SYSTEM AND METHOD FOR OUT-SOURCING THE FUNCTIONALITY OF SESSION INITIATION PROTOCOL (SIP) USER AGENTS TO PROXIES

摘要

Session Initiation Protocol (SIP) is used to communicate with Network-capabl e appliances (340). In a system employing SIP, a remote user agent client (UAC ) sends a message over the Internet via a Proxy server (320) to a user agent server at the location of the appliances (340), e.g., the client's home. Thi s communications channel allows the client to control the appliances and to determine their status. The Proxy server (320) between the UAC and a plurali ty of UAS processors has the address mapping, authentication, authorization and/or translation functions out-sourced from the UAS processors to the Prox y server (320) connected to them.