Nortel Contivity 5000 Installing page 114

114 Appendix A Technical specifications
Table 33 X.21 cable pinouts (continued)
Standard-wired
end 28-pin male
5
13
6
22
20
23
8
10
18
21
25
26
27
28
1
7
The following notes apply to the single X.21 cable:
1. Wires of pair 4 connect to wires of pair 5, but not to any pins in the DA-15.
2. The term "no conn" means the wire is not connected to a pin in the 15-pin connector.
3. Wires 13B and 14B connect to pin 8 in the 15-pin connector.
4. At each end, the cable shield and connector shell must connect to pin 1 of the connector.
5. Do not interconnect Shield to Signal Ground because these are separate signals.
315990-D Rev 00
Signal name
CTSA
CTSB
DSRA
DSRB
DTRA
DTRB
DCDA
DCDB
LL
RL
TM
M0
M1
M2<-SIGNAL GROUND
SHIELD
SIGNAL GROUND
Pair number
and conductor
pair 7A
pair 7B
pair 8A
pair 8B
pair 9A
pair 9B
pair 10A
pair 10B
pair 11A
pair 11B
pair 12A
pair 12B
pair 13A
pair 13B
pair 14A
pair 14B
Standard-wired
end 15-pin male
5
12
no conn
no conn
no conn
no conn
no conn
no conn
no conn
no conn
no conn
no conn
no conn
8
1
8
Notes
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 3
Note 4,5
Note 3,5