A system and method for providing a Voice-over-Internet Protocol (VoIP) system is disclosed. The VoIP system includes a network including at least two VoIP proxy servers configured to shift workload automatically and to allow voice data to be transmitted and received over the network and at least one...http://www.google.com.tw/patents/US20030123432?utm_source=gb-gplus-share專利 US20030123432 - Method and system for automatic proxy server workload shifting for load balancing
