Method and system for dynamically inverting an asymmetric...

Details Method and system for dynamically inverting an asymmetric... Method and system for dynamically inverting an asymmetric...

2005-05-03

2005-05-03

Chin, Stephen (Department: 2634)

Pulse or digital communications

Transceivers

Modems

C370S431000, C370S485000, C370S276000, C370S468000, C379S093080

Reexamination Certificate

active

06888884

ABSTRACT:
A method and system for dynamically inverting an A symmetric Digital Subscriber Line (ADSL) system. The ADSL system includes a central exchange equipment (CE) connected to a service provider network and a user equipment (UE) connected to a user workstation. The CE and UE are interconnected by a PSTN link. The CE includes an ADSL transceiver and a splitter coupled between the CE transceiver and the PSTN link. The splitter includes a low-pass filter for separating low frequency voice signals from high frequency ADSL signals transmitted from the UE. In accordance with the method of the invention, an invert request message encoded as a tone sequence is generated by the UE and transmitted to the CE over the PSTN link. The tone-encoded invert request is received through the CE splitter low-pass filter and is decoded utilizing a tone decoder communicatively coupled between the CE splitter low-pass filter and the CE transceiver.

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