3Com ISDN Modem manual To install the 3C882 Isdn modem serial cable

2-4 CHAPTER 2: INSTALLING THE 3C882 ISDN MODEM

To install the 3C882 ISDN modem serial cable:

1Insert the 25-pin male end of a serial signal cable into the RS-232 serial port on the 3C882 ISDN modem’s back panel and tighten the connector screws, as shown in Figure 2-4.

U

	-232	ISDN
RS

2

1

RESET

9VDC

.5A MAX

Figure 2-4 Computer to 3C882 ISDN Modem COM Port Connection

2Connect the other end of the serial cable to a serial COM port on the back of your computer and tighten the connector screws.

On a PC, most COM port connectors are labeled COM, SERIAL, or RS-232-D. On an IBM AT® PC and most laptops or notebooks, connect the cable to a 9-pin COM port connector. If your PC has a 25-pin serial port connector, you will need to install a standard 9-pin to 25-pin adapter.

On a Macintosh computer, the COM port is the mini DIN

8-pin serial connector depicted by the telephone handset.