Patent ID: 6870911

Claim:
A transceiver for transmitting and receiving voice signals and data signals, said transceiver comprising: a voice signal driver configured to operate in an operating mode selected from an idle-operating mode, during which the voice signal driver has a high output impedance, and a working operating-mode, during which the voice signal driver has a low output impedance and is configured to drive an analog transmission voice signal, via a transmission channel, to a subscriber terminal; a data signal driver for driving an analog data transmission signal via the transmission channel to the subscriber terminal; and a data reception circuit configured to convert a received analog data reception signal into digital reception data, the data reception circuit including a multiplication circuit for multiplying the digital reception data by adjustable channel distortion compensation coefficients selected to compensate for channel distortions of the transmission channel, an identification circuit connected to the transmission channel, the identification circuit being configured to output an identification signal indicative of whether the subscriber terminal is taken off-hook or placed on-hook, and a control circuit configured to select the operating mode of the voice signal driver in response to the identification signal by switching the voice signal driver into the working operating-mode when the subscriber terminal is taken off-hook and switching the voice signal driver into the idle operating-mode when the subscriber terminal is placed on-hook, and to set the channel distortion compensation coefficients to compensate for a change in the transmission channel resulting from a change in the output impedance of the voice signal driver.