Chapter 7 External Cable Installation
Table 7-5 Connection Relationship at the Ends of E1 Crossover Cable RJ48
End A
Signal
End B
Signal
1
RX_RING
4
TX_RING
2
RX_TIP
5
TX_TIP
3
Un-connected
3
Un-connected
4
TX_RING
1
RX_RING
5
TX_TIP
2
RX_TIP
6
Un-connected
6
Un-connected
7
Un-connected
7
Un-connected
8
Un-connected
8
Un-connected
If the peer device uses BNC connector, it is needed to add a RJ48-to-BNC interface
converter. Now ZXR10 ZSR is connected to converter with straight-through E1 cable,
while the peer device is connected to converter through coaxial cable.
The connection relationship of the straight-through E1 cable ends is shown in
Table 7-6
.
Table 7-6 Connection Relationship of RJ48 Connectors at Two Ends of Straight-through
E1 Cable
Terminal A
Signal
Terminal B
Signal
1
RX_RING
1
TX_RING
2
RX_TIP
2
TX_TIP
3
Un-connected
3
Un-connected
4
TX_RING
4
RX_RING
5
TX_TIP
5
RX_TIP
6
Un-connected
6
Un-connected
7
Un-connected
7
Un-connected
8
Un-connected
8
Un-connected
7.4.2 120ΩE1 (DB44) Cable Installation
The connector on one end of 120Ω E1 (DB44) cable is DB44, and the other end is
customized. The cable length is variable.
The connection at DB44 end of cable is shown in
Table 7-7
.
7-5
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