4. Multiplex communications
  5. Pathfinding or routing
  6. Through a circuit switch

Zhone Technologies, Inc.

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Acoustic echo processing system

Telephonic communications – Echo cancellation or suppression – Using digital signal processing
Reexamination Certificate

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Flexible SONET access and transmission system

Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate

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Flexible SONET access and transmission systems

Multiplex communications – Pathfinding or routing – Through a circuit switch
Reexamination Certificate

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Mechanism for 1:1, 1+1, and UPSR path-switched...

Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate

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System for real time voice quality measurement in voice over...

Multiplex communications – Diagnostic testing – Determination of communication parameters
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