Patent ID: 7590105
Filing Date: 2009-09-15
Classification: H04L,H04M

Abstract:
1. A system comprising: a plurality of modems configured to demodulate subscriber data from a subscriber link to generate a digital steam comprising the subscriber data, the subscriber data comprising voice data, signaling data, and user data, the subscriber data routable via a plurality of networks; a plurality of digital filters configured to separate the voice data from the digital stream absent a digital data link failure, each of said plurality of digital filters communicatively coupled to a corresponding modem of said plurality of modems; a time division multiplexer adapted to receive a plurality of voice signals from said plurality of digital filters absent the digital data link failure, said time division multiplexer communicatively coupled to a bus adapted to receive time division multiplexed signals; a plurality of line cards, each of said plurality of line cards communicatively coupled to the corresponding modem of said plurality of modems, each of said plurality of line cards adapted to receive the voice data routed to said plurality of line cards responsive to the detected digital data link failure, each of said plurality of line cards adapted to convert the voice data into a digital format, each of said plurality of line cards adapted to transmit the voice data in digital format via the bus adapted to receive the time division multiplexed signals; and a termination subsystem communicatively coupled to said plurality of modems, said termination subsystem comprising a line monitor programmed to monitor a condition of the subscriber link.