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Glossary
Issue 7 May 1998 GL-7
Coverage call
A call that is redirected from the called extension to another extension or group of extensions when
certain criteria are met.
See also
Coverage criteria.
Coverage criteria
The conditions under which a call to a principal is redirected to coverage — for example, the Send
All Calls button is on, the line is busy, or all the appearances are in use. Also called “criteria” and
“redirection criteria.”
See also
Coverage call.
CPN
Calling Party Number
CRV
Call Reference Value
CSTA
Computer-supported Telecommunications Applications
CTI
Computer/Telephony Integration
Customer Database- Provided Digits (cdpd)
Digits that are retrieved by the network from a customer host database and passed to DEFINITY
ECS in an ISDN SETUP message.
Customer -Entered Digits (ced)
Digits that are collected from the caller by the network and passed to DEFINITY ECS in an ISDN
SETUP message.
D
DCS
Distributed Communications System
Denying a Request
Sending a negative acknowledgement (NAK) or Facility Information Element (FIE) with a
return
error
component. (A cause value is also provided.) This should not be confused with the Denial
Event Report, which applies to calls.
Device
Telephone or Soft extension
Dial-ahead digits
Touch-tone digits entered by a caller but not yet collected by a collect digits vector step.
Dial-ahead digits are stored in the call prompting buffer until collected by a collect digits vector
step. However, if customer-entered digits (ced)or customer database-provided digits (cdpd) are
encountered at the vectoring step, then the dial-ahead digits
that were stored in the buffer will be
deleted.
See
Collected digits, Customer-entered digits, and Customer database-provided
digits.
Distributed Communications System
A private network of PBXs in which some features are transparent across PBXs.
Or, a network configuration linking two or more ECS(s) in such a way that selected features appear
to operate as if the network were one system/ECS.