call - caul
- call
- call acceptance signal
- call accounting system
- call attempt
- call barring
- call bell
- call button
- call by name
- call by reference
- call charge
- call charge rate
- call control
- call control agent
- call distributor
- call diversion
- call diverter
- call duration
- call flow
- call for help
- call handling
- call held
- call hold
- call holding
- call identification
- call identity
- call interception
- call logging
- call loss priority
- call message supervisory
- call metering
- call modification completed message
- call modification reject message
- call modification request message
- call origin
- call portability
- call processor
- call queued
- call reference
- call retrieval
- call sender
