Patent ID: 7406099

Claim:
A system for voice and data communication via a common subscriber line, comprising: a data coding device for coding data relating to the data communication into signals of a first frequency range which is left unused by a voice communication with a first set of performance features; a conversion device comprising: an interface for connecting to a voice terminal providing a second set of performance features and for transmitting information relating to a voice communication with said second set of performance features, the information being coded into signals of a second frequency range; and a recoder to recode the signals of the second frequency range to signals of a third frequency range that is outside the first frequency range; and a frequency separating filter to feed signals of the first and third frequency ranges into the subscriber line wherein the signals of the first and third frequency ranges are transmitted together with the voice communication with the first set of performance features, on a single transmission line, and the signals of the second frequency range are recoded to the signals of the third frequency range while retaining the data transmission rate.