Huawei Technologies EGW1520A eSpace EGW1520 User Manual UserManual Part1

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eSpace EGW1520 Enterprise Gateway
V100R001C01
Product Documentation
Issue
01
Date
2012-05-15
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and
the customer. All or part of the products, services and features described in this document may not be
within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements,
information, and recommendations in this document are provided "AS IS" without warranties, guarantees or
representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute the warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address:
Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website:
http://www.huawei.com
Email:
support@huawei.com
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eSpace EGW1520 Enterprise Gateway
Product Documentation
1 Library Information
Library Information
About This Chapter
This topic describes the basic information about the EGW1520 document package, including
the reader information and change history.
1.1
Library Overview
This topic describes the main contents of each document in the library and the intended
audience and defines each type of audience.
1.2
Conventions
This topic describes the conventions in the document.
1.3
Change History
Updates between document issues are cumulative. Therefore, the latest document issue
contains all updates made in previous issues.
1.1 Library Overview
This topic describes the main contents of each document in the library and the intended
audience and defines each type of audience.
Library Structure
Table 1-1 describes all documents in the package.
Table 1-1 Library Structure
Topic
Description
Safety Precautions
The precautions for using and maintaining products.
Overview
This section describes the product position, networking,
appearance, functions, technical parameters, and Regulatory
Compliance Information.
Installation
This section describes how to install EGW1520.
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1 Library Information
Topic
Description
Features and
Implementation
This section describes EGW1520 features and how to
implement them.
Quick Configuration
This topic describes how to quickly configure the EGW1520.
After the EGW1520 is configured, it provides Internet access
and basic voice services.
Diagnosis modes
This section describes diagnosis modes for the EGW1520.
System Management
This section describes how to manage and maintain EGW1520
in different modes.
Security Maintenance
This section describes the concept and methods for maintaining
the EGW1520.
Troubleshooting
The troubleshooting processes of common faults and provides
typical troubleshooting cases of EGW1520.
Reference
This section describes Web parameter reference, TR-069
parameter reference and how to Customizing Voice Prompts
for the Switchboard.
Glossary
All terms in the product documentation.
Intended Audience
Table 1-2 describes the engineers that the documents are intended for.
Table 1-2 Definition of the intended audience
Intended Audience
Definition
Maintenance Engineer
Maintenance engineers have veteran experience in
telecommunications and databases, and are responsible for
adjusting service data configurations, rectifying faults, and
upgrading services.
Technical support
Engineer
Technical support engineers provide detailed technical support
for the equipment.
1.2 Conventions
This topic describes the conventions in the document.
Symbol Conventions
The following symbols may be found in this document. They are defined as follows.
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Symbol
1 Library Information
Description
Indicates a hazard with a high level of risk which, if not
avoided, will result in death or serious injury.
Indicates a hazard with a medium or low level of risk
which, if not avoided, could result in minor or moderate
injury.
Indicates a potentially hazardous situation that, if not
avoided, could cause device damage, data loss, and
performance degradation, or unexpected results.
Indicates a tip that may help you solve a problem or save
your time.
Provides additional information to emphasize or
supplement important points of the main text.
General Conventions
Convention
Description
Times New Roman
Normal paragraphs are in Times New Roman.
Boldface
Names of files, directories, folders, and users are in
boldface. For example, log in as user root.
Italic
Book titles are in italics.
Courier New
Terminal display is in Courier New.
Command Conventions
Convention
Description
Boldface
The keywords of a command line are in boldface.
Italic
Command arguments are in italic.
[]
Items (keywords or arguments) in square brackets [ ] are
optional.
{ x | y | ... }
Alternative items are grouped in braces and separated by
vertical bars. One is selected.
[ x | y | ... ]
Optional alternative items are grouped in square brackets
and separated by vertical bars. One or none is selected.
{ x | y | ... } *
Alternative items are grouped in braces and separated by
vertical bars. A minimum of one or a maximum of all
can be selected.
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1 Library Information
Convention
Description
[ x | y | ... ] *
Alternative items are grouped in braces and separated by
vertical bars. Several or none can be selected.
GUI Conventions
Convention
Description
Boldface
Buttons, menus, parameters, tabs, window, and dialog
titles are in boldface. For example, click OK.
Multi-level menus are in boldface and separated by the
">" signs. For example, choose File > Create > Folder.
Keyboard Operation
Format
Description
Key
Press the key. For example, press Enter and press Tab.
Key 1+Key 2
Press the keys concurrently. For example, pressing
Ctrl+Alt+A means the three keys should be pressed
concurrently.
Key 1, Key 2
Press the keys in turn. For example, pressing Alt, A
means the two keys should be pressed in turn.
Mouse Operation
Action
Description
Click
Select and release the primary mouse button without
moving the pointer.
Double-click
Press the primary mouse button twice continuously and
quickly without moving the pointer.
Drag
Press and hold the primary mouse button and move the
pointer to a certain position.
1.3 Change History
Updates between document issues are cumulative. Therefore, the latest document issue
contains all updates made in previous issues.
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Updates in draft Issue 01 (2012-03-14)
First commercial release.
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eSpace EGW1520 Enterprise Gateway
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2 Safety Precautions
Safety Precautions
Pay attention to the following precautions when installing and using the device.
Basic Requirements

Keep the device dry when storing, transporting, and using the device.

Take care to avoid collision when storing, transporting, and using the device.

The installation instructions provided should be followed.

In the event of a fault, contact the maintenance personnel. Do not open the device.

Any company or person cannot change the design of the structure or security without
permission.

Any changes to the device must be carried out by an authorized and suitably qualified
person with the permission of manufacturer.

This device must be used in compliance with the legal and regulatory requirements of the
country in which it is being used. Please respect the legal rights of others when using this
device.

This device should be installed by a suitably qualified person.

The device must be far away from heat sources. Do not place any objects on the device.
Ensure that the heat dissipation vents on are not blocked.

DO NOT Drop the device from a height of 80 cm or greater; this may damage the
device.

In the event of an electrical storm / lightning, turn off the power to the device and
remove cables to avoid damage to the device.

All the phone cables are only used indoors, or the lightning may damage the device.

Keep the power plug clean and dry to avoid risk of electric shock and other potential
risk.

Use the power supply adapter provided with this product.

When using this device with mains power, the power socket should be located close to
the device and should be easily accessible.

Keep your hands dry when plugging in or out the device cable.

When the device is not in use, the power should be turned off and the mains power cable
should be disconnected from the mains supply.
Usage Notice
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2 Safety Precautions

Keep water and other liquids away from the device. In the event of liquid coming into
contact with the device, disconnect from the power immediately. Remove all cables,
including network connections and power cables and contact your maintenance
personnel.

Never use damaged or old cables.

In the event of unusual behavior, such as smoke emitting from the device, unusual noises
or smells, disconnect from the mains power supply immediately, remove all the cables
connected to the device and contact an authorized maintenance personnel.

Care should be taken to prevent foreign objects from entering the device, with particular
attention being paid to the heat dissipation hole.

Please keep this device and accessories away from children.

The antennas and 3G USB label used for this device must be installed to provide a safety
distance of at least 20 cm from all persons.

Do not use the device where use of wireless devices is prohibited or may cause
interference or danger such as hospitals.

The radio waves generated by the device may interfere with the operation of electronic
medical devices. Use electrical medical device under the guidance of the professionals or
contact its manufacturer for the restrictions on the use of the device.
Cleaning Notice

Before cleaning, the device should be shut down and disconnected from the mains power
supply, removing all power and network cables.

Clean using a soft, dry cloth. Do not use liquid or aerosol cleaners on this device.
Environment Protection
Please comply to all legal and environmental requirements when disposing of obsolete
devices and packaging.
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eSpace EGW1520 Enterprise Gateway
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3 Overview
Overview
About This Chapter
This section describes the product position, networking, appearance, functions, technical
parameters, and Regulatory Compliance Information.
3.1
Product Positioning and Features
This topic describes the product positioning and features of the eSpace EGW1520.
3.2
Application Scenarios
3.3
Architecture
This topic describes the appearanceports, and indicators of the EGW1520.
3.4
Functions and Features
The EGW1520 provides rich functions and features to support voice services and data
services.
3.5
Operation and Maintenance
Users can manage the EGW1520 in the web management system and use the eSpace element
management system (EMS) to operate and maintain the EGW1520.
3.6
Technical Specifications, Standards, and Authentications
This topic describes the technical specifications, standards, and authentications of the
EGW1520.
3.1 Product Positioning and Features
This topic describes the product positioning and features of the eSpace EGW1520.
3.1.1 Product Positioning
eSpace EGW1500 is a multi-service access gateway that integrates applications such as voice,
data, and broadband connections and provides a complete access solution. It is an optimal
choice for Small Office Home Office (SOHO) users and small enterprises to establish an
integrated office network.
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The eSpace EGW1500 provides multiple uplink ports for networks in different uplink modes.
It also provides user ports to establish flexible office networks.
3.1.2 Highlights
This topic describes the product highlights of the EGW1520. With various services and ports,
the EGW1520 features cost-effectiveness, high reliability and security, easy deployment, and
simplified maintenance.
High Reliability and Security
The EGW1520's reliability reaches 99.99%, the mean time between failures (MTBF) is over
50 years, and the mean time to restore (MTTR) is less than 3 minutes.
The EGW1520 provides various mechanism such as dual-homing, power-off survival, local
survival, 3G access backup, and QoS to ensure the device reliability, and uses advanced
technologies such as VPN, URL filtering, NAT, and DMZ to improve network security.
Integration of Multiple Services
The EGW1520 integrates various functions such as broadband access, voice, routing, security,
wireless, firewall, and VPN. Multiple services can be deployed on the same node, which
significantly reduces the initial investment and long-term maintenance costs of the enterprise
network. The EGW1520 uses an advanced hardware platform and software architecture to
provide users with the integrated network solution with a minimum investment.
Various Ports
The EGW1520 provides various uplink ports for different networking scenarios, including
WAN, ADSL, USB, and FXO ports. The EGW1520 also provides diversified user ports such
as Wi-Fi, LAN, FXS port to set up flexible office networks.
Easy Installation and Maintenance
The EGW1520 is a relatively small box that can be placed on a desk or mounted on a wall.
The EGW1520 provides standard external ports that are clearly marked to facilitate
installation and cable connection. The EGW1520 uses standard connection parts and does not
require a dedicated installation tool.
Users can view and configure devices on Web pages. The web management system provides
step-by-step configuration guide for qiuck installation.
Efficient Remote Maintenance
The EGW1520 ensures the security of remote access. Users can access the EGW1520 through
an uplink port (WAN, ADSL, or 3G) to perform remote configuration and maintenance.
The EGW1520, complying with the TR-069 protocol, connects to the network management
server (such as the eSpace EMS) to enable management functions such as the software
version upgrade, configuration file backup and recovery, and device status monitoring.
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3.2 Application Scenarios
EGW1520 supports two application scenarios.

The EGW1520 provides a small-capacity solution integrating voice and broadband
services for small enterprises or SOHO users.

The EGW1520 provides a comprehensive access solution for small branches by
integrating with the eSpace UC solution.
3.2.1 Application of EGW1520 in SOHOs
The EGW1520 provides a small-capacity solution integrating voice and broadband services
for small enterprises or SOHO users.
Figure 3-1 shows the networking mode for the application of the EGW1520 in SOHOs.
Figure 3-1 Application of the EGW1520 in SOHOs
Uplink Mode
The EGW1520 supports three uplink access modes, namely, Asymmetric Digital Subscriber
Line (ADSL), Wide Area Network (WAN), and 3G, as shown in Figure 3-1.
The EGW1520 usually connects to an IP network through ADSL or WAN ports. When neither
ADSL or WAN port is available, users can use USB-based 3G data cards to connect to a 3G
network, to transmit voice and data streams (excluding fax data).
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The ADSL and WAN connections are two parallel modes, which cannot be used together or back up
each other.
Voice Application
The EGW1520 supports the IP PBX function. Users can use different terminals (such as
analog phones, fax machines, and IP phones) to connect to the EGW1520 for internal
communication. In addition, the EGW1520 acts as an agent to register users with the IMS or
NGN to implement outgoing calls and provide voice services.
The FXO/LINE port supports the power-off survival function. When the EGW1520
encounters a power failure, the analog phone can be connected to the PSTN through the
FXO/LINE port. In this way, the call function is still available even when the EGW1520 is
powered off.
Data Application
The EGW1520 can be used to set up an enterprise network in LAN or WLAN mode. LAN
users use the EGW1520 to connect to the Internet to use various services. The EGW1520 also
supports various data functions, such as WLAN, DNS, VLAN, DHCP, static routing, QoS,
NAT, VPN, URL filtering, DMZ, analog server, and MAC address filtering.
3.2.2 Enterprise Branch
The EGW1520 integrates various eSpace UC solutions and is deployed in small-sized
enterprise branches. As the network ingress, the EGW1520 provides a comprehensive access
solution for enterprise branches.
Figure 3-2 shows the networking mode for the application of the EGW1520 in enterprise
branches.
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Figure 3-2 Application of the EGW1520 in enterprise branches
Uplink Mode
The EGW1520 supports three uplink access modes, namely, ADSL, WAN, and 3G, as shown
in Figure 3-2.
The EGW1520 usually connects to an IP network through ADSL or WAN ports. When neither
ADSL or WAN port is available, users can use USB-based 3G data cards to connect to a 3G
network, to transmit voice and data streams (excluding fax data).
The ADSL and WAN connections are two parallel modes, which cannot be used together or back up
each other.
Voice Application
Users within the enterprise branches are registered with the SIP server on the central node of
the headquarters. The user numbers are allocated and synchronized to the EGW1520 by the
data synchronization server. In the eSpace UC solution, the SIP server on the central node of
the headquarters controls incoming and outgoing calls of enterprise branch users and provides
voice services for these users.
The EGW1520 supports the trunking gateway function to process incoming and outgoing
calls for the local PSTN. This function helps reduce enterprises' toll call costs.
The FXO1/LINE port supports the power-off survival function. When the EGW1520
encounters a power failure, the analog phone can be connected to the PSTN through the
FXO1/LINE port. In this way, the call function is still available even when the EGW1520 is
powered off.
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Local Survival
The EGW1520 registers with the active and standby servers at the same time. If the active and
standby SIP servers are both faulty, the EGW1520 switches to the local survival mode to
process intra-office calls as a local server. When the active or standby SIP server is restored,
the EGW1520 exits the local survival mode.
Data Application
The EGW1520 can be used to set up an enterprise network in LAN or WLAN mode. LAN
users use the EGW1520 to connect to the Internet to use various services. The EGW1520 also
supports various data functions, such as WLAN, DNS, VLAN, DHCP, static routing, QoS,
NAT, VPN, URL filtering, DMZ, analog server, and MAC address filtering.
3.3 Architecture
This topic describes the appearanceports, and indicators of the EGW1520.
3.3.1 Appearance
EGW1520 is a box-shaped device that can be placed on a desk or mounted on the wall.
Its dimensions (H x W x D) are 35 mm x 305 mm x 175 mm, as shown in Figure 3-3.
Figure 3-3 EGW1520 appearance
3.3.2 Ports and Buttons
This topic describes the EGW1520 ports and buttons.
Figure 3-4 shows the EGW1520 ports and buttons.
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Figure 3-4 EGW1520 ports
Figure 3-5 EGW1520 buttons
Table 3-1 describes the EGW1520 ports.
Table 3-1 EGW1520 ports and buttons
SN
Label
Quan
tity
Physical
Port and
Attribute
Function
ADSL
ADSL port
Connects to the peer Digital Subscriber
Line Access Multiplexer (DSLAM)
through a telephone line to access the
broadband network.
RJ-11
FXO1–4
FXO port
RJ-11
Enables phones connected to the
EGW1520 to make calls.
Enables the phone connected to PHONE1
to access the PSTN when the EGW1520
is powered off.
PHONE
POTS port

Connects to analog phones and fax
machines.

PHONE1 supports power-off survival.

One PHONE port can connect only
one analog phone.

User line length (diameter is 0.4 mm)
is equal to or less than 1 km.

PHONE ports are only used indoors.
RJ-11
Ports specifications
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SN
Label
USB
3 Overview
Quan
tity
Physical
Port and
Attribute
USB port
USB 2.0
WAN
WAN port
RJ-45
Function

The feed voltage is -48 V DC when an
analog phone is in the on-hook state.

The supply current is 25 mA when an
analog phone is in the off-hook state.

The value of EGW1520's ringing
power is 50Vrms.
Uses a 3G data card to connect to the 3G
network.
Connects to the broadband network in
WAN mode.
MDI-X
10/100/1000
Base-TX
Outdoor
network port
LAN1-4
LAN port
RJ-45
MDI-X
10/100BaseTX
Connects to Ethernet devices such as local
computers and IP phones to establish a
LAN.
When LAN ports connect to IP phones,
they are only used indoors.
Indoor
network port
12 V/2 A
Power
supply port
Connects to the power supply adapter to
provide power for the EGW1520.
Requirement: 12 V DC, 2 A.
ON/OFF
Power
switch
Switch for powering on and powering off
the EGW1520.
RESET
Reset button
Restores the factory settings if this button
is held down for more than six seconds.
Restarts the EGW1520 if this button is
held down less than six seconds.
10
WLAN
Wi-Fi
control
button
Enables the WiFi Protected Setup (WPS)
function if this button is held down for
more than six seconds.
NOTE
With the WPS function, the Wi-Fi terminal
starts to authenticate the WPS. If the
authentication exceeds two minutes, the
function is not enabled.
Enables or disables the WLAN function if
this button is held down for less than six
seconds.
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3.3.3 Indicators
This topic describes the EGW1520 indicators.
Figure 3-6 shows the names of EGW1520 indicators.
Figure 3-6 Names of the EGW1520 indicators
Table 3-2 describes the indicators on the EGW1520 front panel.
Table 3-2 Indicators on the EGW1520 front panel
Indicato
Indication
Description
POWER
Indicates the
power status.
Steady on: The EGW1520 is powered on.
Indicates the
ADSL connection
status.
Steady on: The ADSL connection has been established
and activated.
ADSL
Off: The EGW1520 is powered off.
Blinking: The ADSL connection is being activated.
Off: The EGW1520 is powered off or the ADSL
connection has not been established.
INTERN
ET
Indicates the
WAN or 3G
connection status.
Steady on: The EGW1520 works in routing mode and is
connected to the WAN, but no data is transmitted.
Blinking: The EGW1520 works in routing mode and is
connected to the WAN, and data is being transmitted.
Off: The EGW1520 works in bridge mode, works in
routing mode and is not connected to the WAN, or is not
powered on.
WLAN
Indicates the
WLAN power or
communication
status.
Steady on: The WLAN has been enabled but no data is
transmitted.
Blinking: The WLAN is enabled and data is being
transmitted.
Off: The EGW1520 is powered off or the Wi-Fi function
is disabled.
VOIP
Indicates the VoIP
status.
Steady on: At least one VoIP user is registered with the
SIP server and is in idle status.
Blinking: At least one VoIP user is working.
Off: The EGW1520 is powered off or the VoIP user
failed to be registered with the SIP server.
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Indicato
Indication
Description
PHONE
Indicates the
phone status.
Steady on: The analog phone is picked up.
Off: The EGW1520 is powered off or the analog phone is
hung up.
In addition to the indicators on the front panel, there is an indicator on each network port, as
shown in Table 3-3.
Table 3-3 EGW1520 indicators on the network port
Indicator
Description
Network port indicator
Steady on: The network port is properly connected.
Off: The network port is disconnected.
Blinking: Data is being transmitted.
3.4 Functions and Features
The EGW1520 provides rich functions and features to support voice services and data
services.
3.4.1 Voice Features
Voice Access
SIP Trunk
The SIP trunk supports the registration mode and static mode.
The EGW1520 supports only the SIP trunk in the registration mode. The SIP trunk sends a
registration message to the SIP server to set up a dynamic link.
After being registered to the IMS or NGN network using the SIP trunk, the EGW1520
processes internal calls and the SIP signaling for outer-office calls.
Common Mode
When functioning as a device on the access layer, the EGW1520 can register with the IMS or
NGN network using the SIP trunk and process SIP signalings. When functioning as the a
small IP-PBX device, the EGW1520 accepts registration of IP phones and supports call
control and protocol processing.

A maximum of 20 SIP users can be registered.

The EGW1520 provides four foreign exchange station (FXS) ports, connecting to a
maximum of four POTS users.
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
3 Overview
The EGW1520 supports a maximum of eight concurrent voice calls made by SIP users
and POTS users. The maximum number of POTS users varies according to codec
standard:
−
Four concurrent POTS calls for G.711 and G.729.
−
Two concurrent POTS calls for G.726 and G.722.
The EGW1520 voice services comply with the following standards:

G.711A, G.711u, G.729, G.726, and G.722

SIP (RFC 3261-3265)

SIP Session Timers (RFC 4028)

SDP (RFC 2327)

RTP/RTCP

RFC2833
UC Mode
The EGW1520 is used together with the eSpace UC solution. In UC mode, the EGW1520 can
be registered with multiple SIP servers at the same time. Phones connecting to the EGW1520
are registered with the SIP server on the central node at the headquarters. All calls are
processed by the SIP server at the headquarters.
When the EGW1520 is disconnected from the active and standby SIP servers, the EGW1520
automatically enters the local survival mode and functions as the local SIP server to accept
registration of internal users. The EGW1520 processes all calls.
The EGW1520 can function as the local PSTN landing gateway, implementing local incoming
and outgoing calls and helping reduce toll call fees.
Connecting to the PSTN Network
The EGW1520 provides one FXO port used to connect to the PSTN network. An intra-office
user dials the outgoing prefix and an outer-office user's number to make an outgoing call
through the FXO port. An outer-office user dials the number that the PSTN carrier allocates to
the FXO port to make an incoming call. The EGW1520 supports the switchboard and
dedicated line functions. By default, the switchboard function is enabled.

The EGW1520 supports one FXO port.

The FXO port supports only the one-stage dialing mode.

Only one call can be made through the FXO port at a time.
Voice Services
This topic describes the voice services supported by the EGW1520. Table 3-4 lists these voice
services.
Table 3-4 Voice services
Type
Service
Voice service
Calling line identification presentation (CLIP)
Switchboard service
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3 Overview
Service
Private line service
Call pickup
Call waiting
Three-way calling
Call forwarding unconditional (CFU)
Call forwarding busy (CFB)
Call forwarding on no reply (CFNR)
Anonymous call
Called number presentation
Called number presentation restriction
Do not disturb (DND)
Night service
Call hold
Malicious caller identification
Call history
Call transfer
Outgoing call barring
Call back on busy (CBB)
Voice message
Message notification
Message retrieval
CLIR rejection
Automatic call rejection
Fax service
T.30 and T.38 fax services
Fixed mobile convergence
(FMC) service
Simultaneous ringing
Sequential ringing
Call switch
Voice message
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Voice QoS
This topic describes the voice QoS policies supported by the EGW1520.
VAD
Voice activity detection (VAD) is a technology used in speech coding and speech recognition
where the presence or absence of human speech is detected. The VAD avoids unnecessary
coding and transmission of silence packets in Voice over Internet Protocol (VoIP) applications,
saving computation and network bandwidth.
CNG
Comfort noise generator (CNG) is used with VAD. When the VAD function is enabled and no
packets are sent during the silent period, the listener may think that the call has disconnected.
To avoid this, the EGW1520 enables the CNG function on the receiver end. The EGW1520
CNG technology complies with RFC3389.
EC
Echo cancellation (EC) is a process of removing echo from a voice communication to
improve voice quality on a telephone call. In addition to improving subjective quality, this
process increases the capacity achieved through silence suppression by preventing echo from
traveling across a network. The EGW1520 EC technology complies with ITU-T G.168.
PLC
Packets are often lost on the connectionless IP network as a result of network congestion,
buffer area spillover, or error codes. A packet loss compensation (PLC) algorithm is used to
minimize the effects of packet loss. Lost frames can be reconstructed during decoding based
on the voice context, which ensures the quality of the received voice.
Jitter Buffer
With the jitter buffer function enabled, received packets can be buffered and then retrieved
and processed to remove jitter.
Reliability
The EGW1520 provides various technologies to ensure voice communication reliability.
Multi-SIP Registration–DR Mechanism in a Small Branch
Multi-SIP registration is a disaster recovery (DR) mechanism for emergencies, which is used
to avoid SIP server breakdown. Functioning as a voice access device in small branches, the
EGW1520 can register with two SIP servers at the same time. When the active SIP server is
faulty, the EGW1520 switches services to the standby SIP server. When the active SIP server
is recovered, the EGW1520 switches services to the active SIP server.
Power-off Survival
The EGW1520 provides an FXO port for power-off survival. When the EGW1520 is powered
off, the POTS phone connected to the PHONE port is automatically connected to the FXO
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port to access the PSTN, which allows the EGW1520 to still support basic voice services
during power-off.
Local Survival
Functioning as a voice access device in small branches, the EGW1520 supports local survival.
When the EGW1520 detects that the central node in the headquarters is disconnected from the
SIP server, the EGW1520 processes local calls.
3.4.2 Data Features
The EGW1520 provides rich data services to meet requirements of different users.
ADSL
The EGW1520 can connect to an upstream network through the ADSL port. ADSL is an
asymmetric transmission technology. It uses high frequencies that are not used by voice phone
calls and several modulation methods to achieve high-speed data transmission.

