X.25 Co-Processor D-shell connectors


X.25 Co-Processor D-shell connectors

X.21 Connector 

Signal Name 37-Pin Connector 15-Pin Connector
GND
ID
T (A)
C (A)
R (A)
I (A)
S (A)
T (B)
C (B)
R (B)
I (B)
S (B)		 7
9
10
11
12
13
14
28
29
30
31
32		 8
8
2
3
4
5
6
9
10
11
12
13


X.21 bis (V.24) Connector 

Signal Name 37-Pin Connector 25-Pin Connector
TXD
RXD
RTS
CTS
DSR
GND
CD
ID
ID
DTR
RLBT
CI
TX CLK
TI
RX CLK
LLBT		 2
3
4
5
6
7
8
9
15
20
21
22
24
25
26
27		 2
3
4
5
6
7
8
7
7
20
21
22
15
25
17
18


NOTE: Pin 27 can be used as either the EIA-232 signal, HRS, or the V.24 signal, LLBT.


X.21 bis (V.35) Connector 

Signal Name 37-Pin Connector 34-Pin Connector
RTS
CTS
DSR
GND
CD
ID
RX CLK (B)
TXD (B)
TX CLK (B)
RXD (B)
DTR
CI
RX CLK (A)
TXD (A)
TX CLK (A)
RXD (A)		 4
5
6
7
8
15
16
17
18
19
20
22
34
35
36
37		 C
D
E
B
F
B
X
S
AA
T
H
J
V
P
Y
R

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