3Com MSR 50, MSR 30 E1 75-ohm unbalanced coaxial cable, E1 120-ohm balanced twisted pair cable

MIM-1E1/MIM-2E1/MIM-4E1/MIM-1E1-F/MIM-2E1-F/MIM-4E1-F Modules 83

Table 47 Description of the LEDs on MIM-1E1/MIM-2E1/MIM-4E1 and

MIM-1E1-F/MIM-2E1-F/MIM-4E1-F panels

LED	Description
LINK	ON means the carrier signal has been
	received.
	OFF means no carrier signal has been
	received.
ACTIVE	OFF means no data is being transmitted or
	received. ON means data is being
	transmitted or received.

Interface Cable Interface cable of MIM-1E1/MIM-2E1 and MIM-1E1-F/MIM-2E1-F modules

MIM-1E1/MIM-2E1 and MIM-1E1-F/MIM-2E1-F interface cables are

G.703-compliant cables (referred to as E1 cables throughout the rest part of the manual). E1 cables are divided into two types: 75-ohm unbalanced coaxial cables and 120-ohm balanced twisted pair cables.

■75-ohm unbalanced coaxial cable

Figure 92 E1 75-ohm unbalanced coaxial cable

n You can select a pair of coaxial connectors with a BNC receptacle at both ends that connect two 75-ohm unbalanced coaxial cables with BNC connectors. The coaxial connectors are used for the extension connection with E1 75-ohm unbalanced coaxial cable.

■120-ohm balanced twisted pair cable

At the router side, the connector of the cable is DB-15 (male); at the network side, the connector is RJ-45, as illustrated in the following figure.

Figure 93 E1 120-ohm balanced twisted pair cable

n You can select a network interface connectors with an RJ-45 receptacle at both

ends that connect two 120-ohm balanced twisted pair cables with BNC connectors. The network interface connector is used in the extension connection with E1 120-ohm balanced twisted pair cables.

In addition, a 75-ohm to 120-ohm adapter is provided.