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PERIPHERAL EQUIPMENT INSTALLATION
Local Modems
(cont.)
Workstation
Serial Port
(cont.)
Pin Number Signal Name
1 Shield (safety) ground
2 Transmit Data - from computer to
modem
3 Receive Data - from modem to
computer
4
RTS ( request to send ) - always
asserted output from computer
6 DSR (data set ready ) - input to
computer
7 Signal ground
20
DTR ( data terminal ready) -
always asserted output from
computer
Modem
Cables
Most serial modems which meet the EIA RS-232C
standard may be attached to the DIMENSION work-
station by using a "null modem" cable. The cable
must have connectors of the proper gender which
match the ports of the workstation connector box
and your modem.
The wiring for a null modem cable is shown in the
following chart:
DIMENSION Connector Printer Connector
Pin Number
Pin Number
1
1
2
3
3
2
4
8
5
8
6
20
7
7
8
4
&
5
20
6
1-32
Technical
Manual
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Troubleshooting
