Multitech MT64DSU Manuale del Proprietario Scaricare il pdf (Pagina 60)

MT64DSU Owner's Manual

BACK-TO-BACK CABLE

Figure C-5. Back-to-Back Cable

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 good DSUs Receive circuits. You can order it from

Multi-Tech (#45050000), or build one using the instructions below.

Refer to Chapter 4 for test procedures.

SCHEMATIC

RJ48S

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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Multitech MT64DSU Manuale del Proprietario Pagina 60