3Com MSR 50, MSR 30, MSR 20 manual ohm-to-120-ohm adapter with BNC connector

MIM-2VE1 Module 119

Interface Cable MIM-2VE1 interface cables are G.703-compliant 120-ohm balanced twisted pair cables. At one end of the cable is a DB-15 male connector for the connection to the Router, and at the other end is an RJ-45 connector for the connection to the network.

Figure 134 E1 120-ohm balanced twisted pair cable

If the cable with the resistance of 75-ohm is needed, a 75-ohm-to-120-ohm cable adapter (one end is BNC connector and the other end is RJ-45 connector) which is illustrated in the following figure can be installed.

Figure 135 75-ohm-to-120-ohm adapter (with BNC connector)

c

Connecting the Interface Cable

CAUTION:

■For the convenience of extending the connection of E1 120-ohm balanced twisted pair cable, you can use network interface connector.

■E1 120-ohm balanced twisted pair cable, network interface connector,

75-ohm-to-120-ohm adapter are optional accessories. Please select one when purchasing a MIM-2VE1 module; by default, they are not provided.

For cable pinouts, see Low-End and Mid-Range Series Routers Cable Manual.

c CAUTION:

■Some measures are taken to protect MIM-2VE1 module. Still, you are recommended to install a special lightning arrester at the input end of its connection cable to obtain better lightning protection when the cable is led outdoors;