Patent ID: 6091937
Filing Date: 2000-07-18
Classification: H04M

Abstract:
A method for the automatic adjustment of an adjustable switch used to automatically switch between a reception operating mode and a transmission operating mode in a hands-free communicator of a communication terminal, having: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, andthe adjustable switch,with which attenuation stages provided in the reception signal branch and in the transmission signal branch can be selectively driven according to the signals transmitted over the reception branch and over the transmission signal branch, andwhose sensitivity is adjustable using an audio signal generator for generating the signals transmitted over the reception signal branch and over the transmission signal branch, andwhich comprises means for avoiding a reception-side self-interruption and means for avoiding a transmission-side self-interruption,comprising the steps of:generating a plurality of test tones with the audio signal generator,measuring the extent of the coupling of the test tones generated by the audio signal generator from the reception signal branch onto the transmission branch and/or from the transmission signal branch onto the reception signal branch, and then adjusting the switch according to the measurement.