Instruction manual

Glossary
Issue 3 July 2001
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C
call appearance
For the phone or attendant console, a button labeled with an extension and
used to place outgoing calls, receive incoming calls, or hold calls. Lights
next to the button show the status of the call appearance.
Call Detail Recording (CDR)
A feature that records call data.
Call Vectoring
A feature that allows users to provide flexible, customized call handling by
writing a series of instructions in a simple programming language.
carrier
An enclosed shelf containing vertical slots that hold circuit packs.
centum call seconds (CCS)
CCS is a unit for measuring call traffic. One CCS equals 100 seconds. Call
traffic for a facility, such as a hunt group or phone, is scanned every 100
seconds. If the facility is busy, it is assumed to have been busy for the entire
scan interval. There are 3600 seconds per hour, so a facility that is busy for
an entire hour will be measured as being busy for 36 CCS.
central office (CO)
The location of phone switching equipment that provides local phone service
and access to toll facilities for long-distance calling.
circuit
A channel or transmission path between two or more points.
Class of Restriction (COR)
A feature that defines call-origination and call-termination restrictions.