| 摘要 |
<p>This invention relates to the field of IP telephony. More particularly, this invention is a method and system for selecting gateways for routing calls through a packet based telecommunications network interconnected with a public telecommunications network. This invention is a method and system for dynamically detecting available gateways (110a, 110b), dynamically removing failed or unavailable gateways (110a, 110b), and automatically recovering failed or unavailable gateways after a predetermined period of time. An embodiment of this invention comprises two user agents (102, 103) within two telephony systems (114a, 114b) that are connected to an IP network (112); a plurality of gateways (110a, 110b); an IP telephony proxy server (106); an IP redirect server (104); and a network management system (108).</p> |
