Patent ID: 7403534

Claim:
A method of implementing an IP telephone gatekeeper system, wherein two or more gatekeepers are connected to each other, so as to form a whole gatekeeper group which is regarded as a single gatekeeper system by the controlled gateways, in which the gatekeepers can substitute and backup mutually, said method comprising the following steps: 1) synchronizing the data of the gatekeepers in the gatekeeper group by means of synchronization; 2) transferring the status variation of the gateways controlled by the gatekeeper group among the gatekeepers in the gatekeeper group for synchronization; and 3) mapping from a single gatekeeper name of the gatekeeper group to multi-gatekeepers in the gatekeeper group by: a. before sending a Gatekeeper Request (GRQ) message to a gatekeeper, a gateway obtaining a list of gatekeeper addresses through a domain name resolution system, and choosing a gatekeeper with the highest priority to send the GRQ message according to the static priority sequence preconfigured in the Domain Name Server (DNS); b. the gatekeeper that has received the GRQ message returning a list of available gatekeepers sorted by load with a Gatekeeper Confirm (GCF) message according to the load condition of the members in the gatekeeper group within a period; and c. the gateway choosing a gatekeeper with a lower load to send a Register Request (RRQ) message to it according to the load condition of the list of available gatekeepers received.