1. IETF, J. Rosenberg, et al.: SIP: Session Initiation Protocol, RFC 3261 (June 2002)
2. ITU-T, Recommendation H.323, Packet based Multimedia Communication Systems, version 4 (November 2000)
3. Bertin, E., Bury, E., Lesieur, P.: Next generation architectures: which roles for an incumbent operator? In: Proc. Eurescom summit (October 2002)
4. Bertin, E., Bury, E., Lesieur, P.: Operator services deployment with SIP: Wireline feedback and 3GPP perspectives. In: ICIN 2003, Bordeaux (April 2003)
5. Bertin, E., Bury, E., Lesieur, P.: Intelligence distribution in next-generation networks, an architectural framework for multimedia services. In: ICC 2004, Paris (June 2004)