Patent ID: 9154529
Filing Date: 2015-10-06
Classification: H04L,H04M

Abstract:
1. A redundant Session Initiation Protocol (SIP) call center system comprising: a first and a second SIP server located at a first data center and cooperating as a first SIP-server high availability (HA) pair, wherein the first SIP server is a first primary SIP server and the second SIP server is a first backup SIP server; a third and a fourth SIP server located at a second data center geographically remote from the first data center and cooperating as a second SIP server high availability (HA) pair, wherein the third SIP server is a second primary SIP server and the fourth SIP server is a second backup SIP server; wherein the first and second SIP-server HA pairs operate as SIP server peers having active-active redundancy, wherein agent SIP phones are configured to maintain simultaneous registration with the SIP server peers, wherein a first SIP server peer of the SIP server peers receives data from an agent application for logging in an associated agent to the first SIP server peer without logging the agent to a second SIP server peer of the SIP server peers, wherein the SIP server peers collaborate to deliver calls to a SIP phone of the associated agent via the first SIP server peer where the agent is logged in for handling by the agent, and wherein, in response to detecting a failure of primary and backup SIP servers corresponding to the first SIP server peer, the second SIP server peer receives the data from the agent application for logging in the associated agent to the second SIP server peer for continued operation of the agent in handling calls.