Comtrend Corporation CT-510 User manual

CT-510
ADSL Router
User Manual
Version A3.0, June 3, 2003
261028-002

i
Preface
This manual is designed to provide information to network administrators. It
covers the installation, operation and applications of the CT-510 ADSL router.
The reader is presumed to have a basic understanding of telecommunications.
For product updates, new product releases, manual revisions, software
upgrades, and technical support visit Comtrend Corporation at
http:\\www.comtrend.com.tw
Copyright
Copyright© 2000 Comtrend Corporation. All rights reserved. The information
and messages contained herein are proprietary to Comtrend Corporation. No
part of this guide may be translated, transcribed, reproduced, in any form, or
by any means without prior written permission by Comtrend Corporation.

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Table of Content
CHAPTER 1 INTRODUCTION .........................................................6
1.1 Overview............................................................................ 6
1.2 Features ............................................................................ 7
1.3 Application ......................................................................... 8
CHAPTER 2 HARDWARE INSTALLATION .......................................9
2.1 Front Panel LED Indicators .................................................... 9
2.1.1 Rear Panel Connectors ....................................................... 10
2.2 Preparing Installation......................................................... 11
2.3 Installation ....................................................................... 13
CHAPTER 3 MANAGEMENT ..........................................................14
3.1 Getting Started ................................................................. 14
3.2 How to access CT-510 ........................................................ 15
3.2.1 Console............................................................................ 15
3.2.2 Telnet.............................................................................. 16
3.2.3 Web ................................................................................ 18
3.3 General Configuration Steps in Console/Telnet ....................... 19
3.3.1 Configuration Steps ........................................................... 19
3.3.2 Menu Layout..................................................................... 21
3.3.3 Keyboard Operations ......................................................... 22
CHAPTER 4 INITIAL CONFIGURATION (CONSOLE/TELNET) ........23
4.1 Initial Setup ..................................................................... 23
4.1.1 Bridge and Router Mode ..................................................... 23
4.1.2 CO Chipset ....................................................................... 23
4.1.3 ADSL Physical Mode........................................................... 24
4.1.4 Console Password Check .................................................... 24

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4.1.5 Console Session Timeout .................................................... 24
4.1.6 Login Name & Passwords.................................................... 24
4.2 Quick Configuration ........................................................... 25
4.2.1 LAN Interface ................................................................... 25
4.2.2 ATM Interface ................................................................... 26
4.2.3 ATM VC Parameters ........................................................... 27
4.2.4 ISP.................................................................................. 28
4.2.5 ADSL Retrain .................................................................... 29
4.3 Basic Configuration............................................................ 29
4.4 ADSL Characteristics Parameters ......................................... 30
CHAPTER 5 BRIDGING................................................................31
5.1 Overview.......................................................................... 31
5.2 Static Bridging Configuration............................................... 31
5.2.1 Add A Static MAC Entry ...................................................... 31
5.2.2 Delete a Static MAC Address ............................................... 32
5.2.3 List Static Bridging Parameters............................................ 32
5.3 Spanning Tree Protocol....................................................... 32
5.4 Forwarding Table ............................................................... 32
CHAPTER 6 IP ROUTING.............................................................33
6.1 RIP Configuration .............................................................. 33
6.2 Static Route Configuration .................................................. 34
6.2.1 Add a Static Route............................................................. 34
6.2.2 Delete a Static Route ......................................................... 34
6.2.3 List Static Routes .............................................................. 34
6.3 Routing Table.................................................................... 34
6.4 Ping Test Utility ................................................................. 35
CHAPTER 7 NETWORK & PORT ADDRESS TRANSLATION.............................36
7.1 Overview.......................................................................... 36

