Asus ISDNLink INET-800 User manual

ISDNLink
INET-800
ISDN Router
User’s Guide

FCC Statement:
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:
(1) This device may not cause harmful interference.
(2) This device must accept any interference received, including interfer-
ence that may cause undesired operation.
CE Marking Warning
This is a Class A product. In a domestic environment this product may cause radio
interference in which case the user may be required to take adequate measures.
Copyright 1998. All Rights Reserved.
Document Version: 1.0
All trademarks and trade names are the properties of their respective owners.

i
TABLE OF CONTENTS
CHAPTER 1 ABOUT YOUR INTERNET ROUTER........................................... 1
Internet Router Features................................................................................. 1
Requirements................................................................................................... 4
Package Contents............................................................................................. 4
LED Indicators................................................................................................ 5
Rear Panel Connectors & Switches................................................................. 5
DIP Switches.................................................................................................... 6
Reset The
Device………………………………………………………………….6
CHAPTER 2 SETUP: INTERNET ROUTER....................................................... 7
Overview.......................................................................................................... 7
Hardware Installation ..................................................................................... 7
Internet Router Configuration........................................................................ 8
Web Browser Configuration ........................................................................... 8
Home Setup Screen.........................................................................................11
Configuration Utility ......................................................................................15
Quick Setup
Screen……………………………………………………………..17
Status
Screen…………………………………………………………………….21
Password
Screen………………………………………………………………...25
LAN
Screen……………………………………………………………………...27
Dial-In Access
Screen…………………………………………………………...30
Access Control
Screen…………………………………………………………..34
Internet Application Screen……………………………………………………39
LAN-to-LAN Screen……………………………………………………………46
ISDN Screen…………………………………………………………………….50
CHAPTER 3 PC CONFIGURATION……………………………………………..55
PC Configuration……………………………………………………………….55
Operation -Internet Access……………………………………………………56
CHAPTER 4 ADVANCED FEATURES...............................................................59
Available Options ...........................................................................................59

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CHAPTER 5 ROUTING .....................................................................................641
Overview.......................................................................................................641
Router Configuration .....................................................................................61
Routing Example............................................................................................62
Routing Table
Entries…………………………………………………………..64

iii
About Internet Router
CHAPTER 6 STATUS & MONITORING............................................................67
Overview.........................................................................................................67
Status Screen...................................................................................................67
APPENDIX A TROUBLESHOOTING..................................................………...70
APPENDIX B SPECIFICATIONS........................................................................73

1
Chapter 1
About Internet Router
This Chapter provides an overview of the Internet Router's
features and capabilities.
The Internet Router allows multiple SOHO (Small Office Home Office) users to
share a single Internet user account (IP address) over an ISDN phone link. It
provides a low-cost method of giving users of your network easy access to the vast
resources available on the Internet.
Figure 1: Office to Internet
Internet Router Features
The Internet Router incorporates many advanced features, carefully designed to
provide sophisticated functions while being easy to use.
LAN Features
Ø10/100 BaseT Support. The LAN connection will auto-detect 10BaseT and
100BaseT connections
ØDHCP Server Support. Dynamic Host Configuration Protocol provides a
dynamic IP address to PCs and other devices upon request.
The Internet Router can act as a DHCP Server.
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Internet Router User Guide
ØMulti Segment LAN Support. If you have a Router, PCs on other LAN
segments can use the ISDN Internet Router to access the Internet. A static rout-
ing table is provided to support multiple routers if needed.
Internet Access Features
ØShared Internet Account. All users on the LAN can share the same Internet
Account (IP address).
ØDial-On-Demand & Auto-Disconnect. A connection is established to the
Internet as required, and automatically disconnected when no longer needed.
This reduces on-line charges to the minimum possible level.
ØPPP Authentication. This is used to validate the log-on to your Internet
Service Provider.
ØAdvanced Internet Functions.
üVirtual Servers. This feature allows Internet users to access Internet serv-
ers on your LAN. The required setup is quick and easy.
üUser-Defined Virtual Servers. Internet users can access non-standard
Internet Servers on your LAN by using this feature.
üSpecial Internet Applications. Internet applications such as Internet Vid-
eoconferencing, Telephony, Games Servers, and other special-
purpose Servers are supported.
üExposed Computer. One (1) PC on your local LAN can be exposed to the
Internet. This allows unrestricted 2-way communication be-
tween this PC and servers or users on the Internet.
ISDN Features
ØEasy Configuration. No complex technical data or unintelligible prompts.
You’ll be finished in minutes!
ØIntelligent B Channel Utilization. Internet access will automatically switch
between 1 or 2 B channels, depending on the volume of data.
ØOutgoing call ID. The Internet Router supports Outgoing call ID for both
MSN (Multiple Subscriber Numbering) and SAD (Sub Address).

