| 摘要 |
To provide a technology of setting up a call at a high efficiency by a location management device's sending notification of a call setup request to a call control device corresponding to a location of a callee communication device. A call control device connected to a location management device via a network receives a call setup request, searches a location data table for location information of a callee communication device in response to the call setup request, sets up, when the location information is searched out as a result of the search, a call on the basis of the location information, and notifies, when the location information is not searched out as the result of the search, the location management device of the call setup request. The location management device receives notification of a call setup request from the call control device, refers to a storage unit stored with management information specifying which call control device controls the call targeted at each callee communication device, and notifies, of the call setup request, the call control device that controls the call to the callee communication device at which the call setup request is targeted on the basis of the management information referred to.
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