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

8
P
LACING
, R
ECEIVING
AND
D
ISCONNECTING
C
ALLS
This chapter covers the following main topics:
■ Placing calls automatically and manually
■ Receiving calls
■ Disconnecting data calls
Placing Calls
You can place calls from your computer through the ISDN LAN Modem to a
remote location either automatically by using one of the service provider
connections you set up or manually by entering the telephone number of the
destination.
3Com assumes no liability for phone charges or other expenses incurred in
connection with the use of this product.
Placing a Call
Automatically
To place a call using one of the service provider connections you set up, simply
launch the application. For example, if an ISP was configured, simply launch your
Web browser on your computer to connect to the default location configured in
your Web browser.
Telephone Number Selection for Data Calls
When you place a data call, the ISDN LAN Modem tries to use the second
telephone number assigned to your ISDN line in order to leave the first telephone
number free for voice calls. In many instances when voice services are added to an
ISDN line, they are added only to the first telephone number and not the second
telephone number. Because of this, the ISDN LAN Modem tries to use the second
telephone number, when available, for data calls.
Call Routing Among Service Providers
The ISDN LAN Modem automatically calls the first configured service provider. If
you configure a second remote connection, such as an additional ISP, and want to
use that second profile for an automatic data call, do the following.
1
Access the ISDN LAN Modem’s configuration main page.
2
Choose the Workstation graphic.
3
Select your computer.
4
Associate only the Service Provider that you want to use.