.
60
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
493
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
Parameter
Type
Writable
Description
Default Value
X_CPE_IfChan
geToMaster
boolean
Indicates
whether to
enable the
switching
between the
master node
and the slave
node.
false
InternetGatewa
yDevice.Servic
es.VoiceService
.{i}.VoiceProfil
e.{i}.SIP.X_CP
E_BackupServe
r.
object
ProxyServer
string(255)
Proxy server.
This parameter
value must be
the same as the
value of
RegistrarServe
r.

ProxyServerPor
unsignedInt[10
24:65535]
Port number of
the SIP server,
which is
provided by the
network carrier.
This parameter
value must be
the same as the
value of
RegistrarServe
rPort.
5060
RegisterExpires
unsignedInt[0:1
4400]
Interval for a
registration
group user to
send
registration
requests to the
SIP server, in
seconds.
360
X_CPE_IfDom
ain
boolean
false
RegistrarServer
string(255)
IP address or
DNS name of
the SIP server,
which is
provided by the

Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
494
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
network carrier.
RegistrarServer
Port
unsignedInt[10
24:65535]
5060
X_CPE_Server
Type
string
SIP server type.
The values are
NGN_Server
and
NGN_Server.
NGN_Server
X_CPE_IfSrv
boolean
false
InternetGatewa
yDevice.Servic
es.VoiceService
.{i}.X_CPE_Si
pRtpPort.
object
MaxRtpPort
string
20000
MinRtpPort
string
10000
SipPort
string
5060
InternetGatewa
yDevice.Servic
es.VoiceService
.{i}.VoiceProfil
e.{i}.FaxT38.
object
X_CPE_IsUdp
Tl
boolean
Transmission
protocol. The
values are true
(UDP) and
false (TCP).
true
X_CPE_FaxUd
pEc
string
Error correction
mode of faxes.
T38UdpRedund
ancy
X_CPE_TCFM
ethod
string
Fax rate.
Network
X_CPE_MaxBi
tRate
unsignedInt
Maximum rate.
14400
InternetGatewa
yDevice.X_CP
E_NetworkCon
fig.
object
The network
configuration
object contains
the default
gateway
information (a
WAN router)
and DNS
information
(WAN port
name or static
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
495
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
IP address).
DNSIfName
string
Use a comma
(,) to separate
multiple DNS
servers. The
first one has the
highest priority,
and the last one
has the lowest
priority.

DNSServers
string(33)
Static DNS
server.

ActiveDNSServ
ers
string
This string
contains a list
of DNS IP
addresses that
are same in
resolv.conf.
The default
value 0.0.0.0,
indicating that
the active DNS
server is not
running.
0.0.0.0
InternetGatewa
yDevice.X_CP
E_MultiRegion
Config.
object
Adaption to
multiple
countries.
CurrentRegion
string(32)
Current
country. The
example values
are CHINA,
NEW
ZEALAND,
and
IRELAND.
InternetGatewa
yDevice.X_CP
E_MultiRegion
Config.Region
Config.{i}.
object
Region.
RegionName
string(32)
Region name.
InternetGatewa
yDevice.X_CP
E_MultiRegion
Config.Region
Config.{i}.Gain
object
Region gain.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
496
eSpace EGW1520 Enterprise Gateway
Product Documentation
Parameter
12 Reference
Type
Writable
Description
Default Value
Rxgain
int[-12:6]
Receiving gain
of an analog
phone, in dB.
Txgain
int[-12:6]
Transmission
gain of an
analog phone,
in dB.
InternetGatewa
yDevice.X_CP
E_MultiRegion
Config.Region
Config.{i}.Tim
eParameterConf
ig.
object
Region time.
on-hookmintim
unsignedInt[0:2
000]
Minimum
on-hook
confirmation
duration, in
milliseconds.
off-hookmintim
unsignedInt[0:2
000]
Minimum
off-hook
confirmation
duration, in
milliseconds.
Flashhookminti
me
unsignedInt[0:1
000]
Minimum
hookflash
duration, in
milliseconds.
Flashhookmaxti
me
unsignedInt[0:1
000]
Maximum
hookflash
duration, in
milliseconds.
Config.
12.2 Security Log Information
This topic describes the security log information displayed on the security log page.
Table 12-2 Security log information
No.
Information
Module
Added an ATM interface
ADSL
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
497
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
No.
Information
Deleted an ATM interface
Added ADSL configuration
remove adsl PPPOE Service
Added WAN configuration succeed
remove wan IPOE Service succeed
Modified 3G configuration
3G
Saved basic configuration of the
wireless network
WLAN
Modified security configuration of the
wireless network
10
Added the MAC filter information
about the wireless network succeed
11
Deleted the MAC filter information
about the wireless network succeed
12
Saved the MAC filter information about
the wireless network succeed
13
Saved advanced configuration of the
wireless network
14
Saved LAN information succeed
15
Added LAN information succeed
16
Deleted LAN information succeed
17
Modified DNS information
DNS
18
Added an incoming IP address filtering
rule
Security
19
Deleted an outgoing IP address filtering
rule
20
Added an outgoing IP address filtering
rule
21
Deleted an outgoing IP address filtering
rule
22
Changed Mac filtering policy
23
Added Filter MAC
24
Deleted Filter MAC
25
Added security URL filter information
26
Deleted security URL filter information
Issue 01 (2012-05-15)
Module
WAN
LAN
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
498
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
No.
Information
27
Saved security URL filter information
28
Added Virtual Server
29
Deleted Virtual Server
30
Modified Dmz host IP address
31
save Remote login info
32
Added a static route
33
Deleted a static route
34
Added a VPN tunnel
35
Modified a VPN tunnel
36
Deleted a VPN tunnel
37
Deleted a VPN tunnel
38
Added a VPN Stream
39
Modified a VPN Stream
40
Deleted a VPN Stream
41
Added a local certificate
42
Imported a local certificate
43
Deleted a local certificate
44
Imported a ca certificate
45
Deleted a ca certificate
46
Saved VLAN configuration
VLAN
47
Saved QoS configuration management
information
QoS
48
Added QoS queue configuration
49
Deleted QoS queue configuration
50
Saved QoS queue configuration
51
Added QoS stream classification
information
52
Enable QoS stream classification
information
53
Disable QoS stream classification
information
54
Deleted QoS stream classification
information
Issue 01 (2012-05-15)
Module
Routing
VPN
Certificate
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
499
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
No.
Information
Module
55
Modified anti-attack information
AntiAttack
56
Modified the SIP registration
SIP Server
57
Modified the phone configuration
Phone Allocation
58
Modified FXO prefix
FXO Configuration
59
Modified FXO bound number
60
Modified attendant configuration
61
Modified voice service permission
62
Modified voice service configuration
63
Changed the service prefix
Service Prefix
64
Uploaded a voice file
Upload Voice File
65
Saved country configuration in voice
parameters
Voice parameters
66
Modified DSP configuration in voice
parameters
67
Saved RTP information in voice
parameters
68
Saved SIP information in voice
parameters
69
change the info of Voice Parameters
SIP ALG
70
Changed the password
Change Password
71
Backed up a configuration file
Configuration
72
Imported a configuration file
73
Imported a configuration file
74
Set the date and time
Date&Time
75
Configured the TR069 client
TR-069 Client
76
Updated the image file
Update Software
77
Auto Upgrade image file
78
Restarted the system
Restart
79
Restored to factory settings
Restore Default
80
Saved system logs
System Logs
81
Downloaded system logs
82
Deleted system logs
Issue 01 (2012-05-15)
Service Manager
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
500
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
No.
Information
Module
83
Modified and saved debug logs
Debug Logs
84
Downloaded alarm logs
Warning info
85
Deleted alarm logs
86
Downloaded security logs
87
Deleted security logs
88
Modified and saved captured packets
from an imaged port
Packet Mirroring
89
Downloaded the black box file
Black Box
90
Deleted the black box file
91
Run the ping command
Ping Diagnose
92
Saved call records
Call Recording
93
Downloaded call records
94
Clicked one button to download
information
One-Click Download
95
user login failed
Login
96
users been locked
97
user login succeed
98
User logout succeed
SecurLog info
Logout
12.3 Customizing Voice Prompts for the Switchboard
This topic describes how to customize voice prompts for the switchboard. Before delivery, the
EGW1520 is loaded with switchboard voice prompts by default.
