H3C Technologies H3C SR6600-X - Manual (Page 48)

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Figure 42 Connecting 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 adapter cable.
Figure 43 Connecting an E1 75-ohm cable
• 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 44 Connecting an impedance converter
Connecting a T1 cable
1. Connect the D68 connector of the 8-port T1 cable to the D68 interface on the interface module and
fasten the bolts to fix the cable.
……
E1 / E1-F
(75ohm)
TX
RX
Device
(120ohm E1 Port)
E1 75-ohm cable Straight-through cable
Impedance converter