PURPOSE: To surely confirm mobile body invasion information by combining a telephone outgoing signal setting device, an automobile telephone system, a pocket bell device, and a voice output device.

CONSTITUTION: The telephone outgoing signal setting device A starts up a specific telephone number setting circuit a3 with a signal detected with a mobile body detection circuit a1, and transmits a specific signal via an external output terminal a4. The automobile telephone system B calls an automobile telephone with the specific signal transmitted from the specific telephone number setting circuit a3, and also, transmits a pocket bell call signal. The pocket bell device C calls a pocket bell with the automobile telephone system B, and also, transmits the specific signal, and the voice output device D outputs prescribed voice from a speaker d4 with the specific signal.