Background
The following describes how to use the recording software of Windows to customize voice
prompts for the switchboard.
The voice file is 200.pcm. You must name the voice file to 200.pcm to replace the original
one.
Procedure
Step 1 Choose Start > All Programs > Accessories > Entertainment > Sound Recorder
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
501
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
The page shown in Figure 12-1 is displayed.
Figure 12-1 Sound recorder
Step 2 Click
to record a voice prompt.
Step 3 Click
to stop recording.
Step 4 Choose File > Save to save the recording.
Step 5 Convert the recording to a file in the CCITT A-Law, 8000 Hz, 8 bit, mono format.
1.
Choose File > Properties
The page shown in Figure 12-2 is displayed.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
502
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
Figure 12-2 Modifying recording properties (1)
2.
Click Convert Now.
The page shown in Figure 12-3 is displayed.
Figure 12-3 Modifying recording properties (2)
3.
Set Format to CCITT A-Law, and set Attribute to 8.000 kHz, 8 bit, mono 7 Kbit/s.
4.
Click OK.
Step 6 Choose File > Save As to save the recording as the 200.pcm file.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
503
eSpace EGW1520 Enterprise Gateway
Product Documentation
12 Reference
Step 7 Upload the 200.pcm file.
For details, see 9.12 Uploading Voice Files.
----End
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
504
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
13
Glossary
About This Chapter
This section provides the glossary of documentation.
13.1 Numerics
13.2
13.3
13.4
13.5 D
13.6 E
13.7 F
13.8
13.9
13.10 I
13.11
13.12 M
13.13 N
13.14
13.15 P
13.16
13.17 R
13.18 S
13.19 T
13.20 U
13.21 V
13.22 W
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
505
eSpace EGW1520 Enterprise Gateway
Product Documentation
13.23
13 Glossary
13.1 Numerics
3WC
See three-way calling
802.11n
A wireless transmission standard released after 802.11a/b/g by Wi-Fi
Alliance. As a new member to the 802.11 protocol family, 802.11n
supports the 2.4 GHz and 5 GHz frequency bands and provides a
higher bandwidth (300 Mbit/s, much higher than the 54 Mbit/s
provided by 802.11a/g) for WLAN access users. In addition, 802.11n
supports the MIMO technology, which provides two methods of
increasing the communication rate: by increasing the bandwidth and
by improving the channel usage.
AC mains
The principal conduit in a system for conveying AC power utility.
access point
Any entity that has station functionality and provides access to the
distribution services, via the wireless medium (WM) for associated
stations.
access server
Any device that enables multiple remote users to access a network.
active
A state of a piece of equipment in normal operation.
adapter
A universal protocol conversion device. The adapter is responsible for
the conversion between external protocols and internal messages.
address
A number that identifies the location of a device in a network or the
location on the hard disk or the memory, such as the IPv4 address or
IPv6 address of a network entity.
address pool
A set of IP addresses assigned by Internet Assigned Number
Authority (IANA) or an organization tied to IANA.
Address
Resolution
Protocol
An Internet Protocol used to map IP addresses to MAC addresses. It
allows hosts and routers to determine the link layer addresses through
ARP requests and ARP responses.
administrator
A user who has authority to access all the Management Domains of
the product. He or she has access to the whole network and to all the
management functionalities.
application layer
It provides applications such as game center, conference center, friend
center, enterprise applications, IM, streaming and general
telecommunication services. It can also invoke the service capability
of the lower layer through the API interface provided by OSA to
implement various services.
application
server
A service processing node (a computer device) in the network.
Application programs of data services are run on the application
server.
13.2 A
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
506
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
application
service provider
A company that provides Internet download and related services for
various organizations. Without ASP, these organizations have to store
such information in their own computers.
area code
The national area code assigned for a local network, which is used in
call connection.
ARP
See Address Resolution Protocol
ASP
See application service provider
audio
The sound portion of a program or a track recorded on a videotape
which contains sound, music or narration.
authentication
A process of checking whether a user can be awarded with access
right or what kinds of users can access a resource.
backup
A periodic operation performed on the data stored in the database for
the purposes of database recovery in case that the database is faulty.
The backup also refers to data synchronization between active and
standby boards.
band
The range of frequencies between two defined limits.
bandwidth
A range of transmission frequencies that a transmission line or
channel can carry in a network. In fact, it is the difference between
the highest and lowest frequencies the transmission line or channel.
The greater the bandwidth, the faster the data transfer rate.
base
A kind of bus or plane used to load software, transmit alarms and
maintain information exchange.
baseband
A form of modulation in which the information is applied directly
onto the physical transmission medium.
basic service
This term is used as a common reference to both bearer services and
teleservices.
bidirectional
Pertaining to a link where the transfer of users' information is possible
simultaneously in both directions between two points. Notes: 1. The
transmission channel capacity and signaling rate are not necessarily
the same in both directions. 2. Do not use this term to describe the
directions of call setups.
bit
The smallest unit of information handled by a hardware component.
One bit expresses a 1 or a 0 in a binary numeral, or a true or a false
logical condition, and is represented physically by an element such as
a high or low voltage at one point in a circuit or a small spot on a disk
magnetized one way or the other. A single bit conveys little
information a human would consider meaningful. A group of eight
bits, however, makes up a byte, which can be used to represent many
types of information, such as a letter of the alphabet, a decimal digit,
or other character.
13.3 B
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
507
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
bit error rate
Ratio of received bits that contain errors. BER is an important index
used to measure the communications quality of a network.
blacklist
A method of filtering packets based on their source IP addresses.
Compared with ACL, the match condition for the black list is much
simpler. Therefore, the black list can filter packets at a higher speed
and can effectively screen the packet sent from the specific IP
address.
BRAS
See broadband remote access server
bridge
A device that connects two or more networks and forwards packets
among them. Bridges operate at the physical network level. Bridges
differ from repeaters because bridges store and forward complete
packets, while repeaters forward all electrical signals. Bridges differ
from routers because bridges use physical addresses, while routers
use IP addresses.
bridging
The action of transmitting identical traffic on the working and
protection channels simultaneously.
broadband access
server
A server providing features as user access, connection management,
address allocation and authentication, authorization and accounting. It
also works as a router featuring effective route management, high
forwarding performance and abundant services.
broadband
remote access
server
A new type of access gateway for broadband network. As a bridge
between backbone networks and broadband access networks, BRAS
provides methods for fundamental access and manages the broadband
access network. It is deployed at the edge of network to provide
broadband access services, convergence, and forwarding of multiple
services, meeting the demands for transmission capacity and
bandwidth utilization of different users. Hence, BRAS is a core
device for the broadband users' access to a broadband network.
broadcast
domain
A group of network stations that receives broadcast packets
originating from any device within the group. Broadcasts do not pass
through a router, which bound the domains. In addition, the set of
ports between which a device forwards a multicast, broadcast, or
unknown destination frame.
buffer
A storage area used for handling data in transit. Buffers are used in
networking to compensate for differences in processing speed
between network devices. Bursts of data can be stored in buffers until
they can be handled by slower processing devices. In a program,
buffers are created to hold some amount of data from each of the files
that will be read or written. In a streaming media application, the
program uses buffers to store an advance supply of audio or video
data to compensate for momentary delays.
buffer overflow
A buffer overflow occurs when a program or process tries to store
more data in a buffer (temporary data storage area) than it was
intended to hold. Since buffers are created to contain a finite amount
of data, the extra information - which has to go somewhere - can
overflow into adjacent buffers, corrupting or overwriting the valid
data held in them. Although it may occur accidentally through
programming error, buffer overflow is an increasingly common type
of security attack on data integrity.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
508
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
bus
A path or channel for signal transmission. The typical case is that, the
bus is an electrical connection that connects one or more conductors.
All devices that are connected to a bus, can receive all transmission
contents simultaneously.
byte
A unit of computer information equal to eight bits.
call control
A set of functions used to process a call, including establishing,
supervising, maintaining, connecting, and releasing calls, and provide
service features.
call forwarding
A feature on telephone networks that allows an incoming call to a
called party, who is unavailable, to be redirected to another telephone.
call hold
A service that permits a subscriber to hold a call already set up. In this
case, the transmission of media streams between the caller and callee
is stopped, but the call resources are not released. The call can be
resumed when required.
call transfer
A feature on telephone networks that enables a user to relocate an
existing call to another telephone by using the transfer button and
dialing the required location.
carriage return
The keyboard key used to signal the end of a line of data or the end of
a command.
carrier
An organization that has telecom network resources and can provide
communications service.
