Method and apparatus for the automatic adjustment of a switch means for automatic switching between a reception operating mode and a transmission operating mode in a hands-free means of a communication terminal equipment

摘要

A method is disclosed for the automatic adjustment of a switch means for automatically switching between a reception operating mode and a transmission operating mode in a hands-free means of a communication terminal equipment comprising a reception signal branch in which received signals are processed and output via a loudspeaker, a transmission signal branch in which signals received via a microphone are processed and output, and comprising the switch means to be adjusted with which attenuation stages provided in the reception signal branch and in the transmission signal branch can be selectively driven dependent on signals transmitted over the reception signal branch and the transmission signal branch and whose sensitivity for the signals transmitted over the transmission signal branch and the reception signal branch is adjustable using an audio signal generator. The disclosed method is characterized in that the switch means is adjusted upon measurement of the extent of the coupling of a test tone signal generated by the audio signal generator from the reception signal branch onto the transmission signal branch and/or from the transmission signal branch onto the reception signal branch.