1. Authentication, Authorization and Accounting Services;
2. Authentication, Authorization, Audit/Accounting

Advanced Audio Coding

ATM Adaptation Layer

Application Aware Networks

A call in which the call originator disconnects or cancels the call after a connection has been made, but before the call is established.

Network replacement of a connect signal with an on-hook signal (network) prior to receiving a CI (customer installation) answer signal; abandonment is the only way to end an unanswered call attempt. [T1.405-1989]

An address that has fewer characters than the full address, usually for special communications and other services or for certain users.
Note: Examples of abbreviated addresses are (a) a four-digit telephone number for a user calling another user connected to the same switching exchange, and (b) message addresses that have only the addressee name and station code or number. [After… (Read More →)

Calling that enables a user to employ an address having fewer characters than the full address when initiating a call.
Note: Communications network users may be allowed to designate a given number of abbreviated address codes. The allocation of the abbreviated address codes to a destination or group of destinations may be changed as required, by means of a suitable… (Read More →)

A telephone service feature that (a) permits the user to dial fewer digits to access a network than are required under the nominal numbering plan, and (b) is limited to a subscriber-selected set of frequently dialed numbers. Synonym speed dialing.

Augmented Backus-Naur Form