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private automatic branch exchange

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- A private automatic branch exchange (PABX) is an automatic telephone switching system within a private enterprise. Originally, such systems - called private branch exchanges (PBX) - required the use of a live operator. Since almost all private branch exchanges today are automatic, the abbreviation "PBX" usually implies a "PABX."

Some manufacturers of PABX (PBX) systems distinguish their products from others by creating new kinds of private branch exchanges. Rolm offers a Computerized Branch Exchange (CABX) and Usha Informatics offers an Electronic Private Automatic Branch Exchange (EPABX).

For additional information, see private branch exchange.

CONTRIBUTORS:	Mario Grullon Damian
LAST UPDATED:	31 Jul 2001

Read more about private automatic branch exchange:

-	Macrotel is one of a number of companies that make PABX systems that handle both digital and analog or voice on hybrid Integrated Services Digital Network lines.
-	Rolm describes their Rolm 9200 CBX .
-	Usha describes their Coral EPABX .

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