Digital Remote Test Unit; Fiber Multiplex Terminal-6; Additional Opm-256 Components; Opm-256 Optional Equipment Shelf - Nortel DMS-100 Series Maintenance Manual

Digital Remote Test Unit

The DRTU (NT0J42AA) model 3704 allows a full set of accurate and
cost-effective line tests over standard DS-1 or fiber-optic facilities. The
fiber-optic facilities are at an OPM remote location. The DRTU is mounted on
the back wall of an OPM-640 or OPM-256. For more information about the
DRTU, refer to the Model 3704 Digital Remote Test Unit (DRTU) Description
and Installation Guide, 662-5021-233. You also can refer to the Model 3704
Digital Remote Test Unit (DRTU)/Outside Plant Module (OPM) Installation
Instructions, 662-5021-235. Refer to figure "Battery arrangement and back
wall components in the OPM cabinet".

Fiber Multiplex Terminal-6

The Fiber Multiplex Terminal-6 (FMT-6), is a compact stand-alone
multiplexer and 6-Mbps light-wave transmission system. The FMT-6
transports a maximum of four DS-1 electrical signals by single mode or
multimode fiber-optic cable. The FMT-6 can be mounted on the back wall of
an OPM-640 or OPM-256. For FMT-6 ordering, installation, and operation
information, refer to the FMT-6 User Guide, 321-3231-290.

Additional OPM-256 components

The following sections describe optional components available for the
OPM-256. Also, refer to the figure "Bay frame equipment location for
OPM-256 (NT8X01BC)".

OPM-256 optional equipment shelf

The OPM-256 is a one-shelf module that contains two LCAs with only four
line drawers. One shelf is empty for optional equipment. The flexibility of the
OPM configuration allows provisioning of advanced digital services to remote
subscribers. The optional equipment available for this shelf includes:
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The section describes the optional equipment available for OPM-256.
Line size upgrade equipment
A 320-line upgrade kit (NT8X09AB, AC, AD) increases the total line size of
the OPM-256 to 576 lines. This option can be installed as a field upgrade
without loss in service. This condition provides a lower cost result for small
community growth needs. Additional line cards and the requirement for an
additional scan card (NT0X10), in the RMM in slot 7 causes the change in
OPM function.
line size upgrade equipment
DE-4E enhanced PCM channel bank
FMT-150B fiber terminal
DMS-100 Family OPM Maintenance Manual XPM14 and up
OPM hardware 5-9