METHOD AND APPARATUS FOR THE GENERATION OF ANALOG TELEPHONE SIGNALS IN DIGITAL SUBSCRIBER LINE ACCESS SYSTEMS

摘要

A method and apparatus for providing analog telephony services over a digita l subscriber loop access system is presented including Asymmetric Digital Subscriber Loop (ADSL) utilizing spectrum above the POTs band for data services. An ATM (110) cell is utilized on an ADSL linecard (160). Echo cancellation is used to enhance the voice quality in compressed voice signal s. The ATM cells can be transmitted to a subscriber residence (190) or a busine ss and one to four additional analog telephone lines allowing first telephone line to be operated as an analog connection over the twisted wire pair (180) .