A CALLING METHOD FOR NODE ACROSS ZONES IN IP NETWORK SYSTEM

摘要

This invention relates to a calling method for node across zones in IP network system, which can realize addressing and call of node across gatekeeper zones simply and conveniently. This method includes: each E.164 alias of H.323 node in gatekeeper is registered on each gatekeeper (GK) in IP network system in advance, the alias is composed of unique prefix zone number in IP network system and unique node code in gatekeeper (GK); the H.323 calling node directly calls the called node with E.164 alias of called node; the calling node extracts prefix number from alias of the called node, sends the request to the called GK for parsing address of the called node; the called GK will return the parsed address of the called node to the calling GK; the calling GK will inform the calling node of IP address for the called node; the calling node send the SETUP command to the called node according to the IP address and begin calling.