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TRENDnet
TW-H6W1IR
ISDN Router
User’s Guide
Rev. 01 Nov., 1999
Printed in Taiwan
6TWH6W1IR.01
RECYCLABLE
TW-H6W1IR ISDN Remote Router
Copyright Statement
Copyright ©1999 TRENDware
No part of this publication may be reproduced in any form or by any
means or used to make any derivative such as translation,
transformation, or adaptation without permission TRENDware, as
stipulated by the United States Copyright Act of 1976.
Trademarks
TRENDnet is a registered trademark of TRENDware.
All other trademarks belong to their respective owners.
TW-H6W1IR ISDN Remote Router
ii Introduction
Table of Contents
INTRODUCTION.................................................................................1
Product Features.......................................................................................................2
Applications for your TW-H6W1IR.........................................................................5
Internet Access .......................................................................................................... 5
Network Address Translation (NAT)....................................................................... 5
LAN-to-LAN Enterprise Connections...................................................................... 5
Telecommuting Server................................................................................................ 5
What This Manual Covers.......................................................................................6
What This Manual Doesn’t Cover..........................................................................7
Other Resources.........................................................................................................7
Packing List...............................................................................................................8
Additional Installation Requirements...................................................................8
INSTALLATION .............................................................................. 10
Ordering Your ISDN Line........................................................................................ 10
The TW-H6W1IR Front Panel................................................................................11
The TW-H6W1IR Rear Panel.................................................................................12
Telephone Features................................................................................................13
Installation and Initial Configuration................................................................14
A Warning on Connection Cables ............................................................................ 15
Step 1 - Setting up the Console ............................................................................... 15
Step 2 - Connecting the Console to the Router ....................................................... 16
Step 3 - Connecting an ISDN Line to the Router .................................................... 17
Step 4 - Connecting a Telephone or Fax Machine to the Router............................. 17
Step 5 - Connecting Ethernet Cables to the Router................................................. 18
Step 6 - Powering Up Devices for Initial Configuration.......................................... 20
Step 7 - Initial Configuration of the Router............................................................. 21
TW-H6W1IR ISDN Remote Router
Step 7 - Configuring the LAN Port.......................................................................... 22
Step 8 – Plugging in All Devices .............................................................................. 24
CONFIGURATION AND MANAGEMENT.......................................... 26
Console Program Main Menu..............................................................................27
System Information..................................................................................................28
Interface Configuration.........................................................................................30
LAN Sub-menu........................................................................................................ 31
ISDN Sub-menu....................................................................................................... 32
Network Configuration..........................................................................................35
IP Stack Configuration............................................................................................. 35
IP Static Route......................................................................................................... 40
IP Networking.......................................................................................................... 42
Router Advertisement.............................................................................................. 42
SNMP Agent Configuration..................................................................................43
SNMP Community Configuration........................................................................... 44
SNMP Trap Manager.............................................................................................. 45
SNMP Authenticated Trap ..................................................................................... 46
Advanced Functions...............................................................................................47
Remote Access Configuration.................................................................................. 47
DHCP Configuration ............................................................................................... 61
Filter Configuration.................................................................................................. 65
Multiple Home Configuration ................................................................................. 72
Static ARP ............................................................................................................... 74
NAT Configuration.................................................................................................. 76
Configure NAPT for Special Ap[plication]s........................................................... 92
Telnet/Discovery Enable.......................................................................................... 95
DNS Configuration .................................................................................................. 96
Radius Configuration ............................................................................................... 98
PPP Configuration ................................................................................................. 100
Admin[istration] Configuration.......................................................................106
System Maintenance............................................................................................107
System Status ........................................................................................................ 107
Statistics................................................................................................................. 108
TW-H6W1IR ISDN Remote Router
iv Introduction
Log and Trace......................................................................................................... 114
Diagnostic .............................................................................................................. 117
Software Update.................................................................................................... 123
System Restart....................................................................................................... 124
Factory Reset......................................................................................................... 124
System Settings Backup/Restore........................................................................... 124
PROM SYSTEM CONFIGURATION.............................................126
System Configuration ............................................................................................ 127
TCP/IP Parameters Configuration ......................................................................... 128
System Reset ......................................................................................................... 129
Software Update.................................................................................................... 129
EEPROM Factory Reset ....................................................................................... 132
Execute Bootload ................................................................................................... 132
USING TELNET ...........................................................................133
Telnet Configuration...........................................................................................133
Using Telnet via LAN............................................................................................ 133
Using Telnet via ISDN........................................................................................... 134
System Timeout..................................................................................................... 134
USING RADIUS AUTHENTICATION...........................................135
Installing a RADIUS Server................................................................................135
Configuring the TW-H6W1IR for RADIUS Authentication...........................135
Adding Users to the RADIUS Database...........................................................137
APPENDIX A - TROUBLESHOOTING...........................................138
Some Common Problems With the TW-H6W1IR..............................................138
None of the LEDs are on when you power up the router..................................... 138
Connecting the RS-232 cable, cannot access the console program ........................ 138
Problems With the ISDN Line.............................................................................139
Problems with the LAN Interface.......................................................................139
TW-H6W1IR ISDN Remote Router
Can’t PING any station on the LAN .................................................................... 139
APPENDIX B - IP CONCEPTS.....................................................141
IP Addresses..........................................................................................................141
IP Network Classes ............................................................................................... 142
Subnet Mask..........................................................................................................143
APPENDIX C IP PROTOCOL AND PORT NUMBERS ...............145
IP Protocol Numbers...........................................................................................145
IP Port Numbers...................................................................................................145
APPENDIX D - TECHNICAL SPECIFICATIONS ............................147
APPENDIX E COUNTRY ID NUMBERS ....................................149
APPENDIX F CONFIGURATION FILE.......................................150
Configuration File Example..............................................................................151
INDEX ..........................................................................................153
TW-H6W1IR ISDN Remote Router
Introduction 1
Introduction
Congratulations on your purchase of a TRENDnet TW-H6W1IR
ISDN router with integrated Ethernet hub and ISDN T/A. No larger
than an ordinary modem, your router offers inexpensive yet complete
telecommunications and internetworking solutions for your home or
branch office. It is ideal for everything from Internet browsing to
receiving calls from Remote Dial-in Users and making connections to
other LANs via Remote Nodes.