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7.2 Enable PAT/NAT................................................................. 36
7.3 PAT Virtual Server ............................................................. 37
7.3.1 Add Virtual Server Entry..................................................... 37
7.3.2 Delete Virtual Server.......................................................... 38
7.3.3 List Virtual Server Entry ..................................................... 38
7.4 Configure NAT/PAT IP Pools................................................. 38
7.4.1 Private IP Address ............................................................. 39
7.4.2 Global IP Address .............................................................. 39
7.4.3 Private/Global IP Pool Mapping ............................................ 39
Add a Pool Translation ........................................................ 39
Delete a NAT/PAT Pool Translation........................................ 40
List NAT/PAT Pool Translation .............................................. 40
7.4.4 Fixed NAT IP Mapping ........................................................ 40
Add a Fixed IP Address Mapping .......................................... 40
Delete a Fixed IP Address Mapping....................................... 40
List Fixed IP Mappings........................................................ 40
CHAPTER 8 DNS PROXY..............................................................41
8.1 Overview.......................................................................... 41
8.2 Configure DNS Proxy ......................................................... 41
CHAPTER 9 DHCP .......................................................................42
9.1 Overview.......................................................................... 42
9.2 Configure DHCP ................................................................ 42
CHAPTER 10 SNMP .......................................................................43
10.1 Community....................................................................... 43
10.2 Trap ................................................................................ 43
10.2.1 Add a Trap Destination Entry .............................................. 43
10.2.2 Delete a Trap Destination Entry ........................................... 44
10.2.3 List Trap Destination Entries ............................................... 44
10.3 ILMI ................................................................................ 44
CHAPTER 11 MAINTENANCE .........................................................45

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11.1 Load Factory Default Values ................................................ 45
11.2 Write System Configurations ............................................... 45
11.3 Reboot System.................................................................. 46
11.4 Software Upgrade.............................................................. 46
11.5 Configuration Backup and Restoration .................................. 47
11.5.1 Configuration Backup ......................................................... 47
11.5.2 Configuration Restoration ................................................... 47
11.6 ADI Firmware Upgrade ....................................................... 48
11.7 Homepage Upgrade ........................................................... 48
11.8 Performance Monitoring...................................................... 49
11.8.1 ADSL Status Monitor .......................................................... 49
11.8.2 ATM Interface Monitor........................................................ 50
11.8.3 ADSL Performance Statistics ............................................... 50
11.8.4 Interface Performance Monitor ............................................ 51
CHAPTER 12 WEB CONFIGURATION .............................................52
12.1 Logging on to the Web ....................................................... 52
12.2 Operation......................................................................... 54
12.2.1 Quick Setup...................................................................... 55
12.2.2 Basic Configuration............................................................ 56
12.2.3 Advance Configuration ....................................................... 56
12.2.4 Utilities ............................................................................ 58
12.2.5 Monitor ............................................................................ 58
12.2.6 Incorrect Setting ............................................................... 58
APPENDIX..........................................................................................59
Index of Console/Telnet ...................................................................... 59
Specifications .................................................................................... 66
Trouble Shooting ............................................................................... 68

6
Chapter 1 Introduction
This manual provides information about the features, installation, and operation
of CT-510 ADSL router. The following topics are covered.
 Chapter 1-2: the features and physical installation of the device.
 Chapter 3-10: operation and configuration via console and Telnet.
 Chapter 11: maintenance via console and Telnet.
 Chapter 12: operation & configuration via Web.
1.1 Overview
The CT-510 ADSL router uses the ADI chipset to satisfy the needs of multiple
users for small office/home office and remote office/branch office applications.
The router has an integrated 4-port 10-BaseT, half-duplex Ethernet hub. It can
access the Internet, Corporate LAN or Video on demand over one ordinary
telephone line at speeds up to 11 Mbps. In addition, it supports up to 16
virtual concurrent connections to multiple destinations. It also has full routing
capabilities to segment/route IP protocol and is capable of bridging other
protocols.

