Method for switching a mobile telephone for a transmitted/received voice signal in a speakerphone mode

摘要

Switching a mobile telephone for selectively receiving or transmitting a voice signal in a speakerphone mode by counting the number of the full-rate voice data received from the sender, and blocking the transmission path from the receiver to prevent the received voice data from being retransmitted through the receiver's microphone to the sender if the number of the full-rate voice data exceeds a predetermined value.