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AIXLink/X.25 1.1 for AIX: Guide and Reference

X.25 Coprocessor 37-Pin Connector Pin Assignments

The following table describes the X.25 coprocessor 37-pin connector pin assignments.

X.25 Coprocessor 37-Pin Connector Pin Assignments
Pin Circuit Description Symbol X.21bis /V24 X.21bis /V35 X.21
1 Reserved



2 Transmitted data TXD x

3 Received data RXD x

4 Request to send RTS x x
5 Clear to send CTS x x
6 Data set ready DSR x x
7 Signal ground GND x x x
8 Carrier detect CD x x
9 Cable ID 0 ID0 x
x
10 Transmitted data (A) T (A)

x
11 Control (A) C (A)

x
12 Received data (A) R (A)

x
13 Indication (A) I (A)

x
14 Transmit clock (A) S (A)

x
15 Cable ID 1 ID1 x x
16 Receive clock (B) RX CLK (B)
x
17 Transmitted data (B) TXD (B)
x
18 Transmit clock (B) TX CLK (B)
x
19 Receive data (B) RXD (B)
x
20 Data terminal ready DTR x x
21 Remote loopback test RLBT x

22 Call indicate CI x x
23 Reserved



24 Transmit clock TX CLK x

25 Test indicate TI x

26 Receive clock RX CLK x

27 Local loopback test LLBT


28 Transmitted data (B) T (B)

x
29 Control (B) C (B)

x
30 Received data (B) R (B)

x
31 Indication (B) I (B)

x
32 Transmit clock (B) S (B)

x
33 Reserved



34 Receive clock (A) RX CLK (A)
x
35 Transmitted data (A) TXD (A)
x
36 Transmit clock (A) RX CLK (A)
x
37 Received data (A) RXD (A)
x
NOTES:
(a) and (b) indicate pins that are associated to form pairs.

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