Patent ID: 6324212
Filing Date: 2001-11-27
Classification: H04L

Abstract:
An apparatus for providing bidirectional Asymmetric Digital Subscriber Line (ADSL) data service and Plain Old Telephone Service (POTS) over a subscriber loop, comprising:an ADSL transceiver located in a local communication center for receiving ADSL data in a first direction from a remote source and loading the received ADSL data into predetermined tone bins for transmission over the subscriber loop to subscriber data equipment, and for receiving ADSL data in a second direction in the predetermined tone bins from the subscriber loop for processing the ADSL data for transmission to the remote source; anda control processor responsive to a detection of an origination of a POTS call for generating a first control signal that causes the ADSL transceiver to load ADSL data into tone bins which are only in a frequency band above a predetermined frequency band used for a POTS call for data transmissions over the subscriber loop, and responsive to a detection of a termination of a POTS call for generating a second control signal that causes the ADSL transceiver to load ADSL data into tone bins which are in both the predetermined frequency band used for a POTS call and the frequency band thereabove for data transmissions over the subscriber loop,wherein the ADSL transceiver comprises a Fast Fourier Transform/Inverse Fast Fourier Transform (FFT/IFFT) circuit wherein the IFFT circuit is responsive to the first control signal from the control processor for loading ADSL data into the tone bins in the frequency band above the predetermined frequency band used for the POTS call for data transmissions over the subscriber loop, and is responsive to the second control signal from the control processor for loading ADSL data into the tone bins which are in both the predetermined frequency band used for the POTS call and the frequency band thereabove for data transmissions over the subscriber loop.