资料来源 : Free On-Line Dictionary of Computing

Private Automatic Branch eXchange
     
         (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)