Northern Telecom DMS-100 Series Maintenance Manual page 222

17-2 List of terms
central control complex (CCC)
The part of the DMS-100 Family switch that contains all the central control
(CC) functions. The functions include the central message controller
(CMC), CPU, program store (PS), and data store (DS).
central message controller (CMC)
A hardware device, located in the central control complex frame, that
provides an interface between the CPU, network module controllers, and
input/output controllers.
central processing unit (CPU)
The hardware unit of a computing system that contains the circuits that
control and perform the execution of instructions.
central side (C-side)
The side of a node that faces away from the peripheral modules (PM) and
toward the central control (CC). Also known as control side. See also
peripheral side.
channel supervision message (CSM)
A message received and transmitted continuously over each connected voice
channel of a peripheral module (PM). The CSM contains a connection data
byte. The connection data byte includes the channel supervision bit (CSB),
and an integrity byte, that issues call path integrity.
CI
command interpreter
CM
computing module
CMC
central message controller
command interpreter (CI)
A component in the support operating system that functions as the main
interface between machine and user. The main functions of the CI include
the following:
297-1001-591 Standard 04.03 March 1999
read lines entered by a terminal user
break each line into known units
analyze the units
recognize command-item numbers on the input lines