H3C Technologies H3C MSR 50 - Manual (Page 283)

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Interface cable
FIC-1VE1 interface cables are G.703-compliant cables. The cables are divided into two categories:
75-ohm unbalanced coaxial and 120-ohm balanced twisted-pair.
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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 4-112 E1 75-ohm unbalanced coaxial cable
To extend an E1 75-ohm unbalanced coaxial cable, 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 4-113 E1 120-ohm balanced twisted-pair cable
To extend an E1 120-ohm balanced twisted-pair cable, 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.