private automatic branch exchange

Computing Dictionary

Private Automatic Branch eXchange definition

communications
(PABX) A telephone exchange operated within an organisation, used for switching calls between internal lines and between internal and PSTN lines. In contrast to a PMBX, a PABX can route calls without manual intervention, based entirely on the number dialed. Not all PABXs can route external calls to internal numbers automatically however.
(1998-08-07)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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