Patent ID: 8239705
Filing Date: 2012-08-07
Classification: H04L

Abstract:
1. A primary session border controller, comprising a memory coupled to a controller, wherein the controller is operable to: receive a session initiation protocol message from a user endpoint device requesting communication services, wherein the user endpoint device is communicatively coupled to a backup session border controller, and wherein the user endpoint device is configured to register with the backup session border controller responsive to receiving an error message from the primary session border controller that causes the user endpoint device to perform a failover registration to the backup session border controller; forward the session initiation protocol message to a network element of a primary Server office; receive, from the network element, a first error message that when provided to the user endpoint device causes the user endpoint device to perform a failover registration to the backup session border controller; determine from the first error message that the primary Server Office is temporarily out of service and invoking the failover registration is not required; replace the first error message with a second error message, wherein the second error message indicates a temporary unavailability of communication services and does not invoke the failover registration; and transmit the second error message to the user endpoint device to avoid causing the user endpoint device to register with the backup session border controller.