Avaya Inc.

Benjamin Jenkins

Gordon Richards Brunson

Mehmet Balasaygun

Frank John Boyle

Al Baker

Pamela J Lauber

Thomas Anthony Petsche

Mehmet C Balasaygun

Frank J Boyle

Al Bakar

Provided are methods, devices, and systems for maintaining a SIP survivable network. The present invention is adapted to allow SIP endpoints or User Agents to discover and select the controller or controllers that the SIP endpoint will register with. Selection of the controller or controllers may be based upon the relative attributes of the controllers and the needs of the SIP endpoint.

Simultaneous active registration in a SIP survivable network configuration

Provided are methods, devices, and systems for maintaining a SIP survivable User Agent. The present invention is adapted to allow the User Agent to detect the status of the network, thus providing the User Agent to perform failover/failback operations. The User Agent may be adapted to determine the status of the network based on its own monitoring mechanisms and/or based on messages received from other network components.

Survivable phone behavior using SIP signaling in a SIP network configuration

Provided are methods, devices, and systems for maintaining a SIP survivable network. The present invention may utilize messages, such as SIP NOTIFY messages, to trigger various network components to failover and failback based on the determined status of the SIP network.

Failover/failback trigger using SIP messages in a SIP survivable configuration

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Zionsville, IN, United States of America

Benjamin Jenkins