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DTE - PIN Assignments and Connections (EIA 232C)
The following diagram should be used for Male/Male or Male/Female PIN
assignments and connections.
3708
Remote 25 Pin
25 Pin Male
Male or Female
Connector
Connector
Signal Name
Pin
Pin
Frame Ground
outer shield
Transmit Data
S
2
3
Receive Data
S
3
2
RTS
4
.-J
8
CTS
5
c:
DCD
8
DSR
6
20
Signal Ground
7
inner shields
7
Receive Clock
15
I
Transmit Clock
S
24
17
DTR
20
6
DTE Transmit Clock
S
24
C
15
17
•
Outer shield clamped to connector shell.
S Shielded conductor leads. Each lead is individually shielded.
All shields are connected to pin 7.
Notes:
1.
PIN positions that are not specified must not be wired.
2. All the wires should be enclosed within a shield, and this shield should be
connected to the connector housing.
3. PIN 13 must not be connected.
4. At the 3708, PINs 2, 4, 12, 14, 18, 20, 21, 23, and 24 must not be driven by the
connected equipment (modem, modem eliminator, or host).
5. PINs 18 and 23 are in IBM cables but currently are not used.
Appendix D. Cable Requirements
D-5
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