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1.2 Features
 Compact and high performance standalone unit
 Bridge/Routing function
 Fast ADSL up to 11 Mbps

ANSI T1.413, G.DMT, G.lite
 Auto-negotiation rate adaptation

AAL5 for ATM over ADSL
 UBR / CBR /VBR ATM services
 VC-based and LLC multiplexing
 Up to 16 VCs
 4 port 10BaseT Ethernet hub, half-duplex
 One console port for local management
 Embedded SNMP agent and ADSL Forum TR-006 ADSL Line MIB
 Web-based management
 Configuration backup and restoration
 OAM F4/F5
 Static route/ RIP/RIP v2 routing function
 Dynamic IP assignment and Network Address Translation
 POTS splitter and micro filter available

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1.3 Application
The following diagrams a possible application of CT-510. It can be used for
G.lite and G.DMT applications.
Figure 1-1 Application of CT-510
ANSI T1.413
ADSL
ADSL (G.lite)
POTS splitter shel
f
A
TM
PSTN
Micro filter
POTS splitter
CT-510
CT-510

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Chapter 2 Hardware Installation
2.1 Front Panel LED Indicators
There are 12 LED indicators on the front panel (Fig.2-1). The description of
each LED is given in the table below.
DATA
TX LINKHIGH
MID
LOW ALERTCOL4X2X1X 3X POWER
HUBCT-510
LED Color Mode Function
On 12VAC power input is supplied to this unit
POWER Green Off Power is not connected
Off Normal status
On An alarm has been detected
ALERT Red
Flash Software downloading or self-testing
On Collision occurs over Ethernet
COL Yellow
Off No collision is detected
On The physical connection between Ethernet port (1x,
2x, 3x, or 4x) and LAN device is established
Off Ethernet connection is not made
1X~ 4X Green
Flash Receive data
On The physical ADSL link between RJ11 and telephone
line is established
Flash ADSL link is training
LINK Green
Off ADSL link not established
HIGH Red On
The ratio of downstream data traffic to downstream
ADSL link bandwidth is larger than 50% and less
than 75%.
MID Yellow On
The utilization ratio is larger than 25% and less than
50%.
LOW Green On
The utilization ratio is larger than 0% and less than
25%.
On Transmit data over ADSL link
DATA TX Green Off No data is transmitted over ADSL link

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Note 1. The HIGH, MID, and LOW LEDs are ON when the utilization ratio for
downstream data is over 75%.
Note 2. The HIGH, MID, and LOW LEDs are OFF when no downstream data is received.
2.1.1 Rear Panel Connectors
There are seven connectors on the rear panel. To make a connection using
these connectors, please refer to Section 2.3.
Power Console 4x 3x 2x 1x ADSL
Figure 2–1 CT-510 Rear Panel Connectors

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2.2 Preparing Installation
Make sure the following equipment is ready before installing the CT-510.
• A VT-100 Compatible Terminal –
This terminal is essential to perform the initial configuration of the
CT-510. Normally this is a terminal with VT-100 emulation program,
such as Telix.
• A Console Port Cable to connect to Console port –
An RS-232, DB9-to-DB9 straight through cable is required to connect
the terminal to the unit. The following table lists the pin
assignments of the DB9 console port. Only Pin2, 3 and 5 are used.
Pin Definition Pin Definition
1 - 6 -
2 TD 7 -
3 RD 8 -
4 - 9 -
5 GND
Table 2–1 Pin Assignments of Console Port
• An AC power adapter cord to connect to the Power jack–
A 110 VAC to 12 VAC or 220 VAC to 12 VAC power adapter cord is
shipped with the unit. It is used to provide the necessary power for
the unit’s operation.
• RJ45 10BaseT Ethernet connector cable(s) to connect to 1x –
4x ports–
An RJ45 LAN connection cable is needed to connect the CT-510 to the
Local Area Network (LAN). Maximum four Ethernet cables are
required for 1x ~ 4x LAN port connection to the Ethernet devices.
The pin assignments of the RJ45 connector are listed below.
Pin Definition Pin Definition
1 RD+ 5 -
2 RD- 6 TD-
3 TD+ 7 -
4 - 8 -
Table 2–2 Pin assignments of RJ45 Port

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• An RJ11 connection cable to connect to ADSL port–
An RJ11 connector cable is used to connect the CT-510 to the
telephone line from the telephone company. The following lists the
pin assignments of the RJ11 connector.
Pin Definition Pin Definition
1 - 4 ADSL_TIP
2 - 5 -
3 ADSL_RING 6 -
Table 2–3 Pin Assignments of RJ11 Port
• Optional POTS splitter for G.DMT and ANSI T1.413 features –
To carry both data and voice signals over an ADSL link, a POTS
splitter is necessary.
• Optional micro filter for G.lite feature –
A micro filter is required for G.lite application.

