H3C MSR 20 Series Manual page 63

Interface Card and Interface Module Manual
H3C MSR 20/30/50 Series Routers
Connect the BNC connector of the cable to the coaxial connector and the other
end of the coaxial connector to the remote network equipment through a 75-ohm
E1 trunk cable, if cable extension is needed.
Caution:
The wire marked TX in the E1 cable should be connected to the peer wire marked RX
and the wire marked RX should be connected to the peer wire marked TX.
Router
75-ohm non-balanced coaxial cable
Figure 2-39 Extending an E1 75-ohm non-balanced coaxial cable
If the remote device has 120-ohm interface, it is needed to use a 75-ohm-to-120-ohm
adapter or use a 120-ohm cable.
2) When the E1 cable is a 120-ohm balanced twisted pair cable:
Directly connect the RJ-45 connector of the cable to the RJ-45 port of the remote
equipment, if there is no need to extend the E1 cable, or
Connect the RJ-45 connector of the cable to the network connector and the other
end of the network connector to the network equipment through a 120-ohm E1
trunk cable, if cable extension is needed.
R outer
1 20 -o hm b a la nced tw iste d pa ir
Figure 2-40 Extending an E1 120-ohm balanced twisted pair cable
Step 4: Check the status of LINK LED on the SIC-1VE1 panel: ON means the link is
connected and OFF means the link is not connected. In the latter case, check the line.
DB -15
BNC
Coaxial connector
D B-15
R J-4 5
N etw ork interface connector
Chapter 2 Smart Interface Cards
BNC
75-ohm E1 trunk cable
N etw ork
R J-4 5
devices such
as DD N
120-ohm E1 trunk cable
2-35
Network
devices
such as DDN