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CONFERENCE CALL SYSTEM IN AN EXCHANGE AND A SWITCHING METHOD THEREOF, ESPECIALLY CONCERNED WITH EXECUTING CONFERENCE CALLS AT A LOCAL BOARD, WITHOUT USING A CONFERENCE CALL RESOURCE
CONFERENCE CALL SYSTEM IN AN EXCHANGE AND A SWITCHING METHOD THEREOF, ESPECIALLY CONCERNED WITH EXECUTING CONFERENCE CALLS AT A LOCAL BOARD, WITHOUT USING A CONFERENCE CALL RESOURCE
PURPOSE: A conference call system in an exchange and a switching method thereof are provided to save the manufacturing costs by implementing conference calls only with simple switching at a local board and speech path switching at a call processing part, without the necessity of using a conference call resource. CONSTITUTION: A conference call system is comprised of an exchange(30), a subscriber board(40), and a plurality of subscriber phones(50-1-50-n). The exchange(30), composed of a switching part and a message processing part, enables a conference call to be executed by switching. The subscriber board(40) receives a conference call request from each subscriber phones(50-1-50-n), creates a conference call request message, and transmits it to the exchange(30). The subscriber board(40) receives a function message from the exchange(30) and loads a reception highway signal on a transmission highway so that subscriber phones(50-1-50-n) can phone to each other.
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