Nortel 1010 用户手册
Appendix A Technical specifications 55
Nortel VPN Router Installation — VPN Router 1010/1050/1100
provides the T1/E1 CSU/DSU cable pinouts for a crossover connection.
The cable operates properly if you do not connect pins 3, 6, 7, and 8.
provides the T1/E1 CSU/DSU cable pinouts for a straight-through
connection.
Table 23
T1/E1 CSU/DSU cable pinouts for crossover connection
Standard-wired
end 8-pin male
Signal name
Pair number
and conductor
Special-wired
end 8-pin male
1
RXDA<-TXDA
wht/org pair 2A
5
2
RXDB<-TXDB
orange pair 2B
4
3
not used
wht/grn pair 3A
3
4
TXDB->RXDB
blue pair 1B
2
5
TXDA->RXDA
wht/blu pair 1A
1
6
not used
green pair 3B
6
7
not used
wht/brn pair 4A
7
8
not used
brown pair 4B
8
Caution: For crossover connections, do not use Ethernet cable. If you
use Ethernet cable the T1/E1 CSU/DSU does not work to specifications.
This condition can corrupt the data.
use Ethernet cable the T1/E1 CSU/DSU does not work to specifications.
This condition can corrupt the data.
Table 24
T1/E1 CSU/DSU cable pinouts for straight-through connection
Nortel termination
Remote termination
Signal
Pin # to Pin #
Signal
Receive A (RXDA)
1
1
Receive A (RXDA)
Receive B (RXDB)
2
2
Receive B (RXDB)
not used
3
3
not used
Transmit B (TXDB)
4
4
Transmit B (TXDB)
Transmit A (TXDA)
5
5
Transmit A (TXDA)
not used
6
6
not used