3Com 3C872 Quick Start Instructions - Page 5

Browse online or download pdf Quick Start Instructions for Modem 3Com 3C872. 3Com 3C872 16 pages. Impact isdn external digital modem

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CAUTION: The 3Com Impact digital modem is designed to

operate with Basic Rate ISDN 2B1Q U Interface network

terminations. An internal Network Termination device (NT1) is

built into the digital modem. Do not connect the 3Com

Impact digital modem ISDN port to a standard analog

telephone jack or to an external NT1 device. Make sure that it

is connected to the ISDN jack.

8 Turn on the 3Com Impact digital modem by toggling the

power switch on the back panel to the On position.

9 Turn on the computer's power switch.

10 Go to the section "Conﬁguration for IBM PC or Compatible

Computer" to conﬁgure the 3Com Impact digital modem for

your computer.

Installing the Digital Modem in an Apple Macintosh

Computer

To install the 3Com Impact digital modem in an Apple

Macintosh computer, follow these steps:

1 Turn off the computer.

2 Insert the 9-pin male end of the 3Com Impact digital

modem-to-Macintosh serial signal cable into the

connector labeled Computer on the digital modem's back

panel and tighten the connector screws.

3 Connect the other end of the 3Com Impact digital

modem-to-Macintosh serial signal cable to the serial

communications port on the back of the Macintosh.

The serial communications port is the mini-DIN, 8-pin serial

port connector, indicated on the Macintosh connector panel

by the telephone handset imprint.

4 Connect the 3Com Impact digital modem power cable to

the connector marked 12V AC on the back panel of the

digital modem.

Installing the 3Com Impact Digital Modem