CDR
Call Detail Record.
CFU
Call Forwarding Unconditional.
Challenge
Handshake
Authentication
Protocol
A method to periodically verify the identity of the peer using a 3-way
handshake. During the setting up of a link, the authenticator sends a
"challenge" message to the peer. The peer responds with a value
calculated using a "one-way hash" function. The authenticator checks
the response against its own calculation of the expected hash value. If
the values match, the authentication is acknowledged. CHAP
provides protection against playback attack.
channel
A telecommunication path of a specific capacity and/or at a specific
speed between two or more locations in a network. Channels can be
established through wire, radio (microwave), fiber or a combination
of the three. The amount of information transmitted per second in a
channel is the information transmission speed, expressed in bits per
second. For example, bit/s, kbit/s, Mbit/s, Gbit/s, and Tbit/s.
CHAP
See Challenge Handshake Authentication Protocol
claw hammer
Used to knock or shape a workpiece, or extract a nail.
client mode
The login mode of a client, which includes the single-user mode and
multi-user mode. By default, the login mode is the multi-user mode.
13.4 C
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
509
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
Client/Server
The model of interaction in a distributed system in which a program
at one site sends a request to a program at another site and awaits a
response. The requesting program is called a client. The program
satisfying the request is called the server.
CLK
clock.
CNG
comfort noise generation.
code
A method of replacing Chinese characters with English letters.
Usually, you can perform code through the methods such as simple
spelling, full spelling, initials, and full spelling of the last word but
initials of other words. For example, the simple spelling of Huawei in
the number library is hw.
CODEC
See coder and decoder
coder and
decoder
Coder transforms analog data into a digital bit stream. Decoder
transforms digital signals into analog data.
collision
A condition in which two packets are being transmitted over a
medium at the same time. Their interference makes both
unintelligible.
command line
A string of text written in the command language and passed to the
command interpreter for execution.
concentrator
A switching device allowing simultaneous different connections
between a plurality of inlets on one side and a small number of traffic
circuits on the other. Note: The concentrator performs a traffic
concentration in one direction and a traffic expansion.
congestion
An extra intra-network or inter-network traffic resulting in decreasing
network service efficiency.
congestion
management
A flow control measure to solve the problem of network resource
competition. When the network congestion occurs, it places the
packet into the queue for buffer and determines the order of
forwarding the packet.
core
A memory, especially one consisting of a series of tiny
doughnut-shaped masses of magnetic material.
cross-sectional
area
The area of a two-dimensional slice of a three-dimensional object.
data flow
A process that involves processing the data extracted from the source
system, such as filtering, integration, calculation, and summary,
finding and solving data inconsistency, and deleting invalid data so
that the processed data meets the requirements of the destination
system for the input data.
data model
When we use IT systems to manage business information, we extract
the main features of the information according to the business
requirements, and then abstract a model that can reflect the
13.5 D
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
510
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
relationship between the business information (objects). This model is
called data model.
database
A database stores a combination of data. Serving various applications,
the data is configurable and has no harmful or unnecessary
redundancy. The data is stored separately from the relevant programs.
You can use a common and controllable method to insert new data
into the database in addition to modifying and searching the data in
the database. If several databases totally separated in structure exist in
a system, the system contains a database combination.
datagram
A kind of PDU which is used in Connectionless Network Protocol,
such as IP datagram, UDP datagram.
daylight saving
time
Time during which clocks are set one hour or more ahead of standard
time to provide more daylight at the end of the working day during
late spring, summer, and early fall.
dBm
Absolute power level with respect to 1 milliwatt, expressed in
decibels.
DC
See direct current
decoding
The process of restoring information from its coded representation to
the original form.
default gateway
A configuration item for the TCP/IP protocol that is the IP address of
a directly reachable IP router.
delay
An average time taken by the service data to transmit across the
network.
demodulation
In communications, the means by which a modem converts data from
modulated carrier frequencies (waves that have been modified in such
a way that variations in amplitude and frequency represent
meaningful information) over a telephone line. Data is converted to
the digital form needed by a computer to which the modem is
attached, with as little distortion as possible.
DHCP
See Dynamic Host Configuration Protocol
DHCP relay
Dynamic Host Configuration Protocol relay.
DHCP server
A program that allocates the IP addresses of the local address pool to
the users at the user side and allocates the IP addresses of the relay
address pool to the users that pass through the DHCP proxy at the
network side.
dial tone
A dial tone is a telephony signal used to indicate that the telephone
exchange is working, has recognized an off-hook, and is ready to
accept a call. The tone stops when the first numeral is dialed. If no
digits are forthcoming, the permanent signal procedure is invoked,
often eliciting a special information tone.
digital subscriber
line
A technology for providing digital connections over the copper wire
or the local telephone network. DSL performs data communication
over the POTS lines without affecting the POTS service.
digital subscriber
line access
A network device, usually situated in the main office of a telephone
company that receives signals from multiple customer Digital
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
511
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
multiplexer
Subscriber Line (DSL) connections and puts the signals on a
high-speed backbone line using multiplexing techniques.
direct current
Electrical current whose direction of flow does not reverse. The
current may stop or change amplitude, but it always flows in the same
direction.
Distributed
Object-oriented
Programmable
Realtime
Architecture
An OS-layer, middleware-level, highly-tailorable, component-based,
open software platform. It helps to accommodate the difference of
upper-layer OS, hardware, network, and system scale.
DND
do not disturb.
DNS
domain name server.
DNS server
A device that can provide domain name resolution for the client on
the network
domain name
A name composed of numbers or characters. Each domain name
corresponds to an IP address.
DOPRA
See Distributed Object-oriented Programmable Realtime Architecture
downstream
In an access network, where there is a clear indication in each
deployment as to which end of a link is closer to a subscriber,
transmission toward the subscriber end of the link.
DSL
See digital subscriber line
DSLAM
See digital subscriber line access multiplexer
DST
See daylight saving time
dual core
Dual core means that the processor has two full execution cores, both
running at the same clock, in one physical processor.
dual homing
A network topology in which a device is connected to the network at
two independent access points. One point is the primary connection
and the other a standby connection that is activated in the event of a
failure of the primary connection.
duplex
Capable of carrying information in both directions over a
communications channel. A system is full-duplex if it can carry
information in both directions at once; it is half-duplex if it can carry
information in only one direction at a time.
Dynamic Host
Configuration
Protocol
A client-server networking protocol. A DHCP server provides
configuration parameters specific to the DHCP client host requesting,
generally, information required by the host to participate on the
Internet network. DHCP also provides a mechanism for allocation of
IP addresses to hosts.
EC
See echo cancellation
13.6 E
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
512
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
echo cancellation
Echo cancellation indicates the configuration of an echo canceler
(usually called EC) in the communication network with the echo
problem to reduce or eliminate echoes.
element
A document structuring unit delimited by tags. An element is
delimited by a start-tag and an end-tag, except an empty element that
is delimited by an empty-element tag.
encapsulation
The technique used by layered protocols in which a lower level
protocol accepts a message from a higher-level protocol and places it
in the data portion of the low level frame. Handing protocol A's
packets, the packets are complete with A's header information, as data
carried by protocol B. Encapsulated protocol A packets have a B
header, followed by an A header, followed by the information that
protocol A is carrying its own data. Note that A could equal to B, as
in IP inside IP.
encryption
A function used to transform data to hide its information content to
prevent unauthorized use.
equipment serial
number
A string of characters that identify a piece of equipment and ensures
correct allocation of a license file to the specified equipment. It is also
called "equipment fingerprint".
ES
echo suppression.
Ethernet
A technology complemented in LAN. It adopts Carrier Sense
Multiple Access/Collision Detection. The speed of an Ethernet
interface can be 10 Mbit/s, 100 Mbit/s, 1000 Mbit/s or 10000 Mbit/s.