Distinguishing features of the TW-H6W1IR include support for a full
range of networking protocols including TCP/IP (Transmission Control
Protocol/Internet Protocol, also known as IP) and Transparent
Bridging.
This complete solution also includes remote dial-in user support, an
Internet single-user account (Network Address Translation) option,
extensive network management capabilities, and solid security features.
TW-H6W1IR ISDN Remote Router
2 Introduction
Product Features
The TW-H6W1IR router is packed with features that give it the
flexibility to provide a complete networking solution for almost any
small to medium-sized office environment.
Ease of Installation
Your TW-H6W1IR is a self-contained unit that is quick and easy to
install. Physically, it resembles an external modem; however, it is a
combination ISDN router and 10 Mbps Ethernet hub, and it uses
twisted-pair Ethernet cables to connect to the host network.
Built-in Hub
As a 10 Mbps Ethernet hub, your TW-H6W1IR provides six ports for
connecting standard Ethernet devices. Five ports are designed for
connecting network end nodessingle-user computers, servers,
bridges, other routers, etc.through standard “straight-through”
twisted-pair cables; the sixth is wired for making an “uplink” connection
to another hub or switch through the same type of straight-through
cable used to connect end nodes.
ISDN Basic Rate Interface (BRI)
Using a standard S/T the TW-H6W1IR supports DSS1 ISDN
switches. The two ISDN B-channels can be used independently for
two destinations, or they can be bundled together for one high-
bandwidth connection supporting bandwidth-on-demand.
TW-H6W1IR ISDN Remote Router
Introduction 3
ISDN Leased Line
If the router is set up for an ISDN leased line, it can automatically
initialize the leased-line connection each time it is powered up.
Standard Phone Jacks
The router is equipped with two standard phone jacks for connecting
telephones, fax machines, or modems. This allows the ISDN line to be
used for voice as well as data calls.
Dial On Demand
The Dial On Demand feature allows a TW-H6W1IR to automatically
place a call to a Remote Node whenever there is traffic coming from
any workstation on the LAN (Local Area Network) to that remote site.
Bandwidth On Demand
Your TW-H6W1IR supports bandwidth up to 128 kps over a single
ISDN BRI line. It incorporates MLPPP (Multi-Link PPP) to bundle
two B channels over a BRI line. In addition, the router dynamically
allocates bandwidth between the two B channels, increasing or
decreasing bandwidth as needed to allow for greater efficiency in data
transfer. It supports BAP (Bandwidth Allocation Protocol) and BACP
(Bandwidth Allocation Control Protocol) to manage the number of links
in the multi-link bundle.
Full Network Management
The TW-H6W1IR incorporates SNMP (Simple Network
Management Protocol) support and menu-driven network management
via an RS-232 or Telnet connection.
TW-H6W1IR ISDN Remote Router
4 Introduction
RADIUS (Remote Authentication Dial In User Service)
The RADIUS feature allows you to use a central external Unix or NT-
based server to support thousands of users.
PPP Security
The TW-H6W1IR supports PAP (Password Authentication Protocol)
and CHAP (Challenge Handshake Authentication Protocol).
RIP-1/RIP-2
Your TW-H6W1IR supports both RIP-1 and RIP-2 (Routing
Information Protocol versions 1 and 2) exchanges with other routers.
DHCP Support (Dynamic Host Configuration Protocol)
DHCP (Dynamic Host Configuration Protocol) allows IP addresses to
be automatically and dynamically assigned to hosts on your network.
Data Compression
The TW-H6W1IR incorporates Stac data compression and CCP
(Compression Control Protocol).
Networking Compatibility
The TW-H6W1IR is compatible with remote access products from
other companies such as Ascend, Cisco, and 3Com. Furthermore, they
support Microsoft Windows 95 and Windows NT remote access
capability.
TW-H6W1IR ISDN Remote Router
Introduction 5
Applications for your TW-H6W1IR
Some applications for the TW-H6W1IR include:
Internet Access
Your TW-H6W1IR supports TCP/IP protocol, which is the language
used for the Internet. It is also compatible with access servers
manufactured by major vendors such as Cisco and Ascend.
Network Address Translation (NAT)
For small office environments, the TW-H6W1IR allows multiple users
on the LAN to access the Internet concurrently through a single Internet
account. This provides Internet access to everyone in the office for the
price of a single user.
