SENA TECHNOLOGIES LS100W Wireless serial device server (AP) User Manual
Sena Technologies,Inc. Wireless serial device server (AP)
Users Manual
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FCC RF Radiation Exposure Statement
The antenna used for this transmitter must be installed to provide a separation
distance of least 20 cm for all persons and must not be co-located or operating in
conjunction with any other antenna or transmitter.
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HelloDevice
LS100W
User Guide
Version 1.2.0
2005-07-20
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User Guide for the HelloDevice LS100W
Version 1.2.0
Firmware version 1.2.X
Last revised on May 21, 2004
Printed in Korea
Copyright
Copyright 2002, Sena Technologies, Inc. All rights reserved.
Sena Technologies reserves the right to make changes and improvements to its product without
providing notice.
Trademark
HelloDevice™ is a trademark of Sena Technologies, Inc.
Windows® is a registered trademark of Microsoft Corporation.
Ethernet® is a registered trademark of XEROX Corporation.
Notice to Users
When a system failure may cause serious consequences, protecting life and property against such
consequences with a backup system or safety device is essential. The user agrees that protection
against consequences resulting from system failure is the user's responsibility.
This device is not approved for life-support or medical systems.
Changes or modifications to this device not explicitly approved by Sena Technologies will void the
user's authority to operate this device.
Technical Support
Sena Technologies, Inc.
210 Yangjae-dong, Seocho-gu
Seoul 137-130, Korea
Tel: (+82-2) 573-5422
Fax: (+82-2) 573-7710
E-Mail: support@sena.com
Website: http://www.sena.com
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Table of Contents
1: Introduction 6
1.1 Overview .....................................................................................................................................6
1.2 Package Check List.....................................................................................................................7
1.3 Product Specification...................................................................................................................8
1.4 Terminologies and Acronyms ......................................................................................................9
2: Getting Started 11
2.1 Panel
Layout……………………………………………………………………………………………11
2.2 Connecting the
Hardware…………………………………………………………………………….13
2.2.1 Connecting the Power………………………………………………………………………...13
2.2.2 Connecting to the Wireless LAN …………………………………………………………….13
2.2.3 Connecting to the Device……………………………………………………………………..14
2.3. Accessing Console Port ...........................................................................................................14
2.3.1 Using Serial Console ......................................................................................................15
2.3.2 Using Remote Console...................................................................................................16
2.4 Command Usage ......................................................................................................................17
2.4.1 ‘set’ Command................................................................................................................18
2.4.2 ‘get’ Command................................................................................................................19
2.4.3 ‘help’ Command ..............................................................................................................21
2.4.4 ‘factorydefault’ Command ...............................................................................................22
2.4.5 ‘save’ Command .............................................................................................................22
2.4.6 ‘exit’ Command ...............................................................................................................22
2.4.7 ‘reboot’ Command...........................................................................................................23
3: Wireless LAN Configuration 24
3.1 Overview ...................................................................................................................................24
3.1.1 Infrastructure Mode and Ad-hoc Mode ...........................................................................24
3.1.2 Network Name: SSID (Service Set Identifier).................................................................24
3.1.3 Channel...........................................................................................................................24
3.1.4 Security ...........................................................................................................................25
3.2 Setting .......................................................................................................................................25
4: IP Address Configuration 27
4.1 Static IP .....................................................................................................................................28
4.1.1 Overview .........................................................................................................................28
4.1.2 Static IP Configuration………………………………………………………………………...28
4.2 DHCP ........................................................................................................................................29
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4.2.1 Overview .........................................................................................................................29
4.2.2 DHCP Configuration…………………………………………………………………………..30
5. Host Mode Configuration 31
5.1 TCP Server Mode Operations...................................................................................................33
5.1.1 Overview .........................................................................................................................33
5.1.2 TCP Server Mode Configuration.....................................................................................34
5.2 TCP Client Mode Operations ....................................................................................................35
5.2.1 Overview .........................................................................................................................36
5.2.2 TCP Client Mode Configuration ......................................................................................37
5.3 TCP Server/Client Mode Operations.........................................................................................38
5.3.1 Overview .........................................................................................................................38
5.3.2 TCP Server/Client Mode Configuration...........................................................................39
6: Serial Port Configuration 41
7: System Administration 44
Appendix A: Connections 45
A.1 Serial Port Pin Outs ..................................................................................................................45
A.2 Serial Wiring Diagram...............................................................................................................45
Appendix B: Well-known Port Numbers 46
Appendix C: Troubleshooting 47
C.1 Power/LED Status Troubleshooting..........................................................................................47
C.2 Serial Console Troubleshooting................................................................................................47
C.3 Remote Console Troubleshooting ............................................................................................47
C.4 IP Address Troubleshooting......................................................................................................48
C.5 DHCP Troubleshooting.............................................................................................................48
C.6 TCP Server Mode Operation Troubleshooting .........................................................................48
C.7 Serial Communication Troubleshooting....................................................................................49
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1: Introduction
1.1 Overview
The HelloDevice LS100W allows you to Wireless-enable a variety of serial devices that were not
originally designed to be networked. This capability brings the advantages of remote management and
data accessibility to thousands of serial devices over the wireless network.
The LS100W is a most cost effective one port serial wireless LAN communication device. The
LS100W supports RS232 serial communication allowing virtually any asynchronous serial device to be
accessed over wireless network.
As for the Internet connectivity, the LS100W supports open network protocols such as TCP/IP
allowing serial devices to be accessed over 802.11b wireless LAN environment.
The LS100W provides the management console using Telnet and serial console port under the
password protection support. And the LS100W also provides the management function using the
HelloDevice Manager Software Utility.
The LS100W was designed to accommodate the unique requirements of the Retail POS, Security,
Automation and Medical marketplaces.
Parts of this manual assume the knowledge on concepts of the Internetworking protocols and serial
communications. If you are not familiar with these concepts, please refer to the standards or the
documentation on each subject.
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1.2 Package Check List
- LS100W external box
- AC 120V Power supply adapter
- Serial console/data cable
- A hardcopy of Quick Start Guide
- CD-ROM including the COM port redirector and the HelloDevice Manager and User Guide
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1.3 Product Specification
One male DB9 serial port for data communication/serial console
Serial speeds 1200bps to 115200bps
Flow Control: None, Hardware RTS/CTS
Serial Interface
Signals: Rx, Tx, RTS, CTS, DTR, DSR, GND
IEEE802.11b Wireless LAN 11Mbps
Network Interfaces Supports static and dynamic IP address
Protocols ARP, IP/ICMP, TCP, Telnet, DHCP client, WEP
Security User ID & Password, SSID, 64/128-bit WEP key
Telnet or serial console port or HelloDevice Manager
Management Full-featured system status display
Diagnostic LED Power
Ready
Link
Act
Serial Rx/Tx
Supply voltage
9V ~ 30V DC
Power
Supply current
300mA@9VDC
Environmental Operating temperature: 0 ~ 55 oC
Storage temperature: -4 ~ 66 oC
Dimension
100 mm L (3.9 in.)
72 mm W (2.8 in.)
29 mm H (1 in.)
Physical
properties
Weight
300g
Approvals FCC(A), CE(A), MIC
Warranty 5-year limited warranty
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1.4 Terminologies and Acronyms
The Internetworking related terminologies used frequently in this manual are defined clearly to help
your better understanding of the LS100W.