The Ethernet network features high reliability and easy maintaining.
fast Ethernet
Any network that supports transmission rate of 100 Mbit/s. The Fast
Ethernet is 10 times faster than 10BaseT, and inherits frame format,
MAC addressing scheme, MTU, and so on. Fast Ethernet is extended
from the IEEE802.3 standard, and it uses the following three types of
transmission media: 100BASE-T4 (4 pairs of phone twisted-pair
cables), 100BASE-TX (2 pairs of data twisted-pair cables), and
100BASE-FX (2-core optical fibers).
fault location
A technique for fault location estimation which uses data from both
ends of the transmission line and which does not require the data to be
synchronized.
fault
management
The fault management of Ethernet OAM includes the connectivity
detection of the network, the location and the confirmation of failures,
protection switching triggered by the cooperation with automatic
protection switching protocol.
fax call
A call that a user initiates by dialing a specified phone number on a
fax machine. After the call is connected, the call center platform
converts the content to be faxed into an email and sends the email to
an agent. Then the agent provides services for the user by replying to
the email.
13.7 F
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
513
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
FE
See fast Ethernet
FIFO
See first in first out
filter
The filter is used to filter the matched logs and have the unmatched
one left.
firewall
A combination of a series of components set between different
networks or network security domains. By monitoring, limiting, and
changing the data traffic across the firewall, it masks the interior
information, structure and running state of the network as much as
possible to protect the network security.
firmware
The programmable software part in a hardware component. A
firmware is a part of hardware, but is scalable as software.
first in first out
A stack management mechanism. The first saved data is first read and
invoked.
flow
An aggregation of packets that have the same characteristics. On the
network management system or NE software, flow is a group of
classification rules. On boards, it is a group of packets that have the
same quality of service (QoS) operation.
forwarded to
number
A destination number set by a subscriber who has subscribed to the
call forwarding service, that is, a number to which an incoming call is
forwarded.
frame
A frame, starting with a header, is a string of bytes with a specified
length. Frame length is represented by the sampling circle or the total
number of bytes sampled during a circle. A header comprises one or a
number of bytes with pre-specified values. In other words, a header is
a code segment that reflects the distribution (diagram) of the elements
pre-specified by the sending and receiving parties.
frequency
The measure of how often a periodic event occurs, such as a signal
going through a complete cycle.
field replaceable
unit
A unit that can function as a circuit board, part, or component of an
electronic device. It can be quickly and easily removed from a
personal computer or other electronic devices. If an FRU becomes
faulty, users can replace it with a new one instead of sending the
entire product or system for maintenance.
FTP server
A file server that uses the File Transfer Protocol (FTP) to permit users
to upload or download files through the Internet or any other TCP/IP
network.
FTPS
See FTP server
full-duplex
A full-duplex, or sometimes double-duplex system, allows
communication in both directions, and, unlike half-duplex, allows this
to happen simultaneously. Land-line telephone networks are
full-duplex, since they allow both callers to speak and be heard at the
same time. A good analogy for a full-duplex system would be a
two-lane road with one lane for each direction.
function module
A set of code to perform a particular task with inputs to be passed.
The Function module enables you to write your own script to control
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
514
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
what the module does.
13.8 G
G.711
Audio codec standard (A-law or u-law) that uses pulse code
modulation (PCM). Its data rate is 64 kbit/s.
G.722
Audio codec standard that uses adaptive differential pulse-code
modulation (ADPCM). Its data rate is 48 kbit/s, 56 kbit/s, or 64 kbit/s.
gain
The ratio between the optical power from the input optical interface
of the optical amplifier and the optical power from the output optical
interface of the jumper fiber, which expressed in dB.
gate
An electronic switch that is the elementary component of a digital
circuit. It produces an electrical output signal that represents a binary
1 or 0 and is related to the states of one or more input signals by an
operation of Boolean logic, such as AND, OR, and XOR.
gateway
A device that connects two network segments using different
protocols. It is used to translate the data in the two network segments.
grounding
resistance
One of the important parameters in the lightning-protection design of
electric power systems. The grounding resistance of electrode
decreases as large currents are injected to the electrode by electric
discharges in soil.
half-duplex
A transmitting mode in which a half-duplex system provides for
communication in both directions, but only one direction at a time
(not simultaneously). Typically, once a party begins receiving a
signal, it must wait for the transmitter to stop transmitting, before
replying.
hammer drill
Used to drill holes. Choose different drill bits according to the depth
of holes and expansion bolt models.
handshake
Sequence of messages exchanged between two or more network
devices to ensure transmission synchronization.
hop
A network connection between two distant nodes. For Internet
operation a hop represents a small step on the route from one main
computer to another.
HSPA
High Speed Packet Access.
13.9 H
13.10 I
ICMP
Issue 01 (2012-05-15)
See Internet Control Message Protocol
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
515
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
ID
identity.
IE
See Internet Explorer
IMS
See IP Multimedia Subsystem
insulation
A non-conducting material that prevents heat, sound, or electricity
from passing through it.
interconnection
The connection that allows users to communicate in different
networks and systems.
interface
A boundary between two systems or between two parts of the same
system, defined by the specification of suitable characteristics,
usually for the purpose of ensuring format, function, signal and
interconnection compatibility at the boundary.
interface module
The module that accommodates the front-end host port and
back-end disk port.
interference
A phenomenon resulting from the superposition of two or more
coherent oscillations or waves of equal or nearly equal frequency
and appearing as a variation of the resultant amplitude, in space in
the form of interference patterns and in time in the form of beats.
International
Telecommunication
Union
A United Nations agency, one of the most important and influential
recommendation bodies, responsible for recommending standards
for telecommunication (ITU-T) and radio networks (ITU-R).
Internet Control
Message Protocol
A network-layer (ISO/OSI level 3) Internet protocol that provides
error correction and other information relevant to IP packet
processing. For example, it can let the IP software on one machine
inform another machine about an unreachable destination. See also
communications protocol, IP, ISO/OSI reference model, packet
(definition 1).
Internet Explorer
Microsoft's Web browsing software. Introduced in October 1995,
the latest versions of Internet Explorer include many features that
allow you to customize your experience on the Web. Internet
Explorer is also available for the Macintosh and UNIX platforms.
Internet Protocol
The protocol within TCP/IP that governs the breakup of data
messages into packets, the routing of the packets from sender to
destination network and station, and the reassembly of the packets
into the original data messages at the destination. IP runs at the
internetwork layer in the TCP/IP model-equivalent to the network
layer in the ISO/OSI reference model.
Internet service
provider
An organization that offers users access to the Internet and related
services.
interval
In mathematics, an interval is a set of real numbers with the
property that any number that lies between two numbers in the set is
also included in the set.
intranet
A private network based on Internet protocols such as TCP/IP but
designed for information management within a company or
organization.
IP
See Internet Protocol
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
516
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
IP Multimedia
Subsystem
A standardized Next Generation Networking (NGN) architecture
for telecommunications carriers who want to provide mobile and
fixed multimedia services. It uses a Voice-over-IP (VoIP)
implementation based on a 3rd Generation Partnership Project
(3GPP) standardized implementation of Session Initiation Protocol
(SIP), and runs over the standard Internet Protocol (IP). Existing
phone systems (both packet-switched and circuit-switched) are
supported. The aim of IMS is not only to provide new services but
all the services, current and future, that the Internet provides. In this
way, IMS will provide carriers and service providers with the
ability to control and charge each service. In addition, users have to
be able to execute all their services when roaming as well as from
their home networks. To achieve these goals, IMS uses open
standard IP protocols, defined by the Internet Engineering Task
Force (IETF). A multimedia session between two IMS users,
between an IMS user and an Internet user, or between two Internet
users is established using the same protocol. The interfaces for
service developers are also based on IP protocols. This is why IMS
truly merges the Internet with the cellular world; it uses cellular
technologies to provide ubiquitous access and Internet technologies
to provide appealing services.
IPoA
Internet Protocol over ATM.