NAT address mapping can also be used to link two IP domains via a
LAN-to-LAN connection.
LAN-to-LAN Enterprise Connections
The TW-H6W1IR can dial to or answer calls from another remote
access router connected to a different LAN. The TW-H6W1IR
supports TCP/IP and has the capability to bridge any Ethernet
protocol.
Telecommuting Server
The TW-H6W1IR allows Remote Dial-in Users to dial in and gain
access to your LAN. This feature enables users that have workstations
TW-H6W1IR ISDN Remote Router
6 Introduction
with remote access capabilities, e.g., Windows 95, to dial in using an
ISDN terminal adapter (TA) to access the network resources without
physically being in the office.
What This Manual Covers
This manual is divided into eleven parts.
Chapter One, Introduction, describes many of the
technologies implemented in the TW-H6W1IR as well as
product features, etc. TW-H6W1IR to operate on your
LAN.
Chapter Two, Installation, is designed as a step-by-step
guide to installing the router.
Chapter Three, Configuration and Management, provides
detailed explanations for the console program that is used to
setup and configure the router.
Chapter Four, PROM System Configuration, provides
information on the PROM program, an abbreviated version of
the console program that is used to download new software
into the router in case of problems with the console program.
Chapter Five, Using Telnet, describes how to setup and use
telnet to configure the router.
Chapter Six, Using RADIUS Authentication, describes
how to setup and use a RADIUS server to manage user
authentication and centralize passwords.
Appendix A, Troubleshooting, describes some common
problems setting up the router and suggests solutions.
TW-H6W1IR ISDN Remote Router
Introduction 7
Appendix B, IP Concepts, gives detailed explanations and
recommendations for setting up an IP network on your LAN.
Appendix C, IP Protocol and Port Numbers, lists many
commonly used IP settings.
Appendix D, Technical Specifications, a list of
specifications about the TW-H6W1IR ISDN router.
Appendix E, Country ID Numbers, lists country ID
numbers which must be entered when setting up the ISDN
line on the router. These numbers have no relation to the
International Country Codes used by your telephone
company.
Regardless of the application, it is important that you follow the steps
outlined in Chapter 2, Installation, to correctly connect your TW-
H6W1IR to your LAN. You can then refer to other chapters of the
manual depending on your specific installation requirements.
What This Manual Doesn’t Cover
This manual assumes that you know how to use your computer and are
familiar with your communications software. If you have questions
about using either one, refer to the manual for the product.
Other Resources
For more information about your TW-H6W1IR check the following
sources:
? ?Quick Installation Guide.
TW-H6W1IR ISDN Remote Router
8 Introduction
? ?Support disk containing RouteMan, a Windows-based
configuration program used to set up and configure the router.
Packing List
Before you proceed further, check all items you received with your
TW-H6W1IR against this list to make sure nothing is missing. The
complete package should include:
? ?One TW-H6W1IR ISDN router.
? ?One power adapter.
? ?One RS-232 cable.
? ?One unshielded twisted-pair (UTP) cable.
? ?One Quick Installation Guide.
? ?This User’s Guide (on diskette).
Additional Installation Requirements
In addition to the contents of your package, there are other hardware
and software requirements you need before you can install and use your
router. These requirements include:
? ?An ISDN line.
? ?Ethernet connection(s) to your computer(s).
? ?A computer equipped with an RS-232 port and communications
software configured to the following parameters:
?? VT100 terminal emulation.
?? 9600 baud.
TW-H6W1IR ISDN Remote Router
Introduction 9
?? No parity, 8 data bits, 1 stop bit.
After the router has been successfully connected to your network, you
can make future changes to the configuration using a Telnet client
application.
TW-H6W1IR ISDN Remote Router
10 Installation
Installation
This chapter outlines how to connect your TW-H6W1IR to your LAN
and ISDN line. Refer to the diagrams below to identify all of the ports
on your device when you make connections.
Ordering Your ISDN Line
If you do not have an ISDN line installed already, we suggest that you
order it from your telephone company as soon as possible to avoid the
long waiting period common when ordering a new line. Use the
information in this section to place the order. If you have already
installed your ISDN line, you can check the following section to make
sure that you can use all the features of your TW-H6W1IR.
1. Contact your local telephone company’s ISDN Ordering Center.
2. Make sure DSS1 switches are available since these are the only
switch types currently supported by the TW-H6W1IR.
3. When the telephone company installs your ISDN line, be sure to
obtain the following information:
?? ISDN switch type.
?? ISDN telephone number(s).
TW-H6W1IR ISDN Remote Router
Installation 11
The TW-H6W1IR Front Panel
Names and descriptions of your router’s front panel LEDs are given
below:
POWER Comes on as soon as you connect the router to the power
adapter and plug the power adapter into a suitable AC outlet.
TEST Should be blinking if the router is functioning properly.
ISDN LINK Indicates that the router has an ISDN line connected
to the ISDN interface and it has been successfully initialized.
ISDN B1 and B2 On if there is an active ISDN session on that
channel or if that channel is making or receiving a call.
ETHERNET COL Shines yellow when a collision occurs on the
LAN, that is, when two devices have attempted to transmit at the same
time.
ETHERNET Uplink and 1 through 5 Each of these indicators
shines green when a connection to an Ethernet device is detected. The
indicator blinks when a transmission is received from the device, and
shines yellow when the device has been partitioned, that is, temporarily
isolated from the LAN because of excessive collisions (partitioning is a
required capability of all Ethernet hubs).