MAC address
On a local area network or other network, the MAC (Media Access Control) address is the computer's
unique hardware number. (On an Ethernet LAN, it's the same as your Ethernet address.)
It is a unique 12-digit hardware number, which is composed of 6-digit OUI (Organization Unique
Identifier) number and 6-digit hardware identifier number. The LS100W has the MAC address of 00-
0B-6B-xx-xx-xx, which is labeled on the bottom side of the external box.
Host
A user’s computer connected to the network
In Internet protocol specifications, the term "host" means any computer that has full two-way access to
other computers on the Internet. A host has a specific "local or host number" that, together with the
network number, forms its unique IP address.
Session
A series of interactions between two communication end points that occur during the span of a single
connection
Typically, one end point requests a connection with another specified end point and if that end point
replies agreeing to the connection, the end points take turns exchanging commands and data ("talking
to each other"). The session begins when the connection is established at both ends and terminates
when the connection is ended.
Client/Server
Client/server describes the relationship between two computer programs in which one program, the
client, makes a service request from another program, the server, which fulfills the request.
A server is a computer program that provides services to other computer programs in the same or
other computers, whereas a client is the requesting program or user in a client/server relationship. For
example, the user of a Web browser is effectively making client requests for pages from servers all
over the Web. The browser itself is a client in its relationship with the computer that is getting and
returning the requested HTML file. The computer handling the request and sending back the HTML file
is a server.
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Table 1-1 Acronym Table
ISP Internet Service Provider
PC Personal Computer
NIC Network Interface Card
MAC Media Access Control
LAN Local Area Network
UTP Unshielded Twisted Pair
ADSL Asymmetric Digital Subscriber Line
ARP Address Resolution Protocol
IP Internet Protocol
ICMP Internet Control Message Protocol
UDP User Datagram Protocol
TCP Transmission Control Protocol
DHCP Dynamic Host Configuration Protocol
SMTP Simple Mail Transfer Protocol
FTP File Transfer Protocol
PPP Point-To-Point Protocol
HTTP HyperText Transfer Protocol
DNS Domain Name Service
SNMP Simple Network Management Protocol
UART Universal Asynchronous Receiver/Transmitter
Bps Bits per second (baud rate)
DCE Data Communications Equipment
DTE Data Terminal Equipment
CTS Clear to Send
DSR Data Set Ready
DTR Data Terminal Ready
RTS Request To Send
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2: Getting Started
This chapter describes how to set up and configure the LS100W in the first place.
- 2.1 Panel Layout explains the panel layout and LED indicators.
- 2.2 Connecting the Hardware describes how to connect the power, the network, and the serial
device to the LS100W.
- 2.3 Accessing Console Port describes how to access the console port using a serial console at a
local site or telnet console at a remote site.
- 2.4 Command Usages described how to use command set of the LS100W to configure and view
parameter values and status.
Following items are pre-required to get started.
- One DC power adapter (included in the package).
- One serial console cable for configuration (included in the package).
- One RS-232 serial cable for connecting the RS-232 serial device.
- One PC with Network Interface Card (hereafter, NIC) and/or one RS232 serial port.
- Terminal emulation program running on the PC
2.1 Panel Layout
The LS100W has 5 LED indicator lamps for status display. The top two lamps indicate the status of
system power and operation readiness. The next lamp down indicates the receive and transmit status
of the serial port for data communication. The final two lamps indicate the IEEE802.11b Wireless LAN
connection and its activity, respectively. Table 2-1 describes the function of each LED indicator lamp.
Table 2-1. LED Indicator Lamps on the LS100W
Lamps Functions
Power Solid RED when power is supplied
Status
Ready Solid GREEN when system is running
Serial Ports Serial Rx/Tx Blinking when there is any incoming or outgoing data stream through the
serial port of the LS100W
Link Solid ORANGE when connected to Wireless LAN Network
Wireless LAN
Act Blinking when there is any activity such as incoming or outgoing packets
through the LS100W Wireless LAN port.
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Figure 2-1. The panel layout of the LS100W
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2.2 Connecting the Hardware
This section describes how to connect the LS100W to the serial device for initial testing.
- Connect a power source to the LS100W.
- Connect the LS100W to a serial device through serial data cable.
2.2.1 Connecting the Power
Connect the power jack to the LS100W power plug using the DC power adapter included in the
package. If power is supplied properly, the [Power] LED lamp on the LS100W front panel will remain
solid red.
Figure 2-2. Connecting the Power to the LS100W
2.2.2 Connecting to the Wireless LAN
There is built-in 802.11b Wireless LAN module in the LS100W. When power is connected correctly,
the module will automatically search for the Wireless LAN access point, and then try to connect to the
LAN access point. If the Wireless LAN cable is properly connected to the Wireless LAN access points,
the LS100W will have a valid connection to the Wireless LAN network and indicates that valid
connection with the following indications:
- The [Link] LED lamp on the LS100W front panel remains solid orange.
- The [Act] LED lamp on the LS100W front panel continuously blinks to indicate the transfer of the
incoming and outgoing Wireless LAN packets.
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For users to connect the LS100W to a Wireless LAN access point in their environment, they must first
set the corresponding information on the LS100W, such as the SSID of the Wireless LAN access point.
Please refer to the Wireless LAN Settings section in Chapter 3 for the various parameters needing to
be set for Wireless LAN connection.
2.2.3 Connecting to the Device
Connect the serial data cable to the LS100W and the serial device as shown below. Ensure that
power has been correctly supplied to both the serial device and the LS100W.
Figure 2-3. Connecting a Serial Device to the LS100W
2.3. Accessing Console Port
There are two ways to access console port of the LS100W depending on whether the user is located
at a local site or a remote site.
- Serial console:
Local users can connect directly to the serial console port of the LS100W using serial
console/data cable (null-modem cable). The serial port of the LS100W is used as the console port
as well as the data port. To use the serial port as the console port, slide Data/Console switch to
the Console side.
- Remote console:
Remote users can make a telnet connection to the remote console port (port 23) of the LS100W
via TCP/IP network.
Both methods require the user to log into the LS100W in order to continue.
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2.3.1 Using Serial Console
1) Connect the one end of the serial console cable to the serial port of the LS100W.
Figure 2-4. Connecting a serial console cable to the LS100W
2) Connect the other end of the cable to the serial port of user’s computer.
3) Slide Data/Console switch to Console side.
Figure 2-5. Data/Console switch of the LS100W
4) Run a terminal emulator program such as HyperTerminal. Set up the serial configuration
parameters of the terminal emulation program as follows:
9600 Baud rate, Data bits 8, Parity None, Stop bits 1, No flow control
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5) Press [ENTER] key.
6) Type the user name and password to log into the LS100W. A factory default setting of the
user name and password are both admin.
7) If the user logged into the LS100W successfully, command prompt screen will appear on the
computer as shown in Figure 2-6.
login: admin
password: *****
Type 'help' to get command usages
> help
set group par1 [par2 ...] + <CR>
- group = 'ip','host','wlan','serial' or 'admin'
- par1 ... = configuration parameters. Use * to keep a parameter's value
get [group] + <CR>
- group = 'ip','host','wlan','serial','admin' or 'status'
- If group is specified, shows settings of the group.
- If group is omitted, shows settings of all groups.
help [group] + <CR>
- If group is omitted, shows this screen.