ISP
See Internet service provider
ITU
See International Telecommunication Union
13.11 L
LAN
See local area network
LAN switch
A piece of equipment used to allocate communication links in a LAN.
latency
The time it takes for the original data to go through a series of
processing steps such as coding, to be transmitted through the
channel, to arrive at the receiver, and to be decoded.
layer
A concept used to allow the transport network functionality to be
described hierarchically as successive levels; each layer being solely
concerned with the generation and transfer of its characteristic
information.
layer 2 switch
A data forwarding method. In LAN, a network bridge or 802.3
Ethernet switch transmits and distributes packet data based on the
MAC address. Since the MAC address is the second layer of the OSI
model, this data forwarding method is called layer 2 switch.
level
An element in the dimension hierarchy structure. Levels describe the
hierarchy of data from the top layer to the bottom layer. Each
dimension contains levels according to the attributes of the data. For
example, a time dimension contains four levels: year, quarter, month,
and date.
link
1. In the topology view, a link is used to identify the physical or
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
517
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
logical connection between two topological nodes. 2. A network
communication channel consisting of a circuit or transmission path
and all related equipment between a sender and a receiver. A link is
used to connect signaling points (SPs) and signaling transfer points
(STPs) and transmit signaling messages.
list box
A control in Windows that enables the user to choose one option from
a list of possibilities.
loading
A process of importing information from the storage device to the
memory to facilitate processing (when the information is data) or
execution (when the information is program).
local area
network
A network formed by the computers and workstations within the
coverage of a few square kilometers or within a single building. It
features high speed and low error rate. Ethernet, FDDI, and Token
Ring are three technologies used to implement a LAN. Current LANs
are generally based on switched Ethernet or Wi-Fi technology and
running at 1,000 Mbit/s (that is, 1 Gbit/s).
log
A type of file that records the system events occurring during the
running of the system. The system events include the running,
input/output (I/O) operations, exceptions, and security events. Logs
provide a basis for the querying and maintenance of the system.
log management
A measure that is used to find illegal operations and fault reasons by
querying and monitoring logs, and to protect network security by
taking appropriate measures.
loop
Electricity. A closed circuit.
mains supply
The commercial power supply of a nation.
maintenance
The process of taking measures to ensure that a hardware, software,
or database system is functioning properly and is up to date.
MAN
metropolitan area network.
mapping
A procedure by which tributaries are adapted into virtual containers at
the boundary of an SDH network.
mask
A pattern of characters, bits, or bytes used to control the elimination
or retention of another pattern of characters, bits, or bytes.
media
information
Information about digital media content such as the artist, title, album,
producer, and so forth.
media negotiation
Through it, two UEs reach an agreement on media combinations used
by a session and coding schemes used by media.
medium
A physical medium for storing computer information. A medium is
used for data duplication and keeping the data for some time. Original
data can be obtained from a medium.
microwave
The portion of the electromagnetic spectrum with much longer
13.12 M
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
518
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
wavelengths than infrared radiation, typically above about 1 mm.
middleware
1. Software that sits between two or more types of software and
translates information between them. Middleware can cover a broad
spectrum of software and generally sits between an application and an
operating system, a network operating system, or a database
management system. Examples of middleware include CORBA and
other object broker programs and network control programs. 2.
Software that provides a common application programming interface
(API). Applications written using that API will run in the same
computer systems as the middleware. An example of this type of
middleware is ODBC, which has a common API for many types of
databases. See also application programming interface, ODBC. 3.
Software development tools that enable users to create simple
programs by selecting existing services and linking them with a
scripting language.
mode
One solution of Maxwell's equations, representing an electromagnetic
field in a certain space domain and belonging to a family of
independent solutions defined by specified boundary conditions.
modem
A device or program that enables a computer to transmit data over,
for example, telephone or cable lines. Computer information is stored
digitally, whereas information transmitted over telephone lines is
transmitted in the form of analog waves. A modem converts between
these two forms.
modulated signal
An oscillation or wave produced by modulation.
modulation
A process by which a quantity which characterizes an oscillation or
wave follows the variations of a signal or of another oscillation or
wave.
module
A set of program statements (the combination of functional codes and
data structure) that are executed on hardware and separately named to
implement certain functions independently.
multicast
A process of transmitting packets of data from one source to many
destinations. The destination address of the multicast packet uses
Class D address, that is, the IP address ranges from 224.0.0.0 to
239.255.255.255. Each multicast address represents a multicast group
rather than a host.
multicast group
A set of members participating in the packet multicast service. The
multicast group is defined by a rule (or set of rules) which identifies a
collection of members implicitly or explicitly. This rule may associate
members for the purpose of participating in a call, or may associate
members who do not participate in data transfer but participate in
management, security, control, and accounting for the multicast
group.
MUX
multiplexer.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
519
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
13.13 N
narrowband
Communication services that transmit over TDM timeslot. The PSTN
is normally a narrowband network. A communication channel whose
transmission rate is lower than 2 Mbit/s is usually considered to be
narrowband.
NAT
See network address translation
NAT traversal
For the general datagram, the NAT device or firewall transforms only
the IP, TCP or UDP header. For application-layer protocols such as
H.323, SIP, MGCP and H.248, the IP addresses contained in the
signaling protocols are private addresses. The private addresses
carried in user signaling messages cannot be replaced, but the call
addresses of media streams are negotiated dynamically by signaling
protocols. Therefore, the correct media channel cannot be established.
NAT traversal can identify and change the message contents of
multiple signaling protocols, and pre-assign the UDP ports of media
streams.
network address
translation
An IETF standard that allows an organization to present itself to the
Internet with far fewer IP addresses than there are nodes on its
internal network. The NAT technology, which is implemented in a
router, firewall or PC, converts private IP addresses (such as in the
192.168.0.0 range) of the machine on the internal private network to
one or more public IP addresses for the Internet. It changes the packet
headers to the new address and keeps track of them via internal tables
that it builds. When packets come back from the Internet, NAT uses
the tables to perform the reverse conversion to the IP address of the
client machine.
network jitter
A sound adjustment method. A higher network jitter contributes to a
better connectivity of sounds. In a conference, the lip movements and
voice of a speaker may not be synchronous. To solve this problem,
users can adjust the network jitter value.
network layer
Layer 3 of the seven-layer OSI model of computer networking. The
network layer provides routing and addressing so that two terminal
systems are interconnected. In addition, the network layer provides
congestion control and traffic control. In the TCP/IP protocol suite,
the functions of the network layer are specified and implemented by
IP protocols. Therefore, the network layer is also called IP layer.
network port
Numbers which are recognized by Internet and other network
protocols, enabling the computer to interact with others.
network segment
A part of an Ethernet or other network, on which all message traffic is
common to all nodes, that is, it is broadcast from one node on the
segment and received by all others.
network service
A service that needs to be enabled at the network layer and
maintained as a basic service.
Network Time
Protocol
The Network Time Protocol (NTP) defines the time synchronization
mechanism. It synchronizes the time between the distributed time
server and the client.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
520
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
network topology
The configuration or layout of a network formed by the connections
between devices on a LAN (local area network) or between two or
more LANs.
next generation
network
A packet-based network aimed to address requirement of various
services. It adopts an integrated and open network framework. In
NGN, services are separated from call control; call control is
separated from bearer. In this way, services are independent of
network. NGN can provide various services, such as voice services,
data services, multimedia services or the integration of several
services.
next hop
The next router to which a packet is sent from any given router as it
traverses a network on its journey to its final destination.
NGN
See next generation network
node
A managed device in the network. For a device with a single frame,
one node stands for one device. For a device with multiple frames,
one node stands for one frame of the device. Therefore, a node does
not always mean a device.
NTP
See Network Time Protocol
NTP client
The bottom-level device in the time synchronization network. An
NTP client obtains time from its superior NTP server and it does not
provide the time synchronization service. Relative to the top-level
NTP server, the medium NTP server sometimes is called an NTP
client.
object-oriented
Of, pertaining to, or being a system or language that supports the use
of objects.
operating
environment
In computing, an operating environment is the environment in which
users run application software, whether by a command-line interface
(such as in MS-DOS or the Unix shell) or a graphical user interface
(such as in the Macintosh operating system or a web browser).
option
An option right that the holder obtains by paying the cost. The holder
can share the right, but does not shoulder the obligation in the
specified time.
organizationally
unique identifier
A 3-octet IEEE assigned identifier that can be used to generate
Universal LAN MAC addresses and Protocol Identifiers per
[IEEE802] for use in Local and Metropolitan Area Network
applications.
originating
address
Address of the node which has initiated the relationship with the
remote application transport(APM) user application.
