Patent ID: 7352776

Claim:
Line terminating device for a subscriber line which transmits and receives broadband signals via a single subscriber line, a broadband signal being composed of a broadband or narrowband audio-frequency voice signal and a broadband higher-frequency data signal and the frequency bands of the voice signal and of the data signal essentially not overlapping, having a digital frequency separating filter which separates the audio-frequency voice signal and the higher-frequency data signal from each other, said digital frequency separating filter being in the digital section of the line terminating device and having a first digital low-pass filter and a first digital high pass filter, said line terminating device having a analog/digital converter which converts a broadband received signal into a digital received signal, and a digital/analog converter which converts a digital transmit signal into a broadband transmit signal, and the digital frequency separating filter follows the analog/digital converter and precedes the digital/analog converter and separates the digital received signal into a first digital voice signal and a first digital data signal and combines a second digital voice signal and a second digital data signal to form the digital transmit signal, the first digital low-pass filter and the first digital high-pass filter being supplied with the digital received signal, the digital frequency separating filter having a second digital low-pass filter, a second digital high-pass filter and a digital adder, the second digital voice signal being supplied to the second digital low-pass filter, the second digital data signal being supplied to the second digital high-pass filter and the digital adder adding the output signal of the second digital low-pass filter and of the second digital high-pass filter to form the digital transmit signal.