Patent ID: 6404774
Filing Date: 2002-06-11
Classification: H04L,H04Q

Abstract:
A method of providing both Plain Old Telephone Service (POTS) and Asymmetric Digital Subscriber Line (ADSL) data service over a common subscriber loop providing a predetermined frequency spectrum for transmission purposes, where the ADSL data service makes use of a multiplicity of quadrature modulated tones separated in frequency from one another across the predetermined frequency spectrum, and POTS makes use of only a portion of said predetermined frequency spectrum, the method comprising the steps of:(a) using the portion of the predetermined frequency spectrum for POTS while a POTS call is in progress; (b) excluding the ADSL data service from at least the portion of the predetermined frequency spectrum and reducing the number of tones while a POTS call is in progress; and (c) expanding the ADSL data service into the portion of the predetermined frequency spectrum and increasing the number of tones while a POTS call is not in progress.