Table 31 X.21 Cable Pinouts - Nortel Contivity 2600 Install Manual

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 31
individual wire within a twisted pair.)

Table 31 X.21 cable pinouts

Standard-wired
end 28-pin male
2
14
3
16
15
12
17
9
24
11
4
19
5
13
6
22
20
23
8
10
18
21
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
CTSA
CTSB
DSRA
DSRB
DTRA
DTRB
DCDA
DCDB
LL
RL
Appendix A Technical specifications 203
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
pair 7A
pair 7B
pair 8A
pair 8B
pair 9A
pair 9B
pair 10A
pair 10B
pair 11A
pair 11B
Nortel VPN Router Installation — Hardware Options
Standard-wired
end 15-pin male
2
9
4
11
6
13
pair 5A
pair 5B
pair 4A
pair 4B
3
10
5
12
no conn
no conn
no conn
no conn
no conn
no conn
no conn
no conn
Notes
Note 1
Note 1
Note 1
Note 1
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2