Table 21 X.21 Cable Pinouts - Nortel Contivity 600 Installing

Table 20 V.35 cable pinouts (continued)
Standard-wired
end 28-pin male
25
26
27
28
1
7
The following notes apply to the single V.35 DTE cable:
1. The term "no conn" means the wire is not connected to a pin in the 34-pin connector.
2. Wires 12B, 13A, and 14B connect to pin B in the 34-pin connector.
3. At each end, the cable shield and connector shell must connect respectively to pin A of the 34-pin connector and
pin 1 of the standard 28-pin connector.
4. Do not connect Shield to Signal Ground because these are separate signals.
Table 21
individual wire within a twisted pair.)

Table 21 X.21 cable pinouts

Standard-wired
end 28-pin male
2
14
3
16
15
12
17
9
24
11
4
19
Signal name
TM
M0<-SIGNAL GROUND
M1<-SIGNAL GROUND
M2
SHIELD
SIGNAL GROUND
provides the X.21 cable pinouts. (The pair suffix A or B refers to an
Signal name
TXDA
TXDB
RXDA
RXDB
TXCA
TXCB
RXCA
RXCB
SCTEA
SCTEB
RTSA
RTSB
Installing Hardware Options for the Contivity Secure IP Services Gateway
Appendix A Technical specifications 145
Pair number Special-wired
and conductor end 34-pin male
pair 12A NN
pair 12B B
pair 13A B
pair 13B no conn
pair 14A A
pair 14B B
Pair number Standard-wired
and conductor end 15-pin male
pair 1A 2
pair 1B 9
pair 2A 4
pair 2B 11
pair 3A 6
pair 3B 13
pair 4A pair 5A
pair 4B pair 5B
pair 5A pair 4A
pair 5B pair 4B
pair 6A 3
pair 6B 10
Notes
Note 2
Note 2
Note 1
Notes 3,4
Notes 2,4
Notes
Note 1
Note 1
Note 1
Note 1