Glossary:

ATIS Telecom Glossary

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Select a term name to open its entry and any media references. Longer definitions end with a “Read More” link.

AAC

Advanced Audio Coding

AAL

ATM Adaptation Layer

AAW

Application Aware Networks

abandoned call

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

abandonment

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]

abbreviated address

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 →)

abbreviated address calling

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 →)

abbreviated dialing

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.

ABNF

Augmented Backus-Naur Form

abort

1. In a computer or data transmission system, to terminate, usually in a controlled manner, a processing activity because it is impossible or undesirable for the activity to proceed.
2. In data transmission, a function invoked by a sending station to cause the recipient to discard or ignore all bit sequences transmitted by the sender since the preceding flag sequence.

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