Nortel DMS-100 Series Maintenance Manual page 26

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Table of Contents

1-10 OPM maintenance summary

figure "Battery Arrangement and Back Wall Components in the OPM

Digital Remote Test Unit

The DRTU, NT0J42AA, Model 3704, allows a full set of accurate and

cost-effective line tests to occur. These tests occur over standard DS-1 or

fiber-optic facilities at an OPM remote location. The DRTU is mounted on the

back wall of an OPM-640 or OPM-256. For the location of the DRTU, refer

to the figure "Battery Arrangement and Back Wall Components in the OPM

For more information about the DRTU, refer to the following:

Fiber Multiplex Terminal-6

The Fiber Multiplex Terminal-6 (FMT-6) is a small stand-alone multiplexer

and 6 Mbps light-wave transmission system. This transmission uses a single

mode or multimode fiber-optic cable to transport a maximum of four DS-1

electrical signals. The FMT-6 mounts on the back wall of an OPM-640 or

OPM-256. For information on how to order, install and operate the FMT-6,

refer to the FMT-6 User Guide, 321-3231-290.

297-8361-550 Standard 04.02 December 2004

Model 3704 Digital Remote Test Unit Description and Installation Guide,

662-5021-233

Model 3704 Digital Remote Test Unit /Outside Plant Module Installation

Instructions, 662-5021-235

Troubleshooting