A Media Gateway proxy receives a message and parses the message. The message contains an attribute, sub-command, and a destination address. The proxy stores the message and the attributes. Each of the attributes corresponds to a selected one of a plurality of Media Gateways. Each of the gateways has...http://www.google.com/patents/US6766377?utm_source=gb-gplus-sharePatent US6766377 - Media gateway proxy
