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Subscriber Carrier Module
The Subscriber Carrier Module (SCM) gives a direct interface for remote
concentrators.
SCM-100R - It can interface up to five Northern Telecom DMS-1 Rural Remote
Terminals (RTs). A DMS-1 rural remote terminal can interface up to 256 lines.
Communication between the RT and SCM- 100R is done through one or two span
lines for voice and one protection line.
SCM-100U - It can interface up to three DMS-1 Urban RTs. A DMS-1 Urban can
interface up to 576 POTS or special service lines. Communication from the RT
to the SCM-100U us done through a maximum of eight DS-1 links.
SCM-100S - It can interface up to four Mode I (non-concentrated) SLC-96
systems or up to six Mode II (concentrated) systems. A SLC-96 can give
interface for up to 96 lines.
The SCM-100 takes away the need for central concentrating terminals and analog
line circuits at the host.
Operator Features
With the use of DMS-200 or DMS 100/200 switch, operator features are available
by the following:
Traffic Operator Position System (TOPS)
Operator Centralization (OC)
Auxiliary Operator Service System (AOSS)
Traffic Operator Position System (TOPS) gives many operator function on inward
and outward calls. The TOPS integrates the operator system with the DMS-200
or DMS-100/200 toll switch.
One voice and one data circuit are needed for each operator position. The
voice circuit is connected to a port of a three-port conference circuit. The
other two ports are connected to the calling and called parties. The data
circuit is used for a digital modem and is used to transmit data punched in by
the operator to the CCC for processing.
Operator Centralization
Operator Centralization (OC) lets the operator use the services given by the
DMS-200 or DMS-100/200 with TOPS. With OC operator traffic from surrounding
DMS sites can be routed to a central host site.
Operator Centralization Diagram
Routing - - -
<-----\ DMS-200 | AMA |
\ Remote TC / - - -
= = = = = = = /
| \ ----- ___|_/
| \: DMS : |
| : 200 : | Host TC -----
| : : | = = = = = = = = /| POS |
| : (OC:___| | --------- | / |- - -|
| : : |\ | : DMS-200 : | / |Oper.|
| -----\ | \ | : (TOPS) :__|_/ -----
= = = = = = = \____________|__: : |
Trib Ope Traffic->\ ____________|__:OC) : |
\ / | : : |
Non-DMS Remote TC / | --------- |
= = = = = = = = = = = = = = = = = = =
| -------- ----- |
| : TDM : : (OC: |
| : Switch : : : | -----
| : : : DMS :_|_____: AMA :
| : : : 200 : | -----
| /-------- -----\ |
= = = = = = = = = = =
/Routing \ <-Trib Opr Traffic
\-------> \
Auxiliary Operator Services System
The Auxiliary Operator Services System (AOSS) is made to handle directory
assistance, intercept, and that type of operator services, automatic call
distribution, call processing, call detail recording, and operator
administration functions for other operator services that do not need call
completion to a called party. AOSS position uses the same hardware as the
TOPS links to the switch.
Equal Access
Equal Access (EA) is accessible through DMS switches with the addition of
software packages. Both Equal Access End Office (EAEO) for the DMS-100 and
Access Tandem (AT) for the DMS-200 provide equal access features.