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DMS-100 Ringing System

3-1

3 Ringing in Series II peripherals

Ringing in the subscriber carrier module

This chapter describes the ringing systems in DMS-100 peripherals belonging

to the subscriber carrier module (SCM) and the line concentrating module

(LCM) families.

The SCM is a family of lines peripherals that provides a digital interface

between the DMS-100 and the subscriber loop concentrator of the subscriber

carrier system. Currently, the following three subscriber loop concentrators are

used with the DMS-100:

• DMS-1 Urban (DMS-1U)

• DMS-1 Rural (DMS-1R)

• SLC-96

A special type of SCM is available for each of the subscriber carrier loop

concentrators as follows:

• SCM-100U (SMU) - DMS-1U

• SCM-100R (SMR) - DMS-1R

• SCM-100S (SMS) - SLC-96

A description of the ringing system in each of the three subscriber loop

concentrator conﬁgurations follows.

SCM-100U

The SCM-100U provides a digital interface between the DMS-100 and the

remote terminal (RT) of the DMS-1U system (refer to DMS-1 Urban System

Description, for a description of the DMS-1U). The term RT is used to

describe the DMS-1U in its stand-alone conﬁguration (also called the universal

conﬁguration). The term remote concentrator urban (RCU) is used to describe

the DMS-1U when it is fully integrated into the DMS-100 switch (the

SCM-100U is the peripheral module that integrates the DMS-1U into the

DMS-100 switch). This document concentrates on the ringing system of the

integrated conﬁguration.

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Universal Remote DMS-100 Especificações Página 69