
P-IBM • 18
MODEM-TO-COMPUTER CONNECTION (Serial RS232C):
At this stage of the computer evolution, this connection should be s-i-m-
p-l-e: get a DB9F (female) to DB9M (male) cable from your favorite
computer supplier, hook your Modem to the desired serial port of your
computer...and be done with it.
If you need or want to know more, or if your computer happens to use a
DB25 serial port, please "absorb" and use well the following information
standard for all RS232C connections.
DB9 (9-pin) DB25 (25-pin)
1 DCD 8
2 RD 3
3 TD 2*
4 DTR 20*
5 GND 7*
6 DSR 6
7 RTS 4*
8 CTS 5*
9 RI 22
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