Method for supporting high priority calls on a congested WAN...

Multiplex communications – Data flow congestion prevention or control – Flow control of data transmission through a network

Reexamination Certificate

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C370S236100, C370S236200, C370S237000, C370S238000, C370S238100, C379S221010, C379S022020, C379S221030, C379S221060

Reexamination Certificate

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06977898

ABSTRACT:
A network node is configured to negotiate for connections for high priority calls (e.g., voice calls) received at the node in the face of otherwise congested outbound communication links. The negotiation is conducted in a fashion that will preserve connections for existing calls associated with the node. For example, the negotiation may be conducted so as to cause one or more of the existing calls to consume less bandwidth over the outbound communication links than was consumed at a time prior to reception of the high priority calls. Such negotiations may be initiated depending on the availability of codec resources and/or compression schemes at the node and may be conducted using OAM cells.

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