The routing and bridging connection types are supported.

The EGW1520 can use a static IP address or use DHCP or Point-to-Point Protocol over
Ethernet (PPPoE) to obtain a dynamic IP address.

Two Point-to-Point Protocol (PPP) authentication modes are supported, including
Password Authentication Protocol (PAP) and Challenge Handshake Authentication
Protocol (CHAP).

The ADSL Seamless Rate Adaptation (SRA) technology is supported.

The voice service and the data service must use the same ADSL Permanent Virtual
Circuits (PVC) channel.

The EGW1520 can connect to an IP network through the ADSL or WAN port. The
ADSL and WAN ports cannot be used at the same time or back each other up.
WAN Port
The EGW1520 can connect to an IP network through the WAN port. The ADSL and WAN
ports cannot be used at the same time or back each other up.

The EGW1520 provides a 10/100/1000 Mbit/s self-adaptive WAN port.

The EGW1520 can use a static IP address or use DHCP or PPPoE to obtain a dynamic IP
address.

The WAN port automatically chooses a work mode between the full-duplex and
half-duplex modes. The duplex mode cannot be manually configured.

The EGW1520 can connect to an IP network through the ADSL or WAN port. The
ADSL and WAN ports cannot be used at the same time or back each other up.
3G
Generally, the EGW1520 connects to an IP network through the ADSL or WAN port. If a 3G
data card is inserted into the USB port, the EGW1520 can also connect to a 3G network using
the 3G data card. The 3G network connection supports voice (except the fax service) and data
services.

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Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) data cards:
−
Huawei ET302 (software version: 11.100.05.00.00)
−
Huawei ET127 (software version: 11.101.01.36.00)
Wideband Code Division Multiple Access (WCDMA) data cards:

−
Huawei K3765 (software version: 11.126.03.06.00)
−
Huawei E176G (software version: 11.126.03.02.00)
The 3G network connection can be used as a backup network connection when no ADSL
or WAN connection is available, and does not support fax, DMZ host, and virtual server
functions.
Static Routes
Users can manually configure static routes on the EGW1520. Proper static routes improve the
network performance and ensure that important network application obtain required
bandwidth.
LAN Ports
Terminals such as PCs and IP phones can connect to the EGW1520 through LAN ports to
establish a small LAN. Functions such as file management, application sharing, printer
sharing, scheduling in a work group, email, and fax can be implemented in the LAN.

The EGW1520 provides eight 10/100Mbit/s self-adaptive LAN ports.

The default IP address for accessing the EGW1520 through LAN ports is 192.168.1.1
and the default the subnet mask is 255.255.255.0.

The EGW1520 can function as a DHCP server and assign IP addresses to data terminals
such as PCs and IP phones connected to the EGW1520 through LAN ports.
WLAN
The EGW1520 supports Wi-Fi services and wireless networking. It provides an integrated
network solution that covers both wired and wireless networking for small enterprises.

IEEE 802.11b/g/n is supported.

A maximum of 16 Wi-Fi terminals can connect to the EGW1520 at the same time.

Four Service Set Identifiers (SSIDs) can be configured and the EGW1520 supports SSID
broadcasting or hiding.

The MAC address filtering function is supported. A maximum of 16 MAC addresses can
be added to the list of MAC addresses that are allowed to connect to the EGW1520.

The Wi-Fi bridging function is not supported.
DNS
DNS allows users to specify meaningful domain names for network devices. The EGW1520
can function as a DNS client and use DNS servers to resolve domain names.
VLAN
The VLAN technology is used to divide a LAN into multiple logical LANs, that is, multiple
VLANs. Each VLAN is a broadcast domain. Hosts in the same VLAN communicate with
each other the same as they are in the same LAN. Hosts in different VLANs cannot
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communicate with each other directly. The EGW1520 supports port-based VLANs. LAN
ports are added to different VLANs so that users are separated and virtual work groups are
created.

A maximum of eight VLANs can be created.

Only port-based VLANs are supported.
DHCP
DHCP is a protocol for dynamically managing and configuring users in a centralized manner.
It uses the Client/Server structure. A DHCP client sends the DHCP server a request to apply
for parameter settings, including the IP address, subnet mask, and default gateway. The
EGW1520 can function as a DHCP server, DHCP relay, or DHCP client.

As a DHCP server, the EGW1520 provides a configurable address pool. In the default
address pool, IP addresses ranges from 192.168.1.2 to 192.168.1.254.

As a DHCP relay, the EGW1520 complies with RFC3361.

As a DHCP client, the EGW1520 supports Option42/43/60/61/66/67/120/125/150.
3.4.3 QoS
The EGW1520 provides a complete QoS mechanism to ensure that core services are allocated
with sufficient bandwidth resources.
QoS policies can be customized to ensure precedence of core services. In addition, the
EGW1520 limits bandwidth for common services (such as web-based upload) and saves it for
core services (such as voice streams). The EGW1520 supports the following Diff-Serv-based
QoS technologies: priority mark, congestion management, and traffic policing.

802.1p/q priority can be marked in VLAN tags.

The Differentiated Services Code Point (DSCP) priority can be marked.

The bandwidth control can be performed on upstream data streams.

Voice packets can be listed in the queue of high priorities and be transferred in a higher
priority.
3.4.4 Security
The EGW1520 provides rich security functions to ensure the security of calls and transferred
data.
NAT
NAT is the process of converting a private IP address in an IP packet header to a public IP
address. This function enables computers with private IP addresses to connect to a public
network. NAT solves the problem of insufficient public IP addresses and prevents attacks
from other networks, hiding and protecting computers on the private network.
A maximum of 1024 NAT entries are supported.
SIP ALG
NAT is the technology for converting private IP addresses to public IP addresses, and allows
one or more hosts on the private network to use the same the public IP address to access a
public network. NAT works in the transport layer, and is transparent to the application layer.
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This brings a great challenge SIP applications. The EGW1520 supports SIP Application Layer
Gateway (ALG) that solves the SIP NAT traversal problem.
Incoming Packet Filtering
If the firewall is enabled on the LAN or WAN side, all packets sent to the EGW1520 through
LAN ports or the WAN port are blocked. The incoming packet filtering function allows
specific packets to access the EGW1520. For example, if the firewall is enabled on the LAN
side, voice and data packets cannot access the EGW1520 through LAN ports. Users can
configure the incoming packet filtering function to allow voice packets to access the
EGW1520.
Outgoing Packet Filtering
By default, the EGW1520 does not block any outgoing packets sent from LAN ports. Users
can configure the outgoing packet filtering function to prevent specific packets from being
sent from LAN ports.
MAC Address Filtering
If the ADSL service type is set to Bridge, users can configure the MAC address filtering
function to prevent the ADSL port from sending certain data frames.
URL Filtering
The EGW1520 supports URL filtering, controlling the access to URLs effectively.

A maximum of 100 URLs can be filtered.

The maximum length of a URL is 128 bytes.

Partial match and full match are supported.

Filtering rules that use wildcard characters are not supported. For example, users cannot
use the asterisk (*) to represent full match.
Virtual Server
The virtual server function allows external networks to access servers on private networks.
These servers can provide services such as web access and FTP download, which allows
public servers to be established on private networks.
This function is not supported when the 3G access mode is used.
DMZ
The virtual server function allows external networks to access servers on private networks. If
there are many services running on private network servers, multiple virtual servers must be
configured. The configuration process is complicated. The DMZ function simplifies the
configuration process. Only IP addresses of the DMZ servers must be configured.

One DMZ host is supported.

This function is not supported when the 3G access mode is used.
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IPSec VPN
The EGW1520 can function as the access gateway for a small branch, and connect to the
headquarters through the IPSec VPN channel, implementing secure access.
The EGW1520 uses IPSec to establish a VPN channel to the headquarters in Site-to-Site
tunnel encapsulation mode. As the initiator of the VPN channel, the EGW1520 can use the IP
address of the peer device as the ID.
Configuration File Encryption
The EGW1520 encrypts the configuration file and sensitive data such as user names and
passwords in the file.
The EGW1520 encrypts the following items:

User name and password for logging in to the web management page.

PPPoE user name and password

PPPoA user name and password

Password for connecting to the WLAN

User name and password for connecting to the 3G network

TR-069 ACS user name and password

SIP user name and password

Password for connecting to the NTP server

Password in the VPN shared key mode
The configuration file cannot be modified manually.
HTTPS
Users can safely transmit information between the web browser and EGW1520 using HTTPS
protocol.
3.5 Operation and Maintenance
Users can manage the EGW1520 in the web management system and use the eSpace element
management system (EMS) to operate and maintain the EGW1520.
3.5.1 Web-based Management
Users can configure, diagnose, and upgrade the EGW1520 in the web management system.
The HTTPS and HTTP protocols are supported.
Figure 3-7 shows the main page of the EGW1520 web management system.
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Figure 3-7 Main page of the EGW1520 web management system
3.5.2 Unified Network Management
TR-069 is a DSL forum technical specification entitled CPE WAN Management Protocol
(CWMP). It defines an application layer protocol for remote management of end-user devices.
Huawei eSpace EMS uses TR-069 to manage and maintain the EGW1520 remotely.
TR-069 is used to upgrade versions, back up files, and restore configurations. Huawei eSpace
EMS supports the following data models:

TR-98 data model

TR-104 data model
For details about Huawei eSpace EMS, see the eSpace EMS Documentation.
3.6 Technical Specifications, Standards, and
Authentications
This topic describes the technical specifications, standards, and authentications of the
EGW1520.
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3.6.1 Technical Specifications
This topic describes EGW1520 technical specifications such as dimensions, weight, power
supply, consumption, and running environment.
EGW1520 parameter table show in Table 3-5 is displayed.
Table 3-5 EGW1520 parameters
Item
Specification
Dimensions (L x W x
H)
305 mm x 175 mm x 35 mm
Weight
1 kg (device weight, without the power adapter and other
accessories)
Maximum power
24 W
Power supply
12 V DC, 2 A
Power supply adapter
Input: 100–240 V AC, 1.0 A, 50 or 60 Hz
Output: +12 V DC, 2 A
Maximum transmit
power of Wi-Fi
802.11b/g/n (SISO): 16±2 dBm
Long-term operating
temperature
0°C-40°C
Long-term operating
humidity
5%-95% (non-condensing)
Altitude
≤ 4 km
Atmospheric pressure
70 -106 kPa
802.11n (MIMO): 18±2 dBm
3.6.2 Standards
This topic describes the standards that the EGW1520 complies with.
Table 3-6 Standards compliance
Service Name
Standard Name
Standard Version
ADSL/ADSL2/
ADSL2+/Anne
xM
ITU-T G.992.1 Annex A
ITU-T G.992.1 (06/1999)
ITU-T G.992.3 (ADSL 2) Annex A,
L and M
ITU-T G.992.3 (01/2005)
ITU-T G.992.5 (ADSL 2+) Annex
A,M
ITU-T G.992.5 (01/2005)
Seamless Rate Adaption
ITU-T G.992.3 (01/2005)
Encapsulation: PPPoE and PPPoA
PPPoE-RFC 2516 (February
1999)
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Service Name
3 Overview
Standard Name
Standard Version
PPPoA-RFC 2364 (July 1998)
WiFi
IEEE 802.11 b/g/n
IEEE 802.11b-1999
IEEE 802.11g-2003
IEEE 802.11n-2009
IP
Requirements
MAC Address (IEEE 802.3)
IEEE 802.3-2002
IPv4 Internet Protocol v4 (RFC
791)
IP Version 4-RFC 791
(September 1981)
ARP Address Resolution Protocol
(RFC 826)
RFC 826 (November 1982)
ICMP Internet Control Message
Protocol (RFC792)
RFC 792 (September 1981)
TCP Transmission Control Protocol
(RFC793)
RFC 792 (September 1981)
UDP User Datagram Protocol
(RFC768)
RFC 768 (August 1980)
RTP Real-Time Protocol (RFC
3550) (RFC 3551)
RTP Version 2-RFC 3550 (July
2003)
RFC 3551 (July 2003)
RTCP Real Time Control Protocol
(RFC 3550)
RTCP-RFC 3550 (July 2003)
An Ethernet Address Resolution
Protocol (RFC 826)
RFC 826 (November 1982)
A Standard for the Transmission of
IP Datagrams over Ethernet
Networks (RFC 894)
RFC 894 (April 1984)
A Standard for the Transmission of
IP Datagrams over IEEE 802
Networks (RFC 1042)
RFC 1042 (February 1988)
DHCP (RFC 2131)
RFC 2131 (March 1997)
VLAN tagging 802.1 p/q
IEEE802.1 Q-2003
Timing
NTP (RFC 1305)
NTP Version 3-RFC1305 (March
1992)
SIP Protocol
RFC 3323
RFC 3323 (November 2002)
RFC 3325
RFC 3325 (November 2002)
RFC 3515 – Refer method
RFC 3515 (April 2003)
RFC 3891 – Replaces header
RFC 3891 (September 2004)
RFC 3261
SIP Version 2.0-RFC 3261 (June
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Service Name
3 Overview
Standard Name
Standard Version
2002)
RFC 3262
RFC 3262 (June 2002)
RFC 3264
RFC 3264 (June 2002)
RFC 3455
RFC 3455 (January 2003)
SIP Session
Timers
RFC 4028
RFC 4028 (April 2005)
SIP locating
Servers
RFC 3263 for SIP over UDP
RFC 3263 (June 2002)
P-CSCF
Discovery
DHCP method – RFC 3361
RFC 3361 (August 2002)
DNS Client
DNS for IPv4
CLIP/CLIR
RFC 3323
RFC 3323 (November 2002)
RFC 3325
RFC 3325 (November 2002)
Message
Waiting
Indication
RFC 3842
RFC 3842 (August 2004)
RFC 3265
RFC 3265 (June 2002)
Event
Notification
RFC 3265
RFC 3265 (June 2002)
NAT Traversal
NAT Traversal (RFC 3947)
NAT for IPv4-RFC 3947
(January 2005)
Codec
G.711 A-Law
None
G.711 μ-Law
None
G.729 Annex A (must include
annexb=no)
None
G.729 Annex B
None
G.726 (optional)
None
G.722
None
T.38
ITU-T T.38 (09/2005)
T.30 over G.711
ITU-T T.30 (09/2005)
Comfort Noise
Generation
RFC 3389
RFC 3389 (September 2002)
Echo
Cancellation
G.168
ITU T G.168 (08/2004)
DTMF
RFC 2833
RFC 2833 (May 2000)
CPE
Provisioning
TR-069
TR-069 v1.1, Amendment 2
(December 2007)
Fax
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Service Name
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Standard Name
Standard Version
TR-104
TR-104 (September 2005)
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4 Installation
Installation
About This Chapter
EGW1520 is a box-shaped device. This topic describes how to install EGW1520.
4.1
Checking the Installation Environment
Before installation, check the installation environment.
4.2
Unpacking Check
You need to check the received equipment according to the packing list and check whether all
the materials (such as hosts, cables, and CD-ROMs) are complete and undamaged.
4.3
Preparing Installation Tools
This topic describes the tools for installing the EGW1520 on the wall. If you want to install
the EGW1520 on a horizontal surface, place it on the surface.
4.4
Installing EGW1520
Install EGW1520 on a horizontal surface or on the wall.
4.5
Connecting Cables
This topic describes how to connect cables for the EGW1520.
4.6
Powering On the EGW1520
After cables are connected, press the power button to power on the EGW1520. View the
indicators and verify that the EGW1520 is working properly.
4.1 Checking the Installation Environment
Before installation, check the installation environment.
Table 4-1 lists the major check items in the installation environment.
Table 4-1 Major check items in the installation environment
Item
Requirement
Damppr
Working humidity: 5%-95% relative humidity (RH), no condensing. The
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Item
Requirement
oof
dehumidifier devices such as air conditioners with the dehumidifier function and
special dehumidifiers must be installed in the equipment room where the
relative humidity is higher than 95%. Water seepage, dripping, and dew
condensation are forbidden in the room.
Dustpro
of
If the equipment room is close to a dust source, such as a coal mine, a country
road or a farmland, install aluminum alloy windows and fireproofing doors.
Lightpr
oof
Place the device in an environment without direct and strong sunlight.
Interven
tion-pro
of
Prevent interference caused by other radio devices such as WLAN APs within
50 m. Place the device at the center of the working area by considering the
WLAN coverage range. Install the antennas vertically to get the best WLAN
performance.
AC
power
Stable AC power supply (220 V) must be provided indoors and meets power
supply requirements (600 W).
Heat
dissipati
on
Place the device in an environment with good ventilation and without heat
sources. Leave more than 10 cm space for heat dissipation at the top and all four
sides of the device.
4.2 Unpacking Check
You need to check the received equipment according to the packing list and check whether all
the materials (such as hosts, cables, and CD-ROMs) are complete and undamaged.
Table 4-2 Packing list
Item
Qu
ant
ity
Remarks
eSpace EGW1520 including
antennas
Power supply adapter
12V,2A
Asymmetric digital subscriber line
(ADSL) splitter
Analog phone line
Straight-through network cable
A straight-through network cable is 2 meters
long.
Swell fixtures
Swell fixtures are used to install the EGW1520
on the wall.
Document and CD-ROM
eSpace EGW1520 Enterprise Gateway
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Item
4 Installation
Qu
ant
ity
Remarks
& Warranty Disclaimer and Written Offer.
eSpace EGW1520 Enterprise
Gateway Quick Start
Qualification Card and Declaration on
Hazardous Substances in Electronic
Information Products.
If any material is damaged or lost, contact the local merchant.
4.3 Preparing Installation Tools
This topic describes the tools for installing the EGW1520 on the wall. If you want to install
the EGW1520 on a horizontal surface, place it on the surface.
Table 4-3 Installation tools
Phillips screwdriver
Claw hammer
Hammer drill
Level ruler
4.4 Installing EGW1520
Install EGW1520 on a horizontal surface or on the wall.
Context
Installing EGW1520 on a horizontal surface is easy. You only need to place it on the surface
and leave 10 cm space around for heat dissipation. This topic describes how to install
EGW1520 on the wall.
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When installing EGW1520 on the wall, do not drop it to prevent damage.
Procedure
Step 1 Mark installation holes on the wall.
Mark an installation hole, and use a level ruler to measure a distance of 150 mm and mark the
second hole.
Step 2 Drill holes.
Choose a drill bit (diameter 4mm) on EGW1520's rear panel. Drill two holes on the marked
positions.
Step 3 Fix the swell fixtures.
Use a claw hammer to strike the two M4 swell fixtures to the holes, and use a Phillips
screwdriver to tighten them. Ensure that 5 mm of the swell fixtures is exposed for mounting
EGW1520.
Step 4 Mount EGW1520 on the wall.
Mount EGW1520 to the exposed swell fixtures.
Figure 4-1 shows how to mount EGW1520 on the wall.
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Figure 4-1 Mounting EGW1520 on the wall
----End
4.5 Connecting Cables
This topic describes how to connect cables for the EGW1520.
Select a cable connection mode based on the site requirements. Figure 4-2 and Figure 4-3
show the cable connection modes.
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Figure 4-2 ADSL access
The ADSL splitter separates voice and data signals. You can connect the splitter to ADSL and
FXO ports of the EGW1520 or connect ADSL ports on user devices to the ADSL port of the
EGW1520.
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Figure 4-3 WAN access

The EGW1520 provides four LAN interfaces, which can connect to terminals such as computers and
IP phones. To use more than four LAN interfaces, connect the EGW1520 to an Ethernet switch or
hub.

The EGW1520 provides one POTS interfaces (PHONE ), which can connect to analog phones or fax
machines. To use more than one POTS interfaces, connect the EGW1520 to an IAD.
4.6 Powering On the EGW1520
After cables are connected, press the power button to power on the EGW1520. View the
indicators and verify that the EGW1520 is working properly.
Before pressing the power button, ensure that all cables are connected correctly to the ports.
Figure 4-4 shows the location of the power button. If the POWER indicator is on, the
EGW1520 works properly.
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Figure 4-4 Power button
Check the indicator status after the device is powered on. Table 4-4 and Table 4-5 describe the
indicators and what they mean.
Table 4-4 Indicators on the EGW1520 front panel
Indicato
Indication
Description
POWER
Indicates the
power status.
Steady on: The EGW1520 is powered on.
Indicates the
ADSL connection
status.
Steady on: The ADSL connection has been established
and activated.
ADSL
Off: The EGW1520 is powered off.
Blinking: The ADSL connection is being activated.
Off: The EGW1520 is powered off or the ADSL
connection has not been established.
INTERN
ET
Indicates the
WAN or 3G
connection status.
Steady on: The EGW1520 works in routing mode and is
connected to the WAN, but no data is transmitted.
Blinking: The EGW1520 works in routing mode and is
connected to the WAN, and data is being transmitted.
Off: The EGW1520 works in bridge mode, works in
routing mode and is not connected to the WAN, or is not
powered on.
WLAN
Indicates the
WLAN power or
communication
status.
Steady on: The WLAN has been enabled but no data is
transmitted.
Blinking: The WLAN is enabled and data is being
transmitted.
Off: The EGW1520 is powered off or the Wi-Fi function
is disabled.
VOIP
Indicates the VoIP
status.
Steady on: At least one VoIP user is registered with the
SIP server and is in idle status.
Blinking: At least one VoIP user is working.
Off: The EGW1520 is powered off or the VoIP user
failed to be registered with the SIP server.
PHONE
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Indicates the
phone status.
Steady on: The analog phone is picked up.
Off: The EGW1520 is powered off or the analog phone is
hung up.
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Table 4-5 EGW1520 indicators on the network port
Indicator
Description
Network port indicator
Steady on: The network port is properly connected.
Off: The network port is disconnected.
Blinking: Data is being transmitted.
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5 Quick Configuration (UC Mode)
Quick Configuration (UC Mode)
This topic describes how to quickly configure the EGW1520 in UC mode. After the
EGW1520 is configured, it provides Internet access and basic voice services.
Table 5-1 describes the EGW1520 configuration items.
Table 5-1 Quick configuration (UC mode)
Configuration Item
Country
Internet
access
Voice
configurati
on
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
China

Ireland

New
Zealand

Other
Description
Select the country where you are.
Internet
access
mode
ADSL or WAN.
WLAN
function
Configure the WLAN function and set a password to access the
WLAN.
Data
synchroniz
ation
server
Set data synchronization server parameters, such as the IP
address, port number, and synchronization key.
SIP server
Set parameters of the SIP server at the headquarters. The
parameters include the address and port number.
FXO
Set an outgoing prefix and determine whether to delete the
outgoing prefix for outgoing calls.
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5 Quick Configuration (UC Mode)
Prerequisites
You have logged in to the web management system. For the login operations, see 7.7.1 Web
Management.
Procedure
Step 1 On the web management system, choose Quick Setup from the navigation tree.
The page shown in Figure 5-1 is displayed.
Figure 5-2 Selecting a country
Step 2 Select the country where you are, and click
The page shown in Figure 5-2 is displayed.
Figure 5-3 Configuring the network
Step 3 Configure the network.
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5 Quick Configuration (UC Mode)
After you click one of the following links, the corresponding configuration procedure is
displayed.

ADSL

WAN
If ADSL is selected, the configuration procedure is as follows:
1.
Set parameters according to Table 5-2.
Table 5-2 Network parameters
Parameter
Description
PVC Identifier
(VPI)
Virtual path identifier (VPI). The value is provided by the network
carrier.
PVC Identifier
(VCI)
Virtual channel identifier (VCI). The value is provided by the
network carrier.
PPPoE user name
User name used to access the network. The value is provided by the
network carrier.
PPPoE Password
Password used to access the network. The value is provided by the
network carrier.
WLAN
Whether to enable the WLAN function. This function is enabled by
default.
SSID
ID of the EGW1520. The ID is displayed on a Wi-Fi terminal after
the terminal finds the EGW1520.
WPA-PSK/WPA2
-PSK Key
Password used to access the WLAN. The password is encrypted
through Wi-Fi protected access II-pre-shared key (WPA2-PSK) and
WPA-PSK. The EGW1520 uses the PSK to encrypt all
communication, which prevents unauthorized listening and access.
2.
Click
The page shown in Figure 5-3 is displayed.
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Figure 5-4 Network configuration complete
3.
Click
To save the configuration and exit, click
If WAN is selected, the configuration procedure is as follows:
1.
Click WAN on the page shown in Figure 5-2. Set parameters according to Table 5-3.
Table 5-3 Network parameters
Parameter
Description
PPPoE
Indicates that Point-to-Point Protocol over Ethernet (PPPoE) is
used.
Static IP
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
PPPoE User Name: user name used to access the network.
The value is provided by the network carrier.

PPPoE Password: password used to access the network. The
value is provided by the network carrier.
Indicates that the static IP address of the EGW1520 is used. The
setting must be the same as that on the Broadband Remote
Access Server (BRAS) of the network carrier.

WAN IP Address: IP address used to access the network. The
value is provided by the network carrier.

WAN Subnet mask: subnet mask. The value is provided by
the network carrier.The default value is 255.255.255.0.

WAN gateway IP Address: IP address of the gateway. The
value is provided by the network carrier.

Primary DNS server: IP address of the primary DNS server.
The value is provided by the network carrier.

