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Definition of "Private Branch Exchange" |
Private Branch Exchange is a switching system providing telephone communications between internal stations and external telephone networks. The term generally refers to manually operated switching equipment as opposed to computer operated switching. / A PBX (private branch exchange) is a telephone system within an enterprise that switches calls between enterprise users on local lines while allowing all users to share a certain number of external phone lines. The main purpose of a PBX is to save the cost of requiring a line for each user to the telephone company's central office.The PBX is owned and operated by the enterprise rather than the telephone company (which may be a supplier or service provider, however). Private branch exchanges used analog technology originally. Today, PBXs use digital technology (digital signals are converted to analog for outside calls on the local loop using plain old telephone service (POTS ). / Keyboard send/receive is a manual teleprinter that can transmit or receive. Also known as keyboard teleprinter. |
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