Appendix
Back-To-Back Cable (MTS P/N 45050000)
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Figure B-7. Back-toBack Cable Connector
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
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2 | 7 |
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3 | 6 |
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4 | 5 | RJ48S | |||||
RJ48S 5 | 4 | ||||||
6 | 3 |
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| 7" |
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Figure B-8.
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.
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