Revised System Architecture - Nortel DMS-100 Series Reference Manual

4-2 Introduction to RSC-S International
This release includes the following capabilities:

Revised system architecture

The base of the RSC-S design is the common peripheral module (CPM)
architecture. The CPM replaces the current expanded peripheral modules
(XPM) for the host and remote applications. The CPM is a group of
peripheral modules (PM) that the Digital Multiplex System (DMS)-100
family uses. The CPM supports current XPM interfaces (I/Fs) where
possible.
The CPM can be a host peripheral or a remote peripheral, like the RCO2. In
remote applications, RCO2 supports different types of trunks and lines.
The same amount of visibility and control that current XPMs have, applies
for the RCO2. The MAP terminal provides access to the new PM types.
The base of RSC-S design is a two-shelf configuration that includes the
RCO2 shelf and the extension shelf. The RCO2 shelf contains the central
processing equipment and circuits that each application requires. The
extension shelf that increases the capacity of the RCO2 shelf contains octal
pulse code modulation 30 (PCM-30) circuit packs and D-channel handlers
(DCH). Central office or a customer location can use the RSC-S package.
297-8331-815 Standard 10.01 August 1999
Intraswitching allows calls that originate and terminate on the RSC-S to
be switched without the use of host links.
ESA allows the continuation of service in the RSC-S when a loss of
communication with the host occurs.
A Warm Switch of Activity (SWACT) allows steady calls to continue
without interruption when a controlled or uncontrolled transfer of RSC-S
call processing occurs. An improvement in pre-SWACT/post-SWACT
audit process reduces the possibility of loss of service. The loss of
service occurs when the mate remote center offshore #2 (RCO2) cannot
gain and maintain call processing activities.