Secondary DNS server: IP address of the secondary DNS
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Parameter
Description
server. The value is provided by the network carrier.
DHCP
As a DHCP client, the EGW1520 obtains the IP address from
the DHCP server. The IP address must be the same as that on the
BRAS of the network carrier.
WLAN
Indicates whether to enable the WLAN function. This function is
enabled by default.
SSID
Indicates the ID of the EGW1520. The ID is displayed on a
Wi-Fi terminal after the terminal finds the EGW1520.
WPA-PSK/WPA2-PSK
Key
Indicates the password to access the WLAN. The password is
encrypted through Wi-Fi protected access II-pre-shared key
(WPA2-PSK) and WPA-PSK. The EGW1520 uses the PSK to
encrypt all communication, which prevents unauthorized
listening and access.
2.
Click
The page shown in Figure 5-4 is displayed.
Figure 5-5 Configuration result
3.
Click
To save the configuration and exit, click
Step 4 Configure the voice.
1.
Click Enable for UC Mode, and click
The page shown in Figure 5-5 is displayed.
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5 Quick Configuration (UC Mode)
Figure 5-6 Configuring the SIP server when the UC mode is enabled
UC Mode is set to Disable before the device is delivered. The synchronized user data is cleared when
the system changes from the UC mode to the common mode.
2.
Set parameters according to Table 5-4.
Table 5-4 SIP server parameters
Parameter
Description
IP
IP address of the data synchronization server. The value is provided by
the enterprise IT administrator.
Port
Port number of the data synchronization server. The value is provided
by the enterprise IT administrator. If it is not provided, use the default
value 8098.
DataSync Key
Data synchronization key. When the EGW1520 synchronizes data with
the data synchronization server, the synchronization keys of the
EGW1520 and the data synchronization server must be the same.
Otherwise, the EGW1520 denies data synchronization. The value is a
string of 1 to 32 characters that can be digits, letters, and special
characters. For the detailed configuration rule, contact the enterprise IT
administrator.
Working Mode

Master: active server. The server that is added first is the active
server.

Slave: standby server.
OptionInterval
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Interval for sending heartbeat detection messages to the active and
standby server. The value ranges from 30 to 150, in seconds. The
default value 90 is recommended.
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Parameter
Description
Address Type
IP address or DNS mode. The value is provided by the enterprise IT
administrator.
IP/Domain
IP address or DNS domain name of the SIP server. The value is
provided by the enterprise IT administrator.
DNS Type
IP address parsing mode of the DNS. This parameter is valid when
Address Type is set to Domain.

SRV: A domain name can be mapped to multiple IP addresses. The
two IP addresses of the highest priority are used as the IP addresses
of the active and standby SIP servers.
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
SIP network type inside the enterprise. Generally, set the network type
to NGN if the eSpace U1900 is used or IMS if the eSpace U2900 is
used. For details, contact the enterprise IT administrator.
Port
Port number of the SIP server. The value is provided by the enterprise
IT administrator. If it is not provided, use the default value 5060.
Expiration Time
Interval for the registration group to register POTS users in the group
with the SIP server. The value ranges from 0 to 14400, in seconds. The
default value 360 is recommended.
3.
Click
The page shown in Figure 5-6 is displayed.
Figure 5-7 Setting an outgoing prefix
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4.
5 Quick Configuration (UC Mode)
Click
, and set parameters according to Table 5-5.
Table 5-5 FXO prefix parameters
Parameter
Description
Prefix
Outgoing prefix for the FXO port. The value is a number of 1 to 30 digits.
An intra-office user can dial the outgoing prefix to make an outgoing call
through the FXO port. For details, see Description. The outgoing prefix
must be the same as that set on the SIP server at the headquarters.
Property

Remove: The outgoing prefix is deleted for outgoing calls.
Assume that the outgoing prefix is 0 and the number of an outer-office
user is 12345678. To call this user, an intra-office user dials
012345678.

Retain: The outgoing prefix is not deleted for outgoing calls. This
mode is applicable to the situation where the outgoing prefix is the
same as the first digit in the outer-office number.
Assume that the outgoing prefix is 1 and the number of an outer-office
user is 12345678. To call this user, an intra-office user dials
12345678.
NOTE
The number that the PSTN carrier allocates to the FXO port is displayed to the
called party.
To reset the outgoing prefix parameters after the configuration, select the configuration items and click
to delete the original settings.
5.
Click
The page shown in Figure 5-7 is displayed.
Figure 5-8 Configuration complete
6.
Click
to finish the settings.
----End
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6 Quick Configuration (Common Mode)
Quick Configuration (Common Mode)
This topic describes how to quickly configure the EGW1520 in common mode. After the
EGW1520 is configured, it provides Internet access and basic voice services.
Table 6-1 describes the EGW1520 configuration items.
Table 6-1 Quick configuration (common mode)
Configuration Item
Country
Internet
access
Voice
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
China

Ireland

New
Zealand

Other
Description
Select the country where you are.
Internet
access
mode
ADSL or WAN.
WLAN
function
Configure the WLAN function and set a password to access the
WLAN.
SIP server
Set SIP server parameters, such as the address and port
number.
FXO
Set an outgoing prefix and determine whether to delete the
outgoing prefix for outgoing calls.
Registratio
n group
Set phone registration group parameters, such as the
registration type and mode.
Analog
phone
Set analog phone parameters, such as the internal number and
external number.
IP phone
Set IP phone parameters, such as the internal number and
external number.
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6 Quick Configuration (Common Mode)
Prerequisites
You have logged in to the web management system. For the login operations, see 7.7.1 Web
Management.
Procedure
Step 1 On the web management system, choose Quick Setup from the navigation tree.
The page shown in Figure 6-1 is displayed.
Figure 6-2 Selecting a country
Step 2 Select the country where you are, and click
The page shown in Figure 6-2 is displayed.
Figure 6-3 Configuring the network
Step 3 Configure the network.
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6 Quick Configuration (Common Mode)
After you click one of the following links, the corresponding configuration procedure is
displayed.

ADSL

WAN
If ADSL is selected, the configuration procedure is as follows:
1.
Set parameters according to Table 6-2.
Table 6-2 Network parameters
Parameter
Description
PVC Identifier
(VPI)
Virtual path identifier (VPI). The value is provided by the network
carrier.
PVC Identifier
(VCI)
Virtual channel identifier (VCI). The value is provided by the
network carrier.
PPPoE user name
User name used to access the network. The value is provided by the
network carrier.
PPPoE Password
Password used to access the network. The value is provided by the
network carrier.
WLAN
Whether to enable the WLAN function. This function is enabled by
default.
SSID
ID of the EGW1520. The ID is displayed on a Wi-Fi terminal after
the terminal finds the EGW1520.
WPA-PSK/WPA2
-PSK Key
Password used to access the WLAN. The password is encrypted
through Wi-Fi protected access II-pre-shared key (WPA2-PSK) and
WPA-PSK. The EGW1520 uses the PSK to encrypt all
communication, which prevents unauthorized listening and access.
2.
Click
The page shown in Figure 6-3 is displayed.
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Figure 6-4 Network configuration complete
3.
Click
To save the configuration and exit, click
If WAN is selected, the configuration procedure is as follows:
1.
Click WAN on the page shown in Figure 6-2. Set parameters according to Table 6-3.
Table 6-3 Network parameters
Parameter
Description
PPPoE
Indicates that Point-to-Point Protocol over Ethernet (PPPoE) is
used.
Static IP
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
PPPoE User Name: user name used to access the network.
The value is provided by the network carrier.

PPPoE Password: password used to access the network. The
value is provided by the network carrier.
Indicates that the static IP address of the EGW1520 is used. The
setting must be the same as that on the Broadband Remote
Access Server (BRAS) of the network carrier.

WAN IP Address: IP address used to access the network. The
value is provided by the network carrier.

WAN Subnet mask: subnet mask. The value is provided by
the network carrier.The default value is 255.255.255.0.

WAN gateway IP Address: IP address of the gateway. The
value is provided by the network carrier.

Primary DNS server: IP address of the primary domain name
server (DNS) server. The value is provided by the network
carrier.

Secondary DNS server: IP address of the secondary DNS
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Parameter
Description
server. The value is provided by the network carrier.
DHCP
As a DHCP client, the EGW1520 obtains the IP address from
the DHCP server. The IP address must be the same as that on the
BRAS of the network carrier.
WLAN
Indicates whether to enable the WLAN function. This function is
enabled by default.
SSID
Indicates the ID of the EGW1520. The ID is displayed on a
Wi-Fi terminal after the terminal finds the EGW1520.
WPA-PSK/WPA2-PSK
Key
Indicates the password used to access the WLAN. The password
is encrypted through Wi-Fi protected access II-pre-shared key
(WPA2-PSK) and WPA-PSK. The EGW1520 uses the PSK to
encrypt all communication, which prevents unauthorized
listening and access.
2.
Click
The page shown in Figure 6-4 is displayed.
Figure 6-5 Configuration result
3.
Click
To save the configuration and exit, click
Step 4 Configure the voice.
1.
Click
The page shown in Figure 6-5 is displayed.
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Figure 6-6 Adding an SIP server
UC Mode is set to Disable before the device is delivered. The synchronized user data is cleared when
the system changes from the UC mode to the common mode.
2.
Set parameters according to Table 6-4.
Table 6-4 SIP server parameters
Parameter
Description
Working Mode

Master: active server. The server that is added first is the active
server.

Slave: standby server.
Recovery
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.
OptionInterval
Interval for sending the option messages to the active server. The value
ranges from 10 to 900, in seconds. The default value 60 is
recommended.
NOTE
The option messages are sent to the active server only, and therefore this
parameter is valid only for the active server.
Address Type
IP address or DNS mode. The value is provided by the network carrier.
IP/Domain
IP address or DNS domain name of the SIP server. The value is
provided by the network carrier.
DNS Type
IP address parsing mode of the DNS. This parameter is valid when
Address Type is set to Domain.

SRV: A domain name can be mapped to multiple IP addresses.
The two IP addresses of the highest priority are used as the IP
addresses of the active and standby SIP servers.
NOTE
If you set DNS Type to SRV, you do not need to configure the standby SIP
server.

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HOST: One domain name corresponds to one IP address. To
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Parameter
Description
perform switchover between the active and standby servers, two
SIP servers need to be configured.
Server Type
SIP network type. The value is provided by the network carrier.
Port
Port number of the SIP server. The value is provided by the network
carrier. The default value 5060 is recommended.
Expiration Time
Timeout interval for the registration group to register with the SIP
server. The value ranges from 0 to 14400, in seconds. The default value
360 is recommended.
3.
Click
The page shown in Figure 6-6 is displayed.
Figure 6-7 Setting an outgoing prefix
4.
Click
, and set parameters according to Table 6-5.
Table 6-5 FXO parameters
Parameter
Description
Prefix
Outgoing prefix for the FXO port. The value is a number of 1 to 30 digits.
An intra-office user can dial the outgoing prefix to make an outgoing call
through the FXO port.
NOTE
 A maximum of 16 outgoing prefixes can be configured for the FXO port on the
EGW1520. An intra-office user can use any one of the outgoing prefixes to make
an outgoing call through the FXO port.

Property

The outgoing prefix cannot conflict with internal numbers and emergency
numbers. If an internal number is the same as the outgoing prefix plus an
outer-office number, the internal user is connected.
Remove: The outgoing prefix is deleted for outgoing calls.
Assume that the outgoing prefix is 0 and the number of an outer-office
user is 12345678. To call this user, an intra-office user dials
012345678.

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Retain: The outgoing prefix is not deleted for outgoing calls. This
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Parameter
6 Quick Configuration (Common Mode)
Description
mode is applicable to the situation where the outgoing prefix is the
same as the first digit in the outer-office number.
Assume that the outgoing prefix is 1 and the number of an outer-office
user is 12345678. To call this user, an intra-office user dials
12345678.
NOTE
The number that the PSTN carrier allocates to the FXO port is displayed to the
called party.
To reset the outgoing prefix parameters after the configuration, select the configuration items and click
to delete the original settings.
5.
Click
The page shown in Figure 6-7 is displayed.
Figure 6-8 Configuring a registration group
Configure a registration group when the softswitch is required for intra-office users to make outgoing
calls.
6.
Click
, and set parameters according to Table 6-6.
Table 6-6 Registration group parameters
Parameter
Description
Register Type
Registration type. The value is provided by the network carrier.
Authentication
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
Single: Only one user can exist in the registration group. The value
of Register Type is Single for the NGN network.

Group: Multiple users can exist in the registration group.

Wildcard: Wildcard registration group. This registration group
registers with the IMS or NGN based on certain wildcard rules,
which are provided by the network carrier.
Authentication mode used when a registration group registers with the
IMS or NGN. The value is provided by the network carrier.
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Parameter
Description
Password
Authentication password used when a registration group registers with
the IMS or NGN. The value is provided by the network carrier.
Sip Trunk ID
SIP trunk ID used when a registration group registers with the IMS or
NGN. The value is provided by the network carrier.
Sip Trunk Name
User name used when a registration group registers with the IMS or
NGN. The value is provided by the network carrier.
IMS Domain
IMS domain name used when a registration group registers with the
IMS. The value is provided by the network carrier.
7.
Click
The page shown in Figure 6-8 is displayed.
Figure 6-9 Configuring an analog phone
8.
Click
, and set parameters according to Table 6-7.
Table 6-7 Analog phone parameters
Parameter
Description
Port
Port number used by the analog phone to access the EGW1520.
Value 1 indicates the PHONE1 port on the EGW1520, value 2
indicates the PHONE2 port, and the rest can be deducted by
analogy.
NOTE
You are advised to use the PHONE1 port because it supports the power-off
survival function.
Internal No
The internal number is used for the calls between intra-office
subscribers. The value is a number of 1 to 30 digits, which can be
user-defined. It cannot conflict with any service prefixes, emergency
numbers, outer-office numbers, or other intra-office numbers.
Registration Group
Registration group ID that is used when a POTS phone registers
with the IMS/NGN network.
External No
External number for outgoing and incoming calls. The value is
provided by the network carrier. This parameter is valid after you set
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Parameter
6 Quick Configuration (Common Mode)
Description
the SIP Group parameter. The external number cannot conflict with
any service prefixes, emergency numbers, outer-office numbers, or
other intra-office numbers.
NOTE
The external number must correspond to Sip Trunk ID. Registration Group
bound to External No must correspond to Sip Trunk ID. If Sip Trunk ID
starts with +, change + to 00 when you configure External No.
9.
Click
The page shown in Figure 6-9 is displayed.
Figure 6-10 Configuring an IP Phone
10. Click
, and set parameters according to Table 6-8.
Table 6-8 IP phone parameters
Parameter
Description
Internal No
The internal number is used for the calls between intra-office
subscribers. The value is a number of 1 to 30 digits, which can be
user-defined. It cannot conflict with any service prefixes,
emergency numbers, outer-office numbers, or other intra-office
numbers.
Authentication
Authentication mode used when a SIP user registers with the
EGW1520. The value must be the same as that configured on the IP
phone.
Password
Authentication password used when a SIP user registers with the
EGW1520. The value must be the same as that configured on the IP
phone.
Registration Group
Registration group ID that is used when an IP phone registers with
the IMS/NGN network.
NOTE
If the required registration group does not exist, choose Voice > SIP Server,
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Parameter
6 Quick Configuration (Common Mode)
Description
and click the Registration Group tab to add it.
External No
External number for outgoing and incoming calls. The value is
provided by the network carrier. This parameter is valid after you
set the Registration Group parameter. The external number cannot
conflict with any service prefixes, emergency numbers, outer-office
numbers, or other intra-office numbers.
NOTE
The external number must correspond to Sip Trunk ID. Registration
Group bound to External No must correspond to Sip Trunk ID. If Sip
Trunk ID starts with +, change + to 00 when you configure External No.

To add IP phones in batches, click

To change the configuration of a saved IP phone, select the IP phone and reset it.
11. Click
and proceed as prompted.
The page shown in Figure 6-10 is displayed.
Figure 6-11 Configuration complete
12. Click
to finish the configuration.
----End
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eSpace EGW1520 Enterprise Gateway
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7 Feature Description and Implementation
Feature Description and Implementation
About This Chapter
This topic describes EGW1520 features and feature implementation.
7.1
Feature List
This topic describes EGW1520 features.
7.2
Connection Modes
The EGW1520 connects to the IP network using an ADSL or a WAN port. The ADSL and
WAN ports cannot be used at the same time or back each other up. If the ADSL and WAN
ports are unavailable, you can insert a 3G data card to the universal serial bus (USB) port to
access the 3G network.
7.3
Voice (UC Mode)
In the eSpace UC solution, the EGW1520 is deployed at a small branch of an enterprise to
provide network access functions for the small branch. Phones at the branch are registered
with the SIP server on the central node at the headquarters. Numbers of the branch users are
allocated by the SIP server at the headquarters and synchronized by the EGW1520 with the
data synchronization server. The EGW1520 can also function as a trunking gateway to
implement incoming and outgoing call functions through the FXO port for the local PSTN.
7.4
Voice(Common Mode)
EGW1520 can function as a SIP trunk access device or a small-scale Internet protocol-private
branch exchange (IP-PBX). It provides basic voice services and supplementary services.
7.5
Data
This topic describes EGW1520 data features and how to configure the features.
7.6
Security
This topic describes EGW1520 security features.
7.7
Operations and Maintenance
The EGW1520 can be managed on web pages or in TR-069 mode.
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7.1 Feature List
This topic describes EGW1520 features.
Access Mode
Descriptio
Specificati
on

Modes for connecting to Internet: route and bridge.

Support for the static IP address and obtaining IP addresses by
means of DHCP, PPPoE, PPPoA, and IPoA.

Point-to-Point Protocol (PPP) authentication modes: Password
Authentication Protocol (PAP) and Challenge Handshake
Authentication Protocol (CHAP).

ADSL Seamless Rate Adaptation (SRA).
Standards supported by ADSL:
ADSL

ITU-T G.992.1 Annex A

ITU-T G.992.3 (ADSL 2) Annex Annex A, L and M

ITU-T G.992.5 (ADSL 2+) Annex A

ITU-T G.992.5 (ADSL 2+) Annex M

The voice service and the data service must use the same
ADSL Permanent Virtual Circuits (PVC) channel.
Limitation

The EGW1520 connects to the IP network using an ADSL or a
WAN port. The ADSL and WAN ports cannot be used at the
same time or back each other up.
Related
Topics
7.2.1 ADSL
Descriptio
The EGW1520 uses a WAN port to connect to the upstream
network. The ADSL and WAN ports cannot be used at the same
time or back each other up.
WAN
Specificati
on
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The EGW1520 uses an Asymmetric Digital Subscriber Line
(ADSL) port to connect to the upstream network. ADSL is an
asymmetric transmission technology. It enables high-speed data
transmission over analog telephone lines by using idle high
frequencies and several modulation methods.

One 10/100/1000 Mbit/s self-adaptive WAN port.

Modes of obtaining IP addresses: static IP address
configuration, DHCP server, and PPPoE.

Standards supported by the WAN port:
−
MAC Address (IEEE 802.3)
−
Internet Protocol v4 (RFC 791)
−
Address Resolution Protocol (RFC
826)
−
Internet Control Message Protocol
(RFC 792)
−
An Ethernet Address Resolution
Protocol (RFC 0826)
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−
A Standard for the Transmission of IP
Datagrams over Ethernet Networks
(RFC894)
−
A Standard for the Transmission of IP
Datagrams over IEEE 802 Networks
(RFC1042)
−
DHCP (RFC 2131) TCP
Transmission Control Protocol
(RFC793)
−
UDP User Datagram Protocol
(RFC768)

The WAN port supports half-duplex and full-duplex self
adaptation, but cannot be forced to use full duplex or half
duplex.

The EGW1520 connects to the IP network using an ADSL or a
WAN port. The ADSL and WAN ports cannot be used at the
same time or back each other up.

IPv6 is not supported.
Related
Topics
7.2.2 WAN
Descriptio
Generally, the EGW1520 connects to the IP network using an
ADSL or a WAN port. When the ADSL or WAN port is
unavailable, the EGW1520 can use a 3G data card (based on the
USB port) to access the 3G network to transmit voice and data
(excluding the fax service).
Specificati
on
One USB port (for 3G data cards).

The EGW1520 supports the following 3G data cards:
TD SCDMA
3G

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Huawei ET302 with the software
version of 11.100.05.00.00
−
Huawei ET127 with the software
version of 11.101.01.36.00
−
Huawei K3765 with the software
version of 11.126.03.06.00
−
Huawei E176G with the software
version of 11.126.03.02.00
WCDMA
Limitation
Related
Topics
−
The 3G network supports the backup function and does not
support the fax service, Demilitarized Zone (DMZ) host, and
virtual servers.
7.2.3 3G
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Voice
UC
mode
Descripti
on
The EGW1520 is combined with the eSpace UC solution.
In UC mode, the EGW1520 can be registered with
multiple SIP servers at the same time. Phones connecting
to the EGW1520 are registered with the server on the
central node of the headquarters. All calls are processed
by the server of the headquarters.
When the EGW1520 is disconnected from both the active
and standby SIP servers, it automatically switches to the
local survival mode. It then functions as a local SIP
server to register internal users and process calls.
The EGW1520 can function as a landing gateway for the
local PSTN to process incoming and outgoing calls,
which reduces the enterprise's toll call costs.
Specifica
tion

A maximum of 20 SIP users.

One FXS port, connecting to one POTS user.

A maximum of 8-channel users (SIP users and POTS
users) can simultaneously initiate calls. Standards
supported by voice service:
Voice
access
Common
mode
−
G.711 A, G.711 u, G.729,
G.726, and G.722
−
SIP (RFC 3261–3265)
−
SIP Session Timers (RFC
4028)
−
SDP (RFC 2327)
−
RTP or RTCP
−
RFC 2833
Limitatio
None.
Related
Topics
Description
Descripti
on
As an access layer device, the EGW1520 registers with
the softswitch (NGN/IMS) through a SIP trunk and
cooperates with the softswitch to process SIP signaling
interaction. The EGW1520 can also function as a
small-scale Internet Protocol Private Branch Exchange
(IP PBX), implementing functions such as IP Phone user
registration, call control, and protocol processing.
Specifica
tion

A maximum of 20 SIP users.

One FXS port, connecting to one POTS user.

A maximum of 8-channel users (SIP users and POTS
users) can simultaneously initiate calls. Standards
supported by voice service:
Configuration
−
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G.726, and G.722
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FXO port
Dual homing
Power-off
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7 Feature Description and Implementation
−
SIP (RFC 3261–3265)
−
SIP Session Timers (RFC
4028)
−
SDP (RFC 2327)
−
RTP or RTCP
−
RFC 2833
Limitatio
For details, see Service Conflicts.
Related
Topics
7.4.1 Voice Access and IP PBX
Descripti
on
EGW1520 provides four foreign exchange office (FXO)
ports used to connect to PSTN networks. An intra-office
user dials the outgoing prefix and an outer-office user's
number to make an outgoing call through an FXO port.
An outer-office user dials the number that the PSTN
network carrier allocates to the FXO port to make an
incoming call. EGW1520 supports the switchboard, DDI,
and dedicated line functions. By default, the switchboard
function is enabled.
Specifica
tion
Four FXO ports..
Limitatio

The FXO port supports only the one-stage dialing
mode.

Each FXO port allows one user to make an outgoing
or incoming call through the FXO port at the same
time.
Related
Topics
Description.
Descripti
on
Dual homing is a disaster recovery mechanism for
emergency communication, for example, in case of a
SoftSwitch breakdown. Functioning as a voice access
device, the EGW1520 can register with two SIP servers
at the same time. When the active SIP server is faulty, the
EGW1520 switches services to the standby SIP server.
When the active SIP server is recovered, the EGW1520
switches services back to it.
Specifica
tion

Two SIP servers, working in active/standby mode.

IP addresses of two SIP servers with the highest
priority: obtained using the Domain Name System
Service (DNS SRV).
Limitatio
The priority for obtaining SIP server IP addresses using
the DNS SRV must be configured on the DNS Server.
Related
Topics
For details on how to configure the priority, see SIP
Server in Adding Voice Users.
Descripti
The EGW1520 provides a PSTN Power-off survival port
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7 Feature Description and Implementation
on
with an RJ-11 connector. When a power off occurs, the
analog phone that connects to the PHONE1 port can
make outgoing calls using the PSTN emergency line.
Specifica
tion
One PSTN Power-off survival port.
Limitatio

The Power-off survival function is available only
when a power off occurs.

Only the Analog Phone that connects to the PHONE
port supports Power-off survival function.
Related
Topics
7.4.3 Power-off Survival
Descripti
on
Voice quality technologies are used by the EGW1520 to
ensure voice transmission quality and service
effectiveness.
Specifica
tion
Voice quality technologies: voice activity detection
(VAD), comfort noise generator (CNG), echo
cancellation (EC), packet loss compensation, and jitter
buffer.

VAD
The EGW1520 detects silent periods in voice signal
streams, and removes data from the silent periods to
conserve bandwidth resources without reducing
service quality.

CNG
The CNG is used with the VAD. When the VAD
function is enabled and no packet is sent during the
silent periods, the listener may consider that the call
has been disconnected. To avoid this situation, the
EGW1520 enables the CNG function on the receiver
end. The CNG technology complies with RFC 3389.
Voice quality

EC
An echo is quickly transmitted to a listener during a
local call because the end-to-end delay is short, and
the listener may not hear the echo. However, the
end-to-end delay is long during an international call,
and the EC must be enabled. The EGW1520 EC
technology complies with ITU-T G.168.

