Joe A Morris

US Patent:

8111614, Feb 7, 2012

Filed:

Nov 29, 2007

Appl. No.:

11/987293

Inventors:

David E. Feuer - Bergenfield NJ, US
David Lando - West Orange NJ, US
Joe Morris - Monsey NY, US

Assignee:

Net2Phone, Inc. - Newark NJ

International Classification:

H04L 12/66

US Classification:

370220, 370218, 370221, 370386

Abstract:

During normal operation, a user terminal supported by an IP-PBX server establishes a call by resolving the name of the IP-PBX server using a DNS server. When the DNS server provides the address of the IP-PBX server, the IP-PBX server can be contacted. However, if the SIP controller learns that the IP-PBX is no longer operating, the information stored by the service provider environment may be used to build or configure an IP-Centrex server at a remote site which takes over for the failing IP-PBX server. The newly configured IP-Centrex server then registers itself with the SIP controller and either the SIP controller or the IP-Centrex server then informs the DNS server of the IP address of the IP-Centrex and tells the DNS server that the IP-Centrex server will respond to messages for the failed IP-PBX server. The newly configured IP-Centrex server then handles the messages and control flow previously handled by the IP-PBX server. When the IP-PBX server is repaired or replaced, the IP-PBX server informs the SIP controller that it is back online and either the SIP controller or the IP-PBX server then informs the DNS server that the IP-PBX server will again be handling the call requests for the IP-PBX server.