PURPOSE: To dispense with intermediation by a third party by receiving a signal to specify a callee transmitted from an outgoing telephone terminal, and vocalizing a message to call the callee registered in advance.

CONSTITUTION: A bell 5 is rung by receiving a call signal received via a private branch exchange 16, and automatic response is issued, and a response message registered in advance is transmitted to the outgoing telephone terminal via the private branch exchange 16. The signal to specify the callee transmitted from the outgoing telephone terminal is received, and the message to call the callee registered in advance is vocalized. Therefore, a synthetic voice to specify the callee can be generated corresponding to the designation of a caller. In such a way, no intermediation work can be required.