AAL: ATM Adaptation Layer.

AAN: All Area Networking.

AAR: Automatic Alternative Routeing.

abandoned call: A call which is terminated after a connection has been made but before the receiver goes off-hook, i.e. conversation occurs.

abbreviated address call: A call which requires a subset of the full address to initiate the call, the complete address being available from the network switch, such as a packet assembler/disassembler.

abbreviated answer: The reply to a call, made after communications has been established, in which the call sign of the calling station is not included.

abbreviated dialling: Feature of switches, such as a PABX, which allows users to use shortened numbers to place a call, the switch making the translation to the full ...

Get Focal Illustrated Dictionary of Telecommunications now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.