http://www.eurescom.de/public/projects/P1100-series/P1111/default.asp

This project was funded by various telecommunication companies in Europe including Deutsche Telecom, Telecom Italia, Elisa Communication, OTE and France Telecom. The major goal of the project was to investigate the major problems hindering a vast and fast deployment of SIP such as QoS and NAT traversal, provisioning of intelligent services over SIP and demonstration of SIP based services. The project finished in 2001.