| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a call routing method and a call routing system which surely can attain a call routing to a destination by reducing burdens of a relay server. <P>SOLUTION: The call routing method includes: a step of transferring a call setting request message to a relay server when a destination address included in the call setting request message transmitted from a calling terminal is not a terminal stored in a subscriber session control server itself; a step of allowing the relay server to transfer the call setting request message to a number management means without referring to a destination address; a step of allowing the number management means to return a redirect message including a logical address and a table number corresponding to the destination address to the relay server; a step of transmitting the call setting request message to a terminating side subscriber session control server corresponding to the logical address redirected to the relay server; and a step of transferring the call setting request message received by the terminating side subscriber session control server to a terminating terminal. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
