Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2006-11-28
2006-11-28
Phan, Man U. (Department: 2616)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S286000, C370S401000, C379S406010
Reexamination Certificate
active
07142533
ABSTRACT:
A cascaded signal processing arrangement processes digitally encoded voice samples transported over a time division multiplex (TDM) communication path for application to a processor-controlled digital communication device, in particular an integrated access device. Processed voice samples are packetized in accordance with an encapsulating protocol and transmitted as a packetized voice output stream to a destination receiver device. The arrangement includes an echo canceller coupled to the TDM communication path and performing echo cancellation processing on the digitally encoded voice samples. The echo cancellation-processed voice sample signals are compressed by a data compression operator and applied to a packet encapsulating host processor via the TDM communication path. This obviates the necessity of the host processor having to use data bus cycles to download processed digitized voice samples.
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Ghobrial Ayman
Greer Jerry Lynn
McElroy Paul Graves
Mitchell Bruce Edward
Adtran Inc.
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Phan Man U.
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