HP HSR6800 Installation Manual page 39

Figure 38 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 39 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 40 Connecting an impedance converter
E1 / E1-F
(75ohm)
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 75-ohm cable
RX
TX
Impedance converter
Straight-through cable
33
Device
(120ohm E1 Port)