TW-H6W1IR ISDN Remote Router
12 Installation
PHONE – 1 Lights up when standard phone port 1 is in use.
PHONE – 2 Lights up when standard phone port 2 is in use.
The TW-H6W1IR Rear Panel
POWER This socket is an 18 volt, 750mA power input jack. If the
power adapter included with the router has been lost or misplaced,
please ensure that the replacement adapter meets both the voltage and
amperage requirements.
CONSOLE This 9-pin RS-232 port is used for connecting a console
or PC running a terminal emulation program. It provides out-of-band
management capabilities for the initial setup and configuration of the
router.
PHONE 1 and 2 These normal telephone jacks can be used to
connect telephones or fax machines to the router for use over the ISDN
lines. Plug telephone devices into these jacks as you normally would
into a telephone wall socket.
ISDN This socket is used to connect the ISDN line to either an NT-
1 or directly to the ISDN wall jack, depending on the type of service
delivered by your phone company.
ETHERNET The six Ethernet ports function as a normal 10 Mbps
10BASE-T Ethernet hub.
TW-H6W1IR ISDN Remote Router
Installation 13
?? Uplink This port is used to connect the router to another
hub using a straight-through twisted-pair cable.
?? Ports 1x to 5x These five ports can be used to connect
end-stations to the router using straight-through cables.
Telephone Features
Up to two telephones can be attached to the TW-H6W1IR router via
the Phone 1 and Phone 2 telephone jacks located on the rear of the
router. The router enables the attached telephones to have a number of
features which may or may not be found on normal telephones and are
described below. Additional features which must actually be configured
are described in the Interface Configuration – ISDN Sub-menu
section of this manual.
? ? Hold This feature is very similar with and can work in conjunction
with call waiting as defined in the Interface Configuration – ISDN
Sub-menu section of this manual. Press Flash 0 to place someone
on hold (Flash is a very brief hanging up of the phone). Press Flash
2 to take the caller off hold.
? ? Hold (and pick up from another location) - Telephones
connected to the router can be put on hold by pressing Flash 71,
72, 73, or 74. Press the same number to take the caller off hold
and speak from another phone on your telephone network.
? ? Call forwarding If you wish to forward incoming calls to a
different telephone, press *77* and then the phone number you
wish to forward the call to. All incoming calls will automatically be
TW-H6W1IR ISDN Remote Router
14 Installation
forwarded to the phone number entered. Press #77# to cancel call
forwarding.
? ? Three-person conference call To use this feature, conference
calling must be enabled by the telephone company. After this is
done, pick up a phone and place a call. After connected, press
Flash 0 (refer to call waiting in the Interface Configuration
ISDN Sub-menu section of this manual) and dial the second
number. After connected, press flash 3 to speak to both parties at
the same time. Press Flash 0 to hang up with the first party called.
Press flash 1 to hang up with the second party called.
? ? Call transfer To transfer a call to the other phone jack on the
router: if using Phone 1, press flash 20. If using Phone 2, press flash
10.
Installation and Initial Configuration
This section discusses the different connections that can be made to the
router when setting it up.
Initially, you will only wish to connect the console to the router in order
to configure the other ports. Once that is complete, you will need to
turn off the power to the router and plug in the connection cables to the
other devices. Next, power on the other devices. When they have
finished powering up, power on the router. Each of these steps is
described in detail in the sections below. Please skip any setting
adjustments that do not apply to your configuration needs.
TW-H6W1IR ISDN Remote Router
Installation 15
For the initial configuration of your TW-H6W1IR, you must use an
RS-232 console connection, either to a computer running serial
communications software or to a serial data terminal.
After the router has been successfully installed and the initial
configuration is complete, you can continue to modify settings through
the console, or you can change configuration settings through a remote
Telnet connection or through a web browser. See the chapters entitled
Configuration and Management and Using Telnet for detailed
instructions on using Telnet to configure your TW-H6W1IR.
A Warning on Connection Cables
ISDN and Ethernet cables are very similar to each other. It is important
that you use the correct cable for each connection; otherwise, your
router could be damaged.
Before connecting or disconnecting an RS-232 cable between two
devices, turn both devices off to avoid any chance of damaging them.
Step 1 - Setting up the Console
The initial setup of the TW-H6W1IR, requires connecting a console
to the 9-pin RS-232 Diagnostic port on the router’s rear panel. A
serial cable is supplied with the router in order to make this
connection. A console can be a terminal, such as a VT-100, or a
normal PC running terminal emulation software (such as Microsoft
HyperTerminal, included with Windows). The terminal emulation
software needs to be configured to the following parameters:
?? VT100 terminal emulation
TW-H6W1IR ISDN Remote Router
16 Installation
?? 9600 baud
?? No parity, 8 data bits, 1 start bit, 1 stop bit
?? No flow control
Step 2 - Connecting the Console to the Router
A serial cable is included in the TW-H6W1IR package. To connect
this cable, plug its nine-pin connector into the 9-pin RS-232 Diagnostic
port on the router’s rear panel, then connect the other end to the serial
port on the rear of your computer or data terminal.
Please make sure both machines are turned off before making this
connection.
After the connection is made, first power on the console. If you are
using a PC, run the terminal emulation software at this time. After the
PC and the terminal emulation software are up and running, power on
the router.
