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private automatic branch exchange

private automatic branch exchange in Technology

(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.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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