1. The Click Modular Router Project, http://www.pdos.csail.mit.edu/click
2. MUSE (Multi-Service Access Everywhere). IST European Project, http://www.ist-muse.org
3. 3GPP TS 23.228: IP Multimedia Subsystem, Stage 2, Release 6 (January 2003)
4. Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M., Shooler, E.: IETF RFC 3261. SIP: Session Initiation Protocol (June 2002)
5. DES/TISPAN-02007-NGN-R1 NGN Functional architecture for NGN Release 1