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Loopback cable (mts p/n 45640100), Back-to-back cable (mts p/n 45050000), Appendix – Multi-Tech Systems MT56DSU-S User Manual

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34

Appendix

Loopback Cable (MTS P/N 45640100)

1

8

Figure B-5. Loopback Cable Connector

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

RJ48S

1
2
3
4
5
6
7
8

6"

RECEIVE
RECEIVE

TRANSMIT
TRANSMIT

Figure B-6.

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.

See also other documents in the category Multi-Tech Systems Hardware: