The present invention discloses a method whereby the separate protocols: session initiation protocol SIP, resource reservation protocol RSVP, common open policy service COPS, and open settlement protocol OSP are used together to setup, maintain, and teardown Internet communications having an acceptable...http://www.google.se/patents/US6366577?utm_source=gb-gplus-sharePatent US6366577 - Method for providing IP telephony with QoS using end-to-end RSVP signaling
