Revised System Architecture; Packaging - Nortel DMS-100 Series Reference Manual

3-2 Introduction to RSC-S International

Revised system architecture

The RSC-S design is like the common peripheral module (CPM)
architecture. The CPM replaces the current expanded peripheral modules
(XPM) for host and remote applications. The CPM is a family of peripheral
modules (PM) that the DMS-100 family uses. The CPM supports current
XPM interfaces where the CPM is able to support these interfaces.
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
amount of visibility and control that is available for current XPMs is
available to the RCO2. The MAP terminal provides access to these new PM
types.
The RSC-S design has a dual-shelf configuration that includes the RCO2
shelf and the extension shelf. The RCO2 shelf contains central processing
equipment and circuits that each application requires. The extension shelf
increases the capacity of the RCO2 shelf. The extension shelf contains octal
PCM-30 circuit packs and D-channel handlers (DCH). A central office or a
customer location can use the RSC-S package.

Packaging

The RSC-S packaging differs from traditional RSC packaging as follows:
297-8331-815 Standard 10.01 August 1999
The RSC-S can be provisioned in cabinets instead of equipment frames.
The RSC-S model A uses the equipment frame and model B is
configured in cabinets.
The RSC-S design is like the RCO2. The RCO2 is the master controller
for all RSC-S peripherals. The RCO2 is a single-shelf, 68020- or
68040-based module with increased processing abilities.
The core RSC-S cabinet has a dual-shelf enhanced line concentrating
module (LCME).
An RSC-S extension cabinet contains additional ISDN DCH or PCM-30
interfaces. The extension shelf also has one LCME.