A communication system of the present invention includes a mobile phone 100 and an access point. The mobile phone 100 comprises an input receiving unit 110 operable to receive a predetermined emergency phone number, and a control unit 160 operable to, if the input receiving unit 110 receives the predetermined emergency number, select one of access points which can be recognized by signals obtained by a wireless communicating unit 150 from the access points around the mobile phone 100, and cause the wireless communicating unit 150 to transmit an emergency connection request including a call destination phone number to the selected access point. The access point comprises a wireless communicating unit 220 operable to receive the emergency connection request from the mobile phone 100, and a control unit 240 operable to, if the wireless communicating unit 220 receives the emergency connection request, connect the mobile phone 100 to an IP network via an IP network communicating unit 230, without performing authentication of the mobile phone 100.