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About Internet Router
Configuration & Management
ØEasy Setup. Use your WEB browser from anywhere on the LAN for configu-
ration.
ØRemote Management. The Internet Router can be managed, if required,
from a workstation anywhere on the LAN, using a WEB browser. A friendly
utility in MS Windows does the advance setup to achieve functions and per-
formance.
ØRemote Monitoring. Internet access via the ISDN link, can be monitored
from any workstation on the LAN.
Advanced Functions
ØDial-in Remote Access. Remote users can dial in using their ISDN phone line,
and use the ISDN Internet Router to connect to the LAN and access LAN re-
sources..
ØLAN-to-LAN Connectivity. Using 2 ISDN Internet Routers, 2 LANs can be
connected via the ISDN link. The ISDN Internet Router will dial the remote
LAN whenever required. Operation is completely automatic and transparent.
Security Features
ØConfiguration Data. Optional password protection is provided to prevent
unauthorized users from modifying the configuration.
ØFirewall Protection. All incoming data packets are monitored and all
incoming server requests are filtered, thus protecting your network from mali-
cious attacks from external sources.
Firewall Protection
The firewall protection provided by the Internet Router is an intrinsic side
effect of IP sharing. All users on the LAN share a single external IP ad-
dress. From the external viewpoint, there is no network, only a single
device.

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Internet Router User Guide
For internal users, the Internet Router acts as a “transparent proxy server”,
translating the multiple internal IP addresses into a single external IP ad-
dress.
For external requests, any attempt to connect to local resources are blocked.
The Internet Router will not “reverse translate” from a global IP address to
a local IP address.
This type of “natural” firewall provides an impregnable barrier against ma-
licious attacks.
Requirements
•PCs with Ethernet Network cards and 10/100 BaseT connectors
•10/100 BaseT network
•ISDN line, fitted with a NT-1 (Network Termination 1) termination and RJ45
sockets for S/T connection.
•Internet Access account with a local ISP (Internet Service Provider).
Package Contents
The following items should be included:
•The Internet Router Unit.
•Power Adapter.
•One (1) 1.44M floppy disk or CD, containing the configuration utility.
•Quick User’s Manual.
•ISDN cable
If any of the above items are damaged or missing, please contact your dealer as
soon as possible.

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About Internet Router
LED Indicators
A Power Lights when power is ON.
B LAN LNK –ON when a LAN connection is established. Flash
while data traffic is on the LAN.
ERR –Indicates an error, but normally lights up briefly
during power On.
LAN –ON when a LAN connection is established.
C ISDN B1 –ON when a B1 channel is established. Flash while the
B1 channel is in use.
B2 –ON when a B2 channel is established. Flash while the
B2 channel is in use.
LK –ON while the ISDN control signal is established.
All 7 LEDs will light briefly on power on. This is normal.
Rear Panel Connectors & Switches
1 Power port Connect the power adapter here. Use only the unit
provided. (12VDC, 1Amp)
2 10/100BaseT
ports Connect 10/100 BaseT cabling here, and the other
end to the PC.
3 DIP switches See the following section.
4 ISDN port Use a cable with RJ45 connectors to link this port
to the S/T interface on the NT-1.

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Internet Router User Guide
DIP Switches
Settings Description
SW1 SW2 SW3 SW4 SW5
Off Off Normal operation
Off On Disable DHCP server2
On Off Restore defaults IP address3
On On
Reserved1
ISDN Term
i-
nator
ISDN Term
i-
nator
Reserved
1Do not change the default values unless advised to do so by technical support staff.
2This will override the setting on the DHCP Server screen.
3Restores the default IP address (192.168.0.1), network mask (255.255.255.0) and
clears the password, provided the following procedure is carried out.
If you merely leave the DIP switches is this position, the Internet Router will
function normally.
ISDN Terminators: Please leave them as default.
Reset the device
If the Internet Router's IP Address or password is lost, the following procedure can
be used to recover from this situation.
1. Turn the power to the Internet Router OFF.
2. Set DIP switch 1 ON, and DIP switch 2 OFF.
3. Turn the power to the Internet Router ON.
4. Operate DIP switch 1 in the following sequence (you have 15 seconds to
complete the sequence):
•OFF, ON, OFF
5. The Internet Router will now reset, and the Red LED will flash. The following
changes will have been made. (Other configuration data is unchanged.)
•IP Address set to its default value of 192.168.0.1
•Network Mask set to 255.255.255.0
•The password cleared (no password).