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2.3 Installation
The backplane connectors of the CT-510 can be configured to the following
connections. Figure 2-3 illustrates possible connections of these connectors.
RS-232
110 / 220 VAC
(50-60 Hz)
Phone Line
RJ45
12VAC
Power
Adapter
POTS
Splitter
RJ11
Power
Phone
Console
VT-100 Terminal
1x
2x
3x4x
Ethernet Equipment
RJ45
Ethernet Equipment
Ethernet Equipment
Ethernet Equipment
RJ45
RJ45
Figure 2–2 CT-510 Configuration
Step 1 Connect the power jack to the AC power supply with a power
adapter cord.
Step 2 Connect any of the Ethernet ports (1x ~4x) to the LAN with RJ45
connector cables. Up to four Ethernet ports can be connected.
Step 3 Connect the Console port to a VT-100 compatible terminal for local
management with an RS-232 straight through cable.
Step 4 Connect the ADSL port to a POTS splitter with an RJ11 connector
cable.
Caution 1: If the unit fails to power on, or it malfunctions, first verify the power
supply is correctly connected. Then power it on again. If the symptom
persists, please contact our technical support engineers.
Caution 2: Always disconnect all telephone lines from the wall outlet before servicing
or disassembling this equipment.

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Chapter 3 Management
3.1 Getting Started
This section is to help the users who will access the device for configuration,
operation, or monitor purpose. It collects some important messages and
suggestions that users may ignore during their operation. You may see the
same messages or expressions throughout the content, just to keep from
incorrect operations. It is recommended that users read this section before
configuring or operating the device.
1. Access password
Password is always required to access the Telnet or Web. For console, a
“Console Password Check” option is provided that the user can enable or
disable this function. When set to Enabled, a password will be required to
access the console. The default value of this function is disabled. For more
details, please refer to Section 4.1.2.
2. Write the system configurations into the flash memory
(Telnet/Console)
After you have modified the parameters of the device, always write them into
the flash memory by entering the MAIN/WRITE menu and then reboot the
device from the MAIN/REBOOT menu. If this procedure is not taken, the
parameters you have changed will be lost after you end the access or reboot
the device.
3. Loading default values(Telnet/Console)
If you want to retrieve the default values, enter the MAIN/CONF/DEFAULT menu
and enter the MAIN/WRITE and then MAIN/REBOOT menu.

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3.2 How to access CT-510
Three methods are available to access the device. You can choose from
console, Telnet, or Web. Any of the methods can be used to access, configure,
operate or monitor the device. Below shows how to get accessed to the
device.
3.2.1 Console
Your console PC should be installed with VT-100 emulation program, such as
Telix or HyperTerminal 5. Before you manage the system, verify all the
connections are made correctly.
Step 1 Start a standard VT-100 program such as Telix from the local
terminal and set the console parameters as follows:
 Baud rate: 9600
 Parity: none
 Data bits: 8
 Stop bit: 1
 Flow control: none
Step 2 Initially, the console password check function is disabled; therefore,
you will not be prompted to enter a password. After the session
parameters are set up, as shown in Step 1, press any key to display
the following message:
“Press ESC key to enter console mode configuration”.
Step 3 Press the ESC key to display the main menu.
Step 4 You can start operating this device now. General configuration
procedures are described in Section 3.2.
Step 5 You can assign either a LAN IP address (proceed to Step 6) or WAN
IP address (proceed to Step 7) that is needed to access the device
through Telnet or through the Web.
Step 6 To change a LAN IP address, enter the MAIN/QC/LAN menu.

