Device for speaking by telephone among subscribers of radio interface unit in wireless local loop

摘要

The invention Wireless Local Loop (Wireless Local Loop; WLL) Subscriber Line device; to the telephone subscriber access (Radio Interface Unit RIU) suggested to the three-way or four-way call to a local subscriber and a remote subscriber, such the present invention allows the control unit generates a control signal for the conference call when receiving the request signal from the telephone is busy, the summation and selecting each of the subscribers join the call data from the control unit. And by the sum of the subscriber data and select to join the call according to the control of the control section in the multiplexer / summer equipped for each telephone subscriber line and to provide a conference call service.