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Loopback Cable (MTS P/N 45640100)
DESCRIPTION
This cable lets you test the MT56DSU-S when a second DSU is not available. When the DSU generates a
signal, this cable "loops" the signal back to the DSU for comparison to the original signal sent. You can
order this cable (#45640100) from Multi-Tech, or build one using the instructions below. Refer to Chapter 4
for test procedures.
SCHEMATIC
BUILD INSTRUCTIONS
1.
Strip cable insulation 3/4"
2.
Cut wires 3, 4, 5, 6 off.
3.
Strip wires 1, 2, 7, 8 1/4"
4.
Solder wires 1 and 8 together.
5.
Solder wires 2 and 7 together.
6.
Cover solder connections with 1" of shrink tube.
1
8
Figure B-5. Loopback Cable Connector
TRANSMIT
1
TRANSMIT
2
3
4
RJ48S
5
6
RECEIVE
7
RECEIVE
8
Figure B-6.
6"
Appendix
34
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