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channel Glossary
Administration for Network Connectivity
CID: 77730 555-233-504 — Issue 1 — April 2000
470
channel
A communication path linking two points for transmitting voice and data. Also:
1. A circuit-switched call.
2. 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.
3. A DS0 on a T1 or E1 facility not specifically associated with a logical
circuit-switched call; analogous to a single trunk.
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.
Class of Restriction (COR)
A feature that allows up to 64 classes of call-origination and call-termination
restrictions for voice terminals, voice-terminal groups, data modules, and trunk
groups.
Class of Service (COS)
A feature that uses a number to specify if voice-terminal users can activate the
Automatic Callback, Call Forwarding All Calls, Data Privacy, or Priority
Calling features.
circuit-switched network
A network that sets up and maintains a connection for the exclusive use of two
or more communicating parties for the duration of their call. The familiar,
voice telephone network is circuit-switched. See packet switching.
clear-channel facility
A digital circuit that requires no in-channel framing or control bits. The whole
bandwidth is thus available for data transmission.
client
An application that runs on one processor while drawing on data or other
resources that are on a server located elsewhere. MMCX client: a workstation
capable of making MMCX calls. Such a workstation is a client of one or more
MMCX servers. See dial-plan table.
CMDR
Centralized Message Detail Recording. (Same as CDR and SMDR).
CMS
Call Management System.