H3C Technologies H3C MSR 50 - Manual (Page 276)

4-81
Interface cable
FIC-2VE1 interface cables are G.703-compliant cables. The cables are divided into two categories:
75-ohm unbalanced coaxial and 120-ohm balanced twisted-pair.
z
75-ohm unbalanced coaxial cable
As shown in the following figure, at the router end of the cable is a DB-15 plug and at the network end
are two BNC receptacles.
Figure 4-104 E1 75-ohm unbalanced coaxial cable
To extend an E1 75-ohm unbalanced coaxial cable, you can select a pair of coaxial connectors with a
BNC receptacle at each end to connect the BNC receptacles of the cable each to a 75-ohm unbalanced
coaxial cable with BNC connectors.
z
120-ohm balanced twisted-pair cable
As shown in the following figure, at the router end of the cable is a DB-15 plug and at the network end
is an RJ-45 connector.
Figure 4-105 E1 120-ohm balanced twisted-pair cable
To extend an E1 120-ohm balanced twisted-pair cable, you can select a network connector with an
RJ-45 receptacle at each end to connect the cable to another 120-ohm balanced twisted-pair cable.
In addition, you are available with 75-ohm-to-120-ohm adapters.