H3C MSR Router Comware 5 Series Manual page 179

Figure 173 Connect an E1 75-ohm cable
•
If you want to extend the cable, connect each BNC connector of the E1 75-ohm cable to one
end of a coaxial connector, and connect the remote device to the other end of the coaxial
connector through an E1 75-ohm trunk cable.
Figure 174 Connect an E1 75-ohm cable
1/2/4/8-port E1 75-ohm cable
E1 / E1-F
(75ohm)
•
If the impedance of the E1 interface on the remote device is 120 ohms, you must use an
impedance converter to adapt the impedance.
Figure 175 Connect an impedance converter
75-ohm adapter cable
RX
TX
Coaxial connector
170
TX
Device
(75ohm E1 Port)
RX