Multiplex communications – Duplex – Transmit/receive interaction control
Reexamination Certificate
2006-10-10
2006-10-10
Ngo, Ricky Q. (Department: 2663)
Multiplex communications
Duplex
Transmit/receive interaction control
C379S003000, C379S406010, C370S287000
Reexamination Certificate
active
07120130
ABSTRACT:
An echo cancelling system comprises a system controller for directing inbound and outbound PCM signals to one of two echo canceller modules. The system controller receives status information from the echo cancellers and maintains state information pertaining to the active echo canceller, in order to allow seamless switchover from one echo canceller to the other without interrupting service.
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patent: 6430162 (2002-08-01), Reese et al.
patent: 6590961 (2003-07-01), Gulli et al.
patent: 6665402 (2003-12-01), Yue et al.
Bina Bruce M
DeBruyn William P
Housel Timothy R
Sagerian Steven M
Hamilton Brook Smith & Reynolds P.C.
Ngo Nguyen H.
Ngo Ricky Q.
Tellabs Operations Inc.
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