- If group is specified, shows 'set' command usage of the group.
factorydefault [option] + <CR>
- if option is omitted, all parameters are set with factory default values.
- if option='-ip',
all parameters except IP settings are set with factory default values.
save + <CR>
- Save changes
exit + <CR>
- Exit without rebooting the device
reboot + <CR>
- Exit and reboot the device
>
Figure 2-6. The LS100W console screen
From the command prompt screen, users can set, get and save configuration parameter values using
‘set’, ‘get’ and ‘save’ command. Users also can exit the console or reboot the device using ‘exit” and
‘reboot’ command. The usage of the commands can be found using ‘help’ command. For command
usages description, please refer to section 2.4 Command usage.
2.3.2 Using Remote Console
The LS100W provides remote console feature via telnet as well as serial console so that users can
access the LS100W at remote site for configuration and monitoring purpose. The IP address of the
LS100W must be known before users can access the remote console port. The port number for the
remote console is 23, which is a TCP port number assigned for Telnet.
Only one user can log into the remote console or serial console at a time. If the serial console is
established while a remote console is established, current remote console will be halted and no more
remote console will be established until serial console is finished.
To access remote console of the LS100W, please use the step as follows:
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1) Run a telnet program or a program that supports telnet functions such as TeraTerm-Pro or
HyperTerminal. The target IP address and the port number should be those of the LS100W.
If required, specify the port number as 23. Type the following command in the command line
interface of your computer.
telnet 192.168.1.254
Or run a telnet program with parameters as follows.
Figure 2-7 Telnet program set up example
2) The user has to log into the LS100W. Type the user name and password. A factory default
setting of the user name and password are both admin.
3) If the user logged into the LS100W successfully, the same command prompt screen as the
one of serial console will be displayed. The user can set, get, save configuration parameters
and exit console, reboot the device as like the serial console.
4) If serial console or the other remote consoles are connected already, new console will not be
established at all.
2.4 Command Usage
The LS100W provides several simple commands for configuration and control of the LS100W. Table
2-2 summarizes command set which LS100W supports.
Table 2-2 LS100W command set summary
Command Description Result
set group par1 [par2 ...] + <CR> Set configuration parameters
- group = 'ip', 'host', 'serial' or 'admin'
- par1 ... = configuration parameters. Use * to
keep a parameter's value
If success,
“OK” + <CR> + <LF>
If error
“ERROR” + <CR> + <LF>
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get [group] + <CR> Get configuration parameter values
- group = 'ip', 'host', 'serial', 'admin' or 'status'
- If group is specified, shows settings of the
group.
- If group is omitted, shows settings of all groups.
Parameter value display
help [group] + <CR> Shows command usage screen.
- If group is omitted, shows help screen.
- If group is specified, shows 'set' command
usage of the group.
Help message display
factorydefault [option] + <CR> Restore factory default values
- if option is omitted, all parameters are set with
factory default values.
- if option='-ip', all parameters except IP settings
are set with factory default values.
If success,
“OK” + <CR> + <LF>
If error
“ERROR” + <CR> + <LF>
save + <CR> Save changes If success,
“OK” + <CR> + <LF>
If error
“ERROR” + <CR> + <LF>
exit + <CR> Exit without rebooting the device (changes are
not applied) If success,
“OK” + <CR> + <LF>
If error
“ERROR” + <CR> + <LF>
reboot + <CR> Exit and reboot the device None
2.4.1 ‘set’ Command
With ‘set’ command, users can configure parameter values of the LS100W for each environment.
Basic ‘set’ command usage is as follows:
set group par1 [par2 ...] + <CR>
where,
group = 'ip','host', ‘wlan’,'serial' or 'admin'
par1 par2 ... = configuration parameters. Use * to keep a parameter's value
The ‘group’ is the category where the parameters should be entered. For example, if users want to set
parameters related to the IP configuration, use set command as shown in the Figure 2-8.
> set ip static 192.168.1.100 255.255.255.0 192.168.1.1
OK
>
Figure 2-8 IP configuration example screen
In the above example, the first parameter ‘ip’ indicates that the following parameters are IP
configuration parameters. The second parameter ‘static’ indicates that the LS100W will use static IP
address of the third parameter ‘192.168.1.100’. The fifth parameter indicates the subnet mask and the
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next indicates the default gateway IP address.
If users want to change only one of the parameters of the group, users can omit trailing parameters
and/or can use ‘*’ to keep a parameter value. The screen below will show how to change subnet mask
only without changing IP address and gateway IP address.
> set ip static * 255.255.0.0
OK
>
Figure 2-9 Changing only one parameter value example
Command usage of ‘set’ will differ depending on the groups. Each ‘set’ command usage of the group
can be found using ‘help group’ command. For example, if users want to know how to use ‘set’
command to configure IP configuration, typing ‘help ip’ + <CR> will show ‘set’ command usage for the
IP configuration as shown in Figure 2-10.
> help ip
set ip ipmode par1 par2 ...
- ipmode: static=Static IP / dhcp=DHCP / pppoe=PPPoE
- parameters:
if ipmode = static,
par1 = IP address,
par2 = subnet mask,
par3 = gateway
if ipmode = dhcp,
no parameters required
if ipmode = pppoe,
par1 = PPPoE username,
par2 = PPPoE password
>
Figure 2-10 Help screen example
Note:
The changed values will not take effect until ‘save’ and ‘reboot’ commands are invoked. For more
details, please refer to section 2.4.5 ~ 2.4.7.
2.4.2 ‘get’ Command
With ‘get’ command, users can view the current parameter values and status of the LS100W. Basic
‘get’ command usage is as follows:
get [group] + <CR>
where,
group = 'ip','host',’wlan’,'serial', 'admin' or 'status'
- If group is specified, shows settings of the group.
- If group is omitted, shows settings of all groups.
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The group means the category where parameters belong to as like ‘set’ command. For example, if
users want to view parameter values related to IP configuration, get command as Figure 2-11
can be used.
> get ip
IP_mode: static
IP_address: 192.168.1.100
Subnet_mask: 255.255.255.0
Gateway: 192.168.1.1
>
Figure 2-11 Getting ip configuration screen
‘status’ group is a special group where ‘set’ command does not apply. ‘get status’ will show current
system status screen.
> get status
Serial_no.: LS100W-0207_test
MAC_address: 00-0b-6b-77-88-99
F/W_REV.: V1.2.0
Current_IP: 192.168.0.125
>
Figure 2-12 Getting status screen
If group is omitted, get command will show all of the parameter values as shown in Figure 2-13.
> get
--- Status ---
Serial_no.: lS100W-023437350
MAC_address: 00-0b-6b-19-16-9e
F/W_REV.: V1.3.2
Current_IP: 192.168.1.103
--- Admin ---
Username: admin
Password: admin
Devicename: LS100W Device
--- IP ---
IP_mode: dhcp
--- Host ---
Host_mode: tcps
Local_port: 6001
Inactivity_timeout(sec): 300
--- Serial ---
Baudrate: 9600
Data_bits: 8_bits
Parity: None
Stop_bits: 1_bit
Flow_control: None
DTR_option: Always_high
DSR_option: None
Interchar_timeout(ms): 50
--- wlan ---
Name: Default
Type: Infrastructure
Encryption: 128bit
PassKey: Alphanumeric
KeyWord: WEP128BitTest
>
Figure 2-13 Getting all parameters screen
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2.4.3 ‘help’ Command
With ‘help’ command, users can find command usage help in the console screen. Basic command
usage is as follows:
help [group] + <CR>
where,
if group is omitted, overall help screen will be displayed
if group is specified, ‘set’ command usage of specified group will be displayed.
