Patent ID: 7792543

Claim:
A shared phone comprising: a short-range radio communication unit that detects a cellular phone located in a predetermined area, and performs short-range radio communication with the cellular phone so as to take in user information including a phone number assigned to the cellular phone from the cellular phone, the cellular phone being designed to perform public line communication with a base station outside the predetermined area; a user information storage unit that stores the user information taken in by the short-range radio communication unit; a public line communication unit that performs the public line communication with the base station so as to cause the base station to inform of an incoming call to the phone number to the shared phone, the public line communication between the public line communication unit and the base station being radio communication different from the short-range radio communication; a display unit that displays the user information stored in the user information storage unit when the incoming call is informed from the base station; and an operation unit that accepts an instruction for public line communication from a user, and sends the instruction to the public line communication unit to perform public line communication, wherein the public line communication unit performs the public line communication with the base station without the cellular phone according to the instruction, and the shared phone is a cellular phone.