OUI
See organizationally unique identifier
outbound
For the routers that support the NetStream feature, outbound means
the data transmitted from the router to the external links.
13.14 O
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
521
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
overwrite
Text-entry mode in which newly typed characters replace existing
characters under or to the left of the cursor insertion point.
packet
An information block identified by a label at layer 3 of the OSI
reference model.
packet loss
compensation
A technology of compensating packets according to an appropriate
algorithm if packets are lost in the transmission.
panel
A part used to ensure proper airflow within a shelf and to ensure
electromagnetic compatibility (EMC) by sealing up the slots on the
shelf. It is an external part of a board and is vertically placed with the
printed circuit board (PCB). It includes the ejector lever, indicator,
and port.
PAP
See Password Authentication Protocol
parameter
A value or reference passed to a function, command, or program that
serves as input or to control actions. The value is supplied by a user or
by another program or process.
Password
Authentication
Protocol
A method of verifying the identity of a user who attempts to log in to
a PPP server. This protocol is adopted when a stricter authentication
protocol, such as CHAP, cannot take effect, or the user name and
password submitted by the user for authentication must be forwarded
to other programs without being encrypted.
path
A performance resource object defined in the network management
system. The left end of a path is a device node whose port needs to be
specified and the right end of a path is a certain IP address which can
be configured by the user. By defining a path in the network
management system, a user can test the performance of a network
path between a device port and an IP address. The tested performance
may be the path delay, packet loss ratio or other aspects.
PC
See personal computer
peer end
Router or device that participates as an endpoint.
permanent
virtual circuit
A permanent logical connection between two nodes on a
packet-switching network. The PVC appears as a dedicated line to the
nodes, but the data can be transmitted on a common carrier.
personal
computer
A computer used by an individual at a time in a business, a school, or
at home.
ping
A method used to test whether a device in the IP network is reachable
according to the sent ICMP Echo messages and received response
messages.
point to point
A type of service in which data is sent from a single network
termination to another network termination.
Point-to-Point
A protocol on the data link layer, provides point-to-point transmission
and encapsulates data packets on the network layer. It is located in
13.15 P
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
522
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
Protocol
layer 2 of the IP protocol stack.
Point-to-Point
Protocol over
Ethernet
PPPoE, point-to-point protocol over Ethernet, is a network protocol
for encapsulating PPP frames in Ethernet frames. It is used mainly
with DSL services. It offers standard PPP features such as
authentication, encryption, and compression.
pointer
An indicator whose value defines the frame offset of a virtual
container with respect to the frame reference of the transport entity on
which it is supported.
port
1. Of a device or network, a point of access where signals may be
inserted or extracted, or where the device or network variables may
be observed or measured. 2. In a communications network, a point at
which signals can enter or leave the network en
power adapter
A power supply for just about every electronic device on the market.
Also called an "AC adapter" or a "charger" if used to recharge a
battery, it plugs into the wall and converts AC current to a single DC
voltage in most cases. There are also adapters that output a different
AC voltage. Laptops have both an external power adapter, also called
a "power brick", and an internal power supply. If an external power
adapter is not used with an electronic product such as a desktop
computer, the DC current is created in a power supply inside the unit.
power module
A module that provides power supply to operate other boards or
modules.
power up
To start up a computer; to begin a cold boot procedure; to turn on the
power
power-off
survival
A feature that allows part of the analog phone users to make calls by
connecting to the PSTN through analog trunks in the case that the
device is powered off. This feature is available when there are analog
trunks connecting the SoftCo device and the PSTN.
PPP
See Point-to-Point Protocol
PPPoA
Point-to-Point Protocol over ATM.
PPPoE
See Point-to-Point Protocol over Ethernet
PPPoEoA
Point-to-Point Protocol over Ethernet over ATM.
pre-shared key
A pre-shared key is an alpha-numeric string of 8 - 80 characters. A
pre-shared key can be used instead of certificates to authenticate both
parties during IKE Phase 1 negotiations. The pre-shared key is
entered on both of the communicating devices.
preference
Preference is an extended tariff mode. It is the balance obtained
through calculating the two tariff modes.
prefix
The attribute of the called party. Prefix, also called call prefix, refers
to the prefix of the called number. Prefix is a key factor for defining
services related to a call. The prefixes of different subscribers and
trunk groups can be the same. Therefore, a call service is related to
the prefix and the call source.
priority queue
An abstract data type in computer programming that supports the
following three operations: 1. Add an element to the queue with an
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
523
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
associated priority. 2. Remove the element from the queue that has
the highest priority, and return it. 3. (optional) Look at the element
with highest priority without removing it.
process
A service process in which all or part of the activities are supported or
automatically performed by the computer, for example, the service
request process and leave application process.
product
documentation
Documents that are delivered to customers along with Huawei
products. Product documentation includes the solution description,
system description, product description, installation manuals, and
reference manuals. These documents provide guidance for customers
to understand, operate, and maintain Huawei products.
protocol
A formal set of conventions and rules governing the formatting and
sequencing of message exchange between two communicating
systems.
protocol stack
A set of related communications protocols that operate together and,
as a group, address communication at some or all of the seven layers
of the OSI reference model.
protocol type
A multiplexing field that defines the type of packet in which only a
single field appears in the packet. In contrast, an SAP type of
multiplexing field has a source SAP and a destination SAP. The two
SAP values are numerically unrelated.
proxy
Computer programs that forward protocols between clients and
servers. They are like clients at the server end and are like servers at
the client end.
proxy server
A server located on a network between client software, such as a Web
browser, and another server. It intercepts all requests to the server to
determine whether it can fulfill them itself. If not, it forwards the
request to another server.
PUK code
The key to decode the PIN code. It is a string of 8 characters. User
does not know it.
PVC
See permanent virtual circuit
QoS
See quality of service
quality of service
A commonly-used performance indicator of a telecommunication
system or channel. Depending on the specific system and service, it
may relate to jitter, delay, packet loss ratio, bit error ratio, and
signal-to-noise ratio. It functions to measure the quality of the
transmission system and the effectiveness of the services, as well as
the capability of a service provider to meet the demands of users.
Quick Start
Something that helps you to quickly get familiar with the features and
the user interface.
quintuple
A parameter set used to check whether the network is legal during the
IMS AKA authentication. The quintuple contains the following
13.16 Q
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
524
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
parameters: 1. RAND: A pseudo-random number generated by the
random number generator. The network provides RAND to the User
Equipment (UE). The UE uses RAND to calculate XRES, IK and CK.
2. XRES: A value used for comparison with SRES in the
authentication response message sent by the UE. It checks whether
the UE can pass the authentication handled by the network. 3. CK:
IMS AKA ciphering key. 4. IK: IMS AKA integrity key. 5. AUTN: A
parameter used by the UE to perform the authentication for the
network.
13.17 R
radio frequency
A type of electric current in the wireless network using AC antennas
to create an electromagnetic field. It is the abbreviation of
high-frequency AC electromagnetic wave. The AC with the
frequency lower than 1 kHz is called low-frequency current. The AC
with frequency higher than 10 kHz is called high-frequency current.
RF can be classified into such high-frequency current.
random
Specifically, a reference to an arbitrary or unpredictable situation or
event.
receive channel
The channel used for receiving user's information and which is
relative to a given end of a circuit.
record file
A text file used to exchange and save data. A record file expresses the
data content in text format. Each record serves as a line in the text. A
record can contain multiple fields. Fields are separated by delimiters
or defined in fixed length mode. A file can contain only records of the
same type.
recovery time
The time period between a physical interruption within the
broadcasting chain and the achievement of full functionality.
redirection
number
A forwarding destination number set by a subscriber who has
subscribed to the call forwarding service, that is, a number to which
an incoming call to the subscriber is forwarded.
redundancy
1. The scheme to add more than one channel, elements or parts that
have the same functions with the counterparts in the system or device
at a critical place. When a fault occurs, the system or device can work
well, and the reliability is then improved. 2. In the transmission of
data, the excess of transmitted message symbols over that required to
convey the essential information in a noise-free circuit. Note:
Redundancy may be introduced intentionally (as in the case of error
detection or correction codes)
refresh
Refresh is for status, while update for database.
registrar
A server that accepts REGISTER requests. A registrar is typically
combined with a proxy or redirect server.
relative path
A designation of the location of a file that is related with the current
working directory, as opposed to an absolute or full path which gives
the exact location.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
525
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
relay
An electronic control device that has a control system and a system to
be controlled. The relay of the telepresence system is used to control
the power of telepresence equipment and is controlled by the
telepresence host.
release
To obtain a trouble ticket (TT) from the to-be-processed area of a
service agent and put it to the TT pool of a skill group.
reliability
Reliability provides a measure of how often positioning requests that
satisfy QoS requirements are successful.
request message
It is a SIP message sent from a client to a server for invoking a
particular operation.
response message
It is used to respond to request messages, thus indicating the success
or failure status of the call.
restore
Replace the damaged data with the backup data to restore the system.