Figure 2-14 shows help screen when no group is specified while Figure 2-16 shows help screen with
‘ip’ group specified.
> help
set group par1 [par2 ...] + <CR>
- group = 'ip','host',’wlan’,'serial' or 'admin'
- par1 ... = configuration parameters. Use * to keep a parameter's value
get [group] + <CR>
- group = 'ip','host',’wlan’,'serial','admin' or 'status'
- If group is specified, shows settings of the group.
- If group is omitted, shows settings of all groups.
help [group] + <CR>
- If group is omitted, shows this screen.
- If group is specified, shows 'set' command usage of the group.
factorydefault [option] + <CR>
- if option is omitted, all parameters are set with factory default values.
- if option='-ip',
all parameters except IP settings are set with factory default values.
save + <CR>
- Save changes
exit + <CR>
- Exit without rebooting the device
reboot + <CR>
- Exit and reboot the device
Figure 2-14 Help screen
> help ip
set ip ipmode par1 par2 ...
- ipmode: static=Static IP / dhcp=DHCP / pppoe=PPPoE
- parameters:
if ipmode = static,
par1 = IP address,
par2 = subnet mask,
par3 = gateway
if ipmode = dhcp,
no parameters required
if ipmode = pppoe,
par1 = PPPoE username,
par2 = PPPoE password
Figure 2-15 Help screen with ‘ip’ group specified
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2.4.4 ‘factorydefault’ Command
With ‘factorydefault’ command, users can load factory default parameter values in console. Command
usage of ‘factorydefault’ is as follows:
factorydefault [option] + <CR>
where,
- if option is omitted, all parameters are set with factory default values.
- if option='-ip', all parameters except IP settings are set with factory default values.
Loaded values are not saved until ‘save’ command invoked. After ‘factorydefault” command, ‘save’ and
‘reboot’ commands are required for changes to take effect.
> factorydefault (or factorydefault –ip)
OK
> save
OK
> reboot
Figure 2-16 Factory default reset screen
2.4.5 ‘save’ Command
With ‘save’ command, current parameter changes are saved to non-volatile memory. Command usage
of ‘save’ command is as follows:
save + <CR>
Saved changes will be applied if the LS100W is rebooted by ‘reboot’ command or manual rebooting.
2.4.6 ‘exit’ Command
With ‘exit’ command, current serial or remote console session will be closed. However, changed
parameters are not applied until the LS100W is manually rebooted. Command usage of ‘exit’
command is as follows:
exit + <CR>
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2.4.7 ‘reboot’ Command
With ‘reboot’ command, the LS100W will be rebooted immediately. Changed parameter values will be
applied when the LS100W is up again. Command usage of ‘reboot’ is as follows:
reboot + <CR>
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3: Wireless LAN Configuration
3.1 Overview
IEEE 802.11, a Wireless LAN standard, requires one or more nodes and a wireless LAN access
point (hereinafter referred to AP) as basic network elements. Normally, the word “node” refers to the
notebook computers, personal computers, and PDAs that have Wireless LAN cards, although “node”
refers to LS100W devices in this manual.
3.1.1 Infrastructure Mode and Ad-hoc Mode
An AP is used to connect the LS100W to the Ethernet. Often it can be used to connect to the
Internet as well. This kind of mode is referred as an “infrastructure mode.” On wireless computer
networks, ”ad-hoc mode”, also called “peer-to-peer mode”, is a method for LS100W devices to
directly communicate with each other without an AP device. Ad-hoc mode can be very useful in
replacing cables between existing devices with a wireless connection method.
3.1.2 Network Name: SSID (Service Set Identifier)
In the wireless LAN network, users can set up the different names to the wireless LAN AP which
will compose the network. SSID is ID value for each AP, which is used to differentiate one network
from another. If users want to make the LS100W operate as an infrastructure mode within certain AP
network, users have to set up the SSID of the LS100W coincident with that of the AP. Therefore,
users have to check out the SSID of the AP first. However, when using ad-hoc mode, users must set
the same SSIDs to the LS100Ws which will be connected to each other. The maximum length of an
SSID that can be set in LS100W is 16 bytes. ASCII characters can be used to set it.
3.1.3 Channel
The LS100W searches for all accessible 802.11b Wireless LAN channels periodically, to find the
other APs. When the LS100W is first booted up, it searches for a preset AP (default value is ‘Default’),
and when the AP is found, it accesses that AP automatically. The LS100W should use the channel
belonging to the network group in which it belongs. In the case of infrastructure mode, the LS100W
checks the channel values being used in AP, and automatically sets the channel values identical to
the AP channels values. In ad-hoc mode, two channels in LS100W should be set to identical values.
Even when a certain value or an asterisk (‘ * ’) symbol is entered in a channel value entry using
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the ‘set’ command, the LS100W will ignore those values and automatically set the values as the AP
channel values of the group in which it belongs.
3.1.4 Security
802.11b based applications are different from wired Ethernet applications in the way they support
security functions. The 802.11 Committee recognized that the wired Ethernet supported a very high
level of internal security. Therefore, when creating policies for Wireless LAN standards, the Committee
tried to ensure the same level of for Wireless as the Ethernet had. WEP (wired equivalent privacy)
uses RSA Security's RC4 PRNG encryption algorithm and 40-bit shared key to encrypt data. Thus, in
the LS100W, 5 bytes of ASCII values are used to represent 64 bits of WEP1, and 13 bytes of ASCII
values are used to represent 128 bits of WEP1. The shortcoming of WEP is that it can encrypt only the
body of the data frame. Frame headers and other types of frames are not encrypted.
3.2 Setting
For proper operation of the LS100W in a specific environment, users must set the wireless parameters
in the LS100W’s Wireless LAN according to the requirements of the designated Wireless LAN network
environment. To do that, users must check the following:
- Type of Wireless LAN network (infrastructure/ad-hoc)
- Wireless LAN SSID and channel
- Whether a Wireless LAN WEP is used, and the WEP setting status (number of bits, key values, and
coding methods)
- Whether Wireless LAN authentication protocols are used for the Wireless LAN connection.
Some Wireless LAN networks require authentication protocols (like MD5).
Users can check the current Wireless LAN settings by using console commands:
> get wlan
Name: Default
Type: Infrastructure
Encryption: 128bit
PassKey: ASCII
KeyWord: WEP128BitTest
>
Table 3-1 Wireless Lan Settings Parameters
Parameter Values
Network Type Infrastructure mode or Ad-hoc mode
SSID Default / Max 16 characters
26
Channel 11 (can check during booting sequence)
WEP 64 or 128 bits
PassKey ASCII or Hexadecimal
z WEP1
If the WEP function is to be used, a WEP key value must be set. The WEP1 key field is used to select
between a 64 bit key or a 128 bit key. If WEP1 is set to ‘0’, the WEP function will be disabled.
z WEP2
The WEB2 field selects whether ASCII code or Hexadecimal code will be used to represent the data
values in WEP1.
z Passkey
The Passkey field is for user authentication. If the WEP1 value is 64 bits, the user must enter a
5-digit password in ASCII code. If the WEP1 value is 128 bits, the user must enter a 13-digit ASCII
password in ASCII code. For example, if WEP2 is set as a Hexadecimal code type, the user could
enter 0x0123456789 (when WEP1 is set to ‘64 ‘bits), or 0x0123456789ABCDEF (when WEP2 is set to
‘128 bits’).
