3Com CM 4000 222 CM 4000 Installation and Operating Manual

Hardware Installation
2−22 CM 4000 Installation and Operating Manual
1
6
Rx−
2
7
3
Tx−
8
4
9
5
to CM 4000
Serial port
DB9P
(male) RJ45P
(male)
Rx+ Receive plus
Rx− Receive minus
Tx+ Transmit plus
Tx− Transmit minus
G Ground
= Shielded, twisted pair
Rx+
Tx+
G
to Encore SC
B
RS−422 port
1
2
3
4
5
6
7
8
Tx−
Rx−
Rx+
Figure 2−25. Customer−supplied cable for
connecting redundant CM 4000s to new−style
redundant Encore SCBs (061 1000 xx series).
Tx+
G
G
1
6
Rx−
2
7
3
Tx−
8
4
9
5
DB9P
(male) RJ45P
(male)
Belden 8723 or equivalent
Rx+
Tx+
G
to Encore SC
B
RS−422 port
1
2
3
4
5
6
7
8
Tx−
Rx−
Rx+
Tx+
G
G
to CM 4000
Serial port
Software Configuration (Redundant Systems)
Software configuration for redundant systems is much the same as that already described for non−redundant systems (page
2−19), except that two CM 4000s and two CM serial ports are configured.