Method and system for supporting serverless VoIP service are provided. Network information of a first device and a second device is exchanged through a telecommunication network. A VoIP connection between the first and second devices can be established through an internet based network according to the...http://www.google.com.tw/patents/US7519075?utm_source=gb-gplus-share專利 US7519075 - Method and system for serverless VoIP service in personal communication network