The basic ‘set’ commands for Wireless Lan (WLan) settings are as follows:
set wlan name type ch WEP1 WEP2 Password
where,
name: Default / user specified network name
type: I =infrastructure / a=Adhoc
ch: set channel number for Adhoc mode / set random channel number for infrastructure
mode
WEP1: 0=none/ 1=64bit / 2=128bit
WEP2: a=ASCII type password / h=Hexadecimal type password
Password: example=’Max13character’/ example=’26AABBCCAABBCCFF’
27
4: IP Address Configuration
A valid IP address of the LS100W needs to be assigned before it starts to work in the user's network
environment. A network system administrator may provide the user with this IP address setting
information for the network. The IP address must be unique within the network. Otherwise, the
LS100W will not have a valid connection to the network.
Users can choose the desired IP mode out of the two IP operating modes, i.e., Static IP and DHCP.
The factory default IP mode is DHCP mode. Table 4-1 shows the parameter items for IP configuration.
Table 4-1. The LS100W TCP/IP session modes
IP address
Subnet mask
Static IP
Default gateway
DHCP No parameters required
Basic ‘set’ command usage for IP configuration is as follows:
set ip ipmode par1 par2 ...
where,
ipmode: ‘static’ for Static IP / ‘dhcp’ for DHCP
parameters:
if ipmode = static,
par1 = IP address, par2 = subnet mask, par3 = gateway
if ipmode = dhcp,
no parameters required
28
4.1 Static IP
4.1.1 Overview
In the Static IP mode, users have to manually specify all the parameters such as IP addresses of the
LS100W, valid subnet mask and the default gateway IP address.
IP address is an identification number assigned to a computer as a permanent address on the
network. Computers use IP addresses to identify and talk to each other on the network. Choose the
proper IP address which is unique and valid on the network environment.
A subnet represents all the network hosts at one geographic location, in one building, or on the same
local area network. When there is any outgoing packet over the network, the LS100W will check
whether the desired TCP/IP host specified in the packet is on the local network segment with the help
of the subnet mask. If the address is proven to be on the same network segment as the LS100W, the
connection is established directly from the LS100W. Otherwise, the connection is established
through the given default gateway.
A gateway is a network point that acts as an entrance to another network. Usually, the computers that
control traffic within the network or at the local Internet service provider are gateway nodes. The
LS100W needs to know the IP address of the default gateway computer in order to communicate with
the hosts outside the local network environment. For correct information on the gateway IP address,
please refer to the network administrator.
4.1.2 Static IP Configuration
To configure IP configuration parameters of the LS100W, use set command as follows:
set ip static ip_address subnet_mask default_gateway + <CR>
where,
ip_address = IP address of the LS100W
subnet_mask = Subnet mask
default_gateway = Default gateway IP address
Figure 4-1 shows IP configuration command example screen. To apply changes, users have to invoke
‘save’ and ‘reboot’ command after changing configuration.
29
> set ip static 192.168.1.10 255.255.255.0 192.168.1.1
OK
Figure 4-1. IP configuration parameters setting of Static IP mode
4.2 DHCP
4.2.1 Overview
Dynamic Host Configuration Protocol (DHCP) is a communications protocol that lets network
administrators manage and automate the assignment of IP addresses centrally in an organization's
network. DHCP lets a network administrator supervise and distribute IP addresses from a central point
and automatically send a new IP address when a computer is plugged into a different place in the
network.
As described in the section 4.1, the IP address must be entered manually at each computer in Static
IP mode and, if computers move to another location in another part of the network, a new IP address
must be entered. Meanwhile, all the parameters including the IP address, subnet mask, gateway, DNS
servers will be automatically configured when the IP address is assigned in DHCP mode. DHCP uses
the concept of a "lease" or amount of time for which a given IP address will be valid for a computer. All
the parameters required to assign an IP address are configured on DHCP server side, and each
DHCP client computer receives this information when the IP address is provided at its boot-up.
To obtain an IP address, theLS100W sends a corresponding DHCP request as a broadcast over the
network after each reset. The reply generated by the DHCP server contains the IP address as well as
the subnet mask, gateway address, DNS servers and the lease time. The LS100W immediately places
this information in its non-volatile memory. If the operating time reaches the lease time, the LS100W
will request the DHCP server for renewal of its lease time. If the DHCP server approves extending the
lease, the LS100W can continue to work with the current IP address. Otherwise, the LS100W will start
the procedure to request a new IP address to the DHCP server.
A DHCP sever assigns IP addresses dynamically from an IP address pool, which is managed by
the network administrator. This means DHCP client, i.e. the LS100W, receives a different IP address
each time it boots up. To prevent the case that users do not know the IP address of the LS100W in
such environments, its IP address should be reserved on the DHCP server side. In order to reserve
the IP address in the DHCP network, the administrator needs the MAC address of the LS100W found
on the label sticker at the bottom of the LS100:
MAC=00:0B:6B:19:16:9E
30
4.2.2 DHCP Configuration
To make the LS100W work in DHCP mode, just set IP mode to DHCP as in Figure 4-2.
> set ip dhcp
OK
>
Figure 4-2. DHCP mode configuration
31
5. Host Mode Configuration
Host mode represents the operating session mode of the LS100W. Several host modes are available
for the data communication between the serial device and remote hosts. Since TCP is connection-
oriented protocol, server, client, server/client modes are provided. Table 5-1 shows the brief
description of the host modes. A factory default host mode is TCP Server.
Table 5-1. The LS100W TCP/IP session modes
Mode Description
TCP server Select this mode, when users want the LS100W to operate as a TCP server. The LS100W
stands by until there is any TCP connection request. If TCP connection is not already
established at that time, the LS100W accepts the request and the session is established. In
the established state, it transmits the data through the serial port if there is any data from the
remote host. Since the LS100W supports only one TCP session for the serial port, the
additional TCP connection request will be rejected if already established. This mode is useful
when users want to send data to the serial device at any time they want.
TCP client Select this mode, when users want the LS100W to operate as a TCP client. When the serial
device sends data or pre-defined timer is expired, the LS100W tries to establish a TCP
connection to a remote server through its TCP port. If a TCP session is established between
them, the LS100W will send data to the server. If there’s any data from the server during the
session, it will also send the data through the serial port. However, if the LS100W failed to
connect to the remote server, the data from the serial port will be discarded. This is useful
when the serial device initiates sending data such as data gathering application.
TCP
server/client If you are not sure which mode to choose, select this mode since it will be applied in most
applications. In this mode, the LS100W operates as TCP server AND client. If the connection
is not established, it will accept all incoming connection and connect to the remote host if there
are any data from the serial device. Otherwise, it will send data back and forth. In summary,
the LS100W will work as if it is virtually connected to the remote host.
For each host mode, required parameters for configuration is summarized in Table 5-2.
