Esa Maintenance Overview; Functional Description; Esa Hardware Representation - Nortel DMS-100 Series Maintenance Manual

Remote line concentrating module

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ESA maintenance overview

The Remote Line Concentrating Module (RLCM) with the Emergency

Stand-Alone (ESA) feature package NTX154AA is a different configuration

than the standard RLCM. Special hardware components are required in

addition to the ESA software. The ESA configuration receives separate

treatment in this chapter.

The RLCM is a remote configuration. The communication links between

the RLCM and the host site can be defective or severed. Service can be

interrupted. The ESA feature package was designed for the RLCM to

provide stand-alone call-processing ability. The RLCM must provide this

call processing ability if loss of communication with the host occurs. With

the ESA feature package, the RLCM emulates the call processing functions

of the line trunk controller (LTC) and the central control (CC).

A diagram of the ESA hardware configuration, from the angle of the MAP

terminal, appears in the figure "RLCM hardware representation." This

diagram describes the RLCM as a C-side node to the ESA processor and the

remote maintenance module (RMM). The RLCM is not in the ESA mode.

DMS-100 Family RLCM Maintenance Manual XPM12 and up