Nortel DMS-100 Series Maintenance Manual page 51

Remote line concentrating module

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RMM connection with host and LCA through LCC

The RMM uses DMS-X protocol to communicate with the host, through the

LCC interface to the DS-1 links.

The RMM can accommodate a maximum of 14 maintenance and service

circuit cards. These cards vary in type and are selected to meet provisioning

requirements.

RMM shelf configuration

The RMM shelf has 20 slots. The two slots of the RMM (01, 02) at the top

left are assigned to the DS30 interface and control cards. Slots 17–18 and

20 on the far right of the shelf contain two types of power converters for the

RMM. The remainder of the shelf (slots 3–16) are assigned to service

circuit cards that must meet office engineering requirements. Figure

"Remote maintenance module shelf design" contains an example of card

selections for a normal RMM.

RMM control card

The RMM also requires the RMM control card (NT6X74AB), in slot 02.

The RMM control card acts as an interface between the line concentrating

array shelves and the test trunks, service circuits, and alarm circuits of the

RMM. 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:

multi-output power converter (NT2X09)

5-V/40-A power converter (NT2X06)

DMS-100 Family RLCM Maintenance Manual XPM12 and up

Maintenance overview 1-35

Troubleshooting