Multi-tech-systems MT56DSU-S Manual de usuario descargar pdf (Pagina 34)

Appendix

Loopback Cable (MTS P/N 45640100)

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

RECEIVE

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.

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Multi-tech-systems MT56DSU-S Manual de usuario Pagina 34