Using the Console
The Console Program is the interface that you will be using to
configure your TW-H6W1IR. Several operations that you should be
familiar with before you attempt to modify the configuration of your
router are listed below:
? ?Moving the Cursor. Within a menu, use Tab and arrow keys
to navigate through different information fields.
? ?Moving Forward to Another Menu. To move forward to a
sub-menu below the current one, use Tab or arrow keys to
TW-H6W1IR ISDN Remote Router
Installation 17
position the cursor on the sub-menu item and press Enter to
view the selected sub-menu.
? ?Entering Information. There are two types of fields that you
will need to fill in. The first requires you to type in the appropriate
information. The second gives you choices to choose from. In the
second case, press the space bar to cycle through the available
choices. Upon configuring all fields the sub-menu, position the
cursor on SAVE and press Enter to save, or position the cursor
on EXIT to cancel.
? ?Refresh Screen. Console screens are notorious for becoming
garbled. When this happens, simply press <Ctrl> + <R> to
refresh the contents of the screen.
Step 3 - Connecting an ISDN Line to the Router
Your phone company will provide an S/T interface into your home or
office. Plug the ISDN line from the router directly into the ISDN wall
socket provided by your phone company.
Step 4 - Connecting a Telephone or Fax Machine to the Router
You can connect a regular telephone, fax machine, or modem to your
router to be used for analog calls. Note that the router’s other functions
all work the same whether you connect an analog device or not.
To connect an analog device, just plug one end of the device’s cord
into one of the sockets on the back of the router marked PHONE 1 or
PHONE 2.
TW-H6W1IR ISDN Remote Router
18 Installation
To have incoming calls directed to a device on a PHONE jack, you
must enter the telephone number for the phone in the console program
under the Interface Configuration, ISDN submenu.
Step 5 - Connecting Ethernet Cables to the Router
Your TW-H6W1IR has six ports for connecting 10BASE-T Ethernet
devices to form a LAN. The jacks for ports 1 through 5 are wired to let
you connect network end nodes (computers, servers, bridges, other
routers, etc.) using standard “straight-through” EIA (Electronic
Industries Association) Category 3 or higher twisted-pair cables. The
jack for the sixth port is labeled Uplink and is wired to let you connect
to another 10Mbps Ethernet or dual-speed hub using a straight-through
cable, or an end node using a cross-wired cable.
Please refer to the following chart when deciding on the type of cable
necessary for a given connection:
DEVICE PORT
USED
DEVICE BEING
CONNECTED
PORT
TYPE
CABLE TO USE
Hub or
Norma
l
Crossover (X)
Norma
l
Switch
Uplink Straight-Through (||)
Router Server (or PC) Straight-Through (||)
Hub or
Norma
l
Straight-Through (||)
Uplink
Switch
Uplink Crossover (X)
Server (or PC) Crossover (X)
TW-H6W1IR ISDN Remote Router
Installation 19
The figure below shows how to make an Ethernet connection between
the router and a network end node.
Important Notes on Ethernet Connections
Observe the following rules when connecting devices with twisted-pair
Ethernet cables:
? ?For both end-node and uplink connections, use only EIA
Category 3 or higher-grade twisted-pair data cables with RJ-45
plugs. In almost all cases, only standard straight-through cables
are needed.
? ?Make sure no cable is more than 100 meters (328 feet) long.
? ?When uplinking two hubs together with a straight-through cable,
use an uplink-type jack at one end, and an end-node-type jack
at the other.
TW-H6W1IR ISDN Remote Router
20 Installation
? ?If uplinking more than two hubs together, observe the 5-4-3 rule:
no signal, in order to go from one end node to another, must ever
pass through more than five twisted-pair cables, four repeaters
(that is, hubs), and three uplink cables. This is the maximum signal
path in twisted-pair Ethernet. Also be sure never to allow a signal
loop to form.
Note that you can connect an end node through the Uplink jack,
but to do so you must use a cross-wired cable or cable
converter.
Step 6 - Powering Up Devices for Initial Configuration
Plug in the included 18V DC, 750 mA power adapter into the power
jack on the router’s rear panel.
TW-H6W1IR ISDN Remote Router
Installation 21
You should have now connected the RS-232 cable to the console, the
ISDN phone line, one or more Ethernet cables, and the power adapter.
At this point in the installation process you can now power up the
console computer, run the terminal emulation software (if necessary),
and then power up the TW-H6W1IR.
Step 7 - Initial Configuration of the Router
After the console is properly connected and both devices are powered
on as described in the preceding sections, you should see the router run
through the power on self test (POST). Finally, it will arrive at the logon
screen shown below. If the login screen does not appear, press <Ctrl>
+ <R> to refresh the screen.
TW-H6W1IR ISDN Remote Router
22 Installation
To log on to the router, use the factory set username and password
‘Admin’ (without the quotes). Please note that the user name and
password are case-sensitive.
Upon entering the username and password (using the <tab> key to
jump to the next field), position the cursor on OK and press <Enter>.
You will then see the following Main Menu:
Step 7 - Configuring the LAN Port
Preparing the router for connection to a LAN only requires enabling the
LAN port, enabling IP networking, assigning the LAN port an IP
address and enabling telnet (if necessary). After the LAN port is
configured, all other features on the router can be configured remotely
through the LAN by using the included Windows-based Router
Configuration Utility or Telnet. Regardless, the router can always be
configured using a console connected to the RS-232 Console port.
To configure the LAN:
TW-H6W1IR ISDN Remote Router
Installation 23
1. The LAN port must be enabled in the Interface
Configuration sub-menu.
? ?Choose Interface Configuration, LAN.
? ?Position the cursor over the State item and press <space
bar>. The State will change from Disable to Enable.
? ?Position the cursor on the Save option at the bottom of the
screen and press <Enter> to save the new setting.
? ?Choose Exit in the sub-menus to return to the Main Menu.
2. Enable IP Networking
? ? Choose Network Configuration, IP
Configuration.
? ? Position the cursor over the last item IP Networking
and press <space bar> to Enable it.
? ? Position the cursor on the Save option at the bottom of the
screen and press <Enter> to save the new setting.
3. Assign an IP address to the LAN port in the Network
Configuration sub-menu of the Main Menu.
? ?Still in Network Configuration, IP
Configuration submenu from Step 2 above, choose IP
Stack Configuration, LAN.
? ?Enter a valid IP address for the LAN in the first item. You may
also enter a Netmask if you wish. For more information about IP
TW-H6W1IR ISDN Remote Router
24 Installation
Addresses and Subnet masks, please refer to Appendix B – IP
Concepts.
? ?Position the cursor on the Save option at the bottom of the
screen and press <Enter> to save the new setting.
? ?Choose Exit in the sub-menus to return to the Main Menu.
4. Enable the Telnet/Discovery function on the router.
? ? From the Main Menu choose Advanced Functions.
? ? Choose the Telnet/Discovery Enable option and
enable telnet.
? ?Position the cursor on the Save option at the bottom of the
screen and press <Enter> to save the new settings.
? ?Choose Exit in the sub-menus to return to the Main Menu.
The router can now be accessed via the LAN by Telnet, the Web-
based TW-H6W1IR Router Configuration Utility (included with the
router) and other SNMP management applications.
If you have any questions regarding the settings you made or other
settings in the submenus, please refer to the next chapter
Configuration and Management.
Step 8 Plugging in All Devices
You can now plug in and power on all other devices connected to the
router. Do not power on the router yet.
TW-H6W1IR ISDN Remote Router
Installation 25
The router is now able to use the LAN ports.
The router must be further configured in order to get the built-in ISDN
modem to function properly, to perform other routing functions, and to
manage your IP network. This can now be done by using the console,
the included Web-based Configuration Utility or Telnet.
For more information about configuring or managing the router, please
refer to the next chapter Configuration and Management.
TW-H6W1IR ISDN Remote Router
26 Configuration and
Management
Configuration and Management
After the initial startup (POST) test, the router will prompt you for login
and password. This is the opening page of the router’s out-of-band
configuration program, called the Console program. The Console
program is stored in the Flash memory chips in the router and the
settings are written in EEPROM chips in the router. It is the most basic
level for configuring and managing the router and the network to which
it is connected.
If you’re starting the router for the first time, the default login and
password is “Admin the login and password are case-sensitive,
alphanumeric characters.
TW-H6W1IR ISDN Remote Router
Configuration and Management 27
Note that once you are in the Main Menu, if there is no activity for
more than 5 minutes, the router will automatically log you out. Your
first endeavor should be to increase the ‘timeout’ time by adjusting the
appropriate value in the System Information sub-menu.
The router can also be configured remotely through a LAN or ISDN
connection by using the included Router Configuration Utility or Telnet.
However, if you wish to do this, the console program must first be used
to initially configure the relevant port on the router. Please see Step 7 -
Initial Configuration of the Router on page 21 of this manual for
more detailed information.
Console Program Main Menu
The Main Menu is shown below.
TW-H6W1IR ISDN Remote Router
28 Configuration and
Management
As mentioned earlier, your first endeavor should be to increase the
automatic timeout. Enter the System Information to do this. You will
see this screen:
System Information
This menu contains administrative and system-related information.
The above parameters are described as follows:
?? System Descriptionthis is a non-changeable, short description
of the product.
?? System Object IDthis is the enterprise-specific MIB Object ID
indicating this type of router.
TW-H6W1IR ISDN Remote Router
Configuration and Management 29
?? System Up Time shows how long the router has been running
since the last power off or reset.
?? System Contact – enter the name of the department or individual
responsible for maintaining the router.
?? System Namegive the router a descriptive name for
identification purposes.
?? System Locationenter the geographic location of the router.
?? Console/Telnet Display Timeout in Minutes this is a security
measure to automatically logoff from the console menu after a given
idle time. Enter a timeout time between 0 and 90 minutes. Zero
specifies no timeout.
?? System MAC Address –the physical address of this router.
?? ISDN Switch Type the type of ISDN switch used by the
telephone company that the TW-H6W1IR can communicate with.
The TW-H6W1IR currently supports only the DSS1 switch type.
TW-H6W1IR ISDN Remote Router
30 Configuration and
Management
Interface Configuration
Under Interface Configuration in the main menu is the following
interface configuration screen, used to configure the LAN and ISDN
interfaces:
TW-H6W1IR ISDN Remote Router
Configuration and Management 31
LAN Sub-menu
The parameters are described below:
?? Description this is a user-defined, 32-character identifier used to
name the LAN.
?? Operation Mode The LAN port is 10BASE-T only.
