3Com ISDN Modem, User Manual

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1
I
NTRODUCTION
The 3ComImpact IQ

External ISDN Modem (referred to as the
3C882 ISDN modem throughout this guide) is an external,
stand-alone Integrated Services Digital Network (ISDN) Basic
Rate ISDN modem for connection with digital telephone
services from local telephone companies in North America.
One model (3C882) supports both IBM

or IBM-compatible
PCs and Apple

Macintosh

computers.
The 3C882 ISDN modem is designed for users who require
high-speed access to the Internet, intranet, on-line
information services, or corporate local area networks (LAN).
A typical 3C882 ISDN modem application is shown in
Figure 1-1.
Figure 1-1 Network Access with the 3C882 ISDN Modem
The 3C882 ISDN modem allows transmission of data at
speeds of up to 128 Kbps over digital ISDN connections with
3ComImpact IQ
External ISDN Modem
Internet/intranet
or
on-line service
Public telephone
network
Corporate
LAN
ISDN line
PW R TEST
D
B1
B2
SD
RD
DTR
3Com
Impact
TM
3 Com