Packet loss compensation
Packets are often lost on the connectionless IP
network as a result of network congestion, buffer
overflow, or error codes. A packet loss compensation
algorithm is used to minimize the effects of packet
loss. Lost frames can be reconstructed during
decoding based on the voice context, which ensures
the quality of the received voice.

Jitter buffer
With this function, received packets can be cached
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and then retrieved and processed to remove jitter.
Fax service
Limitatio
N/A
Related
Topics
7.4.5 Voice Parameters
Descripti
on
Fax is a form of telegraphy for the transmission of fixed
images, with or without halftones, to be reproduced at
another location in hard copy form. In ITU-RV.662,
faxing is defined as a form of telecommunication for the
reproduction at a distance of graphic documents in the
form of other graphic documents geometrically similar to
the original.
Specifica
tion
Standards supported by fax service:
Issue 01 (2012-05-15)
One FXS ports for fax machines

T.30

T.38

V.17/V.21/V.27/V.29/V.34
Limitatio
N/A
Related
Topics
7.4.4 Fax Service
Descripti
on
The digitmap is a dialing rule used by the EGW1520 to
detect and report digit events received on a termination.
The digitmap can be used to eliminate the post-dial
delay.
NOTE
The post-dial delay is the time interval between "end of dialing"
by a user and the reception (by the same user) of the call
progress signaling generated by the exchange serving this
customer. The call progressing signals can be a dial tone, a
recorded announcement, or the abandoning of the call.
DigitMap
Codec

Specifica
tion
Maximum length of the data field that can be configured
by a user: 128 bytes.
Limitatio
N/A
Related
Topics
For details, see Table 7-29 and Table 7-31.
Descripti
on
A codec is a device or computer program capable of
encoding or decoding audio signals to improve the
network usage and user capacity.
Specifica
tion

G.711 A/u, G.729, G.726, and G.722.

Multiple codecs used at the same time.

Adjustable priority for codecs.

Adjustable packetization interval for codecs.
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
DTMF
Limitatio
A codec cannot be automatically switched during a
conversation, but it can be switched through signaling
negotiation.
Descripti
on
Dual tone multi-frequency (DTMF) is the signal to the
phone company that you generate when you press an
ordinary telephone's touch keys.
Specifica
tion

DTMF detection and generation.

RFC 2833.
Limitatio
The encryption function of RFC 2833 is not supported.
Descripti
on
There is a record for each incoming or outgoing call.
Specifica
tion

A maximum of 5000 latest records.

Records of call start time, call end time, calling
number, and called number.
Limitatio
Call records can be downloaded from the web
management system but cannot be viewed directly on it.
Related
Topics
9.8 Downloading Call Records
Descripti
on
The gain can be adjusted to enhance useful signals when
signals are not strong enough on the line and affected by
other electrical noises.
Specifica
tion
Send and receive gain is adjustable from –96 dB to +32
dB.
Limitatio
N/A
Related
Topics
7.4.5 Voice Parameters
Descripti
on
To modify or supplement basic communication services,
provide supplementary services with basic
communication services.
Specifica
tion
For details about supplementary services supported by
the EGW1520, see Configuring and Using Voice
Services.
Limitatio
For details, see Service Conflicts.
Related
Topics
Enabling Voice Services
Call record
Gain adjustment
Supplementary
services
Issue 01 (2012-05-15)
A maximum of 4-channel G.711, 4-channel G.729,
2-channel G.726, or 2-channel G.722.
Configuring and Using Voice Services
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Data
Descriptio
LAN
Terminals like computers and IP phones that connect to the
EGW1520 LAN ports can set up a small local area network
(LAN) to enable the following services and functions: file
management, application sharing, printer sharing, schedule, email,
and fax.

Four 10/100 Mbit/s self-adaptive LAN ports.

Default IP address of LAN ports: 192.168.1.1; subnet mask:
255.255.255.0.

DHCP server function, allocating IP addresses to computers
and IP phones that connect to LAN ports.

Standards supported by LAN ports:
Specificati
on
MAC Address (IEEE 802.3)
−
IPv4 Internet Protocol v4 (RFC 791)
−
ARP Address Resolution Protocol
(RFC 826)
−
ICMP Internet Control Message
Protocol (RFC 792)
−
An Ethernet Address Resolution
Protocol (RFC 0826)
−
A Standard for the Transmission of IP
Datagrams over Ethernet Networks
(RFC 0894)
−
A Standard for the Transmission of IP
Datagrams over IEEE 802 Networks
(RFC 1042)
−
DHCP (RFC 2131), TCP
Transmission Control Protocol (RFC
793)
−
UDP User Datagram Protocol (RFC
768)

The LAN port supports half-duplex and full-duplex self
adaptation, but cannot be forced to use full duplex or half
duplex.

IPv6 is not supported.
Limitation
Related
Topics
7.5.1 LAN
Descriptio
DHCP is a protocol for dynamically managing and configuring
users in a centralized manner. It uses the Client/Server structure.
A DHCP client sends the DHCP server a request to apply for
parameter settings, including the IP address, subnet mask, and
default gateway. The EGW1520 can function as a DHCP server,
DHCP relay, or DHCP client.
DHCP
Specificati
on
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−

As a DHCP server, the EGW1520 can configure an IP address
pool. The default IP address ranges from 192.168.1.2 to
192.168.1.254.
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
As a DHCP relay, the EGW1520 complies with RFC 3361.

As a DHCP client, the EGW1520 supports
Option42/43/60/61/66/67/120/125/150.
Limitation
N/A
Related
Topics
7.5.2 DHCP
Descriptio
The EGW1520 allows Wi-Fi services to connect to the wireless
network. This provides small enterprises with a network solution
integrating wired and wireless technologies.

WLAN
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IEEE802.11b, IEEE802.11g, and IEEE802.11n are supported.
−
IEEE802.11b, with the maximum
transmission rate of 11 Mbit/s and
frequency of 2.4 GHz
−
IEEE802.11g, with the maximum
transmission rate of 54 Mbit/s and
frequency of 2.4 GHz (compatible
with IEEE802.11b)
−
IEEE802.11n, with the maximum
transmission rate of 300 Mbit/s and
Multi-Input Multi-Output (MIMO)
supported

A maximum of 16 WiFi terminals can be connected.

Four service set identifiers (SSIDs) are supported and SSID
broadcast and hiding are supported.
Specificati
on
−
The default value of the primary
SSID is eSpace EGW_XXXX.
−
Three subordinate SSIDs are eSpace
EGW_XXXX_S1, eSpace
EGW_XXXX_S2, and eSpace
EGW_XXXX_S3. XXXX is the last
four bits in the WLAN MAC address.

A maximum of 16 MAC addresses can be filtered.

Wi-Fi authentication standards:
−
64 bit or 128 bit Wired Equivalent
Privacy (WEP)
−
WPA-PSK, WPA2-PSK, and
Combination of WPA-PSK and
WPA2-PSK
−
Maximum transmit power:
−
802.11b/g/n (SISO): 16±2 dBm
−
802.11n (MIMO): 18±2 dBm
−
Wi-Fi Protected Setup (WPS)
Limitation
Wi-Fi bridging is not supported.
Related
Topics
7.5.3 WLAN
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Static
route
VLAN
Descriptio
The DNS specifies meaningful names for devices on a network.
The DNS server defines the mapping between domain names and
devices' IP addresses. The EGW1520 can function as a DNS
client to resolve domain names on the DNS server.
Specificati
on
N/A
Limitation
N/A
Related
Topics
7.5.4 DNS
Descriptio
The static route can improve the network performance and ensure
the bandwidth for critical networks. The static route cannot adjust
to network topology changes. When a network fault occurs or the
network topology changes, the static route may become
unreachable, resulting in connection failure. If the static route is
unreachable, the static route must be modified manually.
Specificati
on
A maximum of 32 static routes.
Limitation
N/A
Related
Topics
7.5.5 Static Route
Descriptio
The VLAN technology divides a LAN to multiple virtual LANs
(VLANs). Each VLAN is a broadcast domain. Communication
between hosts in a VLAN is the same as that in a LAN. VLANs
cannot communicate with each other directly. The EGW1520
supports port-based VLANs. LAN ports are assigned to different
VLANs, which separates users and creates virtual work groups.
Specificati
on
A maximum of four ports used to assign VLANs
Limitation
The VLAN ports support only the port-based VLANs.
Related
Topics
7.5.8 VLAN
Descriptio
The EGW1520 provides a comprehensive quality of service
(QoS) mechanism. QoS policies can be customized to ensure
precedence of core services. In addition, the EGW1520 limits
bandwidth for ordinary services (such as web upload) and saves it
for core services (such as voice streams). The EGW1520 supports
the following Diff-Serv-based QoS technologies: priority mark,
congestion management, and traffic policy.
QoS
Specificati
on
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7 Feature Description and Implementation

VLAN Tag marked with 802.1p/q priorities.

DSCP priority.

Upstream and downstream traffic limits are supported.
Limitation
3G port does not support QoS.
Related
7.5.9 QoS
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Topics
Voice
packet
priority
Layer 2
switch
Descriptio
Voice packets can be placed in the priority queue for prior
forwarding.
Specificati
on
N/A
Limitation
N/A
Related
Topics
7.5.9 QoS
Descriptio
When the EGW1520 is in Bridge mode, it has the layer 2 switch
function. Computers that are connected to the EGW1520 can use
the dialing software to access the IP network.
Specificati
on
N/A
Limitation
N/A
Related
Topics
7.2.1 ADSL
Descriptio
Network Time Protocol (NTP) is a protocol for time
synchronization. It enables a device to synchronize time with its
server or clock source (such as a quartz clock or Global
Positioning System). NTP provides accurate time correction (time
difference over a LAN smaller than 1 millisecond; time difference
over a WAN smaller than tens of milliseconds), and prevents
protocol attacks by means of encryption.
The EGW1520 is used as the NTP client to synchronize the time
with that of the NTP server.
NTP
Specificati
on
Two NTP servers, working in active/standby mode.
Limitation
The EGW1520 does not save the time. After the EGW1520
restarts, the time is restored to the factory setting and needs to be
synchronized with the NTP server.
Related
Topics
9.1 Configuring the System Time
Descriptio
Virtual Private Network (VPN) is a virtual network established
based on the existing public network. A VPN is used for an
enterprise or customer group. EGW1520, used as an access
gateway for a small-scale branch network, can connect to the
headquarters network using IPSec VPN tunnels.
Security
VPN
Specificati
on
Issue 01 (2012-05-15)

EGW1520 can connect to the headquarters using IPSec VPN
tunnels.

EGW1520 uses IPSec to set up site-to-site tunnels with the
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headquarters. As the initiator of VPN tunnels, EGW1520 uses
the peer IP address or fully qualified domain name (FQDN) as
the ID for IKE negotiation.

A maximum of 6 IPSec VPN tunnels are supported.

The throughput of the IPSec VPN tunnel is not lower than 2
Mbit/s.

A maximum of 32 concurrent connections are supported in an
IPSec VPN.
Limitation
NAT
Related
Topics
7.5.6 VPN
Descriptio
Network address translation (NAT) is the process of converting a
private IP address in an IP packet header to a public IP address.
This function enables computers with private IP addresses to
connect to a public network. NAT solves the problem of
insufficient IP addresses and prevents the attack from other
networks, hiding and protecting computers on the private
network.
Specificati
on
A maximum of 1024 NAT table entries.
Limitation
N/A
7.6.1 NAT
Related
Topics
7.2.1 ADSL
7.2.2 WAN
SIP
ALG
Incomin
g packet
filter
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Descriptio
NAT enables one or more private hosts to use a public IP address
to connect to a public network.NAT works in the transport layer,
which is transparent to the application layer, so it is difficult for
the SIP application to traverse the NAT device. The EGW1520
supports the SIP application level gateway (ALG), which solves
the NAT traversal problem for SIP.
Specificati
on
N/A
Limitation
N/A
Related
Topics
7.6.1 NAT
Descriptio
If the firewall on the LAN or WAN side is enabled, all the packets
transmitted through LAN or WAN ports to the EGW1520 will be
blocked. You can configure the incoming packet filtering function
to allow specified packets to be transmitted to the EGW1520.
Specificati
on
N/A
Limitation
N/A
Related
Topics
7.6.2 Incoming Packet Filter
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Outgoin
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filter
MAC
address
filter
URL
filter
Virtual
server
DMZ
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7 Feature Description and Implementation
Descriptio
The system allows all packets to be sent to the upstream network
through the LAN ports. You can configure the outgoing packet
filter to prevent certain packets from being sent to the upstream
network using the LAN ports.
Specificati
on
N/A
Limitation
N/A
Related
Topics
7.6.3 Outgoing Packet Filter
Descriptio
If the ADSL service is in Bridge mode, you can configure MAC
address filter to prevent the ADSL port from forwarding certain
data frames.
Specificati
on
N/A
Limitation
N/A
Related
Topics
7.6.4 MAC Address Filter
Descriptio
The EGW1520 uses the URL filter to limit users' access to
specified websites.
Specificati
on

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.
Related
Topics
7.6.5 URL Filter
Descriptio
A virtual server enables external users to access internal servers
on the private network. You can configure a public server on the
private network to provide web access and FTP download
services.
Specificati
on
N/A
Limitation
This function cannot be enabled when the EGW1520 connects to
the 3G network.
Related
Topics
7.6.6 Virtual Server
Descriptio
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, which
makes the configuration complicated. To simplify the
configuration, configure only the IP addresses for internal servers
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in the DMZ. Because all ports are open in the DMZ, it increases
the security risk for internal servers.
Specificati
on
Only one internal server in the DMZ is supported.
Limitation
This function cannot be enabled when the EGW1520 connects to
the 3G network.
Related
Topics
7.6.7 DMZ
Descriptio
The EGW1520 can encrypt sensitive information in configuration
files, such as user name and password.
The EGW1520 can encrypt user names and passwords for:
Configu
ration
file
encrypti
on
HTTPS
Specificati
on

Logging in to the web management system

PPPoE

PPPoA

WLAN

Accessing the 3G network

TR-069 ACS

SIP user

NTP Server
Limitation
Manual modification on the configuration file is not supported.
Related
Topics
9.2 Managing the Configuration File
Descriptio
The web browser interacts with the EGW1520 using HTTPS,
which ensures user information security.
Specificati
on
N/A
Limitation
N/A
Related
Topics
7.7.1 Web Management
Operations and Maintenance
Web
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Descriptio
The EGW1520 provides web management system for users to
easily configure, diagnose, and upgrade the EGW1520.
Specificati
on

HTTPS

HTTP
Limitation

Operating system: Windows XP or later

Browser: Microsoft Internet Explorer 6.0 or later

Resolution: 1024 x 768 or higher
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TR-069
7 Feature Description and Implementation
Related
Topics
7.7.1 Web Management
Descriptio
Technical Report 069 (TR-069) is a technical specification
developed by the DSL Forum. TR-069 is short for CPE WAN
Management Protocol (CWMP). As an application-layer protocol
for remotely managing end devices, TR-069 enables the
Application Control Server (ACS) to remotely manage and
maintain the EGW1520.
Specificati
on

TR-069

TR-098

TR-104
Web parameters reference
Limitation
N/A
Related
Topics
7.7.2 TR-069
TR-069 parameters reference
7.2 Connection Modes
The EGW1520 connects to the IP network using an ADSL or a WAN port. The ADSL and
WAN ports cannot be used at the same time or back each other up. If the ADSL and WAN
ports are unavailable, you can insert a 3G data card to the universal serial bus (USB) port to
access the 3G network.
7.2.1 ADSL
The EGW1520 uses an ADSL port to connect to the upstream network. The ADSL uses high
frequencies that are not used by voice phone calls and several modulation methods to achieve
high-speed data transmission over twisted-pair copper phone lines.
Description
This topic describes the principle, implementation, specification, and limitation for the
EGW1520 to connect to the upstream network by using the ADSL.
Principle
Using the frequency-division multiplexing (FDM) technology, the ADSL divides a regular
telephone line into three separate channels for the telephone, upstream link, and downstream
link. Using the discrete multi-tone (DMT) technology, the ADSL divides the frequency band
from 0 kHz to 1.1 MHz on the telephone line into 256 sub frequency bands, each of which
occupies a 4.3 kHz bandwidth.

4 kHz or lower: Provides traditional telephone services.

20 kHz to 138 kHz: Transmits upstream signals.

138 kHz to 1.1 MHz: Transmits downstream signals.
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Telephone signals are transmitted at the frequency band from 0 kHz to 4 kHz, while signals of
ADSL services are transmitted at other frequency bands.
ADSL in practical application are deployed as follows:

On the service provider side, connect the telephone lines that have enabled the ADSL
service to a digital subscriber line access multiplexer (DSLAM).

On the user side, use an ADSL modem to connect telephone and data lines.
The ADSL uses high frequency signals. To prevent noise disturbance to calls, splitters are
required on the service provider side and the user side to separate data signals from audio
signals.
ADSL2
The ADSL2 improves the initialization state machine's performance by reducing the frame
overhead. In addition, the ADSL2 uses higher modulation rate, improved coding gain, and
enhanced signal processing methods. Compared with the ADSL, the ADSL2 takes advantage
in rate and coverage. Its maximum downstream rate is 12 Mbit/s and maximum upstream rate
is 1 Mbit/s.
ADSL2+
In addition to basic ADSL2 features, the ADSL2+ extends ADSL2's downstream frequency
band, which increases the downstream rate within a short distance. Two ADSL2 standards
specify downstream frequency bands to 0 kHz–1.1 MHz and 0 kHz–552 kHz, while the
ADSL2+ specifies the downstream frequency band to 0 kHz t–2.2 MHz. This increases the
ADSL2+ downstream rate to 24 Mbit/s within 1.5 km. The ADSL2's upstream rate, depends
on the line condition (basically, it is 1 Mbit/s).
Implementation
The EGW1520 functions as a modem on the ADSL network to modulate and demodulate
ADSL signals. After being connected to a remote DSLAM, the EGW1520 connects users to
the IP network. Figure 7-1 shows the ADSL network.
Figure 7-1 ADSL network diagram
Specification

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Modes for connecting to Internet: route and bridge.
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
Support for the static IP address and obtaining IP addresses by means of DHCP, PPPoE,
PPPoA, and IPoA.

Point-to-Point Protocol (PPP) authentication modes: Password Authentication Protocol
(PAP) and Challenge Handshake Authentication Protocol (CHAP).

ADSL Seamless Rate Adaptation (SRA).
Standards supported by ADSL:

ITU-T G.992.1 Annex A

ITU-T G.992.3 (ADSL 2) Annex Annex A, L and M

ITU-T G.992.5 (ADSL 2+) Annex A

ITU-T G.992.5 (ADSL 2+) Annex M

The voice service and the data service must use the same ADSL Permanent Virtual
Circuits (PVC) channel.

The EGW1520 connects to the IP network using an ADSL or a WAN port. The ADSL
and WAN ports cannot be used at the same time or back each other up.
Limitation
Basic Configuration
This topic describes the basic configuration of the ADSL. After the ADSL is configured and
ADSL connection is set up, EGW1520 users can connect to the IP network to access the
Internet or IP Multimedia Subsystem/Next Generation Network (IMS/NGN).
Prerequisite
You have logged in to the web management system. For details, see 7.7.1 Web Management.
Background
For the principle, implementation, specification, and limitation of the ADSL, see Description.
EGW1520 ADSL basic configuration contains the following operations:
1.
Add an ATM interface. For details, see Adding an ATM Interface.
2.
Add an ADSL service for the new ATM interface. For details, see Adding an ADSL
Service.

ADSL services can be added only for ATM interfaces. Therefore, you must add an ATM interface
before adding an ADSL service.

Before deleting an ATM interface, you must delete the ADSL service that is associated with the
interface.
Adding an ATM Interface
Step 1 On the web management system, choose Network > ADSL from the navigation tree.
The page shown in Figure 7-2 is displayed.
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Figure 7-2 Adding an ATM interface (1)
Step 2 Click
The page shown in Figure 7-3 is displayed.
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Figure 7-3 Adding an ATM interface (2)
Step 3 Set parameters according to Table 7-1.
Table 7-1 Parameter description (1)
Parameter
Description
PVC Identifier
(VPI)
Indicates the virtual path identifier. The value is provided by the
network carrier.
PVC Identifier
(VCI)
Indicates the virtual channel identifier. The value is provided by the
network carrier.
DSL Latency
Indicates the ADSL latency channel. Normally, the value is Path0.
The setting must be the same as that on the Digital Subscriber Line
Access Multiplexer (DSLAM), which is provided by the network
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Parameter
7 Feature Description and Implementation
Description
carrier.
DSL Link Type
Indicates the ADSL connection type. The options are as follows:

EoA: Ethernet over ATM, including Point-to-Point Protocol over
Ethernet over ATM (PPPoEoA), IP over Ethernet over ATM
(IPoEoA), and bridge.

PPPoA: Point-to-Point Protocol over ATM

IPoA: Internet Protocol over ATM
The setting on the EGW1520 must be the same as that on the
DSLAM, which is provided by the network carrier. The following
Adding an ADSL Service uses EoA as an example.
Connection Mode
Indicates the ADSL connection mode. The options are as follows:

Default Mode: Packets that are sent from the ADSL port do not
carry any VLAN tags.

VLAN MUX Mode: Packets that are sent from the ADSL port can
carry VLAN tags.
The setting on the EGW1520 must be the same as that on the
DSLAM, which is provided by the network carrier.
NOTE
When DSL Link Type is set to PPPoA or IPoA, this parameter is unavailable.
Encapsulation
Mode
Indicates the mode for encapsulating packets. The setting on the
EGW1520 must be the same as that on the DSLAM, which is
provided by the network carrier.
Service Category
Indicates the service type. This parameter limits the rate of upstream
packets that are sent from the ADSL port.
IP QoS Scheduler
Algorithm

UBR Without PCR: Neither the unspecified bit rate (UBR) nor the
peak cell rate (PCR) is limited.

UBR With PCR: The UBR is not limited but the PCR is limited.

CBR: The constant bit rate (CBR) is used.

Non Realtime VBR: The non-real-time variable bit rate (VBR) is
used.

Non Realtime VBR: The real-time VBR is used.
Indicates the QoS rule for scheduling upstream packets that are sent
from the ADSL port. The options are as follows:

Strict Priority: The priority-based QoS rule is used. Packets in a
queue with a low priority are not sent until packets in the queue
with a higher priority have been sent. The priority of the default
queue is 8. Packets matching no QoS rule are placed in the default
queue.

Weighted Fair Queuing: The Weighted Fair Queuing (WFQ)-based
QoS rule is used. Packets are classified based on precedence. The
precedence of a packet determines the bandwidth for sending the
packet out of the queue. A higher precedence indicates a higher
bandwidth.
NOTE
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Description
For features and configurations of the EGW1520 QoS, see QoS.
Step 4 Click
to save the settings.
----End
Adding an ADSL Service
The operations for Adding an ADSL Service vary with the ADSL connection type. This topic
describes the ADSL connection of the EoA type. For parameters for configuration other
ADSL connection types, see Web Parameters Reference .
Step 1 On the web management system, choose Network > ADSL from the navigation tree.
The page shown in Figure 7-4 is displayed.
Figure 7-4 Adding an ADSL service (1)
Step 2 Click
The page shown in Figure 7-5 is displayed.
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Figure 7-5 Adding an ADSL service (2)
Step 3 Select an ADSL port.
Step 4 Click
The page shown in Figure 7-6 is displayed.
Figure 7-6 Adding an ADSL service (3)
Step 5 Select a service type and define the service description. You can also retain the default service
description.

The service type varies according to network carriers.

If Bridging is selected, EGW1520 functions as a bridge and does not provide the route
and voice functions.
The EGW1520 supports the following ADSL service types (to access the configuration
procedure of a service type, click the corresponding link):
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
PPPoE

IPoE

Bridging
7 Feature Description and Implementation
If you select PPPoE as the service type, the procedure is as follows:
1.
Click
in Figure 7-6.
The page shown in Figure 7-7 is displayed.
Figure 7-7 Adding an ADSL service (4)
2.
Set parameters according to Table 7-2.
Table 7-2 Parameter description (2)
Parameter
Description
Username
The value is provided by the network carrier.
Password
The value is provided by the network carrier.
Authentication Method
The options are as follows:

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AUTO: The system automatically selects the Password
Authentication Protocol (PAP) or Challenge Handshake
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Parameter
Description
Authentication Protocol (CHAP) as required.

PAP: The PAP is used.