RF
See radio frequency
RFC
Request For Comments.
RJ-11
A most commonly used type of phone interface registered with the
Federal Communications Commission (FCC). An RJ-11 connector
has six pins but only two or four are used in general. It is connected to
an untwisted cable.
router
A device on the network layer that selects routes in the network. The
router selects the optimal route according to the destination address of
the received packet through a network and forwards the packet to the
next router. The last router is responsible for sending the packet to the
destination host. Can be used to connect a LAN to a LAN, a WAN to
a WAN, or a LAN to the Internet.
routing protocol
A formula used by routers to determine the appropriate path onto
which data are forwarded.
routing table
A table that stores and updates the locations (addresses) of network
devices. Routers regularly share routing table information to be up to
date. A router relies on the destination address and on the information
in the table that gives the possible routes--in hops or in number of
jumps--between itself, intervening routers, and the destination.
Routing tables are updated frequently as new information is available.
RX
The receiving end of the interface that signals pass through.
scheduling
algorithm
An algorithm that governs the proper timing of a sequence of events
in an operating system or application. For example, an effective
motion graphics scheduling algorithm would be able to retrieve the
graphic objects, process them, and display them without causing
stutter or disruptions.
scheduling
A mechanism used to avoid competition among packets for network
13.18 S
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
526
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
mechanism
resources when congestion occurs.
section
The portion of a SONET transmission facility, including terminating
points, between (i) a terminal network element and a regenerator or
(ii) two regenerators. A terminating point is the point after signal
regeneration at which performance monitoring is (or may be) done.
sequence number
An identifying number used to designate a block of data, an
operation, or part of an operation.
serial port
An input/output location (channel) that sends and receives data to and
from a computer's CPU or a communications device one bit at a time.
Serial ports are used for serial data communication and as interfaces
with some peripheral devices, such as mice and printers.
server
1. On a local area network, a computer running administrative
software that controls access to the network and its resources, such as
printers and disk drives, and provides resources to computers
functioning as workstations on the network. 2. On the Internet or
other network, a computer or program that responds to commands
from a client. For example, a file server may contain an archive of
data or program files; when a client submits a request for a file, the
server transfers a copy of the file to the client. 3. A network device
that provides services to network users by managing shared resources,
often used in the context of a client-server architecture for a LAN.
service and
support
Product support, technical assistance, sales support, phone or
computer-based configuration assistance, software upgrade help lines,
and traditional help desk services.
service capability
The combination of human performance, business process, and
technology that collectively represent an organization's ability to
create value through a distinct part of its operation
service data
The user and/or network information required for the normal
functioning of services.
service flow
An MAC-layer-based unidirectional transmission service. It is used to
transmit data packets, and is characterized by a set of QoS
parameters, such as latency, jitter, and throughput.
service
processing
The execution of service control and basic call processing functions
to provide a service.
session timer
A mechanism that is used after establishment of the session. It
enables the UE to periodically originate REINVITE or UPDATE to
ensure that the session is active.
shared key
authentication
Shared key authentication requires that the STA and the AP be
configured with the same shared key. The process of shared key
authentication is as follows: A STA transmits an authentication
request to an AP, and the AP randomly generates a "challenge text" (a
character string) and transmits it to the STA. The STA then copies the
received "challenge text" to a new message, and transmits the
message encrypted with the shared key to the AP. Then, the AP
decrypts the message by using the shared key, and compares the
decrypted character string with the character string that has been
provided to the STA. If the character strings are the same, it indicates
that the STA has the same shared key with the AP, that is, the STA
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
527
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
passes the shared key authentication; otherwise, the STA fails to pass
the shared key authentication.
sideband
In electronic signal transmission, a sideband is the portion of a
modulated carrier wave that is either above or below the basic
(baseband) signal. The portion above the baseband signal is the upper
sideband; the portion below is the lower sideband. In regular
amplitude modulation (AM) transmission, both sidebands are used to
carry a message. In some forms of transmission, one sideband is
removed (single-sideband transmission) or a portion of one sideband
is removed.
signal
1. In electronics, a signal is an electric current or electromagnetic
field used to convey data from one place to another. 2. In some
information technology contexts, a signal is simply "that which is sent
or received," therefore including both the carrier and the signal. 3. In
telephone, signals are special data used for setting up and controlling
the communication.
signal tone
A digital announcement played at a specific frequency and cadence
ratio, and represents the specific meanings. The dial tone, busy tone,
ring back tone, test code tone, and mute tone are signal tones.
signaling
The information exchange concerning the establishment and control
of a telecommunication circuit and the management of the network.
silent time
A set time threshold when a host stops accessing a designated storage
area.
site
A group of IP systems with IP connectivity, which can be achieved
independent of SP networks.
SOAP
Simple Object Access Protocol.
softswitch
A device that provides call control and connection control for
real-time services. As main control of the NGN, softswitches separate
the services from the call control and the call control from the bearer,
and adopt the application programming interface (API) and standard
protocols. This makes it easy for network carriers to develop new
services and realize new features.
SOHO
small office home office.
space
The place where no character or image is displayed on the computer
monitor or the paper.
specifications
Documents requirements for a process service system or product.
splitter
Filter that separates the high frequency signals (ADSL) from the
voiceband signals; (frequently called POTS splitter even though the
voiceband signals may comprise more than POTS).
startup
The process of starting or resetting a computer.
static route
A route that cannot adapt to the change of network topology.
Operators must configure it manually. When a network topology is
simple, the network can work in the normal state if only the static
route is configured. It can improve network performance and ensure
bandwidth for important applications. Its disadvantage is as follows:
When a network is faulty or the topology changes, the static route
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
528
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
does not change automatically. It must be changed by the operators.
station
A terminal, such as a laptop or a PC, with a wireless network
interface card (NIC).
stream
1. A succession of data elements made available over time. 2. Stream
refers to the directional logical path from one end to anther end in an
SCTP link.
sub-network
Sub-network is the logical entity in the transmission network and
comprises a group of network management objects. The network that
consists of a group of interconnected or correlated NEs, according to
different functions. For example, protection subnet, clock subnet and
so on. A sub-network can contain NEs and other sub-networks.
Generally, a sub-network is used to contain the devices which are
located in adjacent regions and closely related with one another, and
it is indicated with a sub-network icon on a topological view. The
U2000 supports multilevels of sub-networks. A sub-network planning
can better the organization of a network view. On the one hand, the
view space can be saved, on the other hand, it helps the network
management personnel focus on the devices under their management.
subnet
A large network can be divided into a number of smaller networks
according to a rule, for example, according to different districts. This
facilitates the management of the large network. In the topology view,
this type of a smaller network is termed subnet.
subnet mask
The technique used by the IP protocol to determine which network
segment packets are destined for. The subnet mask is a binary pattern
that is stored in the client machine, server or router and is matched
with the IP address.
subscriber
number
The number to be dialed or called to reach a telephone subscriber in
the same local network or numbering area.
subsystem
An element in a hierarchical division or an open system that interacts
directly with elements in the next higher division or the next lower
division of that open system.
supplementary
service
A service which modifies or supplements a basic telecommunication
service. A supplementary service must be offered together with or in
association with a basic telecommunication service. It includes: 1.
Call forwarding services 2. Call barring services 3. Line identification
services 4. Call completion services 5. Multiparty service 6.
