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Appendix A Cable Making
B.1 E1 cable making
For 75Ω BNC interface:
The application of coaxial cable of model SYV75-5, SYV75-3 or SYV75-2-2 is recommended.
Please keep the maximal length of the cable within 200 meters.
Take out the BNC connector from the appendix pack of the device, and screw off the protection
cover. Part the core and the shield of the coaxial cable, and set the protection cover on to the cable.
Weld the core of the cable and the core of the BNC connector and weld the shield of the cable and
that of the BNC connector. Fix the protection cover at the rear of the connector firmly.
TX — output unbalanced signal
RX — input unbalanced signal
120Ω RJ-45 interface:
Please use CAT-5 twisted pair cable with RJ-45 connector to connect to the device. For the figure of
the RJ-45 connector and its pin arrangement, please see Figure A-1 and Table A-1.
Pin
Number
Definition
OUT+ — output positive signal of device
OUT- — output negative signal of device
IN+ — input positive signal of device
IN- — input negative signal of device
NC — no connection
Figure A-1 The pin arrangement of RJ-45 crystal connector (top view)
Table A-1 RJ-45 connector pin arrangement for E1
1
2
OUT+
OUT-
3
4
NC
IN+
IN-
5
6
7
NC
NC
User Manual
8
NC
20
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