CHAP: The CHAP is used.
The value is provided by the network carrier. The
recommended value is AUTO.
Dial on demand (with idle
timeout timer)
Dial on demand is applicable to the Internet service charged
by time. When this function is enabled, the EGW1520 sets
up a dialing connection only when there are Internet access
requests. If the EGW1520 does not receive any Internet
access requests within a specified period, the ADSL
connection is disconnected automatically.
Use Static IP Address
The static IP address assigned by the network carrier is
used.
Bridge PPPoE Frames
Between WAN and Local
Ports
PCs and other terminals that connect to the EGW1520 can
still use the PPPoE dialing function when the EGW1520
functions as a route.
NAT
Indicates whether to enable the network address translation
(NAT) function which allows EGW1520 users to access the
Internet with private IP addresses. The default value Enable
is recommended.
Fullcone NAT
Indicates whether to enable the full cone NAT function. The
default value Disable is recommended.
Firewall
Indicates whether to enable the firewall function. If the
firewall function is enabled, the firewall will block all
downstream packets that are sent from the ADSL port. The
default value Enable is recommended.
3.
Click
The page shown in Figure 7-8 is displayed.
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Figure 7-8 Adding an ADSL service (5)
4.
Configure a DNS server.
The system provides the following methods for configuring a DNS server:
−
Select a port that connected to a DNS server.
−
Configure a static DNS server whose IP address is provided by the network carrier.
If the IP address of the DNS is provided, users can select the second method.
5.
Click
The page shown in Figure 7-9 is displayed.
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Figure 7-9 Adding an ADSL service (6)
6.
Check whether the configurations are correct. If yes, click
configurations. If no, click
to save the
to modify the configurations.
If you select IPoE as the service type, the procedure is as follows:
1.
Click IPoE in Figure 7-6.
The page shown in Figure 7-10 is displayed.
Figure 7-10 Adding an ADSL service (7)
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2.
Click
7 Feature Description and Implementation
The page shown in Figure 7-11 is displayed.
Figure 7-11 Adding an ADSL service (8)
3.
Set the IP address.
Select either of the following modes for setting the IP address based on the parameters
provided by carriers:
−
DHCP mode
−
Static mode
Set parameters according to Table 7-3.
Table 7-3 Parameter description (3)
Parameter
Description
DHCP
The EGW1520 functions as the DHCP client and obtains the
IP address using the DHCP server. The setting must be the
same as that on the Broadband Remote Access Server
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7 Feature Description and Implementation
Description
(BRAS) of the network carrier.
Option 60 Vendor ID
Indicates the ID of the DHCP client manufacturer.
Option 61 IAID
Indicates the identity association identifier of the DHCP
client. The IAID and DUID compose of the client ID. The
MAC address and DHCP client ID are used to identify a
DHCP client. When the same client requests IP addresses at
different times, the DHCP server allocates the same IP
address to it.
Option 61 DUID
Indicates the unique DHCP client identifier. The IAID and
DUID compose of the client ID. The MAC address and
DHCP client ID are used to identify a DHCP client. When
the same client requests IP addresses at different times, the
DHCP server allocates the same IP address to it.
Option 125
Indicates the option for the client manufacturer. It is used to
provide the DHCP server with information such as the
manufacturer name, OUI, device model, device SN for the
DHCP server. The information can be used in TR-069.By
default, this value is enabled.
Option 42
Indicates the NTP server option. It is used to allocate the
NTP server's IP addresses to the client.By default, this value
is enabled.
Option 43
Indicates the option for the manufacturer's specified
information. It is used to allocate ACS URL to the client.
The information can be used in TR-069.By default, this
value is enabled.
Option 66 & 67 & 150

66: TFTP server domain option, used to allocate the
TFTP server's domain name to the client.

67: File name option, used to allocate the file name to the
client.

150: TFTP server IP address option, used to allocate the
TFTP server's IP address to the client.
By default, this value is enabled.
Option 120
Indicates the SIP server option. It is used to allocate the SIP
server's IP address or domain name to the client.By default,
this value is enabled.
Static IP Address
Set the static IP address for the EGW1520. The setting must
be the same as that on the BRAS of the network carrier.
WAN IP Address
Indicates the IP address. The value is provided by the
network carrier.
WAN Subnet Mask
Indicates the subnet mask. The value is provided by the
network carrier.The default value is 255.255.255.0.
WAN Gateway
Indicates the gateway IP address. The value is provided by
the network carrier.
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4.
Click
7 Feature Description and Implementation
The page shown in Figure 7-12 is displayed.
Figure 7-12 Adding an ADSL service (9)
5.
Set parameters according to Table 7-4.
Table 7-4 Parameter description (4)
Parameter
Description
NAT
Indicates whether to enable the network address translation
(NAT) function which allows EGW1520 users to access the
Internet with private IP addresses. The default value Enable
is recommended.
Fullcone NAT
Indicates whether to enable the full cone NAT function. The
default value Disable is recommended.
Firewall
Indicates whether to enable the firewall function. If the
firewall function is enabled, the firewall will block all
downstream packets that are sent from the ADSL port. The
default value Enable is recommended.
6.
click
The page shown in Figure 7-13 is displayed.
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Figure 7-13 Adding an ADSL service (10)
7.
Configure a DNS server.
The system provides the following methods for configuring a DNS server:
−
Select a port that connected to a DNS server.
−
Configure a static DNS server whose IP address is provided by the network carrier.
If the IP address of the DNS is provided, users can select the second method.
8.
Click
The page shown in Figure 7-14 is displayed.
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Figure 7-14 Adding an ADSL service (11)
9.
Check whether the configurations are correct. If yes, click
configurations. If no, click
to save the
to modify the configurations.
If you select Bridging as the service type, the procedure is as follows:
1.
Click Bridging in Figure 7-6.
The page shown in Figure 7-15 is displayed.
Figure 7-15 Adding an ADSL service (12)
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2.
Click
7 Feature Description and Implementation
The page shown in Figure 7-16 is displayed.
Figure 7-16 Adding an ADSL service (13)
3.
Check whether the configurations are correct. If yes, click
configurations. If no, click
to save the
to modify the configurations.
----End
Verification
To verify that the ADSL connection is set up, proceed as follows:
Step 1 Choose Management > Status. The Network page is displayed.
Step 2 Check the value of Status.
If the value of Status is Connected, the ADSL connection is set up. If the value is not
Connected, verify that the configuration is correct.
----End
Advanced Configurations
This topic describes how to set advanced ADSL parameters. Only network administrators can
change the advanced parameter settings. To ensure the normal running of the EGW1520, you
are advised to use the default settings.
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Prerequisites
You have logged in to the web management system. For details, see 7.7.1 Web Management.
Configuration Procedure
Step 1 On the web management system, choose Network > ADSL from the navigation tree.
Step 2 Click the Advanced Configuration tab.
The page shown in Figure 7-17 is displayed.
Figure 7-17 ADSL advanced configurations
Step 3 Set parameters according to Table 7-5.
Table 7-5 Parameter description
Parameter
Description
Modulation
Indicates the ADSL modulation mode, which is provided by the network
carrier and must be compatible with the Digital Subscriber Line Access
Multiplexer (DSLAM). The options are as follows:
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
G.Dmt: It is an International Telecommunications Union (ITU)
standard for ADSL, also known as G.992.1. It delivers data at rates up
to 8 Mbit/s downstream and 896 kbit/s upstream. By default, this
value is selected.

T1.413: It is created by the American National Standards Institute
(ANSI) Telecommunications Committee. It defines the minimum
requirements for satisfactory performance of ADSL systems using the
Discrete Multi-Tone (DMT) line code. The maximum downstream
data rate is 8 Mbit/s. By default, this value is selected.

ADSL2: It is the second-generation ADSL standard, including
ADSL2 (G.992.3) and no-splitter ADSL2 (G.992.4). Compared with
the first-generation ADSL standard, the ADSL2 standard is better in
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Description
the access distance and transmission performance aspects, and is
improved in stability and anti-noise capabilities. It delivers data at
rates up to 12 Mbit/s downstream and 1.0 Mbit/s upstream. By
default, this value is selected.
Phone Line
Pair
Capability
Step 4 Click

ADSL2+: The ADSL2+ extends the capability of the ADSL2. It
increases the number of subcarriers by increasing the number of
downstream bits. It delivers data at rates up to 24 Mbit/s downstream
and 1.0 Mbit/s upstream. The maximum transmission distance is 6.5
km. By default, this value is selected.

AnnexL: It is an ITU standard for ADSL, also known as G.992.3. It
delivers data at rates up to 12 Mbit/s downstream and 1.0 Mbit/s
upstream. By default, this value is selected.

Annex M: It contains all new features of ADSL2+. Annex M delivers
data at rates up to 24 Mbit/s downstream and 3.5 Mbit/s upstream. By
default, this value is not selected.
Indicates the phone line pair. The default value is Inner pair.

Inner pair: inner pair among the four internal phone lines.

Outer pair: outer pair among the four internal phone lines.
Indicates the DSL service capability.

Bitswap: bit exchange capability. If this value is specified, EGW1520
allows simple bit control for automatically adjusting line rates. By
default, this value is selected.

SRA: seamless rate adaptation capability. If this value is specified,
EGW1520 can change connection rates when services are transmitted
continuously or when there is no bit error. By default, this value is not
selected.
to save the settings.
----End
7.2.2 WAN
The EGW1520 uses a WAN port to connect to the upstream network. The FE mode, however,
cannot be used with the ADSL mode at the same time and cannot function as a backup of the
ADSL mode.
Description
This topic describes the principle, implementation, specification, and limitation for using a
WAN port to connect the EGW1520 to the upstream network.
Principle
The EGW1520 complies with IEEE802.3u 100Base-T.
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Implementation
The EGW1520 has a WAN port. After being configured and connected, the WAN port
connects users to the IP network. The IP network connects users to the Internet, IP Multimedia
Subsystem (IMS), or Next Generation Network (NGN), as shown in Figure 7-18.
Figure 7-18 WAN network diagram
Specification

One 10/100/1000 Mbit/s self-adaptive WAN port.

Modes of obtaining IP addresses: static IP address configuration, DHCP server, and
PPPoE.

Standards supported by the WAN port:
−
MAC Address (IEEE 802.3)
−
Internet Protocol v4 (RFC 791)
−
Address Resolution Protocol (RFC 826)
−
Internet Control Message Protocol (RFC 792)
−
An Ethernet Address Resolution Protocol (RFC 0826)
−
A Standard for the Transmission of IP Datagrams over Ethernet Networks (RFC894)
−
A Standard for the Transmission of IP Datagrams over IEEE 802 Networks
(RFC1042)
−
DHCP (RFC 2131) TCP Transmission Control Protocol (RFC793)
−
UDP User Datagram Protocol (RFC768)
Limitation

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The WAN port supports half-duplex and full-duplex self adaptation, but cannot be forced
to use full duplex or half duplex.
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
The EGW1520 connects to the IP network using an ADSL or a WAN port. The ADSL
and WAN ports cannot be used at the same time or back each other up.

IPv6 is not supported.
Configuration
The EGW1520 uses a WAN port to connect to the IP network. Users can access the Internet,
IP Multimedia Subsystem (IMS), or Next Generation Network (NGN) over the IP network.
Prerequisite
You have logged in to the web management system. For details, see 7.7.1 Web Management.
Background
For the principle, implementation, specification, and limitation for using a WAN port to
connect the EGW1520 to the upstream network, see Description.
Procedure
Step 1 On the web management system, choose Network > WAN from the navigation tree.
The page shown in Figure 7-19 is displayed.
Figure 7-19 Configuring the WAN connection (1)
Step 2 Click
The page shown in Figure 7-20 is displayed.
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Figure 7-20 Configuring the WAN connection (2)
Step 3 Select a service type and define the service description. You can also use the default service
description.
The service type varies according to network carriers.
The EGW1520 supports the following WAN service types (to access the configuration
procedure of a service type, click the corresponding link):

PPPoE

IPoE
If you select PPPoE as the service type, the procedure is as follows:
1.
Click
in Figure 7-20.
The page shown in Figure 7-21 is displayed.
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Figure 7-21 Configuring the WAN connection (3)
2.
Set parameters according to Table 7-6.
Table 7-6 Parameter description (1)
Parameter
Description
Username
The value is provided by the network carrier.
Password
The value is provided by the network carrier.
Authentication Method
The options are as follows:

AUTO: The system automatically selects the Password
Authentication Protocol (PAP) or Challenge Handshake
Authentication Protocol (CHAP) as required.

PAP: The PAP is used.

CHAP: The CHAP is used.
The value is provided by the network carrier. The recommended
value is AUTO.
Dial on demand
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Dial on demand is applicable to the Internet service charged by
time. When this function is enabled, the EGW1520 sets up a
dialing connection only when there are Internet access requests.
If the EGW1520 does not receive any Internet access requests
within a specified period, the WAN connection is disconnected
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Parameter
Description
automatically.
Use Static IP Address
The static IP address assigned by the network carrier is used.
Bridge PPPoE Frames
Between WAN and
Local Ports
The default value is recommended.
NAT
Indicates whether to enable the network address translation
(NAT) function which allows EGW1520 users to access the
Internet with private IP addresses.
Fullcone NAT
Indicates whether to enable the full cone NAT function. The
default value Disable is recommended.
Firewall
Indicates whether to enable the firewall function. If the firewall
function is enabled, the firewall will block all downstream
packets that are sent from the WAN port. By default, this value
is Enabled. You can configure relevant parameters to enable
packets to pass the firewall.
3.
Click
The page shown in Figure 7-22 is displayed.
Figure 7-22 Configuring the WAN connection (4)
4.
Configure a DNS server.
The system provides the following configuration methods:
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−
Select a WAN port. Then the DNS server where the port resides is used.
−
Set the static IP address for the DNS server. The IP address is provided by the
network carrier.
This method is available when you know the IP address of the DNS server.
5.
Click
The page shown in Figure 7-23 is displayed.
Figure 7-23 Configuring the WAN connection (5)
6.
Check whether the configurations are correct. If yes, click
configurations. If no, click
to save the
to modify the configurations.
If you select IPoE as the service type, the procedure is as follows:
1.
Click IPoE in Figure 7-20.
The page shown in Figure 7-24 is displayed.
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Figure 7-24 Configuring the WAN connection (6)
2.
Click
The page shown in Figure 7-25 is displayed.
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Figure 7-25 Configuring the WAN connection (7)
3.
Set parameters according to Table 7-7.
Table 7-7 Parameter description (2)
Parameter
Description
DHCP
The EGW1520 functions as the DHCP client and obtains the
IP address using the DHCP server. The setting must be the
same as that on the Broadband Remote Access Server
(BRAS) of the network carrier.
Option 60 Vendor ID
Indicates the ID of the DHCP client manufacturer.
Option 61 IAID
Indicates the identity association identifier of the DHCP
client. The IAID and DUID compose of the client ID. The
MAC address and DHCP client ID are used to identify a
DHCP client. When the same client requests IP addresses at
different times, the DHCP server allocates the same IP
address to it.
Option 61 DUID
Indicates the unique DHCP client identifier. The IAID and
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Parameter
Description
DUID compose of the client ID. The MAC address and
DHCP client ID are used to identify a DHCP client. When
the same client requests IP addresses at different times, the
DHCP server allocates the same IP address to it.
Option 125
Indicates the option for the client manufacturer. It is used to
provide the DHCP server with information such as the
manufacturer name, OUI, device model, device SN for the
DHCP server. The information can be used in TR-069.By
default, this value is enabled.
Option 42
Indicates the NTP server option. It is used to allocate the
NTP server's IP addresses to the client.By default, this value
is enabled.
Option 43
Indicates the option for the manufacturer's specified
information. It is used to allocate ACS URL to the client.
The information can be used in TR-069.By default, this
value is enabled.
Option 66 & 67 & 150

66: TFTP server domain option, used to allocate the
TFTP server's domain name to the client.

67: File name option, used to allocate the file name to the
client.

150: TFTP server IP address option, used to allocate the
TFTP server's IP address to the client.
By default, this value is enabled.
Option 120
Indicates the SIP server option. It is used to allocate the SIP
server's IP address or domain name to the client.By default,
this value is enabled.
Static IP Address
Set the static IP address for the EGW1520. The setting must
be the same as that on the BRAS of the network carrier.
WAN IP Address
Indicates the IP address. The value is provided by the
network carrier.
WAN Subnet Mask
Indicates the subnet mask. The value is provided by the
network carrier.The default value is 255.255.255.0.
WAN Gateway
Indicates the gateway IP address. The value is provided by
the network carrier.
4.
Click
The page shown in Figure 7-26 is displayed.
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Figure 7-26 Configuring the WAN connection (8)
5.
Set parameters according to Table 7-8.
Table 7-8 Parameter description (3)
Parameter
Description
NAT
Indicates whether to enable the network address translation
(NAT) function which allows EGW1520 users to access the
Internet with private IP addresses. The default value Enable
is recommended.
Fullcone NAT
Indicates whether to enable the full cone NAT function. The
default value Disable is recommended.
Firewall
Indicates whether to enable the firewall function. If the
firewall function is enabled, the firewall will block all
downstream packets that are sent from the WAN port. By
default, this value is Enabled. You can configure relevant
parameters to enable packets to pass the firewall.
6.
Click
The page shown in Figure 7-27 is displayed.
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Figure 7-27 Configuring the WAN connection (9)
7.
Configure a DNS server.
The system provides the following configuration methods:
−
Select a WAN port. Then the DNS server where the port resides is used.
−
Set the static IP address for the DNS server. The IP address is provided by the
network carrier.
This method is available when you know the IP address of the DNS server.
8.
Click
The page shown in Figure 7-28 is displayed.
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Figure 7-28 Configuring the WAN connection (10)
9.
Check whether the configurations are correct. If yes, click
configurations. If no, click
to save the
to modify the configurations.
----End
Verification
To verify that the WAN connection is set up, proceed as follows:
Step 1 Choose Management > Status. The Network page is displayed.
Step 2 Check the value of Status.
If the value of Status is Connected, the WAN connection is set up. If the value is not
Connected, verify that the configuration is correct.
----End
7.2.3 3G
Normally, the EGW1520 uses an ADSL or a WAN port to connect to the IP network. When
the ADSL or WAN port cannot be used, insert a 3G card to the USB port to connect the
EGW1520 to the 3G network. The 3G network connects the EGW1520 to the IP network. The
3G network supports voice and data services, but does not support the fax service.
Description
This topic describes the principle, implementation, specification, and limitation for connecting
the EGW1520 to the upstream network through the 3G network.
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Principle
The EGW1520 has a USB port. After you insert a 3G card to the USB port, the EGW1520 is
connected to the 3G network.
Implementation
Normally, the EGW1520 uses an ADSL or a WAN port to connect to the IP network. When
the ADSL or WAN port is not available, you can use a 3G card to enable audio and data
services (fax service not supported), as shown in Figure 7-29.
When the ADSL or WAN port is available, the EGW1520 automatically switches to the ADSL
or WAN port to connect to the IP network.
Figure 7-29 3G network
Specification
One USB port (for 3G data cards).
Limitation

The EGW1520 supports the following 3G data cards:
TD SCDMA
−
Huawei ET302 with the software version of 11.100.05.00.00
−
Huawei ET127 with the software version of 11.101.01.36.00
WCDMA

−
Huawei K3765 with the software version of 11.126.03.06.00
−
Huawei E176G with the software version of 11.126.03.02.00
The 3G network supports the backup function and does not support the fax service,
Demilitarized Zone (DMZ) host, and virtual servers.
Configuration
This topic describes how to configure the connection to the IP network through 3G.
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Prerequisite
Huawei K3765 3G data card has been inserted.
After WAN cable or ADSL cable is connected, 3G data card can be connected to the
EGW1520 to achieve network backup. The procedure for enabling the 3G network connection
is as follows:
1.
Draw the 3G data card cap, and insert the SIM card, as shown in Figure 7-30.
Figure 7-30 Inserting the SIM card
2.
Insert the 3G data card into the USB port on the EGW1520, as shown in Figure 7-31.
Figure 7-31 Inserting the 3G data card
Logging In to the Web Management System
You have logged in to the web management system. For details, see Logging In to the Web
Management System.
Background
For details about the principle, implementation, specification, and limitation for connecting
the EGW1520 to the upstream network through the 3G network, see Description.
Procedure
Step 1 On the web management system, choose Network > 3G from the navigation tree.
The page shown in Figure 7-32 is displayed.
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Figure 7-32 3G Configuration (1)
Table 7-9 describes the parameters.
Table 7-9 Parameter description (1)
Parameter
Description
ISP
Indicates the carrier name, such as China Unicom.
Signal Intensity
Indicates the signal strength.
SIM Card Status
Indicates the SIM card status. The options are as follows:

Ready: The SIM card is available.

No Device: No data card exists or the data card is not detected
properly.

PUK Need: If you enter incorrect PIN codes for three
consecutive times, the SIM card is locked. To unlock the SIM
card, contact network carriers.

Unlocking: The PIN code is entered and the SIM card is being
unlocked.
IMEI
Indicates the serial number of the data card.
SYS Mode
Indicates the connection mode, such as WCDMA.
Connection Status
Indicates the current network connection status.
IP Address
Indicates the IP address obtained on the 3G network.
Connection Duration
Indicates the network connection duration.
Step 2 Click the
The page shown in Figure 7-33 is displayed.
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Figure 7-33 3G Configuration (2)
Step 3 Set parameters according to Table 7-10.
Table 7-10 Parameter description (2)
Parameter
Description
Backup Mode
Backup modes are as follows:

Manual: When the ADSL or WAN port is disconnected, you are
required to connect the EGW1520 to the 3G network manually.

Automatic: When the ADSL or WAN port is disconnected, the
EGW1520 connects to the 3G network automatically.
NOTE
When the ADSL or WAN port is available, the EGW1520 automatically
switches to the ADSL or WAN port to connect to the IP network.
WCDMA
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Set WCDMA parameters.

Dial String: Enter the dial string, such as *99# for China
Unicom.

Access Point Name: Enter the access point name, such as 3gnet
for China Unicom.
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Parameter
Description
TD SCDMA
Set TD SCDMA parameters.
Step 4 Click

Dial String: Enter the dial string, such as *99# for China Mobile.

Access Point Name: Enter the access point name, such as cmnet
for China Mobile.
Step 5 Click the SIM Configuration .
The page shown in Figure 7-34 is displayed.
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Figure 7-34 SIM Configuration tab page
Step 6 Set parameters according to Table 7-11.
Table 7-11 Parameter description (3)
Parameter
Description
PIN Lock

Enable: You must enter a PIN code in the SIM Card State text
box on the 3G Status tab page when a SIM card is inserted
again or is recovered from power-off. Obtain the PIN code from
network carriers. This improves SIM card security.
NOTE
If you enter incorrect PIN codes for three consecutive times, the SIM card is
locked. To unlock the SIM card, contact network carriers.

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Disable: A PIN code is not required when a SIM card is inserted
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Description
again or is recovered from a power-off.
Click
Network Mode
to save the settings.

3G Preferred: Use 3G in preference and use 2G only when 3G is
unavailable.

3G Only: Use only 3G.

2G Only: Use only 2G.
Click
to save the settings.
----End
Verification
To verify that the 3G backup function takes effect, proceed as follows:
Step 1 Disconnect the ADSL port or WAN port.
Step 2 Click the 3G Configuration tab, and verify that the value of Connection Status is
Connected. If the value is Disconnected, check the 3G configurations.
If you set the 3G backup mode to Manual, connect the EGW1520 to the 3G network manually when the
ADSL or WAN port is disconnected.
Step 3 Use the Microsoft Internet Explorer on a computer to browse an external web page.
----End
If you can browse web pages and make calls, the 3G backup is effective. If the 3G backup is
ineffective, contact the network carrier.
7.3 Voice (UC Mode)
In the eSpace UC solution, the EGW1520 is deployed at a small branch of an enterprise to
provide network access functions for the small branch. Phones at the branch are registered
with the SIP server on the central node at the headquarters. Numbers of the branch users are
allocated by the SIP server at the headquarters and synchronized by the EGW1520 with the
data synchronization server. The EGW1520 can also function as a trunking gateway to
implement incoming and outgoing call functions through the FXO port for the local PSTN.
7.3.1 Voice Access
This topic describes the voice function provided by the EGW1520 in the eSpace UC solution.
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Description
This topic describes the registration and call process when the EGW1520 functions as the
voice access device.
Registration with Multiple Servers and Call Process
In UC mode, the EGW1520 can register with multiple SIP servers (both the active and
standby SIP servers) simultaneously. The EGW1520 registers POTS users to the SIP server at
the central node. SIP users (such as IP phone and IAD users) use SIP to directly register with
the SIP server at the central node. All calls are processed by the SIP server at the central node.
Figure 7-35 shows the registration with multiple servers.
Figure 7-35 Registration with multiple servers
When the EGW1520 registers with multiple SIP servers, the call processes are as follows:

User A calls user B.
1.
User A sends a call request to the SIP server at the central node through the EGW1520.
2.
The SIP server processes the request and then transfers the call to user B.
3.
User B picks up the phone and the call is set up.

User B calls user C.
1.
User B sends a call request to the SIP server in at the headquarters' central node through
the EGW1520.
2.
The SIP server processes the request and then transfers the call to user C.
3.
User C picks up the phone and the call is set up.

User C calls an external user of the enterprise.
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1.
User C sends a call request to the SIP server in at the headquarters' central node through
the EGW1520.
2.
The SIP server processes the request and transfers the call the IMS/NGN or PSTN
network.
3.
The external user picks up the phone and the call is set up.
Local Survival
The EGW1520 supports the local survival function. When the EGW1520 is disconnected
from the primary and secondary SIP servers, it automatically switches to the local survival
mode. In this mode, the EGW1520 functions as a local SIP server for internal users to register
with. All calls connected to the EGW1520 are processed by the EGW1520. Outgoing calls are
made through the FXO port.
The EGW1520 sends heartbeat detection messages to both the active and standby servers.
When either server recovers, the EGW1520 automatically disables the local survival mode.
Data Synchronization
In UC mode, you do not need to configure internal user numbers on the EGW1520. All user
numbers are allocated and synchronized to the EGW1520 by the data synchronization server
such as the BMP.
Users can only view phone number information on the web page of the EGW1520. They
cannot change the information.
Figure 7-36 shows the typical network of data synchronization.
Figure 7-36 Typical network of data synchronization
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Before the configuration, collect the user quantity in a branch and apply to the enterprise IT
administrator for number allocation. Then the SIP server allocates user numbers and the
EGW1520 synchronizes the user numbers with the data synchronization server.
The data synchronization mechanism is as follows:

The EGW1520 initiates data synchronization. The EGW1520 sends a data
synchronization request to the data synchronization server when the EGW1520 restarts,
data synchronization server information on the EGW1520 changes, or the EGW1520
switches from the local survival mode to another mode.

