User manual
Table Of Contents
- Table of Contents
- About This Guide
- Introduction
- ISDN LAN Modem Functionality Description
- Hardware Description and Installation
- Setting Up TCP/IP for Windows and Macintosh
- Configuring the ISDN LAN Modem
- Advanced Configuration
- Before you Begin
- Setting Up Additional Service Providers
- Editing Service Provider Profiles
- Restricting Workstations from Accessing Service Provider(s)
- Configuring Your LAN Parameters
- Changing Data Call Parameters
- Changing Voice Call Routing
- Reserving DHCP Addresses
- Selective Password Protection
- Changing Your Password
- Setting Up Your ISDN Line Manually
- Locking and Unlocking the Configuration
- Configuring the ISDN LAN Modem from a Remote Location
- Supplementary Voice Call Services
- Placing, Receiving and Disconnecting Calls
- Troubleshooting and Maintenance
- Networking Primer
- What is a network?
- What is a LAN?
- What is a WAN?
- How does a LAN connect to a WAN?
- What is a LAN modem?
- What is ISDN?
- How do different devices communicate with each other?
- What is TCP/IP?
- What is an IP Address?
- What is a Subnet Mask?
- Dynamic and Static IP Addresses
- What is DHCP?
- What is DNS?
- What is NAT?
- What are numbered and unnumbered links?
- How is overall throughput determined?
- What is a network?
- Using the Custom Web Browser
- ISDN LAN Modem Factory Defaults
- ISDN LAN Modem Specifications
- Ordering ISDN Service
- If You Place Your ISDN Order Through 3Com
- If You Place Your ISDN Order Through the Telephone Company
- Supplementary Voice Features Included with U, EZ-ISDN-1, V and EZ-ISDN 1A
- Limitations of ISDN Ordering Codes U, EZ-ISDN 1, V and EZ-ISDN 1A
- What If I Already Have ISDN Service?
- Table of ISDN Ordering Code Capabilities
- Glossary
- Index
- 3Com Corporation Limited Warranty
1
I
NTRODUCTION
This chapter provides an overview of the OfficeConnect
®
ISDN LAN Modem,
referred to throughout this document as the ISDN LAN Modem.
Introduction
The ISDN LAN Modem is an easy to install, LAN to WAN modem. For the LAN, it
provides four 10BASE-T Ethernet connections— expandable to 25 connections.
Refer to Figure 1 for an example showing 10 connections by adding an 8-port
10BASE-T Ethernet hub. For WAN access, it provides a Basic Rate Interface (BRI)
ISDN port.
With the ISDN LAN Modem, small office and home office users can share remote
access to the Internet or to a remote office while continuing to network locally.
Applications
The primary application for the ISDN LAN Modem is:
■ Local networking with shared access to the Internet and/or a remote office
LAN.
Local Networking with
Access to the Internet
Users can share access to the Internet while continuing to network locally.
Figure 1
Local Networking with Access to the Internet
OfficeConnect
®
ISDN LAN Modem
Public telephone
network
Internet/Intranet
or
online service
ISDN BRI line
OfficeConnect™
ISDN LAN Modem
OfficeConnect
®
Hub 8 TPO
Alert
PWR COLLPKT COAX1234
green = link OK, off = link fail, yellow = partition
Port Status
5678
1% 2% 3% 6% 12% 25% 50%80%
Network Utilization
Office
Connect
¤
Hub
3 Com
PWR
ISDN
B1
B2
3 Com
Alert
Tx
Coll
1
2 3 4
LAN STATUS