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Step 7 To change a WAN IP address, enter the ATM interface menu, e.g.,
MAIN/QC/ATM/ATM1 (refer to Section 4.2.2, ATM Interface, for
details).
Step 8 Hold down the Ctrl-S keys to save the IP address.
Step 9 Enter the MAIN/CONF/SYSTEM menu to set the passwords.
Step 10 You can enable the console password check function in the Console
Password Check field. After you enable it, a password will be
required to access the device through the console.
Step 11 Enter the ADMINISTRATOR password in the New Administrator
Password field, and retype the password to confirm.
Step 12 Enter the USER password in the New User Password field, and
retype the password to confirm.
Step 13 Hold down the Ctrl-S keys to save the parameters.
Step 14 Return to the main menu and select WRITE to write the
configurations to the flash memory.
Step 15 Return to the main menu and select REBOOT to reboot the system.
Step 16 In less than one minute, the sentence “Press ESC key to enter
console mode configuration” displays.
Note 1: If you use HyperTerminal for the VT-100 emulation program, Edition 5.0 is
recommended.
Note 2: After changing the parameters, make sure that you save them in the flash
memory and then reboot the system before you quit. Otherwise, you will lose
the new parameters.
3.2.2 Telnet
Telnet can be used by maximum one ADMINISTRATOR and two common users
at the same time.
Step 1 Telnet to the device with the LAN IP address or WAN IP address
(refer to Section 3.1.1, Steps 5-8 for information on setting the
LAN/WAN IP address). The default LAN IP address is
210.65.231.206.
Step 2 You will be prompted to enter your user name and password.
Comtrend Corporation
CT-510 ADSL Router
Login:root
Password:****
To have full access privileges as an ADMINISTRATOR, type root in
the Login field. If the default password was changed, type the
password that was set in the console session (refer to Section

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3.1.1, Steps 9-13). If the default password was not changed, type
root.
To have read-only access as a common USER, type user in the
Login field. If the default password was changed, type the
password that was set in the console session (refer to Section
3.1.1, Steps 9-13). If the default password was not changed, type
user.
Step 3 The main menu displays. The menus in a Telnet session are the
same as in the console session.

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3.2.3 Web
Web-based management can be used by only one person at any one time. It
is ENABLED by factory default. To disable it, enter the MAIN/CONF/HTTPD
menu in console or Telnet.
Step 1 Access the device through the Web browser with the LAN IP
address or WAN IP address (refer to Section 3.1.1, Steps 5-8 on
setting the LAN/WAN IP address). The default LAN IP address is
210.65.231.206.
Step 2 You will be requested to enter the login name and password.
To have full access privileges as an ADMINISTRATOR, type root in
the Login Name field. If the default password was not changed,
type the password that was set in the console session (refer to
Section 3.1.1, Steps 9-13). If the default password was not
changed, type root.
To have read-only access as a common USER, type user in the
Login Name field. If the default password was changed, type the
password that was set in the console session (refer to Section
3.1.1, Steps 9-13). If the default password was not changed, type
user.
Step 3 The main page displays.
Step 4 For more information on configuring the CT-510 through the Web,
refer to Chapter 12.
Note: When a user has entered the system via the Web, no other users can access the
device via the Web at the same time. Other users can access the device
through the console or through Telnet.

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3.3 General Configuration Steps in Console/Telnet
3.3.1 Configuration Steps
The CT-510 should be configured from the main menu, branch menu to leaf
menu in order. To explain conveniently in this document, we denote each
menu’s operating sequence by path prompts. You can easily find the directory
of the menu, branch menu, or leaf menu via the path.
For example, if you want to configure the LAN interface of the CT-510, please
complete the following procedures.
Step 1 Enter the main menu.
The path prompts MAIN to indicate the directory of the current
operating menu.
Step 2 Use the up or down arrow keys to select an item. In this case,
select QC. Press the right arrow key to go to the MAIN/QC
branch menu.
The path prompts MAIN/QC to indicate the directory of the current
operating menu.
Step 3 Use the up or down arrow keys to select an item. In this case,
select LAN and press the right arrow key to enter the leaf menu.
The path prompts MAIN/QC/LAN.