The data synchronization server initiates data synchronization. The data synchronization
server regularly sends data synchronization requests to the EGW1520 to ensure user data
consistency between them.

A maximum of 20 SIP users.

One FXS port, connecting to one POTS user.

A maximum of 8-channel users (SIP users and POTS users) can simultaneously initiate
calls. Standards supported by voice service:
Specification
−
G.711 A, G.711 u, G.729, G.726, and G.722
−
SIP (RFC 3261–3265)
−
SIP Session Timers (RFC 4028)
−
SDP (RFC 2327)
−
RTP or RTCP
−
RFC 2833
Configuration
In UC mode, all phones connected to the EGW1520 are registered with the SIP server at the
headquarters. Before the configuration, apply to the enterprise IT administrator for number
allocation.
Prerequisite

You have logged in to the web management system. For details, see 7.7.1 Web
Management.

The EGW1520 has connected to the uplink network. For details, see 7.2 Connection
Modes.
Before the configuration, collect the user quantity in a branch and apply to the enterprise IT
administrator for number allocation.
Example
Network Plan Example
Figure 7-37 shows the network in which the EGW1520 connects to the SIP server at the
headquarters.
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Figure 7-37 EGW1520 network
Analog phones are connected to the PHONE ports of the EGW1520, and IP phones are
connected to the EGW1520 through the switch. You can also use network cables to connect IP
phones to LAN ports of the EGW1520.
Data Plan Example
Table 7-12 describes the server information to be obtained from the enterprise IT
administrator.
Table 7-12 Headquarters server information
Server Information
Example
Information about the
SIP server at the
headquarters' central
node

Address type: IP address

Address: 192.169.10.90

Network type: IMS
Information about the
data synchronization
server (BMP)

IP address: 192.169.10.99

Port number: 8098
Procedure
Step 1 On the web management system, choose Voice > SIP Server from the navigation tree.
Step 2 Click Enable for UC Mode.
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7 Feature Description and Implementation
The page shown in Figure 7-38 is displayed.
Figure 7-38 Configuring a registration server
Step 4 Set parameters according to Table 7-13.
Table 7-13 Registration server parameters
Parameter
Description
IP
IP address of the data synchronization server (such as the BMP). The
value is provided by the enterprise IT administrator.
Port
Port number of the data synchronization server (such as the BMP). The
value is provided by the enterprise IT administrator. If it is not
provided, use the default value 8098.
DataSync Key
Data synchronization key. When the EGW1520 synchronizes data with
the data synchronization server, the synchronization keys of the
EGW1520 and the data synchronization server must be the same.
Otherwise, the EGW1520 denies data synchronization.
The value is a string of 1 to 32 characters that can be digits, letters, and
special characters. For the detailed configuration rule, contact the
enterprise IT administrator.
Working Mode
Option Interval

Master: active server. The server that is added first is the active
server.

Slave: standby server.
Interval for sending heartbeat detection messages to the active and
standby server. The value ranges from 30 to 150, in seconds. The
default value 90 is recommended.
NOTE
In UC mode, the EGW1520 sends heartbeat detection messages to both the
active and standby servers.
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Parameter
Description
Address Type
Address type of the SIP server. The options are IP address or domain
name. The value is provided by the enterprise IT administrator.
IP/Domain
IP address or DNS domain name of the SIP server. The value is
provided by the enterprise IT administrator.
NOTE
If you select Domain, configure the DNS server when configuring the WAN
uplink mode.
DNS Type
IP address parsing mode of the DNS. This parameter is valid when
Address Type is set to Domain.

SRV: A domain name can be mapped to multiple IP addresses. The
two IP addresses of the highest priority are used as the IP addresses
of the active and standby SIP servers.
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
SIP network type inside the enterprise. Generally, set the network type
to NGN if the eSpace U1900 is used or IMS if the eSpace U2900 is
used. For details, contact the enterprise IT administrator.
Port
Port number of the SIP server. The value is provided by the network
carrier. The default value 5060 is recommended.
Expiration Time
Interval for the registration group to register POTS users in the group
with the SIP server. The value ranges from 0 to 14400, in seconds. The
default value 360 is recommended.
Step 5 Click
to save the settings.
After the enterprise IT administrator allocates numbers to users connected to the EGW1520 on the SIP
server at the headquarters, and the EGW1520 synchronizes data with the data synchronization server,
you can choose Voice > Phone Allocation to query the allocated user numbers. If the user numbers
cannot be found, query again after you restart the EGW1520 or the EGW1520 synchronizes data with
the data synchronization server.
Step 6 Register IP phones with the SIP server at the headquarters.
See the IP phone manual to configure the IP address and internal number of the IP phone, IP
address of the SIP server at the headquarters, and IP address of the EGW1520 to register the
IP phone with the SIP server and the EGW1520.
Step 7 Configure the VPN tunnel.
VPN ensures secure communication between branches and headquarters. For details about
VPN configuration, see 7.5.6 VPN.
----End
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Verification

Use a POST or IP phone connected to the EGW1520 to call a phone number outside the
enterprise. Verify that the call is set up successfully.

Use a POST phone to call an IP phone that is connected to the same EGW1520 with the
POST phone. Verify that the call is set up successfully.
7.3.2 FXO Port
The topic describes the principle, specification, and limitation, and implementation for the
FXO port on the EGW1520 in UC mode.
Description
The EGW1520 provides four FXO ports used to connect to PSTN networks, allowing voice
users on the EGW1520 to communicate with PSTN users.
Principle
The EGW1520 provides an FXO port for connecting to the PSTN network. An external user
dials the number that the PSTN carrier allocates to the FXO port to make an incoming call.
An internal user dials the outgoing prefix and an external user's number to make an outgoing
call through an FXO port. During an outgoing call, the EGW1520 functions as the PSTN
landing gateway, implementing local outgoing calls and helping reduce toll call fees.
The EGW1520 supports the switchboard, DDI, and dedicated line functions. By default, the
switchboard function is enabled.
Implementation for the Switchboard
Figure 7-39 shows the application scenario for the switchboard.
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Figure 7-39 Application scenario for the switchboard
The call process for the switchboard is as follows:
Outgoing call
1.
An internal user dials the outgoing prefix for the FXO port (for example, 0571) and the
number of an external user.
2.
The SIP server at the headquarters determines the location of the number based on the
outgoing prefix, and sends the outgoing prefix and the external user's number to the
landing gateway in the corresponding branch.
3.
The landing gateway in the branch automatically queries an idle non-dedicated FXO port
for the user to make the outgoing call.
A non-dedicated FXO port is a port for which the dedicated line is not configured. For details about the
dedicated line, see Implementation for the Dedicated Line.
4.
The external user answers the call.
The number that the PSTN network carrier allocates to the FXO port is displayed to the called party.
5.
One party hangs up the phone to end the call.
Incoming call
1.
An external user dials the number that the PSTN network carrier allocates to the FXO
port, that is, the switchboard number.
The external user hears an announcement, for example, "Thanks for calling XX company.
Please dial the extension number. To query numbers, dial 9. End the number with a
pound key."
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2.
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The external user dials an extension number (internal number of any internal user) or
dials 9 (to connect to the preset attendant number) as prompted, and presses the pound
key (#).
If the extension number does not belong to the branch where the switchboard is located, the EGW1520
sends the number to the SIP server at the headquarters. The SIP server at the headquarters automatically
queries the corresponding internal user.
3.
The internal user or attendant answers the call.
4.
One party hangs up the phone to end the call.
Implementation for the DDI
The DDI binds an internal user to an FXO port. When an external user makes an incoming
call to the internal user through the FXO port, the call is directly connected to the internal user.
After the DDI is configured for an FXO port, other users can still make outgoing calls through
the FXO port.
Figure 7-40 shows the application scenario for the DDI.
Figure 7-40 Application scenario for the DDI
A DDI user can be bound to an FXO port in the same branch or in another branch as shown in Figure
7-40.
The call process for the DDI is as follows:
Outgoing call
1.
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An internal user dials the outgoing prefix for the FXO port (for example, 0571) and the
number of an external user.
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2.
The SIP server at the headquarters determines the location of the number based on the
outgoing prefix, and sends the outgoing prefix and the external user's number to the
landing gateway in the corresponding branch.
3.
The landing gateway in the branch automatically queries an idle non-dedicated FXO port
for the user to make the outgoing call.
A non-dedicated FXO port is a port for which the dedicated line is not configured. For details about the
dedicated line, see Implementation for the Dedicated Line.
4.
The external user answers the call.
The number that the PSTN network carrier allocates to the FXO port is displayed to the called party.
5.
One party hangs up the phone to end the call.
Incoming call
1.
An external user dials the number that the PSTN network carrier allocates to the FXO
port.
2.
The phone of the DDI user bound to the FXO port (for example, internal user 1 in Figure
7-40) rings.
3.
The DDI user answers the call.
4.
One party hangs up the phone to end the call.
Implementation for the Dedicated Line
The dedicated line binds an internal user to an FXO port and sets the FXO port to be a
dedicated port. When an external user makes an incoming call to the internal user through the
FXO port, the call is directly connected to the internal user. Only the internal user can use the
FXO port to make outgoing calls.
Figure 7-41 shows the application scenario for the dedicated line.
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Figure 7-41 Application scenario for the dedicated line
A dedicated user can be bound an FXO port in the same branch or in another branch as shown in Figure
7-41.
The call process for the dedicated line is as follows:
Outgoing call

If the external user and the FXO port that the dedicated user is bound to are not in the
same branch, the call process is similar to that for the switchboard. For details, see Flow
of Outgoing Calls Through the Switchboard.

If the external user and the FXO port that the dedicated user is bound to are in the same
branch, the call process is as follows:
1.
A dedicated user (for example, internal user 1 in Figure 7-41) dials the FXO outgoing
prefix (configurable, for example, 0) and an external user's number.
2.
The SIP server at the headquarters sends the outgoing prefix and the external user's
number to the landing gateway in the branch where the FXO port bound to the dedicated
user is located.
3.
The EGW1520 automatically queries the FXO port bound to the user for the user to
make the outgoing call.
If the bound FXO port is unavailable (for example, no phone line is connected to the FXO port), the
EGW1520 automatically queries a non-dedicated idle FXO port for the user to make the outgoing call.
4.
The external user answers the call.
The number that the PSTN network carrier allocates to the FXO port is displayed to the called party.
5.
One party hangs up the phone to end the call.
Incoming call
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1.
An external user dials the number that the PSTN network carrier allocates to the FXO
port.
2.
The phone of the dedicated user bound to the FXO port (for example, internal user 1 in
Figure 7-41) rings.
3.
The dedicated user answers the call.
4.
One party hangs up the phone to end the call.
Specification
Four FXO ports..
Limitation

The FXO port supports only the one-stage dialing mode.

Each FXO port allows one user to make an outgoing or incoming call through the FXO
port at the same time.
Configuring an Outgoing Prefix
This topic describes how to configure an outgoing prefix for the FXO port on the EGW1520.
After the outgoing prefix is configured, an intra-office user can dial the outgoing prefix and
the number of an outer-office user to make an outgoing call through the FXO port.
Prerequisite
You have logged in to the web management system. For details, see 7.7.1 Web Management.
Principle
The outgoing call prefix must match the outgoing call prefix configured on the SIP server at
the central node. Based on whether the SIP server at the center node deletes the outgoing
prefix, the outgoing prefix configuration is classified into the following modes. For details
about the configuration modes, contact the IT administrator at the enterprise headquarters.

The SIP server at the central node does not delete the outgoing prefix.
Configure an outgoing prefix (such as 0571) for each branch to identify the area where a
branch is located. The outgoing prefix for each branch must be unique. For e xample, the
outgoing prefixes of branch A and branch B are 0571 and 0755 respectively. If user D
dials 057112345678, the SIP server at the headquarters determines that the number
belongs to branch A according to the prefix and sends the number 057112345678 to the
EGW1520 at branch A.

The SIP server at the central node deletes the outgoing prefix.
Configure at least two outgoing prefixes for each branch. One prefix identifies the area
where the branch is located and the other prefix is the same as a prefix on the SIP server
at the central node. For example, the outgoing prefixes of branch A are 0571 and 0.
When user D dials 057112345678, the SIP server at the headquarters receives the number,
deletes the prefix 0571, adds the new prefix 0, and sends the new number 012345678 to
the EGW1520 at branch A.
Procedure
Step 1 On the web management system, choose Voice > FXO Configuration.
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Step 2 Click
The page shown in Figure 7-42 is displayed.
Figure 7-42 Configuring an outgoing prefix for the FXO port
Step 3 Set parameters according to Table 7-14.
Table 7-14 FXO prefix parameters
Parameter
Description
Prefix
Outgoing prefix for the FXO port. The value is a number of 1 to 30 digits.
An intra-office user can dial the outgoing prefix to make an outgoing call
through the FXO port. For details, see Description.
NOTE
 A maximum of 16 outgoing prefixes can be configured for the FXO port on the
EGW1520.

Property
The outgoing prefix must not conflict with internal numbers and emergency
numbers. Once an outgoing prefix plus an outer-office number are the same as an
internal number, the call will fail to be made towards the outer-office user.
Instead, the internal user is connected.

Remove: The outgoing prefix is deleted for outgoing calls.

Retain: The outgoing prefix is not deleted for outgoing calls. This
mode is applicable to the situation where the outgoing prefix is the
same as the first digit in the outer-office number.
NOTE
The number that the PSTN network carrier allocates to the FXO port is displayed to
the called party.
Step 4 Click
to save the settings.
----End
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Verification
Step 1 An internal user dials the outgoing prefix for the FXO port (for example, 0571) and the
number of an external user.
Step 2 The external user answers the call.
----End
Verify that the call is set up successfully; otherwise, check the configuration.
Configuring the Switchboard
This topic describes how to configure the switchboard on the EGW1520.
Prerequisite
You have logged in to the web management system. For details, see 7.7.1 Web Management.
Background
For details about the application scenario and call process for the switchboard, see
Description.

The switchboard function conflicts with the DDI and dedicated line functions. If the DDI
or dedicated line function is enabled, choose Voice > FXO Configuration and delete the
binding number on the FXO Toggle tab page before configuring the switchboard function.

By default, the switchboard function is enabled on the EGW1520. The following only
describes how to configure attendant numbers. If you do not need to configure attendants,
skip the following steps.

Default voice prompts are loaded on the EGW1520 before delivery. To customize voice
prompts, see Customizing Voice Prompts for the Switchboard.
Procedure
If you want to make an outgoing call, configure an outgoing prefix when you configure the switchboard.
For the configuration method, see Configuring an Outgoing Prefix.
Step 1 On the web management system, choose Voice > FXO Configuration.
Step 2 Click the Operator Configure tab.
The page shown in Figure 7-43 is displayed.
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Figure 7-43 Configuring an attendant
Step 3 Click
The page shown in Figure 7-44 is displayed.
Figure 7-44 Selecting a user
Step 4 Select an internal number as the attendant number, and click
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Step 5 Click
7 Feature Description and Implementation
to save the settings.
----End
Verification
Verification Incoming call
Incoming call
Step 1 An outer-office user dials the number that the PSTN network carrier allocates to the FXO port,
that is, the switchboard number.
Step 2 The outer-office user dials an extension number (internal number) or dials 9 (to connect to the
preset attendant number) as prompted, and presses the pound key (#).
Step 3 The intra-office user or attendant answers the call.
----End
Verify that the call is set up successfully; otherwise, check the configuration.
Outgoing call
Outgoing call
Step 1 An internal user dials the outgoing prefix for the FXO port (for example, 0) and the external
user number.
Step 2 The external user answers the call.
----End
Verify that the call is set up successfully; otherwise, check the configuration.
Verify that the call is set up successfully; otherwise, check the configuration.
Configuring the DDI and Dedicated Line
This topic describes how to configure the DDI and dedicated line on the EGW1520.
Prerequisite
You have logged in to the web management system. For details, see 7.7.1 Web Management.
Background
For details about the application scenario and call process for the DDI and dedicated line, see
Description.
The priority of the DDI or dedicated line is higher than that of the switchboard. When the DDI or
dedicated line is configured, the switchboard automatically becomes invalid.
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Procedure
If you want to make an outgoing call, configure an outgoing prefix when you configure the DDI and
dedicated line. For the configuration method, see Configuring an Outgoing Prefix.
Step 1 On the web management system, choose Voice > FXO Configuration from the navigation
tree.
Step 2 Click the FXO Toggle tab.
The page shown in Figure 7-45 is displayed.
Figure 7-45 Configuring the FXO binding number
Step 3 Select the FXO port you want to configure, set parameters according to Table 7-15.
Table 7-15 Configuring the DDI and dedicated line
Parameter
Description
Toggle Number
Internal number bound to the FXO port,
which can be an internal number in the local
or other branch.
Private Line
Indicates whether to enable the dedicated
line function.
Step 4 Click
to save the settings.
----End
Verification
Incoming call
Step 1 An external user dials the number that the PSTN network carrier allocates to the FXO port.
Step 2 The phone of the internal user whose number is bound to the FXO port rings.
Step 3 The internal user answers the call.
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----End
Verify that the call is set up successfully; otherwise, check the configuration.
Outgoing call
Step 1 An internal user dials the outgoing prefix for the FXO port (for example, 0) and the external
user number.
Step 2 The external user answers the call.
----End
Verify that the call is set up successfully; otherwise, check the configuration.
7.3.3 Power-off Survival
The FXO1 port of the EGW1520 can be used as a power-off survival port. When the
EGW1520 is powered off, the analog phone connected to the PHONE port can be connected
to the PSTN through the FXO1 port.
Principle and Implementation
When the EGW1520 is powered off, the PHONE port automatically connects to the FXO1
port.
Generally, the EGW1520 power-off survival function is available once the cables are
connected. You do not need to configure the function on the web management system. The
cables are connected as follows:

The FXO1 port on the EGW1520 has been connected to the PSTN.

An analog phone has been connected to the PHONE port on the EGW1520.
When the EGW1520 is powered off, it automatically connects the analog phone connected to
the PHONE port to the PSTN, as shown in Figure 7-46.
Figure 7-46 Power-off survival
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
When the power-off survival function is enabled, the number of the analog phone
connected to the PHONE port changes from the external number to the FXO1 port number,
and the dialing rule changes from the EGW1520 dialing rule to the PSTN dialing rule.

After the power-off survival function is enabled, the ongoing call does not end after the
EGW1520 powers on again, but the voice services cannot be used until the call ends.

After the power-off survival function is enabled, the FXO switchboard, DDI, and
dedicated line functions cannot be used.
To verify that the power-off survival function is enabled, perform the following steps:
1.
Cut the power supply of the EGW1520.
2.
Use an analog phone that is connected to the PHONE port to call an external number.
If the call is connected, the power-off survival function is enabled. If the call is disconnected,
check the connections between the PHONE port and the analog phone, and between the
EGW1520 FXO1 port and the PSTN.
Specification
One PSTN Power-off survival port.
Limitation

The Power-off survival function is available only when a power off occurs.

Only the Analog Phone that connects to the PHONE port supports Power-off survival
function.
7.3.4 Fax Service
The EGW1520 supports fax service.
Fax is a form of telegraphy for the transmission of fixed images with a view to their
reproduction in a permanent form. In ITU-RV.662, faxing is defined as a form of
telecommunication for the reproduction at a distance of graphic documents in the form of
other graphic documents geometrically similar to the original.
Description
This topic describes the principle, implementation, specification, and limitation of the fax
service.
By transmission rate, faxes are divided into low-speed faxes (<= 14.4 kbit/s) and high-speed
faxes (> 14.4 kbit/s).
Low-speed faxes on an IP network are divided into transparently transmitted faxes (using
G.711A or G.711u) and T.38 faxes. High-speed faxes, however, can only use G.711A or G.711u
featuring low compression rate due to the requirement for high quality.
The EGW1520 supports T.38 and transparent fax.
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Principle
The fax service establishes a voice channel and switches the voice channel to a fax channel,
including the IP address, port, codec, and channel types (audio, fax, and data).
The voice channel is switched to a fax channel after the access device detects fax signals. The
access device checks fax signals to determine whether the current fax is a high-speed or
low-speed fax, and then delivers the fax signals to the NGN or IMS.
The EGW1520 supports T.38 and transparent fax.
Transparent fax: Fax signals are transmitted transparently as G.711 packets. G.711 faxes
feature low delay and simple implementation, but they occupy a high bandwidth (fixed at 64
kbit/s) and are easily affected by network conditions. Therefore, G.711 faxes are
recommended on a good network condition and not recommended when network jitter or
packet loss frequently occur. G.711 faxes are applicable to high-speed and low-speed faxes.
T.38 fax: T.30 fax signals are converted to T.38 packets for transmission on a packet switching
network. T.38 faxes occupy a low bandwidth, provide high reliability with redundant frames
and forward error checking (FEC), and are slightly affected by the network condition.
However, the implementation is complicated. T.38 faxes are applicable only to low-speed fax
services due to delay generated by the packet switching network.
Implementation
EGW1520 internal faxing
The EGW1520 can access a fax machine through an FXS port. When two internal fax
machines communicate with each other, the SIP server at the central center controls the fax
call process. Figure 7-47 shows the network diagram.
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Figure 7-47 EGW1520 internal faxing
The SIP server at the central node controls call signaling. The EGW1520 detects fax signals.
The process for making a fax call is similar to that for making a call between two internal
phones. After a call is made, the EGW1520 checks the fax signals and negotiates with the
called and calling users about the fax media information. After the negotiation is successful,
the voice channel is switched to the fax channel. Then the fax call is established. After the fax
call is complete, the EGW1520 detects the fax ending signals and switches to the voice
channel.
EGW1520 external faxing
When an internal fax machine communicates with an external fax machine, the fax service
can be implemented through FXO ports or softswitch. The SIP server at the central node
controls the external fax call process implemented through FXO ports. The softswitch
(IMS/NGN) controls the external fax call process implemented through the softswitch. Figure
7-48 shows the network diagram when the softswitch is used.
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Figure 7-48 EGW1520 external faxing
The NGN or IMS controls call signaling. The EGW1520 detects fax signals and encodes and
decodes IP voice packets. After a fax call is established, fax media streams are transmitted
over an IP network. The process for making a fax call is similar to that for making a call
between an internal phone and an external phone. After the fax call is complete, the
EGW1520 detects the fax ending signals and sends them to the NGN or IMS. The NGN or
IMS negotiates with the calling and called users about the fax media information. After the
negotiation is successful, the EGW1520 switches to the fax channel according to the NGN or
IMS's signaling to establish a fax call. After the fax call is complete, the EGW1520 detects the
fax ending signals and sends them to the NGN or IMS. Then the NGN or IMS switches to the
voice channel.
Specification
Standards supported by fax service:

One FXS ports for fax machines

T.30

T.38

V.17/V.21/V.27/V.29/V.34
Limitation
N/A
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Configuring the Fax Service
Generally, the EGW1520 faxing function is available once the cables are connected, you do
not need to configure the function on the web management system. This topic describes how
to set the advanced parameters for faxing.
Prerequisites
You have logged in to the web management system. For details, see 7.7.1 Web Management.
Configuring the Priority
Step 1 On the web management system, choose Voice > Voice Parameters from the navigation tree.
Step 2 Click the DSP tab.
The page shown in Figure 7-49 is displayed.
Figure 7-49 DSP tab page
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Step 3 Set parameters according to Table 7-16.
Table 7-16 DSP parameters
Parameter
Description
Codec
DSP codec type. If multiple options are selected, the system sends
messages based on the specified codec rank. By default, all options
are selected.
NOTE
Compared with other codec types, G729, G726, and G722 consume more
DSP resources.
Codec Ptime (ms)
For each codec type, you can change the duration of packaging
voice streams to 10 ms, 20 ms, or 30 ms. The default value is 20
ms.
Echo Cancellation
Indicates the echo cancellation switch. The options are Enable and
Disable, and the default value is Enable.
The high-speed transparent transmission mode has the echo
processing mechanism. You are advised to disable the echo
cancellation function for the high-speed transparent transmission
mode and enable this function for low-speed transparent
transmission mode.
Enable Silence
Suppress
Indicates the silence suppression switch. The options are Enable
and Disable. The default value is Enable, which indicates that the
system sends silence packets if no voice packet is available.
Receive Gain (dB)
Indicates the receiving gain of DSP chips. The value ranges from
–14 to 6. The default value is 0.
Send Gain (dB)
Indicates the sending gain of DSP chips. The value ranges from
–14 to 6. The default value is 0.
Fax Prior Mode
Indicates the fax transmission mode. The options are as follows:

T38: Only T38 is supported.

VBD: Only voice band data (VBD) is supported.

T38-VBD: Both T38 and VBD are supported, and T38 has a
higher priority.

