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Primary-Rate Interface

(P-R-I)

The full ISDN configuration. PRI uses one D-channel (call-control info) and 23 (30 in Europe) B-channels for voice/data at 64Kbps each. You'll typically find a PRI between a PBX and telephone company central office or long distance phone company. (Also see BRI.)

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Last Changed: Monday, January 23, 2006
Navigation: Computer Knowledge Home :: Terms :: P :: PRI