Telecommunications system.

AN ADEQUATE COMMUNICATION PROCEDURE FOR WIRELESS TELEPHONES IS PRESENTED, INCLUDING DUPLEX RADIOCOMMUNICATION IN TIME DIVISION BETWEEN A HEADSET (11) AND A BASE STATION (3) USING ALTERNATIVE TRANSMISSION GUSTS ON A SIMPLE RADIO CHANNEL. ONCE THE RADIO LINK HAS BEEN ACHIEVED, THE INITIAL TRANSMISSIONS CARRY A LOGIC SYNCHRONIZATION CHANNEL (S) AND A LOGIC SIGNALING CHANNEL (D) BOTH MULTIPLEXED TOGETHER, BUT THE UNION CAN SWITCH TO CARRY A LOGIC COMMUNICATION CHANNEL ) FOR VOICE DATA AND A LOGIC SIGNALING CHANNEL (D). SYNCHRONIZATION IS ACHIEVED BY ASYNCHRONOUS DETECTION OF WORDS FROM A SYNCHRONIZATION CHANNEL (S). THE WORDS HAVE A BIP FORMAT, REDUCING THE PROBABILITY OF INCORRECT ASYNCHRONOUS DETECTION. IF ONE PARTY FAILS TO RECEIVE HEADPHONE SIGNALS, A SPECIAL SIGNAL IS TRANSMITTED, INFORMING THE OTHER PARTY. THIS MAKES IT POSSIBLE FOR BOTH PARTIES TO DETECT THE FAILURE OF THE LINK AT THE SAME TIME, SO THAT YOUR ACTIONS TO RE-ESTABLISH THE LINK ARE SYNCHRONIZED.