
Standard Synchronous Cables
114072-A Rev. C 6-51
50-Pin to X.21 (Order No. 7936)
Industry Interface Type: X.21 (V.11)
Bay Networks Termination Remote Termination
Signal Pin # to Pin # Signal
Send Data + 2 2 Transmitted Data A
Send Data - 27 9 Transmitted Data B
Request to Send + 4 3 Control A
Request to Send - 29 10 Control B
Receive Data + 3 4 Receive Data A
Receive Data - 28 11 Receive Data B
Data Carrier Detect + 9 5 Indication A
Data Carrier Detect - 34 12 Indication B
Timing + 10 6 Timing A
Timing - 35 13 Timing B
Frame Ground 1 1 Frame Ground
Signal Ground 7 8 Signal Ground
Internal Wire Connections
Pin 46 > 48 (GRD)
Pin 38
> 40
Pin 14 > 15
15 ft
(4.57 m)
Pin 8
Pin 1
Pin 15
Pin 9
15-position D-sub plug with M-3 jack screws
(ground shield connected to backshell)
Pin 1
Pin 25
Pin 26
Pin 50
50-position 0.8-mm plug
(ground shield connected to internal shell)
CAB0074A
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