VBD-T38: Both T38 and VBD are supported, and VBD has a
higher priority.
The default value is VBD-T38.
Media Negotiation
Mode
Indicates the priority used in media negotiation.

Prefer remote codec: During media negotiation, the codec
priority at the remote end is preferred.

Prefer local codec: During media negotiation, the codec priority
at the local end is preferred.
The default value is Prefer remote codec.
DTMF Transfer
Mode
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Indicates the transmission mode in a session.

RFC2833: RFC2833 transmission mode.

Transfer: transparent transmission mode. Dialing tones are
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Parameter
Description
transmitted transparently as voice signals.
The default value is RFC2833.
VBD Mode
Indicates the codec type for transparent transmission. The options
are G711A and G711U, and the default value is G711A.
Step 4 Click
to save the settings.
----End
Viewing T38 Fax Parameters
Step 1 On the web management system, choose Voice > Voice Parameters from the navigation tree.
Step 2 Click the T38 tab.
The page shown in Figure 7-50 is displayed.
Figure 7-50 T38 tab page
Step 3 Set parameters according to Table 7-17.
Table 7-17 T.38 fax parameters
Parameter
Description
Fax Rate
Indicates the faxing rate mode. Value transferredTcf indicates
remote training mode.
UDPEC
Indicates the UDP redundancy correction capability. The
EGW1520 supports t38udpredundancy. If the redundancy
correction capability is carried in fax negotiation signals, the
EGW1520 uses the redundancy technology to send T38 data when
the peer end also supports redundancy.
Max Rate
Indicates the maximum faxing rate. If the maximum faxing rate at
the peer end is smaller than that at the local end, use the smaller
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Parameter
7 Feature Description and Implementation
Description
one; otherwise, use the value of this parameter.
Transport Protocol
Indicates the transmission protocol. The EGW1520 supports UDP.
----End
7.3.5 Voice Parameters
This topic describes how to set voice parameters. Only network administrators can change the
parameter settings. To ensure the normal running of the EGW1520, you are advised to use the
default settings.
Prerequisites
You have logged in to the web management system. For details, see 7.7.1 Web Management.
Configuring the Region
On the Region tab page, specify analog phone standards in different countries. Dialing tones
and signal tone frequency vary according to area and country. Configure the parameters based
on requirement.
Step 1 On the web management system, choose Voice > Voice Parameters from the navigation tree.
The page shown in Figure 7-51 is displayed.
Figure 7-51 Region tab page
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Step 2 Set parameters according to Table 7-18.
Table 7-18 Region parameters
Parameter
Description
Current Country
Country name.
Slic Gain RX (dB)
Receiving gain of an analog phone. The value ranges from -12 dB
to +6 dB.
Slic Gain TX (dB)
Sending gain of an analog phone. The value ranges from -12 dB to
+6 dB.
FlashHook Max (ms)
Maximum interval for pressing the hook flash button. The value
ranges from 0 to 1000, in milliseconds. If the hook flash button is
not pressed within the duration specified by this parameter, the
call will end.
FlashHook Min (ms)
Minimum interval for pressing the hook flash button. The value
ranges from 0 to 1000, in milliseconds. If the interval is smaller
than the value of this parameter, the hook flash operation does not
take effect.
OnHook Min (ms)
Minimum interval for confirming hang-up. The value ranges from
0 to 2000, in milliseconds. If the hang-up interval is smaller than
the value of this parameter, the hang-up operation does not take
effect.
OffHook Min (ms)
Minimum interval for confirming pickup. The value ranges from 0
to 2000, in milliseconds. If the pickup interval is smaller than the
value of this parameter, the pickup operation does not take effect.
Step 3 Click
to save the settings.
----End
Configuring the DSP
On the DSP tab page, configure voice quality information about DSP chips, such as codec
type, noise and echo cancellation, silence suppression, and gains.
Step 1 On the web management system, choose Voice > Voice Parameters from the navigation tree.
Step 2 Click the DSP tab.
The page shown in Figure 7-52 is displayed.
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Figure 7-52 DSP tab page
Step 3 Set parameters according to Table 7-19.
Table 7-19 DSP parameters
Parameter
Description
Codec
DSP codec type. If multiple options are selected, the system sends
messages based on the specified codec rank. By default, all options
are selected.
NOTE
Compared with other codec types, G729, G726, and G722 consume more
DSP resources.
Codec Ptime (ms)
For each codec type, you can change the duration of packaging
voice streams to 10 ms, 20 ms, or 30 ms. The default value is 20
ms.
Echo Cancellation
Echo cancellation switch. The options are Enable and Disable,
and the default value is Enable.
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Parameter
Description
Enable Silence
Suppress
Silence suppression switch. The options are Enable and Disable.
The default value is Enable, which indicates that the system sends
silence packets if no voice packet is available.
Receive Gain (dB)
Receiving gain of DSP chips. The value ranges from -14 to 6. The
default value is 0.
Send Gain (dB)
Sending gain of DSP chips. The value ranges from -14 to 6. The
default value is 0.
Fax Prior Mode
Fax transmission mode. The options are as follows:

T38: Only T38 is supported.

VBD: Only voice band data (VBD) is supported.

T38-VBD: Both T38 and VBD are supported, and T38 has a
higher priority.

VBD-T38: Both T38 and VBD are supported, and VBD has a
higher priority.
The default value is VBD-T38.
Media Negotiation
Mode
Priority used in media negotiation.

Prefer remote codec: During media negotiation, the codec
priority at the remote end is preferred.

Prefer local codec: During media negotiation, the codec priority
at the local end is preferred.
The default value is Prefer remote codec.
DTMF Transfer
Mode
Transmission mode in a session.

RFC283: RFC2833 transmission mode.

Transfer: transparent transmission mode. Dialing tones are
transmitted transparently as voice signals.
The default value is RFC2833.
VBD Mode
Codec type for transparent transmission. The options are G711A
and G711U, and the default value is G711A.
Step 4 Click
to save the settings.
----End
Configuring RTP
On the RTP tab page, set the parameters used for playing voices on analog phones such as the
maximum and minimum media port numbers.
Step 1 On the web management system, choose Voice > Voice Parameters from the navigation tree.
Step 2 Click the RTP tab.
The page shown in Figure 7-53 is displayed.
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Figure 7-53 RTP tab page
Step 3 Set parameters according to Table 7-20.
Table 7-20 RTP parameters
Parameter
Description
Min UDP Port
Minimum media port number used for playing voices on
analog phones.
Max UDP Port
Maximum media port number used for playing voices on
analog phones.
DTMF (RFC2833)
Whether RFC2833 is used for encryption. The options are
Enable and Disable.
Payload Type: payload for RFC2833 used for encryption. The
value must be unique on the EGW1520. It is recommended that
you set this parameter to the payload type of the softswitch. If
the parameter value is different from that on the softswitch, call
connections may fail to be set up.
RTCP
Whether to enable the RTCP function. The options are Enable
and Disable. The default value is Disable.
After changing the UDP port number, restart the device to make the configuration take effect.
Step 4 Click
to save the settings.
----End
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Viewing T38 Fax Parameters
On the T38 tab page, you can view T.38 fax parameters.
Step 1 On the web management system, choose Voice > Voice Parameters from the navigation tree.
Step 2 Click the T38 tab.
The page shown in Figure 7-54 is displayed.
Figure 7-54 T38 tab page
Step 3 Set parameters according to Table 7-21.
Table 7-21 T38 fax parameters
Parameter
Description
Fax Rate
Faxing rate mode. Value transferredTcf indicates remote training
mode.
UDPEC
UDP redundancy correction capability. The EGW1520 supports
t38udpredundancy. If the redundancy correction capability is
carried in fax negotiation signals, the EGW1520 uses the
redundancy technology to send T38 data when the peer end also
supports redundancy.
Max Rate
Maximum faxing rate. If the maximum faxing rate at the peer end
is smaller than that at the local end, use the smaller one; otherwise,
use the value of this parameter.
Transport Protocol
Transmission protocol. The EGW1520 supports UDP.
----End
Configuring SIP
On the SIP tab page, configure the timeout interval for local SIP users to register with the
EGW1520.
Step 1 On the web management system, choose Voice > Voice Parameters from the navigation tree.
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Step 2 Click the SIP tab.
The page shown in Figure 7-55 is displayed.
Figure 7-55 SIP tab page
Step 3 Set parameters according to Table 7-22.
Table 7-22 SIP parameters
Parameter
Description
SIP Register Expire
(s)
Timeout interval for local SIP users to register with the EGW1520.
Local Subscribe
Expire (s)

Min: Minimum timeout interval for local SIP users to register
with the EGW1520. The default value is 120.

Max: Maximum timeout interval for local SIP users to register
with the EGW1520. The default value is 3600.
Timeout interval for local SIP users to subscribe to a service (such as
voice message and voice mailbox) with the EGW1520

Min: Minimum timeout interval for local SIP users to subscribe
to a service with the EGW1520. The default value is 120.

Max: Maximum timeout interval for local SIP users to subscribe
to a service with the EGW1520. The default value is 3600.
Network Subscribe
Expire (s)
Default timeout interval for the EGW1520 to subscribe to a service
with the NGN or IMS.
SIP Session Timer
Whether to use the session timer. The session timer is disabled by
default. When the session timer is enabled, the two parties can check
the conversation status using the update or reinvite signaling.
Step 4 Click
to save the settings.
----End
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Configuring SIP ALG
On the SIP ALG tab page, configure SIP servers in an outer office.
Step 1 On the web management system, choose Voice > Voice Parameters from the navigation tree.
Step 2 Click the SIP ALG tab.
The page shown in Figure 7-56 is displayed.
Figure 7-56 SIP ALG tab page
Step 3 Set parameters according to Table 7-23.
Table 7-23 SIP ALG parameters
Parameter
Description
Server port

Master: Port number used by the active SIP server to send and
receive packets.

Slave: Port number used by the standby SIP server to send and
receive packets.

Extended: Extended port number used by the SIP ALG to send
and receive packets.

Min: Minimum media port that can be used by the RTP server.

Max: Maximum media port that can be used by the RTP server.
RTP port
Step 4 Click
to save the settings.
----End
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7.4 Voice(Common Mode)
EGW1520 can function as a SIP trunk access device or a small-scale Internet protocol-private
branch exchange (IP-PBX). It provides basic voice services and supplementary services.
7.4.1 Voice Access and IP PBX
This topic describes the SIP trunk access and IP-PBX functions of EGW1520.
Description
The EGW1520 is deployed at the headquarters of an enterprise to connect to IADs, fax
machines, IP phones, multimedia soft terminals, and WiFi terminals to implement voice user
registration, call control, and protocol processing and provide rich voice services for
enterprise users. In addition, the EGW1520 can work as a SIP trunk device to register users
with the softswitch (NGN/IMS) and cooperate with the softswitch to process SIP signaling
interaction, so that enterprise users can use services provide by the softswitch.
Working Principle (SIP Trunk)
A SIP trunk is a SIP link between a SIP trunk device and the SIP server. When an intra-office
user calls an outer-office user, the SIP trunk device sends a message to the SIP server through
the trunk. Then, the SIP server responds to the message and sets up the call between the two
users. All the signaling and media streams between the SIP trunk and SIP server are
transmitted over an IP network.
SIP trunks usually function in the following modes:

Registration mode
The IP address of the SIP server is configured on the SIP trunk device. The SIP trunk
device sends a SIP REGISTER registers to the SIP server to create a dynamic SIP trunk
link.

Static mode
A SIP trunk device and a SIP server are equivalent NEs. The static IP address of the
device is configured on the server and the static IP address of the server is configured on
the device. A static SIP trunk is created between the device and the server.
As a SIP trunk device, the EGW1520 supports the SIP trunk in registration mode. Intra-office
calls are processed by the EGW1520. When there are outer-office calls, the EGW1520
cooperates with the softswitch (IMS/NGN) through the SIP trunk to process the SIP signaling
interaction.
Figure 7-57 shows the networking where the EGW1520 functions as a SIP trunk device.
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Figure 7-57 Connecting to the IMS/NGN through a SIP trunk
EGW1520's registration and calling process is as follows:
1.
The EGW1520 uses SIP Trunk to send a registration request to the softswitch
(NGN/IMS). the softswitch (NGN/IMS) processes the registration request. If the
authentication is successful, the softswitch (NGN/IMS) sends the success notification to
the EGW1520. If the authentication fails, the softswitch (NGN/IMS) sends the failure
notification to the EGW1520. When the registration is successful, EGW1520's SIP users
can make or receive calls.
2.
When an intra-office user makes a call, the EGW1520 analyzes the called number. If the
called user is an intra-office user, the EGW1520 enables the called user's Analog phone
to ring or sends a SIP message to the called user's SIP phone. The softswitch (NGN/IMS)
does not process SIP messages for intra-office calls. If the called user is an outer-office
user, the EGW1520 sends SIP requests to the softswitch (NGN/IMS). The EGW1520
cooperates with the softswitch to process the SIP signaling interaction.
The called and calling users of a intra-office call are connected to the same the EGW1520. The called
and calling users of an inter-office call are connected to different EGW1520s.
3.
When receiving a call, the EGW1520 analyzes the called number. If the called user
belongs to the EGW1520, the EGW1520 enables the called user's Analog phone to ring
or sends a SIP message to the called user's SIP phone. If the called user is using a SIP
phone, the EGW1520 also sends a SIP response to the peer device. If the called user does
not belong to the EGW1520, the call fails and the EGW1520 sends a SIP response to the
peer device.
Working Principle (IP-PBX)
When the EGW1520 connects to the PSTN as an IP-PBX, it implements call control, protocol
processing, and voice functions on its own. Outgoing calls are made through FXO ports of the
EGW1520.
Figure 7-58 shows the network diagram when the EGW1520 functions as an IP-PBX.
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Figure 7-58 IP-PBX network diagram
The EGW1520 allocates numbers to POTS and SIP users. Each number is unique.
The EGW1520 can accept SIP users' registration. When receiving a registration request from
a SIP user, the EGW1520 authenticates the SIP user. If the authentication is successful, the
EGW1520 sends the success notification to the SIP user. If the authentication fails, the
EGW1520 sends the failure notification to the SIP user. When the registration is successful,
EGW1520's SIP users can make or receive calls.
POTS users who are allocated numbers by the EGW1520 do not require registration. The
registration is successful after pots users allocate numbers.

The EGW1520 analyzes the called number when an intra-office user initiates a call. If
the call is an inter-office call call and the prefix of the called number matches the
outgoing call prefix range configured on the EGW1520, the call is made through an FXO
port. If the call is an intra-office call, the EGW1520 enables the user's POTS phone to
ring or sends an SIP message to the user's SIP phone or soft terminal. The EGW1520
process calls made between intra-office users.

When the EGW1520 receives a call from an outer-office user, it analyzes the called
number. If the called user connects to the EGW1520, the EGW1520 enables the called
user's POTS phone to ring or sends a SIP message to the called user's SIP phone or soft
terminal. If the called user is not connected to the EGW1520, the call fails and
EGW1520 sends a response to the calling user through the SIP server.

A maximum of 20 SIP users.

One FXS port, connecting to one POTS user.

A maximum of 8-channel users (SIP users and POTS users) can simultaneously initiate
calls. Standards supported by voice service:
Specification
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−
G.711 A, G.711 u, G.729, G.726, and G.722
−
SIP (RFC 3261–3265)
−
SIP Session Timers (RFC 4028)
−
SDP (RFC 2327)
−
RTP or RTCP
−
RFC 2833
7 Feature Description and Implementation
Limitation
For details, see Service Conflicts.
Adding Voice Users
The EGW1520 provides the IP private branch exchange (PBX) function. This function
enables internal phones (analog phones and IP phones) to connect to each other. The
EGW1520 can also serve as an agent to register users with the IP Multimedia Subsystem
(IMS) or Next Generation Network (NGN) so that users can call external parties.
Prerequisite

You have logged in to the web management system. For details, see 7.7.1 Web
Management.

The EGW1520 has connected to the uplink network. For details, see 7.2 Connection
Modes.

You have configured the LAN information on the EGW1520. For details, see
Configuration.
Example
Network Plan Example
The following assumes that the EGW1520 is connected to the IMS, as shown in Figure 7-59.
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Figure 7-59 EGW1520 network
Analog phones are connected to the PHONE ports of the EGW1520, and IP phones are
connected to the EGW1520 through the switch. You can also use network cables to connect IP
phones to LAN ports of the EGW1520.
Data Plan Example
Table 7-24 shows the user number plan.
Table 7-24 Number plan example
Phone Type/Port
Internal No
External No
Registratio
n Group
Analog phone/PHONE
7100
008675599997100
IP phone/LAN2 (through the
switch)
8100
008675599998100
IP phone/LAN2 (through the
switch)
8101
008675599998101
Parameters in Table 7-24 are described as follows:

Phone Type/Port: Analog phones use ports PHONE, and IP phones use logic ports on the
EGW1520 by using IP addresses.

Internal No: This parameter is user-defined and configured on EGW1520 for making
internal calls.

External No: The parameter value is determined by the network carrier. In this example,
the format of the calling number sent to the IMS is country code+area code+phone
number.

Registration Group: This parameter is specified by the EGW1520 administrator. The
EGW1520 registers external numbers with the IMS or NGN in groups. Each external
number must belong to a registration group. If numbers are registered with the IMS,
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multiple numbers can be in the same registration group. If numbers are registered with
the NGN, each number is in a unique registration group.
Table 7-25 lists registration information on the IMS or NGN.
Table 7-25 Registration information on the IMS or NGN
Registration
Information
Example
SIP Server

Address Type: IP

IP Domain: 192.169.10.90

Server Type: IMS

RegisterType: Group

Authentication: MD5

Password: egw

Sip Trunk ID: +8675599997100. The value is provided by the carrier.

Sip Trunk Name: +8675599997100. The value is provided by the
carrier.

IMS Domain: huawei
SIP Group
Procedure
Step 1 Configure the Session Initiation Protocol (SIP) server.
1.
On the web management system, choose Voice > SIP Server from the navigation tree.
2.
Click
The page shown in Figure 7-60 is displayed.
Figure 7-60 SIP Server tab page
UC Mode is set to Disable before the device is delivered. The synchronized user data is cleared when
the system changes from the UC mode to the common mode.
3.
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Set parameters according to Table 7-26.
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Table 7-26 Parameter description (1)
Parameter
Description
Working Mode

Master: active server. The server that is added first is the active
server.

Slave: standby server.
Recovery
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.
OptionInterval
Interval for sending the option messages to the active server. The value
ranges from 10 to 900, in seconds. The default value 60 is
recommended.
NOTE
The option messages are sent to the active server only, and therefore this
parameter is valid only for the active server.
Address Type
Address type. The options are IP and Domain.
IP/Domain
IP address or DNS domain name of the SIP server. The value is
provided by the network carrier.
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
SIP network type. The value is provided by the network carrier.
Port
Port number of the SIP server. The value is provided by the network
carrier. The default value 5060 is recommended.
Expiration Time
Time when the registration period expires. The value is negotiated by
the EGW1520 and the SIP server. The value ranges from 0 to 14400, in
seconds. The default value 360 is recommended.
4.
Click
to save the settings.
Step 2 Configure a registration group.
User numbers use a registration group to register with the IMS or NGN. After a registration group is
configured, intra-office user can make outgoing calls controlled by the softswitch.
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1.
On the web management system, choose Voice > SIP Server from the navigation tree.
2.
Click the SIP Group tab.
3.
Click
The page shown in Figure 7-61 is displayed.
Figure 7-61 SIP Group tab page
4.
Set parameters according to Table 7-27.
Table 7-27 Parameter description (2)
Parameter
Description
Register Type
Registration type. This parameter is specified by the peer SIP server.

Single: Only one user can exist in the registration group. The value
of Register Type is Single for the NGN network.

Group: Multiple users can exist in the registration group.

Wildcard: Wildcard registration group. This registration group
registers with the IMS or NGN based on certain wildcard rules,
which are provided by the network carrier.
Authentication
Authentication mode used when a registration group registers with the
IMS or NGN. The value is provided by the network carrier.
Password
The value is provided by the network carrier.
Sip Trunk ID
The value is provided by the network carrier.
Sip Trunk Name
The value is provided by the network carrier.
IMS Domain
The value is provided by the network carrier.
Expiration Time
Time when the SIP group expires. The value is negotiated by the
EGW1520 and the SIP server. The EGW1520 must be registered with
the SIP server at least once before the expiration time to ensure that
the SIP server can exchange information with the EGW1520.
5.
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Click
to save the settings.
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Step 3 Configure an analog phone.
1.
On the web management system, choose Voice > Phone Allocation.
The page shown in Figure 7-62 is displayed.
Figure 7-62 Configuring an analog phone
2.
Click
The page shown in Figure 7-63 is displayed.
Figure 7-63 Setting analog phone parameters
3.
Set parameters according to Table 7-28.
Table 7-28 Parameter description (5)
Parameter
Description
Port
Port number used by the analog phone to access the EGW1520.
Internal No
The internal number is used for the calls between intra-office
subscribers. The value is a number of 1 to 30 digits, which can be
user-defined. It cannot conflict with any service prefixes, emergency
numbers, outer-office numbers, or other intra-office numbers.
NOTE
Table 7-30 lists Ireland's and New Zealand's emergency numbers.
User Name
A string of 1-64 characters, which can be user-defined. For example,
Jack.
Registration Group
Registration group ID that is used when a POTS phone registers
with the IMS/NGN network.
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Parameter
7 Feature Description and Implementation
Description
NOTE
If the required registration group does not exist, choose Voice > SIP Server,
and click the SIP Group tab to add it.
External No
External number for outgoing and incoming calls. The value is
provided by the network carrier. This parameter is valid after you set
the Registration Group parameter. The external number cannot
conflict with any service prefixes, emergency numbers, outer-office
numbers, or other intra-office numbers.
NOTE
 Registration Group bound to External No must correspond to Sip Trunk
ID. If Sip Trunk ID starts with +, you need to change + to 00 when you
configure External No.

Digitmap
Table 7-30 lists Ireland's and New Zealand's emergency numbers.
A dialing rule, which determines whether the range and length of the
dialed number comply with the dialing rule. This parameter is valid
after you set the Registration Group parameter. The EGW1520
allows users to dial numbers that are defined in the digitmap to
make calls quickly. If the dialed number length is the same as that
defined in the digitmap, the EGW1520 stops collecting digits and
initiates the call, which reduces the connection duration. To
configure digitmaps, use either of the following methods:

Enter a single digitmap containing a maximum of 32 characters.

Enter multiple digitmaps containing a maximum of 128
characters and separate them with vertical bars (|).
The default digitmap is [XABCD*#].T|[XABCD*#][XABCD*].#.
See Table 7-31.
User State
4.
User status (read only). The options are as follows:
Click

Idle: The user is registered and idle.

Busy: The user is registered and busy.

Locked: The user is locked. For example, the user picks up the
phone and does not dial numbers within a certain period.

Idle But Failed Register to IMS/NGN: Internal numbers are
registered and idle, but external numbers failed to be registered.

Busy But Failed Register to IMS/NGN: Internal numbers are
registered and busy, but external numbers failed to be registered.
to save the settings.
Step 4 Configure IP phones.
You can use either of the following methods to add IP phones:

Add IP phones one by one

Add IP phones in batches
You are advised to add multiple IP phones in batches.
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To add IP phones one by one, proceed as follows:
1.
On the web management system, choose Voice > Phone Allocation.
2.
Click the IP Phone tab.
3.
Click
The page shown in Figure 7-64 is displayed.
Figure 7-64 Configuring an IP Phone
4.
Set parameters according to Table 7-29.
Table 7-29 Parameter description (3)
Parameter
Description
Internal No
The internal number is used for the calls between intra-office
subscribers. The value is a number of 1 to 30 digits, which can be
user-defined. It cannot conflict with any service prefixes,
emergency numbers, outer-office numbers, or other intra-office
numbers.
NOTE
Table 7-30 lists Ireland's and New Zealand's emergency numbers.
User Name
A string of 1-64 characters, which can be user-defined. For
example, Jack.
Authentication
Authentication mode used when a SIP user registers with the
EGW1520. The value must be the same as that set on the SIP
terminal.
Password
Authentication password used when a SIP user registers with the
EGW1520. The value must be the same as that set on the SIP
terminal.
Registration Group
Registration group ID that is used when an IP phone registers
with the IMS/NGN network.
NOTE
If the required registration group does not exist, choose Voice > SIP
Server, and click the SIP Group tab to add it.
External No
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External number for outgoing and incoming calls. The value is
provided by the network carrier. This parameter is valid after you
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Description
set the Registration Group parameter. The external number
cannot conflict with any service prefixes, emergency numbers,
outer-office numbers, or other intra-office numbers.
NOTE
 Registration Group bound to External No must correspond to Sip
Trunk ID. If Sip Trunk ID starts with +, you need to change + to 00
when you configure External No.

Digitmap
Table 7-30 lists Ireland's and New Zealand's emergency numbers.
A dialing rule, which determines whether the range and length of
the dialed number comply with the dialing rule. This parameter is
valid after you set the Registration Group parameter. The
EGW1520 allows users to dial numbers that are defined in the
digitmap to make calls quickly. If the dialed number length is the
same as that defined in the digitmap, the EGW1520 stops
collecting digits and initiates the call, which reduces the
connection duration. To configure digitmaps, use either of the
following methods:

Enter a single digitmap containing a maximum of 32
characters.

