CDOS
Issue 1.0 May 2003
395
CAS
Centralized Attendant Service or Call Accounting System
CCS or hundred call
seconds
A unit of call traffic. Call traffic for a facility 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. The Roman numeral for 100 is the capital letter C. The
abbreviation for call seconds is CS. Therefore, 100 call seconds is abbreviated CCS.
If a facility is busy for an entire hour, then it is said to have been busy for 36 CCS.
See also
Erlang on page 405
.
capability
A request or indication of an operation. For example, Third Party Make Call is a
request for setting up a call; event report is an indication that an event has occurred.
capability group
Set of capabilities, determined by switch administration, that can be requested by an
application. Capability groups denote association types. For example, Call Control is
a type of association that allows certain functions (the ones in the capability group) to
be performed over this type of association. Also referred to as administration groups
or application service elements (ASEs).
CA-TSC
Call-Associated Temporary Signaling Connection
cause value
A value is returned in response to requests or in event reports when a denial or
unexpected condition occurs. ASAI cause values fall into two coding standards:
Coding Standard 0 includes any cause values that are part of AT&T and CCITT
ISDN specifications; Coding standard 3 includes any other ASAI cause values. This
document uses a notation for cause value where the coding standard for the cause
is given first, then a slash, then the cause value. Example: CS0/100 is coding
standard 0, cause value 100.
CBC
Call-by-call or coupled bonding conductor
CC
Country code
CCIS
Common-Channel Interoffice Signaling
CCITT
CCITT (Comitte Consultatif International Telephonique et Telegraphique), now called
International Telecommunications Union (ITU). See
International
Telecommunications Union (ITU)
on page 411.
CCMS
Control-Channel Message Set
CCS
See
CCS or hundred call seconds
on page 395.
CCSA
Common-Control Switching Arrangement
CDM
Channel-division multiplexing
CDOS
Customer-dialed and operator serviced
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