Patent ID: 7756115
Filing Date: 2010-07-13
Classification: H04L

Abstract:
1. A method for providing a stateless Session Interface Protocol (SIP) back to back user agent (B2BUA) comprising: receiving a SIP message; determining if said SIP message is a SIP request; determining if said SIP message is a SIP response; transforming one or more determined said SIP request, a first record-route header being inserted into selected SIP requests to a user agent server; transforming one or more determined said SIP response, wherein transforming SIP messages replaces SIP dialog state information in each transformed message, said first record-route header being inserted into selected SIP responses to a user agent client, said first record-route header including Uniform Resource Identifiers (URIs) from an original said SIP dialog state information; transmitting each said transformed SIP request to a new destination; and transmitting each said transformed SIP response to a request originator.