?? State this is a toggle, to disable or enable the LAN interface.
TW-H6W1IR ISDN Remote Router
32 Configuration and
Management
ISDN Sub-menu
The parameters are described below:
?? Description this is a user-defined, 32-character identifier used to
name the ISDN.
?? Switch Type this parameter defines the type of ISDN service
used. Currently, the TW-H6W1IR only supports DSS-1 type
ISDN lines.
?? B1 and B2 Channel Usage this defines whether the ISDN line is
a leased line or a normal switched line. If you are not using a leased
line connection, set this item to Switch.
?? Country ID this field needs to contain the country parameter.
Without this information, the router cannot establish a connection. A
list of country ID numbers is located in Appendix E Country ID
Numbers.
TW-H6W1IR ISDN Remote Router
Configuration and Management 33
?? ISDN Data this field must contain the incoming telephone
number for data calls. In other words, it is your ISDN line’s data
phone number.
?? A/B Adapter 1 and 2 enter the telephone numbers for your
voice/analog lines.
?? Phone 1 and 2 Call Waiting If you have applied for and
received call waiting capabilities for your ISDN voice lines, you
must enable these settings in order for the call waiting feature to
function.
There are 4 special operations for using call waiting (flash means a
very brief hanging up of the phone. In other words, for the first
option below, flash 0, click the hang up button on your phone very
quickly and then press the number 0 on your telephone’s keypad):
Flash 0 disconnect the first phone call established.
Flash 1 disconnect the second phone call established.
Flash 2 switch between the two phone calls.
Flash 3 speak to both parties simultaneously (if conference calling
is enabled by your phone company).
?? POTS Lines [Plain Old Telephone Service]. Enables or disables
phone calls on the Phone 1 and Phone 2 jacks on the rear of the
router.
?? Global Reception When this is enabled, the Phone 1 and Phone
2 jacks will receive all phone calls directed to them by the
telephone company’s switch. When disabled, the router will check
incoming calls to the Phone 1 and 2 jacks against the telephone
numbers specified in the A/B Adapter 1 and 2 fields above.
TW-H6W1IR ISDN Remote Router
34 Configuration and
Management
?? Block Outgoing CLID When this is enabled, your ISDN data
phone number and voice phone numbers will never be sent out
when trying to establish a connection. Thus, even if sites being
called have Caller ID, they still won’t be able to know your phone
number.
?? Auth[entication] Type this defines the authorization protocol
that will be used when accepting a dial-in connection. The choices
are Password Authentication Protocol [PAP], Challenge
Handshake Authentication Protocol [CHAP] or None. PAP and
CHAP do not provide a screen for users to manually enter their
Username and Password instead, this data must be entered into
the dialing software before placing the call. Make sure the device
dialing in is using the same protocol as defined here. The None
setting may be used when you do not wish dial-in users or networks
to identify themselves or be subject to security.
?? Call Bumping This setting only takes effect when both B
channels are connected and using multi-link PPP. If this is the case
and call bumping is enabled, when you receive and incoming voice
call, the second B channel will be dropped (with all traffic being
moved to the first B channel) and the voice call will be received. If
disabled, both B channels will continue their data transmissions
uninterrupted and the voice call will be ignored.
?? Stateenables/disables the ISDN port.
TW-H6W1IR ISDN Remote Router
Configuration and Management 35
Network Configuration
IP protocol configuration and static routes are configured in the
Network Configuration sub-menu. This menu is shown below:
IP Stack Configuration
The network interface IP address, mask and protocols are specified in
the IP Stack Configuration submenus. Below, the submenus for both
the LAN and ISDN interfaces are shown.
TW-H6W1IR ISDN Remote Router
36 Configuration and
Management
The parameters are described below:
?? IP Address – this is the IP address for the router on the network
to which this interface is connected.
?? Netmask this is a 32-bit bit mask that shows how the IP address
is to be divided into network, subnet and host parts. The netmask
TW-H6W1IR ISDN Remote Router
Configuration and Management 37
has ones in the bit positions in the 32-bit address which are to be
used for the network and subnet parts, and zeros for the host part.
The mask should contain at least the standard network portion (as
determined by the address's class), and the subnet field should be
contiguous with the network portion.
?? Forwarding (LAN) this enables or disables communications
between this router and other router(s) on the LAN.
?? State (ISDN) this is a link method between this interface and
adjacent router(s). The methods are described:
1. AUTO this obtains and utilizes the IP address assignment
from your ISP (Internet Service Provider).
2. DISABLE – this disables this interface.
3. IP STACK this enables this interface, and the IP address
used will be the value of the parameter, IP Address.
4. UNNUMBER this utilizes a method of connecting this router
with adjacent routers, without having to define an IP network
prefix between them. The adjacent routers must have
UNNUMBER capability too.
?? Routing Protocolthis is a distance vector routing protocol. RIP
is an Internet standard Interior Gateway Protocol defined in RFC
1058 and RFC 1723. Routing information is sent periodically
(each 30 seconds, or triggered by topology change) to an adjacent
router. The adjacent router must be using the same protocol.
Setting this to RIPV1&V2 will give the router the ability to make
routing information exchanges with any adjacent router.
TW-H6W1IR ISDN Remote Router
38 Configuration and
Management
?? Routing Mode this parameter allows the router to specify the
extent to which it partakes in the RIP on this port. The options are
described below:
1. None the router will not participate in any RIP
exchange with adjacent routers.
