Rmm - Nortel DMS-100 Series Maintenance Manual

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Table of Contents

2-22 Functional overview

RMM

RMM description

The RMM occupies shelf position 05, bay 1 row B, of the OPM cabinet. The

RMM is a modified, cost-reduced form of the maintenance trunk module

(MTM). The RMM contains a processor that performs a scan of the service

circuits and digit collection during ESA.

The RMM C-side interface uses a pair of DS30A links, one to each LCC in the

HIE shelf. The DS30A links make sure the RMM can operate, even though

the LCC is active. The LCC passes maintenance requests from the host to the

RMM. The LCC provides a link between the RMM and line circuits in the

LCA. At the host office, use of the MAP terminal can direct OPM

maintenance to the RMM. How the RMM communicates with the host and the

LCA through the LCC appears in the following figure.

Figure 9 RMM connection with host and LCA through LCC

With the use of the LCC interface to the DS-1 links, the RMM uses DMS-X

protocol to communicate with the host in a reliable way.

The RMM can accommodate a maximum of 14 maintenance and service

circuit cards. These cards are different in type and must meet provisioning

requirements.

RMM shelf configuration

The RMM shelf has 20 slots. The HIE has 25 slots. The two slots farthest to

the left of the RMM (01, 02) 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 that the RMM requires. The remainder of the shelf (slots

3-16) is assigned to service circuit cards provisioned to meet office

297-8361-550 Standard 04.02 December 2004