Table 5-2 Host mode configuration parameters
Listening TCP port
TCP Server Inactivity timeout (sec)
Destination IP
Destination TCP Port
Cyclic connection Interval
TCP Client
Inactivity timeout (sec)
Listening TCP port
Destination IP
Destination TCP Port
Cyclic connection Interval
TCP
Server/Client
Inactivity timeout (sec)
Basic ‘set’ command usage for host mode configuration is as follows:
32
set host hostmode par1 par2 ...
where,
hostmode: tcps=TCP server / tcpc=TCP client / tcpsc=TCP server & client
parameters:
if hostmode = TCP server (tcps),
par1 = listening TCP port,
par2 = inactivity timeout (sec)
if hostmode = TCP client (tcpc),
par1 = destination IP address,
par2 = destination TCP port,
par3 = cyclic connection interval (min),
par4 = inactivity timeout (sec)
if hostmode = TCP server & client (tcpsc),
par1 = listening TCP_port,
par2 = destination IP address,
par3 = destination TCP port,
par4 = cyclic connection interval (min),
par5 = inactivity timeout (sec)
* set cyclic connection interval to 0 not to use cyclic connection
* set inactivity timeout to 0 for unlimited timeout
For easier understanding of TCP modes, a simplified State Transition Diagram is often used. And
too help users understand the diagram, the TCP state of the LS100W is briefly described as follows.
- Listen
It represents “a waiting for a connection request from any remote host”. It is a default start-up
mode when it is set as TCP server mode. This state is valid only in TCP server mode operation.
- Closed
It means “No connection state at all”. If the data transfer is completed, the state is changed to this
state if one of the host requests disconnection request. If it is in TCP server mode, the state is
automatically changed to [Listen] mode. It is a default start-up mode when it is set as TCP client
mode or TCP server/client mode.
- Sync-Received
In TCP server mode, the state will be changed from [Listen] to [Sync-Received], if any remote
host sends connection request. If the LS100W accepts the request, the state will be changed into
[Established]. This state is not valid in TCP client mode.
33
- Sync-Sent
If the LS100W sends a connection request to a remote host, the state is changed from [Closed] to
[Sync-Sent]. This state is maintained until the remote host accepts the connection request. This
state is valid only in TCP client mode.
- Established
It represents “an open connection”. If one of the hosts accepts a connection request from the
other host, the connection is opened and state is changed into [Established].
- Data
When it is in [Established] state, data from a host will be transferred to the other one. For easier
understanding of the TCP session operation, we called the state as [Data] state when actual data
transfer is performed. Actually, the [Data] mode is a part of [Established] state as is described in
the RFC 793 [Transmission Control Protocol]. This is a normal state for the data transfer phase of
the connection.
5.1 TCP Server Mode Operations
5.1.1 Overview
The LS100W works as a TCP server, and the default TCP state is [Listen] in this mode. The LS100W
supports only one TCP socket connection per one serial port. If a connection is currently established,
the additional connection requests will be rejected. The remote host will be either Ethernet-Serial
communication devices acting as a TCP client or a socket program acting as a TCP client running on
users’ PC.
1) Typical State Transition
[Listen] --> [Sync-Received] --> [Established] --> [Data] --> [Closed] --> [Listen]
At start-up, an initial TCP state is [Listen]. If there is any incoming TCP connection request, the state
will be changed into [Sync-Received], then [Established], which means a session is opened. For a
while, data will be transferred between the hosts. This is the [Data] state. The session will be
disconnected due to the request of one of them, which is [Closed] state. And then, the state is
automatically changed to its original state, [Listen].
2) Operations
34
Serial data transfer
When a session has been established, the LS100W reads the data from the serial port buffer till
internal serial buffer is full or inter-character time interval reaches the time specified as inter-
character timeout value. Then, it transfers the data to the IP address of the remote host. If there’s
no remote host connected to the LS100W, all the incoming data from the serial port are discarded.
Session disconnection
The connected session will be disconnected when the remote host sends disconnection request
or when no data transfer activity is found through the serial port for a certain amount of time,
which is “Inactivity timeout”.
Figure 5-1 shows the State Transition Diagram of the session operations in TCP server mode.
Closed
Established
Listen
Data
Incoming TCP connection request
Inactivity time-out
Incoming TCP
disconnection request
Incoming data via serial port
Incoming data
from remote host
Sync-Recvd
Accept Reject
Figure 5-1. State Transition Diagram of TCP server mode
5.1.2 TCP Server Mode Configuration
35
To configure the LS100W to work as a TCP server, use ‘set’ command as follows:
set host tcps listening_TCP_port inactivity_timeout + <CR>
where,
listening_TCP_port: Listening TCP port
Inactivity_timeout: Inactivity timeout in seconds.
Listening TCP port is the TCP port number through which remote host can connect a TCP session,
and, send and receive data. Incoming connection request to the ports other than Listening TCP Port
will be rejected. The LS100W does not restrict the number to a specific range, but it is strongly
recommended not to use the well-known ports for certain application (See Appendix D. Well-known
Port Numbers). To change the port number, select menu 2 on the TCP Server mode configuration
screen.
Inactivity timeout is set to maintain the TCP connection state as Closed or Listen in TCP host mode
unless there is any data transfer between the serial device and the LS100W. If there is no incoming or
outgoing data through the serial port during the specified inactivity timeout interval, the existing TCP
connection will be closed automatically.
If the value of inactivity timeout is set to 0, the current TCP connection is maintained unless there’s no
connection close request. Although inactivity timeout is disabled, the LS100W will check the
connection status between the LS100W and the remote host by sending “keep alive” packets
periodically. If the remote host does not answer the packets, it is regarded that the connection is down
unintentionally. Then, the LS100W will force to close the existing TCP connection.
Note:
At least, this value should be set larger than that of inter-character timeout. To prevent the unintended
loss of data due to the session disconnection, it is highly recommended that this value is set large
enough so that the intended data transfer is completed.
Figure 5-2 shows TCP server mode setting example:
> set host tcps 6001 300
OK
>
Figure 5-2. TCP server mode setting
5.2 TCP Client Mode Operations
36
5.2.1 Overview
The LS100W works as a TCP client, and the default TCP state is [Closed] in this mode. The remote
host will be either Ethernet-Serial communication devices acting as a TCP server or a socket program
acting as a TCP server running on users’ PC.
1) Typical State Transition
[Closed] --> [Sync-Sent] --> [Established] --> [Data] --> [Closed]
At start-up, an initial TCP state is [Closed]. If there is any incoming data through the serial port, the
LS100W will try to connect to a user-defined remote host. Then, the state will be changed to [Sync-
Sent], which means the connection request is being sent. If the remote host accepts the request, the
state will be changed into [Established], which means a session has been opened. For a while, data
will be transferred between the hosts. This is [Data] state. The session will be disconnected due to the
request of one of them, which is its original state, [Closed].
2) Operations
Serial data transfer
Whenever the serial device sends data through the serial port of the LS100W, data will be
accumulated to the serial port buffer of the LS100W. If the internal serial port buffer is full or inter-
character time interval reaches to the time specified as inter-character timeout value, it tries to
connect to the user-defined IP address of the remote host, if TCP session is not established yet. If
the LS100W succeeds in connecting to the remote host, the data in the serial port buffer will be
transferred to the host. Otherwise, all the data stored in the buffer will be cleared.
