JPS6051049A - Automatic dialing device - Google Patents

Abstract

PURPOSE:To enable to recognize reply of a remote telephone subscriber by adding reply indicating tone by output of a polarity inversion detecting section and a polarity inversion detecting section having the same input with a monitoring circuit. CONSTITUTION:At first, a telephone circuit 1 is connected to a monitoring circuit 7 by bringing down a circuit change-over switch 2 and a change-over switch 5 to lower side in the figure and audible sound of 400Hz received from the circuit is generated in the circuit 7. Then, the switch 5 is changed to upper side, and the circuit 1 is connected to an automatic dialing section 6, and dial transmission is performed. After completion of the transmission, the switch 5 is changed again to lower side to connect the circuit 1 to the monitoring circuit 7. Consequently, audible sound modulated by 16Hz received from the circuit 1 is generated from the circuit 7. When the object of telephone makes a reply, the ringing tone is stopped, and at the same time, DC loop polarity of the circuit 1 is inverted, and accordingly, the polarity inversion detecting section 8 starts to operate a reply indicating sound generating circuit 9, and reply indicating sound is generated from the circuit 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to improvements in automatic dialing devices for telephones. In particular, the present invention relates to improvements in the additional functions of automatic dialing devices having a loudspeaker monitor circuit.

[Description of prior art]

Conventional automatic dialing devices with a monitor circuit confirm the response of the other party when making a telephone call by the voice of the other party generated from the monitor circuit, so the voice of the other party can be heard by people other than the caller himself/herself. In addition, if the volume of the monitor circuit is lowered to prevent others from hearing the voice of the person on the other end of the phone, the response of the person on the other end of the phone cannot be detected.

The present inventor has completed the present invention by noting that the above-mentioned drawbacks can be solved by incorporating a polarity reversal detection means and a means for generating a response display sound into this conventional device.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic dialing device that can notify that the called party has answered even if the monitor circuit is stopped or the volume is lowered while the handset is on the hook.

[Features of the invention]

The present invention detects the response of the other party by using the response display sound by adding a polarity reversal detection section that has the same input as the monitor circuit and a response display sound generation circuit that generates a response display sound based on the output of the polarity reversal detection section. We provide equipment that can.

More specifically, there is a line changeover switch that switches the telephone line to the telephone side when a call is received or on standby, a monitor circuit that monitors the audio frequency signal from the line as an acoustic signal when a call is made, and the telephone number of the other party. an automatic dialing section that automatically dials the phone; a loop detection circuit that monitors the on-hook or off-tack state of the telephone; and a second changeover switch that switches between the monitor circuit and the automatic dialing section to connect the telephone to a line. The dialing device includes a polarity reversal detection section that has the same input as the monitor circuit and detects polarity reversal of the line, and a response display sound generation circuit that generates a response display sound based on the output of the polarity reversal detection section,
The present invention is characterized in that a response from the other party can be detected by a response display sound.

[Explanation based on examples]

Next, an apparatus according to an embodiment of the present invention will be explained based on the drawings.

The figure is a block diagram of an apparatus according to an embodiment of the present invention.

In the device according to the embodiment of the present invention, a loop detection circuit 3 is connected to a line changeover switch 2 for switching signals from a telephone line 1, and a telephone set 4 is connected to this loop detection circuit 3.

Further, a changeover switch 5 is connected to the other contact of the line changeover switch 2, an automatic dial section 6 is connected to one contact of the changeover switch 5, and a monitor circuit 7 is connected to the other contact.

Here, the feature of the present invention is that this monitor circuit 7
A polarity reversal detecting section 8 for detecting the polarity of the loop DC current is connected to the input side of the loop DC current, and a response display sound generating circuit 9 is connected to the polarity reversing detecting section 8.

The operation of the apparatus according to the embodiment of the present invention configured as described above will be explained.

When making an automatic dialing call, first connect the telephone line 1 to the monitor circuit 7 by turning the line changeover switch 2 and the changeover switch 5 downward in the figure. The monitor circuit 7 generates a 400 Hz audible tone (dialing tone/dial tone) received from the telephone line 1.

Next, switch the selector switch 5 to the upper side of the diagram, and connect the telephone line 1.
is connected to the automatic dial section 6 to make a dial call, and when the dial call is completed, the selector switch 5 is again switched to the lower side in the figure to connect the telephone line 1 to the monitor circuit 7. Therefore, the monitor circuit 7 generates an audible tone (ring tone/ring bank tone) received from the telephone line 1 and modulated at 16 Hz.

Next, when the called party answers, this ringing tone stops and at the same time the DC loop polarity of the telephone line 1 is reversed, so the polarity reversal detection section 8 activates the response display tone generation circuit 9, and the response display tone generation circuit 9, a response display sound is generated.

Therefore, even if the volume of the monitor circuit 7 is lowered, the caller can know the response of the other party by the generation of the response display tone, and can respond without having the other party's voice heard by those around them. .

Note that the loop detection circuit 3 activates the line changeover switch 2 when the telephone 4 goes off-hook during the automatic dialing process.
is switched to the upper side of the figure, and is a circuit for connecting the telephone line 1 to the telephone set 4.

〔Effect of the invention〕

As explained above, according to the present invention, even if the monitor circuit is stopped or the volume is lowered, when the other party answers the telephone, this is detected by utilizing the fact that the DC loop polarity of the line is reversed. This allows you to know that the other party has responded. With the device of the present invention, it is possible to prevent others from hearing the voice of the person on the other end of the phone even if the handset is turned off.

[Brief explanation of drawings]

The figure is a block diagram of an apparatus according to an embodiment of the present invention. 1...Telephone line, 2...Line changeover switch, 3...
- Loop detection circuit, 4... Telephone, 5... Changeover switch, 6... Automatic dial section, 7... Monitor circuit,
8... Polarity reversal detection unit, 9... Response display sound generation circuit.

Claims (1)

[Claims] (1) A line changeover switch that switches the telephone line to the telephone side when a call is received or on standby; a monitor circuit that monitors the audio frequency signal from the line as an acoustic signal when a call is made; and a monitor circuit that monitors the telephone number of the other party. An automatic dialing device comprising: an automatic dialing section that automatically dials; a polarity reversal detecting section that detects; and a response display sound generation circuit that generates a response display sound depending on the output of the polarity reversal detection section. .