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Back-To-Back Cable (MTS P/N 45050000)
DESCRIPTION
This cable lets you test a suspect DSU by connecting it to a known good DSU. It tests the suspect DSU by
connecting its Transmit signal to the Receive circuits of the good DSU. You can order this cable from Multi-
Tech (#45050000), or build one using the instructions below. Refer to Chapter 4 for test procedures.
SCHEMATIC
BUILD INSTRUCTIONS
1.
Strip cable installation 3/4".
2.
Strip wires 1,2,7 and 8 on one end of cable and 8,7,2 and 1 on other end 1/4".
3.
Cut unstripped wires off.
4.
Solder wire 1 on one connector to 8 on the other.
5.
Solder wire 2 on one connector to 7 on the other.
6.
Solder wire 7 on one connector to 2 on the other.
7.
Solder wire 8 on one connector to 1 on the other.
8.
Cover solder connections with 1" of shrink tube.
1
8
Figure B-7. Back-toBack Cable Connector
1
2
3
4
RJ48S
5
6
7
8
Figure B-8.
8
7
6
5
RJ48S
4
3
2
1
7"
Appendix
35
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