Session disconnection
The connected session will be disconnected when the remote host sends disconnection request
or when no data transfer activity is found through the serial port for certain amount of time, which
is “Inactivity timeout”. All the data remained in the serial port buffer will be cleared when it is
disconnected.
Connection request from remote host
All the incoming TCP connection requests will be rejected in TCP client mode.
Cyclic Connection
It Cyclic Connection function is enabled, the LS100W will make an attempt to connect to the user-
defined remote host at certain interval even if there’s no incoming serial data from the device. If
the remote host prepares certain data, it will be transferred to the serial device via its serial port
after the connection is established. Eventually, users can monitor the serial device periodically by
making the remote host send the serial command to the LS100W whenever it is connected to the
37
remote host. This option is useful when users need to gather the device information periodically
even if the serial device does not send its data periodically. Figure 4-3 shows the State Transition
Diagram of the session operations in TCP client mode.
Established
Closed
Data
Incoming data via
serial port
Inactivity time-out
TCP connection request rejected
Or
internal TCP timer is expired
TCP connection request accepted
Sync-Sent
Incoming data via
serial port
Incoming data
from remote host
Incoming TCP
disconnection request
Cyclic connection
interval time-out
Figure 5-3. State Transition Diagram of TCP client mode
5.2.2 TCP Client Mode Configuration
To configure the LS100W to work as a TCP client, use set command as follows:
set host tcpc dest_ip dest_port cyclic_connection_interval inactivity_timeout + <CR>
where,
dest_ip = destination IP address
dest_port = destination TCP port
38
cyclic_connection_interval = cyclic connection interval in minutes
inactivity_timeout = inactivity timeout in seconds.
Destination IP address and destination TCP Port are the information on the remote host to which
the LS100W will try to connect in TCP client mode. The IP address (or domain name) should be
specified together with the TCP port number.
Cyclic connection interval is the time interval at which the LS100W will try to connect to the remote
host regardless of the existence of incoming data from the serial port. If the interval is specified with a
valid value other than 0, the function is enabled. The time interval will be the specified value by the unit
of minute. If the interval is entered as 0, cyclic connection feature will be disabled.
Inactivity timeout is the same as described in TCP server mode setting section.
Figure 5-4 shows TCP client mode setting example:
> set host tcpc 192.168.1.1 6001 10 300
OK
>
Figure 5-4 TCP client mode setting
5.3 TCP Server/Client Mode Operations
5.3.1 Overview
The LS100W works as either TCP server or client according to the situation. This will be the typical
mode for most applications, since it will transfer the data either from serial port or from TCP port. The
default TCP state is [Listen] which is the same as that of TCP server mode.
1) Typical State Transition
[Listen] --> [Sync-Received] --> [Established] --> [Data] --> [Closed] --> [Listen]
Or
[Listen] --> [Sync-Sent] --> [Established] --> [Data] --> [Closed] --> [Listen]
39
The initial state is [Listen]. If there are data coming from the serial port, it will connect to the
remote host as a TCP client. If there is incoming connection request from the remote host, it
will accept the connection as a TCP server, and then transfer data through the serial port. Thus,
users can assume that the LS100W is always connected to the specified remote host.
2) Operations
The only difference from TCP server mode is that the LS100W will try to connect and send serial data
to the remote host even if the TCP session is not established. The difference from TCP client mode is
that it will accept incoming connection request from remote host if the session is not established. The
detailed operation principles are the same as that of TCP server and TCP client mode.
Established
Inactivity time-out
TCP connection request rejected
Or internal TCP time-out
TCP connection request accepted
Sync-Sent
Incoming data via serial port
Incoming data
from remote host
In-coming TCP Close request
Listen
Incoming TCP connection request
Incoming data via serial port
Sync-Recvd
Reject
Accept
Closed
Data
Figure 5-5. State Transition Diagram of TCP server/client mode
5.3.2 TCP Server/Client Mode Configuration
40
To configure the LS100W to work as a TCP server/client mode, use ‘set’ command as follows:
set host tcpsc listening_port dest_ip dest_port cyclic_connection_interval inactivity_timeout
where,
listening_port = listening TCP port
dest_ip = destination IP address
dest_port = destination TCP port
cyclic_connection_interval = cyclic connection interval in minutes
inactivity_timeout = inactivity timeout in seconds.
Parameter definitions for TCP server and client mode configuration are the same with TCP server
mode and TCP client mode parameters.
Figure 5-6 shows TCP server/client mode setting example:
> set host tcpsc 6001 192.168.1.100 7001 10 300
OK
>
Figure 5-6 TCP server/client mode setting
41
6: Serial Port Configuration
To attach the serial device to the LS100W serial port, its serial port operation should match exactly to
that of the serial device. Serial port configuration parameters are summarized in Table 6-1.
Table 6-1. Serial Port Configuration parameters
Parameter Values
Baud rate 1200, 2400, 4800, 9600, 19200, 38400, 57600, or 115200
Data bits 7 bits or 8 bits
Parity None, Even or Odd
Stop bits 1 bit or 2 bits
Flow control None, Hardware (RTS/CTS)
DTR option Always HIGH, Always LOW, or Show TCP connection
DSR option None, Accept TCP connection only by HIGH, or
Open/Close TCP connection
Inter-character timeout Inter-character timeout value in milliseconds
To configure serial port parameters, use ‘set’ command as follows:
set serial baudrate data_bits parity stop_bits flow_control dtr_option dsr_option
interchar_timeout(ms)
where,
baudrate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, or 115200
data_bits: 7=7-bits / 8=8-bits
parity: n=none / e=even / o=odd
stop_bits: 1=1-bit / 2=2-bits
flow_control: n=none / h=hardware
dtr_option: h=always high / l=always low / s=show tcp connection
dsr_option: n=none / a=accept only by high / o=open,close TCP connection
interchar_timeout: inter-character timeout value in milliseconds
The factory default settings of baud rate, data bits, parity and stop bits are 9600, 8 data bits, No-
parity and 1 stop bit respectively. Among the serial configuration, there are three serial modes the
LS100W does not support. The LS100W does not support 7 data bits, No parity, 1 stop bit
configuration. In this case, the LS100W will operate as 7 data bits, No parity, 2 stop bit mode. In case
the LS100W is configured as 8 data bits, Even(or Odd) parity, 2 stop bits mode, the LS100W will
operate as 8 data bits, Even (or Odd) parity, 1 stop bit mode.
The factory default setting of the flow control is None. Only hardware flow control using RTS/CTS is
42
supported by the LS100W. Hardware flow control method controls data communication flow by
sending signals back and forth between two connected devices.
The purpose of the DTR/DSR pin is to emulate modem signal control or to control TCP connection
state by using serial port signal. The DTR is a write-only output signal, whereas the DSR is a read-only
input signal in the LS100W side.
The DTR option can be set to one of three types: always high, always low or show TCP connection. If
the DTR behavior is set to show TCP connection, the state of the DTR pin will be maintained high if
the TCP connection is established.
The DSR option can be set to one of three types: none, allow TCP connection only by high or
open/close TCP connection. Allow TCP connection only by HIGH is valid only if host mode is TCP
server or equivalent. If this option is set, the incoming TCP connection request will be accepted only
when the DSR signal is high state. Open/close TCP connection is valid only if the host mode is a TCP
client or equivalent. If the DSR behavior is set to open/close TCP connection, the high state of the
DSR pin will make the LS100W send a connection request to the specified destination host, whereas
the low state close a connection.
