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| dial plan (A grouping of telephony users with some specific properties, such as unique telephone extension numbers, that allow the Private Branch eXchange (PBX) to determine what action to take with dialed digits) | |||
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| dial plan (A grouping of telephony users with some specific properties, such as unique telephone extension numbers, that allow the Private Branch eXchange (PBX) to determine what action to take with dialed digits) | |||
