Administrator's Guide

C
Issue 5 October 2002 1961555-233-506
CESID
Caller’s Emergency Service Identification
channel
1. A circuit-switched call.
2. A communications path for transmitting voice and data.
3. In wideband, all of the time slots (contiguous or noncontiguous) necessary to support a call. Example: an
H0-channel uses six 64-kbps time slots.
4. A DS0 on a T1 or E1 facility not specifically associated with a logical circuit-switched call; analogous to a
single trunk.
channel negotiation
The process by which the channel offered in the Channel Identification Information Element (CIIE) in the
SETUP message is negotiated to be another channel acceptable to the switch that receives the SETUP mes-
sage and ultimately to the switch that sent the SETUP. Negotiation is attempted only if the CIIE is encoded as
Preferred. Channel negotiation is not attempted for wideband calls.
CI
Clock input
circuit
1. An arrangement of electrical elements through which electric current flows.
2. A channel or transmission path between two or more points.
circuit pack
A card on which electrical circuits are printed, and IC chips and electrical components are installed. A circuit
pack is installed in a switch carrier.
CISPR
International Special Committee on Radio Interference
Class of Restriction (COR)
A feature that allows up to 96 classes of call-origination and call-termination restrictions for voice terminals,
voice-terminal groups, data modules, and trunk groups. See also Class of Service (COS).
Class of Service (COS)
A feature that uses a number to specify if voice-terminal users can activate the Automatic Callback, Call For-
warding All Calls, Data Privacy, or Priority Calling features. See also Class of Restriction (COR).
CLI
command-line interface
cm
Centimeter
CM
Connection Manager
CMC
Compact Modular Cabinet
CMDR
Centralized Message Detail Recording
CMS
Call Management System
CO
See central office (CO).