Inter-character timeout defines the interval that the LS100W fetches the overall serial data from its
internal buffer. If there is incoming data through the serial port, the LS100W stores data into the
internal buffer. The LS100W transfers data stored in the buffer via TCP/IP, only if the internal buffer is
full or if the inter-character time interval reaches to the time specified as inter-character timeout.
Optimal inter-character timeout would be different according to your application but at least it must be
larger than one character interval within specified baud rate. For example, assume that the serial port
is set to 1200 bps, 8 Data bits, 1 stop bit, and no parity. In this case, the total number of bits to send a
character is 10 bits and the time required to transfer one character is
10 (bits) / 1200 (bits/s) * 1000 (ms/s) = 8.3 ms.
Therefore, you have to set inter-character timeout to be larger than 8.3 ms. The inter-character
timeout is specified in milliseconds and must be larger than 10 ms.
If users want to send the series of characters into a packet, serial device attached to the LS100W
should send characters without time delay larger than inter-character timeout between characters and
the total length of data must be smaller than or equal to the LS100W internal buffer size. The serial
communication buffer size of LS100W is 1400 bytes.
Figure 5-1 shows serial port configuration example of 9600 bps, 7 data bits, even parity, 2 stop bits,
hardware flow control, DTR shows TCP connection, No DSR behavior and inter-character time out of
10 ms:
> set serial 9600 7 e 2 h s n 10
43
OK
>
Figure 6-1 Serial port configuration
44
7: System Administration
Users can configure administrator username, password and device name using set command as
follows:
set admin username password devicename
username: login username
password: login password
devicename: device name
Figure 7-1 shows administrative parameters configuration example:
> set admin adminuser adminpassword LS100W_test1
OK
>
Figure 7-1 Administration parameters configuration
45
Appendix A: Connections
A.1 Serial Port Pin Outs
The pin assignment of the LS100W DB9 connector is summarized in Table A-1. Each pin has a
function according to the serial communication type configuration.
6 7 8 9
1 2 3 4 5
Figure A-1. Pin layout of the DB-9 connector
Table A-1. Pin assignment of the DB-9 connector
Pin RS232
1 -
2 Rx
3 Tx
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 -
A.2 Serial Wiring Diagram
Tx(3)
Rx(2)
RTS(7)
CTS(8)
DTR(4)
DSR(6)
GND(5)
Rx
Tx
CTS
RTS
DSR
DTR
GND
HelloDevice Serial Device
RS232
Figure A-2 RS232 wiring diagram
46
Appendix B: Well-known Port Numbers
The port numbers are divided into three ranges: the Well Known Ports, the Registered Ports, and the
Dynamic and/or Private Ports. The Well Known Ports are those from 0 through 1023. The Registered
Ports are those from 1024 through 49151. The Dynamic and/or Private Ports are those from 49152
through 65535.
The Well Known Ports are assigned by the IANA, and on most systems, can only be used by system
processes or by programs executed by privileged users. Table B-1 shows famous port numbers
among the well-known port numbers. For more details, please visit IANA website:
http://www.iana.org/assignments/port-numbers
Table B-1 Well-known port numbers
Port number Protocol TCP/UDP
21 FTP (File Transfer Protocol) TCP
22 SSH (Secure SHell) TCP
23 Telnet TCP
25 SMTP (Simple Mail Transfer Protocol) TCP
37 Time TCP, UDP
39 RLP (Resource Location Protocol) UDP
49 TACACS, TACACS+ UDP
53 DNS UDP
67 BOOTP server UDP
68 BOOTP client UDP
69 TFTP UDP
70 Gopher TCP
79 Finger TCP
80 HTTP TCP
110 POP3 TCP
119 NNTP (Network News Transfer Protocol) TCP
161/162 SNMP UDP
47
Appendix C: Troubleshooting
C.1 Power/LED Status Troubleshooting
Problem Cause Action
Power LED does
not light up Power cable is not
connected Check power connection
Ethernet cable is not
connected Check Ethernet cable connection Link LED does not
light up
Invalid Ethernet cable is
used There are two types of Ethernet cables: Straight-through cable
and crossover cable. If you are using an Ethernet hub, use
straight-through cable. If direct connection between the LS100W
and remote host is used, use crossover cable instead.
ACT LED does not
blink Invalid IP configuration Check IP configuration parameters
C.2 Serial Console Troubleshooting
Problem Cause Action
Invalid serial cable Be sure to use a serial console cable (null-modem cable) for
serial console
Invalid serial port
configuration of terminal
emulation program
Check serial port configuration of terminal emulation program:
9600 bps, 8 Data bits, No parity, 1 stop bit, Hardware flow
control
Serial console is not
connected
Invalid Console/Data
switch position Be sure that Console/Data switch position is Console side.
Serial console is
halted for few
seconds periodically
IP mode is DHCP, but
IP is not assigned If IP mode is set to DHCP but IP is not actually assigned
because of DHCP server failure, serial console is halted for few
seconds at every 20 seconds. Change IP mode to the static IP
mode
Cannot login to
console Invalid username and/or
password Use valid username and password. If username and/or
password are lost, perform factory default reset using factory
reset switch. Factory default value of username and password
are both admin
C.3 Remote Console Troubleshooting
Problem Cause Action
The LS100W is not
assigned valid IP
address
Use serial console to assign valid IP address to the LS100W Cannot connect to
the LS100W using
telnet
Someone is using serial
console Exit serial console and retry telnet connection
48
Cannot login to
console Invalid username and/or
password Use valid username and password. If username and/or
password are lost, perform factory default reset using factory
reset switch. Factory default value of username and password
are both admin
C.4 IP Address Troubleshooting
Problem Cause Action
Use serial console to find IP address Cannot find IP
address of the
LS100W
Use HelloDeviceManager program to probe the LS100W on the
network
The LS100W is not
assigned valid IP
address
Use serial console to assign valid IP address to the LS100W HelloDeviceManager
cannot probe the
LS100W
HelloDeviceManager
and the LS100W are not
on the same subnet
Run HelloDeviceManager on the PC that is on the same subnet
with the LS100W
C.5 DHCP Troubleshooting
Problem Cause Action
Cannot lease IP
address DHCP server is not
working Check if DHCP server is working correctly
IP address of the
LS100W is changed DHCP server does not
extend lease time Check if DHCP server is working correctly
C.6 TCP Server Mode Operation Troubleshooting
Problem Cause Action
IP configuration of
remote host is invalid Check if IP configuration of the remote host is valid
Host mode of the
LS100W serial port is
not TCP server
Change the host mode of the LS100W serial port to TCP server
or TCP server/client
IP address of the
LS100W or TCP port
number is wrong
Specify valid IP address and TCP port number of the LS100W
DSR option is set but
DSR input is not high Disable DSR option or make DSR input of the LS100W high
Cannot connect to
the LS100W
TCP connection with
the other host is
established already
Close established TCP connection or connect later
49
C.7 Serial Communication Troubleshooting
Problem Cause Action
Serial data are not
transferred by
TCP/IP immediately
Too large inter-character
timeout Set inter-character timeout with smaller value
Cannot
communicate with
the LS100W
Invalid serial port
configuration Check if serial port configuration of the LS100W are the same
with that of the serial device
Invalid data
transferred Invalid serial port
configuration Check if serial port configuration is correct.