Enter multiple digitmaps containing a maximum of 128
characters and separate them with vertical bars (|).
The default digitmap is
[XABCD*#].T|[XABCD*#][XABCD*].#.
Table 7-31 lists digitmap rules.
User State
IP Address
User status. The options are as follows:

Fault: The user failed to be registered.

Idle: The user is registered and idle.

Busy: The user is registered and busy.

Locked: The user is locked. For example, the user picks up the
phone and does not dial numbers within a certain period.

Idle But Failed Register to IMS/NGN: Internal numbers are
registered and idle, but external numbers failed to be
registered.

Busy But Failed Register to IMS/NGN: Internal numbers are
registered and busy, but external numbers failed to be
registered.
IP address of the IP phone on the LAN.
Table 7-30 Emergency numbers in different countries
Country
Emergency Call Numbers
China
110, 119
Ireland
999, 112
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Country
Emergency Call Numbers
New Zealand
111
Table 7-31 Digitmap rules
Parameter
Description
0-9, *, #, A, B, C, D
Characters that can be dialed.
The parameter can be any number from 0 to 9.
. (dot)
The parameter can be any value.
Dialing timeout. For example, X.T indicates that the IAD
considers that the dialing ends when the dialing times out after
the user dials some digits.
[]
Subset of the matching characters. For example, [1-357-9]
indicates any number among 1, 2, 3, 5, 7, 8, and 9.
X.T
If the user stops dialing digits and the dialing times out, the
EGW1520 considers that the dialing ends.
X.#
The EGW1520 considers that the dialing ends when the user
presses the pound key (#).
5.
Click
to save the settings.
To change the configuration of a saved IP phone, select the IP phone and reset it.
To add IP phones in batches, proceed as follows:
1.
On the web management system, choose Voice > Phone Allocation.
2.
Click the IP Phone tab.
3.
Click
The page shown in Figure 7-65 is displayed.
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Figure 7-65 Adding IP phones in batches
4.
Set parameters according to Table 7-32.
Table 7-32 Parameter description (4)
Parameter
Description
Internal No
The internal number is used for the calls between intra-office
subscribers. The value is a number of 1 to 30 digits, which
can be user-defined. It cannot conflict with any service
prefixes, emergency numbers, outer-office numbers, or other
intra-office numbers.
NOTE
Table 7-30 lists Ireland's and New Zealand's emergency numbers.
Increment
Number increasing step.
Amount
Count of numbers. A maximum of 20 numbers can be
configured.
5.
Click
6.
Set parameters according to Table 7-29.
7.
Click
to save the settings.
Step 5 Register the IP phones with the EGW1520.
Set IP addresses and internal numbers of the IP phones, and IP address of the SIP server
(EGW1520) to register the IP phones with the EGW1520. For details, see related IP phone
manuals.
IP phones support signaling encryption but cannot be set to the forced encryption mode. The forced
encryption mode will affect the communication.
----End
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Verification

Verify internal numbers.
Use the analog phone and IP phone to call each other by dialing internal numbers.

Verify external numbers.
−
Use an analog or IP phone and a mobile phone to call each other on the EGW1520.
−
Use the analog phone and IP phone to call each other by dialing external numbers on
the EGW1520.
Enabling Voice Services
A user can configure and use voice services only after the voice services are enabled.
Context
By default, the call hold, call transfer, Call Forwarding Unconditional (CFU), Call
Forwarding on Busy (CFB), Call Forwarding on No Reply (CFNR), and Calling Line Identity
Presentation (CLIP), Do not Disturb (DND), and call waiting services are enabled.
Procedure
Step 1 On the web management system, choose Voice > Service Manager from the navigation tree.
The page shown in Figure 7-66 is displayed.
Figure 7-66 Service Rights tab page (1)
Step 2 Click
The page shown in Figure 7-67 is displayed.
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Figure 7-67 Selecting a user
Step 3 Select a user number.
Step 4 Click
The page shown in Figure 7-68 is displayed.
Figure 7-68 Service Rights tab page (2)
Step 5 Select the services that you want to enable.
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Step 6 Click
7 Feature Description and Implementation
----End
Configuring and Using Voice Services
This topic describes how to use and configure voice services that are provided by the
EGW1520.
?.1.Service Conflicts
The EGW1520 supports multiple voice services which may conflict with each other. This
topic describes the conflicts between services.
Figure 7-69 shows the conflicts between services.
Figure 7-69 Service conflicts
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
Glossary shows complete service names.

You cannot set conflicting services at the same time on the web management system.
?.2.Call Hold
If a user configures the call holding service, the user can suspend a call and resume it as
required. The call holding duration is not limited.
Configuring the Service
After enabling the call holding service, users can directly use it without configuration.
Using the Service
Assume that user A is an EGW1520's voice user. During a call with user B, user A can:
1.
Press Hold or the hook flash button (for example, the R/Recall key) to suspend the call.
User B hears the music-on-hold.
2.
Press Hold or the hook flash button (for example, the R/Recall key) to resume the call.
The operations may differ on IP phones of different models. For details, see the related IP
phone user guide.
?.3.Call Transfer
The call transfer service allows a user to quit a call in progress and transfer it to a third party.
Configuring the Service
After enabling the call transfer service, users can directly use it without configuration.
Using the Service
Assume that user A, an EGW1520 voice user who has enabled the call transfer service, is in a
call with user B.
User A wants to transfer the call to user C.

When using an analog phone, user A can:
1.
Press the hook flash button and dial user C's number after hearing a dialing tone.
User B hears a waiting tone.
2.
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Select an operation from the following:
−
Hang up the phone directly.
−
If user C is connected, user C's phone rings and user B hears the Ring Back Tone
(RBT). After picking up the phone, user C talks with user B.
−
If user C cannot be connected, user B hears a busy tone.
−
Hang up the phone after user C is connected.
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User C's phone rings and user B hears the RBT. After picking up the phone, user C
talks with user B.
−
Hang up the phone after user C answers the call.
User B talks with user C.
−
Talk with user B again.
If user C is busy or does not respond, user A can press the hook flash button or wait
20 seconds to talk with user B again.

When using an IP phone, user A can use one of the following modes:
−
1.
2.
Unattend mode
User A presses the transfer key, dials the user C's number, and presses the send key.
−
User A's phone hangs up automatically, user B hears the RBT, and user C's phone
rings. The process goes to step 2.
−
If user C is disconnected, the conversation between user A and user B resumes.
User C picks up the phone and talks with user B.
−
Attend mode
In this mode, user A must use a SIP phone that supports multiple lines, for example, Polycom.
1.
User A presses another idle line key (the indicator is off), for example, line 2.
The conversation between user A and user B is held, and user B hears a waiting tone.
2.
3.
User A dials the user C's number and presses the send key.
−
User A hears the RBT and user C's phone rings. The process goes to step 3.
−
If user C is busy, user A hears a busy tone. After pressing the line key that connects to
user B (line 1), user A resumes the conversation with user B.
User C picks up the phone and talks with user B.
The conversation between user A and user C occupies another line (line 2 in the
preceding example).
4.
User A presses the transfer key, dials the user C's number, and presses the send key.
User A's phone hangs up automatically, and user B talks with user C.
−
Semi-attend mode
In this mode, user A must use a SIP phone that supports multiple lines, for example, Polycom.
The procedure for user A to transfer a call in semi-attend mode is similar to that of
attend mode. The only difference lies in that step 4 does not exist. In semi-attend
mode, when user A hears the RBT (indicating that user C is connected), the call is
transferred to user C.
?.4.Call Forwarding Unconditional
After a user enables and configures the Call Forwarding Unconditional (CFU) service, all
calls to the user will be forwarded to a preset number.
Precautions
The CFU service conflicts with some other services. For details, see Service Conflicts.
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Configuring the Service
Web mode
Before configuring a service, ensure that the service has been enabled. For details on how to
enable voice services, see Enabling Voice Services. By default, the CFU service is enabled.
Step 1 On the web management system, choose Voice > Service Manager from the navigation tree.
Step 2 Click the Service Configuration tab.
The page shown in Figure 7-70 is displayed.
Figure 7-70 Configure Service tab page (1)
Step 3 Click
The page shown in Figure 7-71 is displayed.
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Figure 7-71 Selecting a user
Step 4 Select a user number, and click
The procedure varies according to whether you have configured any forwarding services
before.

Without forwarding services before

With forwarding services before
If you have not configured any forwarding services before, the page shown in Figure 7-72 is
displayed after you click
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Figure 7-72 Without forwarding services before (1)
The procedure is as follows:
1.
Click Apply.
The page shown in Figure 7-73 is displayed.
Figure 7-73 Without forwarding services before (2)
2.
Select CFU and enter the forwarded-to number.
3.
Click
Figure 7-74 shows the configuration result.
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Figure 7-74 Configuration result
To modify service configurations, click Configure corresponding to the service.
If you have configured forwarding services before, the page shown in Figure 7-75 is
displayed .
Figure 7-75 With forwarding services before (1)
The procedure is as follows:
1.
Click Configure.
The page shown in Figure 7-76 is displayed.
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Figure 7-76 With forwarding services before (2)
2.
Select CFU and enter the forwarded-to number.
3.
Click
Figure 7-77 shows the configuration result.
Figure 7-77 Configuration result
To modify service configurations, click Configure corresponding to the service.
----End
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Service prefix dialing mode
In addition to the preceding web mode, you can also dial a prefix to configure the service. For
example, pick up the phone and dial default service prefix *21*number#. The number is
forwarded number. To change the service prefix, see Changing Service Prefixes.
Using the Service

A call can be forwarded only twice consecutively.
For example, user A can forward a call to user B and user B can forward the call to user C.
User C, however, cannot forward the call to others.

A call cannot be forwarded in a loop.
For example, user A can forward a call to user B but user B cannot forward the call to user A.
If user A has enabled and configured the CFU service, user A's calls are forwarded to the
preset number.
Canceling the Service
Web mode
Click Cancel on the Service Configuration tab page, as shown in Figure 7-78.
Figure 7-78 Canceling the service
Service prefix dialing mode
A user picks up the phone and dials default service prefix #21#. To change the service prefix,
see Changing Service Prefixes.
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?.5.Call Forwarding on Busy
If a user configures the call forwarding on busy (CFB) service and is busy, all incoming calls
are forwarded to a preset number.
Precautions

A call can be forwarded only twice consecutively. For example, user A can forward a call
to user B and user B can forward the call to user C. User C, however, cannot forward the
call to others.

A call cannot be forwarded in a loop. For example, user A can forward a call to user B
but user B cannot forward the call to user A.

The CFB service conflicts with some other services. For details, see Service Conflicts.
Configuring the Service
Web mode
Before configuring a service, ensure that the service has been enabled. For details on how to
enable voice services, see Enabling Voice Services. By default, the CFB service is enabled.
Step 1 On the web management system, choose Voice > Service Manager from the navigation tree.
Step 2 Click the Service Configuration tab.
The page shown in Figure 7-79 is displayed.
Figure 7-79 Configure Service tab page
Step 3 Click
The page shown in Figure 7-80 is displayed.
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Figure 7-80 Selecting a user
Step 4 Select a user number, and click
The procedure varies according to whether you have configured any forwarding services
before.

Without forwarding services before

With forwarding services before
If you have not configured any forwarding services before, the page shown in Figure 7-81 is
displayed after you click
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Figure 7-81 Without forwarding services before (1)
The procedure is as follows:
1.
Click Apply.
The page shown in Figure 7-82 is displayed.
Figure 7-82 Without forwarding services before (2)
2.
Select CFB and enter the forwarded-to number.
3.
Click
Figure 7-83 shows the configuration result.
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Figure 7-83 Configuration result
To modify service configurations, click Configure corresponding to the service.
If you have configured forwarding services before, the page shown in Figure 7-84 is displayed
after you click
Figure 7-84 With forwarding services before (1)
The procedure is as follows:
1.
Click Configure.
The page shown in Figure 7-85 is displayed.
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Figure 7-85 With forwarding services before (2)
2.
Select CFB and enter the forwarded-to number.
3.
Click
Figure 7-86 shows the configuration result.
Figure 7-86 Configuration result
To modify service configurations, click Configure corresponding to the service.
----End
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Service prefix dialing mode
A user picks up the phone and dials *67*number#, where number is the forwarded-to number
and *67* is the default service prefix. To change the service prefix, see Changing Service
Prefixes.
Using the Service
Assume that user A has the CFB service right and configures the CFB service (forward calls
to user C). If user A is busy, the call is forwarded to user C.
Canceling the Service
Web mode
Click Cancel on the Service Configuration tab page, as shown in Figure 7-87.
Figure 7-87 Canceling the service
Service prefix dialing mode
A user picks up the phone and dials default service prefix #67#. To change the service prefix,
see Changing Service Prefixes.
?.6.Call Forwarding on No Reply
If a user configures the call forwarding on no reply (CFNR) service and does not answer a call
for a specified period (20s by default), the call is automatically forwarded to a preset number.
Precautions

A call can be forwarded only twice consecutively. For example, user A can forward a call
to user B and user B can forward the call to user C. User C, however, cannot forward the
call to others.

A call cannot be forwarded in a loop. For example, user A can forward a call to user B
but user B cannot forward the call to user A.
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
7 Feature Description and Implementation
The CFNR service conflicts with some other services. For details, see Service Conflicts.
Configuring the Service
Web mode
Before configuring a service, ensure that the service has been enabled. For details on how to
enable voice services, see Enabling Voice Services.
Step 1 On the web management system, choose Voice > Service Manager from the navigation tree.
Step 2 Click the Service Configuration tab.
The page shown in Figure 7-88 is displayed.
Figure 7-88 Configure Service tab page
Step 3 Click
The page shown in Figure 7-89 is displayed.
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Figure 7-89 Selecting a user
Step 4 Select a user number.
Step 5 Click
The procedure varies according to whether you have configured any forwarding services
before.

Without forwarding services before

With forwarding services before
If you have not configured any forwarding services before, the page shown in Figure 7-90 is
displayed after you click
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Figure 7-90 Without forwarding services before (1)
The procedure is as follows:
1.
Click Apply.
The page shown in Figure 7-91 is displayed.
Figure 7-91 Without forwarding services before (2)
2.
Select CFNR, and enter the forwarded-to number and waiting duration before
forwarding (unit: second).
3.
Click
Figure 7-92 shows the configuration result.
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Figure 7-92 Configuration result
To modify service configurations, click Configure corresponding to the service.
If you have configured forwarding services before, the page shown in Figure 7-93 is displayed
after you click
Figure 7-93 With forwarding services before (1)
The procedure is as follows:
1.
Click Configure.
The page shown in Figure 7-94 is displayed.
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Figure 7-94 With forwarding services before (2)
2.
Select CFNR, and enter the forwarded-to number and waiting duration before
forwarding.
3.
Click
Figure 7-95 shows the configuration result.
Figure 7-95 Configuration result
To modify service configurations, click Configure corresponding to the service.
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----End
Service prefix dialing mode
A user picks up the phone and dials *61*number*time#, where number is the forwarded-to
number, time is set as waiting duration, and *61* is the default service prefix. To change the
service prefix, see Changing Service Prefixes.
Using the Service
Assume that user A has enabled and configured the CFNR service (forward calls to user C). If
user A does not answer a call, the call is forwarded to user C.
Canceling the Service
Web mode
Click Cancel on the Service Configuration tab page, as shown in Figure 7-96.
Figure 7-96 Canceling the service
Service prefix dialing mode
A user picks up the phone and dials default service prefix #61#. To change the service prefix,
see Changing Service Prefixes.
?.7.Calling Line Identity Presentation
If a user configures the calling line identity presentation (CLIP) service, the calling number is
displayed on the user's phone when a call is received.
Precautions
The CLIP service conflicts with some other services. For details, see Service Conflicts.
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Configuring the Service
After enabling the CLIP service, users can directly use it without configuration.
Using the Service
Assume that user A has the CLIP service right. When user B calls user A, user B's number is
displayed on user A's phone.
If user B has enabled the calling line identity restriction (CLIR) service, user B's number will
not be displayed on user A's phone.
?.8.Calling Line Identity Restriction
If a calling user configures the calling line identity restriction (CLIR) service, the calling
number is not displayed on the called user's phone even if the called user has enabled the
CLIP service.
Precautions
The CLIR service conflicts with some other services. For details, see Service Conflicts.
Configuring the Service
Before configuring a service, ensure that the service has been enabled. For details on how to
enable voice services, see Enabling Voice Services.
Step 1 On the web management system, choose Voice > Service Manager from the navigation tree.
Step 2 Click the Service Configuration tab.
The page shown in Figure 7-97 is displayed.
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Figure 7-97 Configure Service tab page (1)
Step 3 Click
The page shown in Figure 7-98 is displayed.
Figure 7-98 Selecting a user
Step 4 Select a user number, and click
The page shown in Figure 7-99 is displayed.
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Figure 7-99 Configure Service tab page (2)
Step 5 Click Apply.
Figure 7-100 shows the configuration result.
Figure 7-100 Configuration result
----End
Using the Service
If user A has the CLIR service right, the called user's phone does not display user A's number
when user A calls the user.
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Canceling the Service
Click Cancel on the Service Configuration tab page, as shown in Figure 7-101.
Figure 7-101 Canceling the service
?.9.Connected Line Identification Presentation
If a user configures the Connected Line Identification Presentation (COLP) service and
receives a call, the user's phone displays the called number or forwarded-to number.
Precautions
The COLP service conflicts with some other services. For details, see Service Conflicts.
Configuring the Service
After enabling the COLP service, users can directly use it without configuration. For details
on how to enable voice services, see Enabling Voice Services.
Using the Service
Assume that user A has the COLP service right and user B has enabled the call forwarding
service (forward to user C). When user A calls user B, the call is forwarded to user C and user
A's phone displays user C's number.
Only the specified phone models support the COLP service, such as Polycom and Snom.
?.10.Connected Line Identity Restriction
If a user configures the Connected Line Identification Restriction (COLR) service and
receives a call, the user's number is not displayed on the calling user's phone.
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Precautions
The COLR service conflicts with some other services. For details, see Service Conflicts.
Configuring the Service
After enabling the COLR service, users can directly use it without configuration. For details
on how to enable voice services, see Enabling Voice Services.
Using the Service
Assume that user B has enabled the call forwarding service (forward to user C) and user C has
the COLR service right. When user A calls user B, user A's phone does not display user C's
number even if user A has enabled the COLP service.
If the COLR service is set by the called user, the calling user's phone model is specified, such
as Polycom and Snom.
?.11.Call Completion on Busy Subscriber
If user A configures the call completion on busy subscriber (CCBS) service and user B calls
user A but user A is busy, user B can select callback upon busy as prompted. Then the
EGW1520 calls user A when user A is idle. After user A picks up the phone, the EGW1520
calls user B. Then user B picks up the phone and talks with user A.
Precautions
The CCBS service conflicts with some other services. For details, see Service Conflicts.
Configuring the Service
Web mode
Before configuring a service, ensure that the service has been enabled. For details on how to
enable voice services, see Enabling Voice Services.
Step 1 On the web management system, choose Voice > Service Manager from the navigation tree.
Step 2 Click the Service Configuration tab.
The page shown in Figure 7-102 is displayed.
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Figure 7-102 Configure Service tab page (1)
Step 3 Click
The page shown in Figure 7-103 is displayed.
Figure 7-103 Selecting a user
Step 4 Select a user number, and click
The page shown in Figure 7-104 is displayed.
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Figure 7-104 Configure Service tab page (2)
Step 5 Click Apply.
The page shown in Figure 7-105 is displayed.
Figure 7-105 Configure Service tab page (3)
Step 6 Click
service.
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If you do not set a user number or user number prefix, all calling users can trigger the CCBS
service. If you set it, only users with the preset user number or user number prefix can trigger
the CCBS service.
Step 7 Click
Figure 7-106 shows the configuration result.
Figure 7-106 Configuration result
----End
Service prefix dialing mode
A user picks up the phone and dials service prefix *37#, where *37# is the default service
prefix. To change the service prefix, see Changing Service Prefixes.
Using the Service
Assume that user A has enabled and configured the CCBS service.
If user A configures the CCBS service and user B calls user A but user A is busy, user B can
select callback upon busy as prompted. Then the EGW1520 calls user A when user A is idle.
After user A picks up the phone, the EGW1520 calls user B. Then user B picks up the phone
and talks with user A.
Canceling the Service
Web mode
Click Cancel on the Service Configuration tab page, as shown in Figure 7-107.
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Figure 7-107 Canceling the service
Service prefix dialing mode
A user picks up the phone and dials default service prefix #37#. To change the service prefix,
see Changing Service Prefixes.
?.12.Do Not Disturb
After a user enables the Do Not Disturb (DND) service, the EGW1520 will block all
incoming calls to the user.
If a user uses an IP phone and enables the DND function on the IP phone, the user will not
receive any calls even if the DND service is not enabled on the EGW1520. For details on how
to enable the DND function on an IP phone, see the IP phone user guide.
Precautions
The DND service conflicts with some other services. For details, see Service Conflicts.
Configuring the Service
Web mode
Before configuring a service, ensure that the service has been enabled. For details on how to
enable voice services, see Enabling Voice Services. By default, the DND service is enabled.
Step 1 On the web management system, choose Voice > Service Manager from the navigation tree.
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Step 2 Click the Service Configuration tab.
The page shown in Figure 7-108 is displayed.
Figure 7-108 Configure Service tab page (1)
Step 3 Click
The page shown in Figure 7-109 is displayed.
Figure 7-109 Selecting a user
Step 4 Select a user number.
Step 5 Click
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The page shown in Figure 7-110 is displayed.
Figure 7-110 Configure Service tab page (2)
Step 6 Click Apply.
Figure 7-111 shows the configuration result.
Figure 7-111 Configuration result
----End
Service prefix dialing mode
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In addition to the preceding web mode, you can also dial a prefix to configure the service. For
example, pick up the phone and dial default service prefix *56#. To change the service prefix,
see Changing Service Prefixes.
Using the Service
Assume that user A has enabled and configured the DND service. When other users call user
A, they will hear the DND announcement but user A can still make calls.
Canceling the Service
Web mode
Click Cancel on the Service Configuration tab page, as shown in Figure 7-112.
Figure 7-112 Canceling the service
Service prefix dialing mode
Pick up the phone and dial the default service prefix #56#. To change the service prefix, see
Viewing and Changing Service Prefixes.
?.13.Call Waiting
When a user that uses the call waiting service in a conversation receives a new call, the user
can follow the phone prompt to suspend or end the original call within 15 seconds to answer
the new called user.
Precautions
The call waiting service conflicts with some other services. For details, see Service Conflicts.
Configuring the Service
Web mode
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Before configuring a service, ensure that the service has been enabled. For details on how to
enable voice services, see Enabling Voice Services. By default, the call waiting service is
enabled.
Step 1 On the web management system, choose Voice > Service Manager from the navigation tree.
Step 2 Click the Service Configuration tab.
The page shown in Figure 7-113 is displayed.
Figure 7-113 Configure Service tab page (1)
Step 3 Click
The page shown in Figure 7-114 is displayed.
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Figure 7-114 Selecting a user
Step 4 Select a user number.
Step 5 Click
The page shown in Figure 7-115 is displayed.
Figure 7-115 Configure Service tab page (2)
Step 6 Click Apply.
Figure 7-116 shows the configuration result.
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Figure 7-116 Configuration result
----End
Service prefix dialing mode
In addition to the preceding web mode, you can also dial a prefix to configure the service. For
example, pick up the phone and dial default service prefix *43#. To change the service prefix,
see Changing Service Prefixes.
Using the Service
Assume that user A is talking with user B. User C calls user A and user A listens to a prompt
tone which indicates that a new call is received. The process of using the service varies
according to the phone that user A uses.
The call waiting service is unavailable if user A is using the night service.

When using an analog phone, user A can:
−
Press the hook flash button to suspend the call with user B for a while. Press 2 after
hearing a dial tone to talk with user C.
−
Press the hook flash button to end the call with user B. Press 1 to talk with user C.
−
Reject user C's call.
−
Method 1: Continue the conversation with user B. The prompt tone automatically
disappears after 15 seconds and user C hears a busy tone.
−
Method 2: Press the hook flash button and press 0.

When using an IP phone, user A can:
1.
The indicator corresponding to another line on the IP phone turns on.
2.
To talk with user C, user A presses the key representing user C's call.
During the call with user C, if user A presses the key representing user B's call, the call
with user B resumes and the call with user C is held.
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Canceling the Service
Web mode
Click Cancel on the Service Configuration tab page, as shown in Figure 7-117.
Figure 7-117 Canceling the service
Service prefix dialing mode
Pick up the phone and dial the default service prefix #43#. To change the service prefix, see
Viewing and Changing Service Prefixes.
?.14.Malicious Caller Identification
After acknowledging a malicious call, a user can press the hook flash button and dial an
access code to record the calling user information to the system for subsequent query and
download.
Precautions

The EGW1520 supports a maximum of 512 malicious call records.

A user can save a maximum of 25 malicious call records.
Configuring the Service
After enabling the Malicious Caller Identification (MCID) service, users can directly use it
without configuration. For details on how to enable voice services, see Enabling Voice
Services.
Using the Service
Record a malicious call.
Assume that user A has the right to use the MCID service. To record a malicious call from
user B, proceed as follows:
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