Patent ID: 7133923

Claim:
A system for screening a real-time transport protocol route advertisement communicated between adjacent Internet telephony administrative domains prior to comparing an advertised route to a policy, comprising: a database server confimired to store at least one policy, the at least one policy comprising attributes associated with one or more routes; and a plurality of session routers in communication with the database server and configured to determine a source of a real-time transport protocol route advertisement; when it is determined that a real-time transnort protocol route advertisement received at a respective session router is from an Internet telephony administrative domain managed by another administrative entity than the administrative entity that manages the respective session router, the session router is configured to perform destination screen of said route advertisement, wherein a destination address defined by said received route advertisement is compared to a destination address, and when it is determined that a real-time transport protocol route advertisement received at a respective session router is from the administrative entity that manages the respective session router, the session router is configured to perform an origin screen of said route information, wherein an origin address defined by said received route advertisement is compared to an origin address.