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About Internet Router
6. You can now connect to the Internet Router and make any configuration
change required.

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Chapter 2
Setup:
Internet Router
This Chapter explains how to install and configure the Internet
Router for Internet Access.
Overview
Setup involves:
•Hardware Installation
•Internet Router configuration
•PC configuration
Hardware Installation
1. Connect Network Cables
•Use standard UTP network cable, with RJ45 connectors, to connect the ISDN
Internet Router to a 10BaseT or 100BaseT hub.
•The ISDN Internet Router will auto-detect the network speed (10M or 100M)
and full/half duplex mode.
2. Connect ISDN Phone Line
Using a cable fitted with RJ45 plugs, connect the ISDN port on the Internet Router
to the S/T interface on the ISDN NT-1 (Network Termination 1).
3. Power On and Check the LEDs
Connect the supplied power adapter to the Internet Router. When the Internet
Router is powered On, all LEDs should blink, then, except for the PWR LED, go
off. If LAN and ISDN connection is working fine, the LNK and LK leds will stay
ON.
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9
Setup: Internet Router
If the ERR LED stays on, or both the ERR and LNK LEDs continue to blink, there
is a hardware problem.
Warning!
Only use the power adapter provided. Using a different one
may cause hardware damage.
Internet Router Configuration
There are two methods to configure the Internet Router, one is using web browser
and the other is using utility working in Win95/98/NT. The browser configuration
provides a quick start configuration (only one screen) and an extra utility provides
more powerful configuration for users. But first of all, please make sure that the
default IP address, 192.168.0.1 is used by Internet Router ONLY at the first stage
until you change it to another one after configuration.
Web Browser Configuration
Preparation
Ensure Internet Router is in the LAN, your PC is using the TCP/IP protocol, and
configure PC to use the Internet Router’s DHCP server, as follows:
DHCP Client Setup -Windows 95/98 and use Internet Router
DHCP server
1. Select the Network Neighborhood icon on the desktop, then Properties. You
will see a screen like the one below: (Start -Settings -Control Panel –Network)

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Internet Router User Guide
Figure 2: Network Configuration tab
2. If a line like the one highlighted ("TCP/IP -> Network Card”) is not listed,
select Add-Protocol-Microsoft-TCP/IP-OK to add it.
3. Select Properties for the “TCP/IP -> Network card” entry. You will see a
screen like the following:
Figure 3: TCP/IP Properties
4. On the IP Address tab, click the radio button for “Obtain an IP address auto-
matically”, as above, then reboot. Your PC will obtain an IP Address from the
Internet Router.
If you do not want to use the DCHP Server in Internet Router:
•You may set DIP switch 2 ON to disable the DHCP server in the Internet
Router or leave it as Default (DHCP ON).
•Enter a fixed IP Address on your PC, as shown below. Please make sure it does
not conflict with other PCs in the same LAN environment.

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Setup: Internet Router
Figure 4: TCP/IP Properties –Fixed IP Address
Connecting to the Internet Router
1. Start your WEB browser
2. In the Address box, enter "HTTP://" and the IP Address of the Internet Router.
For example (using default IP Address):
HTTP://192.168.0.1
3. You will see the Home setup screen and detailed description below.
If you can't connect, check:
•The Internet Router is properly installed, LAN connections are OK,
and it is powered ON.
•Your PC and the Internet Router are on the same network segment. (If
there is no router, this must be the case.)
•If another PC or device is using the same IP address (192.168.0.1) as
the Internet Router, turn the other device OFF until you assign a new
address to the Internet Router.
•That your PC has a compatible IP address (either static or obtained as a
DHCP client)
•In the Windows 95/98/NT “Run” dialog, enter:
winipcfg
•Ensure that the drop-down list is set to your Network card. The
current IP Address and Network mask (Subnet Mask) will be dis-

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Internet Router User Guide
played.
•The IP address must be in the range 192.168.0.2 to 192.168.0.254,
and the Network mask must be 255.255.255.0
•Ensure that your PC is NOT configured to use a “Proxy Server”. In
Internet Explorer, this can be checked using View –Internet Options -
Connection. In Netscape, check Options –Network Preferences –Prox-
ies.