Nortel 1010 用户手册
Appendix A Technical specifications 59
Nortel VPN Router Installation — VPN Router 1010/1050/1100
provides the X.21 cable pinouts. (The pair suffix A or B refers to an
individual wire within a twisted pair.)
Table 27
X.21 cable pinouts
Standard-wired
end 28-pin male
Signal name
Pair number
and conductor
Standard-wired
end 15-pin male
Notes
2
TXDA
pair 1A
2
14
TXDB
pair 1B
9
3
RXDA
pair 2A
4
16
RXDB
pair 2B
11
15
TXCA
pair 3A
6
12
TXCB
pair 3B
13
17
RXCA
pair 4A
pair 5A
Note 1
9
RXCB
pair 4B
pair 5B
Note 1
24
SCTEA
pair 5A
pair 4A
Note 1
11
SCTEB
pair 5B
pair 4B
Note 1
4
RTSA
pair 6A
3
19
RTSB
pair 6B
10
5
CTSA
pair 7A
5
13
CTSB
pair 7B
12
6
DSRA
pair 8A
no conn
Note 2
22
DSRB
pair 8B
no conn
Note 2
20
DTRA
pair 9A
no conn
Note 2
23
DTRB
pair 9B
no conn
Note 2
8
DCDA
pair 10A
no conn
Note 2
10
DCDB
pair 10B
no conn
Note 2
18
LL
pair 11A
no conn
Note 2
21
RL
pair 11B
no conn
Note 2
25
TM
pair 12A
no conn
Note 2
26
M0
pair 12B
no conn
Note 2
27
M1
pair 13A
no conn
Note 2
28
M2<-SIGNAL GROUND
pair 13B
8
Note 3