Nortel DMS-100 Series Maintenance Manual page 42

Outside plant access cabinet (opac)

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Table of Contents

1-26 Maintenance overview

The RMM can accommodate a maximum of 14 maintenance and service

circuit cards. These cards vary in type and meet different provisioning

requirements.

RMM connection with host and LCA through LCC

RMM shelf configuration

The RMM shelf has 20 slots. The HIE has 25 slots. The two slots on the far

left of the RMM (01, 02) are assigned to the DS30A interface and control

cards. Slots 17, 18 and 20 are on the far right of the shelf. These slots

contain two types of power converters required in the RMM.

The remainder of the shelf (slots 02 to 16) are assigned to service circuit

cards provisioned to meet office engineering requirements. The following

figure is an example of card selections for a normal RMM.

RMM control card

The RMM control card (NT6X74AB), located in slot 02, is required in the

RMM. The RMM control card acts as an interface between the LCA shelves

and the following:

The RMM control card processes DMS-X messages, trunk messages, and

pulse code modulation (PCM) data.

Power converters

Two types of power converters are required in the RMM shelf:

297-8211-550 Standard 05.01 August 1999

test trunks of the RMM

service circuits of the RMM

alarm circuits of the RMM

multioutput power converter (NT2X09)

Link control

Troubleshooting