Private Automatic Branch eXchange


private automatic branch exchange

[′prī·vət ¦ȯd·ə‚mad·ik ′branch iks‚chānj] (communications) A private branch exchange in which connections are made by remote-controlled switches. Abbreviated PABX.

Private Automatic Branch eXchange

(communications)(PABX) A telephone exchange operated withinan organisation, used for switching calls between internallines and between internal and PSTN lines. In contrast to aPMBX, a PABX can route calls without manual intervention,based entirely on the number dialed. Not all PABXs can routeexternal calls to internal numbers automatically however.