IBM SY44-5902-05 manual Communications adapter cable, 21/High speed communications adapter cable

Table 77. V.36/RS-449 advanced cable wrap connector wiring (continued)

Signal destination	Wrap connector pin to pin
SC-GND to RC-GND	37 to 20

X.21 communications adapter cable

Table 78. X.21 Communications Adapter Cable

Signal designation	Adapter connector pin number	DCE connector pin number
Transmitted data A, B	2, 4	2, 9
Received data A, B	3, 5	4, 11
Control A, B	20, 23	3, 10
Indication A, B	6, 15	5, 12
Signal element timing A, B	17, 8	6, 13
Cable ID bit 2, common return	7, 10	8

Note: Cable ID 2 is connected to common return pin 7 only at the DTE connector end and is not connected at the DCE end.

X.21/High speed communications adapter cable

Table 79. X.21/High speed communications adapter cable

Signal designation	Adapter connector pin number	DCE connector pin number
Transmitted data A, B	18, 34	2, 9
Received data A, B	37, 20	4, 11
Control A, B	36, 35	3, 10
Indication A, B	38, 39	5, 12
Signal element timing A, B	12, 29	6, 13
Cable ID bit 2, common return	49, 7	8

Note: Cable ID 2 is connected to common return pin 7 only at the DTE connector end and is not connected at the DCE end.

X.21 cable wrap connector wiring

Table 80. X.21 cable wrap connector wiring

Signal designation	Wrap connector pin to pin
Transmit data A to receive data A, signal timing A	2 to 4, 6
Transmit data B to receive data B, signal timing B	9 to 11, 13
Control A to indicate A	3 to 5
Control B to indicate B	10 to 12

X.21 advanced PCI communications cable

Table 81. X.21 advanced PCI communications cable

Signal designation	Adapter connector pin number	DCE connector pin number
Transmitted data A (TD-A)	13	2

Chapter 9. System Architecture and Configuration 263