Unstructured supplementary service data 7. Closed user group service
supported
connections
Connections that can be used.
swell fixture
A small cylindrical or tapered pin, as of wood, used to fasten things or
plug a hole.
switch unit
As a critical component of the main control unit, the switch unit is
also called the switch module (or switch network), with the functions
of switching, allocation, scheduling, and control for packets between
interface boards. Generally, the switch unit uses ASIC chips of high
performance to provide line rate forwarding for packets.
synchronize
To synchronize parameter settings on devices to the database of the
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
529
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
network management system.
A mechanism of the computer system to achieve connections between
devices. It is characterized by the signal transmission between two
devices on the bus. One device sends commands and data and the
other device receives commands and data. Only one transfer can be
operated on the bus at any time. Transfer requests of each device are
ranked according to their priorities
system bus
13.19 T
TCP
See Transmission Control Protocol
telecommunication
1. Communication by wire, radio, optical or other electromagnetic
systems. 2. Any transmission, emission or reception of signs,
signals, writing images and sounds or intelligence of any nature by
wire, radio, optical or other electromagnetic systems.
Telnet
Standard terminal emulation protocol in the TCP/IP protocol stack.
Telnet is used for remote terminal connection, enabling users to log
in to remote systems and use resources as if they were connected to a
local system. Telnet is defined in RFC 854.
terminal
A device that converts voice, sound, text, image, table, data and
video from physical display to electronic signals or from electronic
signals to physical display. A terminal generates and sends signals
(such as telecommunications circuit setup or release) that maintain
the normal running state of the telecommunications network, and it
receives the call signals of telecommunications switch and
transmission.
three-way calling
A service that allows a subscriber to add a third party to an activated
two-party call so that all the three parties can communicate in a
three-way call.
time sharing
A mode of operation of a data processing system that provides for
the interleaving in time of two or more processes in one processor.
Time
Synchronization
Also called the moment synchronization, time synchronization
means that the synchronization of the absolute time, which requires
that the starting time of the signals keeps consistent with the UTC
time.
time zone
A division of the earth's surface, usually extending across 15°of
longitude devised such that the standard time is the time at a
meridian at the center of the zone.
timeout
It refers to that an event is expected in a certain time. An event that
indicates that a predetermined amount of time has elapsed without
some other expected event taking place.
timer
Symbolic representation for a timer object (for example, a timer
object may have a primitive designated as T-Start Request). Various
MAC entities utilize timer entities that provide triggers for certain
MAC state transitions.
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
530
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
trace
Find out or describe how something started or developed.
track
To restore a trouble ticket (TT) by a service agent after the TT is
allocated to but not processed in the next stage.
traffic policing
It is a scheme that supervises the specific traffic entering the
communication devices. By policing the speed of traffic that enters
the network, it "punishes" the traffic out of the threshold, so the
traffic going into network is limited to a reasonable range, protecting
the network resources and the interests of the carriers.
transfer mode
A mode in which the AH or ESP is inserted behind the IP header but
ahead all transport layer protocols.
transmission
The transfer of information from one point to one or more other
points by means of signals. Notes: 1. Transmission can be effected
directly or indirectly, with or without intermediate storage. 2. The
use of the English word "transmission" in the sense of "emission" in
radiocommunication and of "sending" is deprecated.
Transmission
Control Protocol
The protocol within TCP/IP that governs the breakup of data
messages into packets to be sent using Internet Protocol (IP), and the
reassembly and verification of the complete messages from packets
received by IP. A connection-oriented, reliable protocol (reliable in
the sense of ensuring error-free delivery), TCP corresponds to the
transport layer in the ISO/OSI reference model.
transmission
performance
The reproducibility of a signal input to a telecommunications
network under given conditions. The given conditions may include
the effect of propagation performance where applicable.
transport network
layer
transport network layer, is defined as [G. 805] a topological
component solely concerned with the generation and transfer of
characteristic information.
troubleshooting
Troubleshooting is a form of problem solving. It is the systematic
search for the source of a problem so that it can be solved.
TX
The transmitting end of the interface that signals pass through.
13.20 U
UDP
See User Datagram Protocol
unlock
To free the locked goods so that they can be sold consumed or
transferred between departments.
upstream
In an access network, where there is a clear indication in each
deployment as to which end of a link is closer to a subscriber,
transmission toward the subscriber end of the link.
User Datagram
Protocol
A TCP/IP standard protocol that allows an application program on
one device to send a datagram to an application program on another.
User Datagram Protocol (UDP) uses IP to deliver datagrams. UDP
provides application programs with the unreliable connectionless
packet delivery service. UDP messages can be lost, duplicated,
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
531
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
delayed, or delivered out of order. UDP is used to try to transmit the
data packet, that is, the destination device does not actively confirm
whether the correct data packet is received.
13.21 V
VAD
See voice activity detection
video on demand
An interactive video service system through which you can demand
desired programs at any time. VoD is a communication technology
developed based on computer, telecommunication, and television
technologies.
virtual circuit
A channel or circuit established between two points on an ATM /a
network. Virtual circuits can be Permanent Virtual Circuits (PVCs) or
Switched Virtual Circuits (SVCs).
VoD
See video on demand
voice activity
detection
An algorithm used in speech processing wherein, the presence or
absence of human speech is detected from the audio samples. The
main uses of VAD are in speech coding and speech recognition. A
VAD may not just indicate the presence or absence of speech, but
also whether the speech is voiced or unvoiced, sustained or early, and
so on.
voice file
Various voice materials recorded or edited by users, for example, dial
tone, busy tone, ringing tone, and intelligence tone. These voice
materials generally require an analog-to-digital conversion to form a
voice file in PCM stream format.
voice mail service
A value-added service, when a service subscriber misses a call due to
the reason such as power off or busy, the calling party can leave a
message to the service subscriber, and then the system notifies the
service subscriber of the missed call by sending a short message (or a
multimedia message, Email).
voice mailbox
A new communications service that allows the voice data to be
converted into digital data and stored on a server, and then the user
can obtain the data stored on the server anytime at any place by using
a phone or by other means.
voice message
Voice Message refers to a message that could be sent to a destination
using voice media. Voice itself could be 'packaged' and sent through
the IP backbone so that it reaches its marked 'address'. In a technical
sense, the process of sending 'voice packets
volt
Basic unit of electrical potential. One volt is the force required to send
one ampere of electrical current through a resistance of one ohm.
WAN
See wide area network
13.22 W
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
532
eSpace EGW1520 Enterprise Gateway
Product Documentation
13 Glossary
web
A set of interlinked documents in a hypertext system.
wide area
network
A network composed of computers which are far away from each
other which are physically connected through specific protocols.
WAN covers a broad area, such as a province, a state or even a
country.
wireless fidelity
A short-distant wireless transmission technology. It enables wireless
access to the Internet within a range of hundreds of feet wide.
wireless local
area network
A hybrid of the computer network and the wireless communication
technology. It uses wireless multiple address channel as transmission
media and carriers out data interaction through electromagnetic wave
to implement the functions of the traditional LAN.
wireless terminal
A general term used for any mobile station, mobile terminal, personal
station or personal terminal, with which non-fixed access to the
network is used.
WLAN
See wireless local area network
zone
The collection of all terminals, gateways, and Multipoint Control
Units (MCUs) managed by a single gatekeeper. A zone has only one
gatekeeper. A zone is independent from the network topology and can
consist of multiple network segments connected using routing
equipment.
13.23 Z
Issue 01 (2012-05-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
533

---

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.6
Linearized                      : Yes
Author                          : Huawei Technologies Co.,Ltd.
Create Date                     : 2013:02:01 11:08:15+08:00
Modify Date                     : 2013:02:01 07:05:03+01:00
Subject                         : Technical Document
Tagged PDF                      : Yes
XMP Toolkit                     : Adobe XMP Core 4.2.1-c043 52.372728, 2009/01/18-15:08:04
Metadata Date                   : 2013:02:01 07:05:03+01:00
Creator Tool                    : Microsoft® Office Word 2007
Format                          : application/pdf
Description                     : Technical Document
Creator                         : Huawei Technologies Co.,Ltd.
Document ID                     : uuid:01c0ea90-22ae-4402-9886-3cc36787af2c
Instance ID                     : uuid:8cce9814-94b0-4d5c-b6ff-4756cfa09d84
Producer                        : Microsoft® Office Word 2007
Page Count                      : 185

EXIF Metadata provided by EXIF.tools