H3C Technologies H3C MSR 50 - Manual (Page 174)

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Figure 3-82 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 3-83 75-ohm-to-120-ohm adapter (with BNC connector)
For cable pinouts, see Low-End and Mid-Range Series Routers Cable Manual.
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For the convenience of extending the connection of E1 120-ohm balanced twisted pair cable, you
can use network interface connector.
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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-1VE1 module; by
default, they are not provided.
Connecting the interface cable