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Glossary and Abbreviations
555-230-024GL-14 Issue 5 January 1998
COS
See Class of Service (COS).
coverage answer group
A group of up to eight voice terminals that ring simultaneously when a call is redirected to it by
Call Coverage. Any one of the group can answer the call.
coverage call
A call that is automatically redirected from the called party’s extension to an alternate answering
position when certain coverage criteria are met.
coverage path
The order in which calls are redirected to alternate answering positions.
coverage point
An extension or attendant group, VDN, or ACD split designated as an alternate answering
position in a coverage path.
covering user
A person at a coverage point who answers a redirected call.
CP
Circuit pack
CPE
Customer-premises equipment
CPN
Called-party number
CPN/BN
Calling-party number/billing number
CPTR
Call-progress-tone receiver
CRC
Cyclical Redundancy Checking
critical-reliability system
A system that has the following duplicated items: control carriers, tone clocks, EI circuit packs,
and cabling between port networks and center-stage switch in a CSS-connected system. See
also duplicated common control, and duplication.
CSA
Canadian Safety Association
CSCC
Compact single-carrier cabinet
CSCN
Center-stage control network
CSD
Customer-service document
CSM
Centralized System Management
CSS
See center-stage switch (CSS).