2. Listen the router will incorporate routing information
from adjacent routers, but will not send its own routing
table.
3. Talk the router will send adjacent routers its own
routing table, but will not incorporate routing information
from them.
4. Both the router will incorporate routing information
from adjacent routers, and will send adjacent routers it’s
own routing table.
?? IP Multicastingthis feature enables or disables the router’s
ability to route IP Multicast packets from one interface to another
(for example, from the LAN ports to the ISDN port). IP
Multicasting is a bandwidth-saving method for transmitting data to
more than one host. IP Multicasting is often used when
sending/receiving audio or video data. When IP Multicasting is
enabled, the router will search its multicast forwarding table and
depending on the result of the search will either forward the packet
or add the group to the table.. If IP Multicasting is disabled, all
multicast packets received by the router will be dropped, effectively
limiting multicasting to the LAN. The router can also perform
DVMRP if this feature is enabled (see Multicast Protocol below),
which allows the TW-H6W1IR to share multicast information with
other routers, enabling IP multicasting over the ISDN port.
TW-H6W1IR ISDN Remote Router
Configuration and Management 39
?? Multicast Protocol – if this parameter is set to None, the router
will only use the Internet Group Management Protocol (IGMP), if
IP Multicasting is enabled above. This effectively limits multicast
data to the local network. If set to DVMRP (Distance Vector
Multicast Routing Protocol), the router will also use this protocol to
share its multicast information with other routers (much like RIP), in
effect, enabling multicasting on the WAN (ISDN) port.
?? IGMP Version configures the router to use either IGMP version
1 or 2. A major difference between the two is that version 2 allows
the router to communicate multicast information with other routers
(via the ISDN port), even if the other router isn’t using DVMRP.
?? DHCP Client (LAN) this feature allows the LAN port to be
assigned an IP address from a DHCP server other than the one in
the router. This feature should be enabled only for special
configurations (such as the presence of a cable modem on the
LAN) where you wish the router to work with a device on the
network that must act as a DHCP server. Otherwise, this feature
should be kept disabled.
?? RIP Spoofing (ISDN) this feature should only be enabled if you
have more than one router on your network and this router is
providing your WAN connection. In this case, if the WAN
connection is dropped due to inactivity and this feature is enabled,
RIP packets will be sent to the other routers on the network telling
them that data can still be sent to the WAN via this router.
Otherwise, the other routers will learn that the WAN link has been
disconnected and will no longer forward packets destined for the
WAN to this router, causing the packets to be dropped before
Bandwidth on Demand has a chance to reestablish the WAN
connection.
TW-H6W1IR ISDN Remote Router
40 Configuration and
Management
IP Static Route
A static route is a permanent entry in the routing table. Static routing
provides a means of explicitly defining the next hop router for a
particular destination network IP address. Each static route entry also
allows for a metric (a.k.a. hop count) to be specified.
The parameters are described below:
?? IP Address this specifies the destination network IP address (or
a host, depending on the netmask) and pairs it with a gateway.
?? Netmask this mask shows how the destination IP address is to
be divided into network, subnet and host parts. The netmask has
ones in the bit positions in the 32-bit address which are to be used
for the network and subnet parts, and zeros for the host part.
?? Gateway this is the adjacent next hop router, for which the
packets, arriving to this router with this destination IP address, will
be forwarded.
TW-H6W1IR ISDN Remote Router
Configuration and Management 41
?? Hops this is an associated RIP metric that may have its value set
between 1 and 15, inclusive. A metric value higher than 15 (such
as 16) means that the network is unreachable.
?? Intf [Interface] this is the network interface containing the
gateway that the packets will be forwarded through.
?? State this enables/disables a particular entry.
IP Static Route Examples
The IP Static Route Table shown in the example IP Static Route screen
above has the first three entries configured for common implementations
of static routing.
The first entry assumes that ISDN1 has a connection to the Internet and
defines the default next hop router. If you use this router to connect to
the Internet it is very important that you create an entry here that defines
the default next hop router as your ISP. This configuration is also
commonly used when RIP exchanges with other Internet routers (on
ISDN1) are disabled.
The second entry shows how to configure static routes when there is
another router on the LAN. The IP Address shown (202.12.125.0) is
the network address for a branch office, for example. The Gateway
Address (210.172.23.1) is the IP address to the LAN port on another
router on the LAN that maintains an ISDN connection to the branch
office.
The third entry is an example of an enterprise ISDN connection
(through telephone lines) to another router, at a branch office for
example. The IP Address is the network address of the branch office.
The Gateway Address is the IP Address of the ISDN port on the
TW-H6W1IR ISDN Remote Router
42 Configuration and
Management
branch office router. This configuration assumes there is a modem on
ISDN2 maintaining a dial-up connection to the branch office.
IP Networking
Under the IP Configuration sub-menu, the IP Networking function can
toggle to connect/disconnect this router from the entire IP network.
When IP Networking is disabled, all routing functions are stopped. The
only IP Address the router will act on is its own, via Telnet for example.
Router Advertisement
When this option is enabled, the router will periodically send out ICMP
packets that announce itself on the network. These ICMP packets are
utilized by the Windows 98 or later operating system, which will
automatically update the default gateway setting on the computer in
which it is installed.
50


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