3Com ISDN Modem, User Manual

Page: 26 / 160

2-4 C
HAPTER
2: I
NSTALLING THE
3C882 ISDN M
ODEM
To install the 3C882 ISDN modem serial cable:
1
Insert 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.
Figure 2-4 Computer to 3C882 ISDN Modem COM Port Connection
2
Connect 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.
RESET
9 VDC
.5A MAX
RS-232
ISDN U
1
2