Adaptable hybrid and selection method for ADSL modem data...

Pulse or digital communications – Transceivers – Modems

Reexamination Certificate

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Reexamination Certificate

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07123651

ABSTRACT:
A method of operating a modem generally comprising the steps of (A) transmitting an invalid signal from the modem at each of a plurality of settings for an echo cancelling hybrid of the modem, (B) calculating a plurality of merit values each in response to an echo signal received by the modem in response to the invalid signal, and (C) adjusting the echo cancelling hybrid to a particular setting of the settings determined from the merit values.

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“Transmission Systems and Media—Asymmetrical Digital Subscriber Line (ADSL) Transceivers”, ITU-T, Draft G.992.1 (ex: G.dmt), Mar. 29, 1999, 240 pages.
“Silicon Laboratories Enters DSL Market with High-Performance Integrated ADSL Analog Front End”, Published by Silicon Laboratories Inc., Austin, TX, May 21, 2001, 3 pages.

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