Eia-232/x.21bis communications adapter cable, Eia-232/x.21bis cable wrap connector wiring – IBM VERSION 5 SY44-5902-05 User Manual
Page 269
Table 61. EIA-232/X.21bis communications adapter cable (continued)
Signal designation
Interchange circuit
number
Adapter connector pin
number
DCE connector pin
number
Calling indicator
125
27
22
Cable ID 1, 4 common return
102
(17, 33, 7)
7
Notes:
1
Cable ID 1, 4 is connected to common return pin 7 only at the DTE connector end and is not connected at
the DCE end.
2
The Select Standby signal (circuit 116) is not used on all EIA-232/X.21bis Communication Adapter cables.
EIA-232/X.21bis communications adapter cable
Table 62. EIA-232/X.21bis communications adapter cable
Signal designation
Interchange circuit
number
Adapter connector pin
number
DCE connector pin
number
Transmitted data
103
2
2
Received data
104
3
3
Request to send (RTS)
105
4
4
Ready for sending (CTS)
106
5
5
Data set ready (DSR)
107
6
6
Data terminal ready/connect data set
to line
108/2
20
20
Received line signal (carrier) detector 109
8
8
Data signal rate selector
111
23
23
Transmitter signal element timing
(DTE)
113
24
24
Transmitter signal element timing
(DCE)
114
15
15
Receiver signal element timing
(DCE)
115
17
17
Select standby
2
116
11
11
Calling indicator
125
22
22
Cable ID 0, 3 common return
102
(1, 7, 13)
7
Notes:
1
Cable ID 0, 3 is connected to common return pin 7 only at the DTE connector end and is not connected at
the DCE end.
2
The Select Standby signal (circuit 116) is not used on all V-24 Communication Adapter cable assemblies.
EIA-232/X.21bis cable wrap connector wiring
Table 63. EIA-232/X.21bis cable wrap connector wiring
Signal designation
Wrap connector pin to pin
Transmit data to receive data
2 to 3
RTS to CTS
4 to 5
DTR to DSR, calling indicator
20 to 6, 22
Chapter 9. System Architecture and Configuration
255