Glossary
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
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
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.
