Table 25 X.21 Cable Pinouts - Nortel 1010 Series Installing

48 Appendix A Technical specifications
Table 24 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 25
individual wire within a twisted pair.)

Table 25 X.21 cable pinouts

Standard-wired
end 28-pin male
2
14
3
16
15
12
17
9
24
11
4
19
314961-E Rev 00
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
Pair number
and conductor
pair 12A
pair 12B
pair 13A
pair 13B
pair 14A
pair 14B
Pair number
and conductor
pair 1A
pair 1B
pair 2A
pair 2B
pair 3A
pair 3B
pair 4A
pair 4B
pair 5A
pair 5B
pair 6A
pair 6B
Special-wired
end 34-pin male
NN
B
B
no conn
A
B
Standard-wired
end 15-pin male
2
9
4
11
6
13
pair 5A
pair 5B
pair 4A
pair 4B
3
10
Notes
Note 2
Note 2
Note 1
Notes 3,4
Notes 2,4
Notes
Note 1
Note 1
Note 1
Note 1