Dial tone apparatus for the call waiting

통화대기시 재통화 발신음장치

Abstract

The apparatus for generating a dial tone of recall includes a standby selection switch switching a ring signal and audio signal of receiving part and transmitting the signals to a transmitting and receiving portion, a recall dial tone generator for generating a recall dial tone through a ring signal generater and speaker by detecting a receiving sound output from the transmitting and receiving portion during standby state, a switch for on/off controlling the recall dial tone generator using the power from a power supply, and a standby instructor for visually displaying the recall by switching the voltage of the power supply and turning on or off a lamp.
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