Patent ID: 8103240

Claim:
A communication system including an access point and a mobile wireless communication device, the access point authenticating, in response to a connection request from the mobile wireless communication device, the mobile wireless communication device based on registration information indicating each mobile wireless communication device connectable to a VoIP network, and establishing a connection to the VoIP network if the mobile wireless communication device is authenticated as authorized, the mobile wireless communication device comprising: a number receiving unit operable to receive an input of a phone number; a judging unit operable to judge whether the received phone number is a predetermined emergency number; and a connection requesting unit operable to, if the received phone number is judged to be the predetermined emergency number, select one access point from one or more access points, and send an emergency connection request indicating an emergency call to the selected access point, the one or more access points each being recognized as a connection target by the mobile wireless communication device, and each of the one or more access points comprising: a connection request receiving unit operable to receive the connection request from the mobile wireless communication device; and a connecting unit operable to, if the connection request received by the connection request receiving unit is the emergency connection request, establish the connection to the VoIP network without performing the authentication, wherein the mobile wireless communication device is both connectable to the VoIP network via the access point and to a phone network via one or more base stations, and the connection requesting unit first tries to connect to the phone network via at least one of the one or more base stations before trying to connect to the VoIP network via the access point, and selects the access point if unable to connect to at least one of the one or more base stations.