JPH04335744A - Telephone system - Google Patents

Abstract

PURPOSE:To allow the telephone set to cope with a silent mischievous phone call by sending an attach tone to an opposite party of a line when a means detecting a voiced sound cannot judge the input from the telephone line to be a voiced sound. CONSTITUTION:A zero cross circuit 22 and a CPU 29 judge the presence of sound including a voiced signal. When the automatic answering telephone set makes attack to an incoming call after the telephone set replies the call from an opposite party, the telephone set hooks off for talking with the opposite party and when the user discriminates the call to be a mischievous call, the user depresses an attack button on a keyboard 9. A CPU 29 is set to a timer monitor state for a time stored in advance in a ROM. Then an output of the circuit 22 receiving a signal from a telephone line connection terminal 1 is monitored for prescribed time (e.g. 5sec). When the opposite party does not give a reply within 5sec and the timer expires, an attack message recorded in advance is sent in a path of recording reproduction circuit 17 line control circuit 3 connection terminal 1. Or the CPU 29 sends an unpleasant tone to the telephone line through a path of circuit 17 circuit 3 terminal 1 to cope with a silent mischievous phone call.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to telephone equipment, and more particularly to a telephone equipment equipped with means for protecting against prank calls.

0002

2. Description of the Related Art As a countermeasure against tampering with conventional telephones, telephone devices are known that are equipped with means for repelling tampering by recording the voice of the other party and sending it back.

0003

[Problem to be Solved by the Invention] However, all of these methods assume that the other party is speaking, and are not sufficiently effective when the other party is not speaking and the telephone is silent. Ta.

[0004] In order to eliminate these drawbacks, the present invention provides a telephone device that can respond to silent prank calls by sending out unpleasant sounds when the other party remains silent for a certain period of time. It is intended to.

[0005]

[Means for Solving the Problems] In order to achieve this object, a telephone device according to the first invention of the present application includes a line closing means for closing and opening a telephone line, a keyboard, a timer means, and a telephone. There is a means for detecting the presence of sound including voice input from the telephone line, and a means for transmitting a repelling sound to the telephone line, which is activated by operation of the keyboard and outputs the voice within a certain period of time determined by the timer means. If the means for detecting the presence of a sound including the sound cannot determine that the input from the telephone line is a sound presence, the means for transmitting the repulsion sound is configured to transmit a repulsion sound to the other party of the telephone line. ing. Further, the telephone device according to the second invention of the present application includes a line closing means for closing and opening a telephone line, a keyboard, a timer means, and a means for detecting a sound including voice input from the telephone line. , a means for recording audio from the telephone line, a means for transmitting playback sound to the telephone line, and a means for transmitting a repulsion sound to the telephone line, and the timer is activated by operation of the keyboard. If the means for detecting the presence of sound including the voice within a certain period of time determined by the means determines that the input from the telephone line is a presence of sound, the means for detecting the presence of sound including the voice of the other party is recorded and the content thereof is immediately played back. and transmits a repelling sound to the other party on the telephone line, and if it is not determined that there is a sound within a certain period of time determined by the timer means, a repelling sound is sent from the means for transmitting the repelling sound to the other party on the telephone line. It is configured as follows.

[0006]

[Embodiment] Fig. 1 shows an answering machine which is an embodiment of the device of the present invention.
), 2 is a diode bridge for polarity matching, 3 is a transistor circuit for DC connection (line connection means), 4 is a communication circuit, 5 is a receiver, 6 is a transmitter, 7 is a dial circuit, and 8 is a communication circuit. Power supply for circuit 4 and dial circuit 7, 9 is keyboard, 10 is keyboard interface (KB-I/F
), 11 is a hook switch, 12 is a capacitor for DC cut, 13 is a rectifier dial bridge, 14 is a tone ringer circuit, 15 is a transformer for DC separation, 16 is an incoming signal detection circuit, 17 is a recording/playback circuit, 18 is a speaker An amplifier, 19 a speaker, 20 a microphone, 21 a cassette deck, 22 a zero cross circuit (sound detecting means),
23 is a remote control signal receiver, 24 is a voice synthesizer for IC recording and playback, and 25 is a D-RA that records the analysis results of 24.
M, 26 is a fixed message IC, 27 is a liquid crystal display, 2
8 is an LED display, and 29 is a control circuit composed of a CPU, which includes a volatile storage element S-RAM and a non-volatile storage element ROM as storage elements. 30 is an input terminal of a power adapter of an external power supply, 31 is a power supply circuit that supplies power for each circuit operation, 32 is a T relay for monitoring the power supply and t is its contact, 33 is a control circuit 29 when the power is turned on/off.
34 is a constant current power supply.

First, when recording a response message, when the response message recording button on the keyboard 9 is pressed,
The signal is taken into the control circuit 29 via the keyboard interface KB-I/F10. Control circuit 29
operates the voice synthesizer 24 and D-RAM 25 to record a response message. The audio signal is [microphone 20
-> recording/playback circuit 17 and voice synthesizer 24], and the analyzed results are stored in the D-RAM 25.

First, a general automatic answering operation of, for example, an answering machine according to the present invention will be explained. When there is a call from the telephone office, the call signal is [connection terminal 1 → capacitor 12 →
Diode bridge 13→tone ringer circuit 14], and a ringing tone output is obtained. This output is input to an incoming signal detection circuit 16 via a transformer 15. Here, the power supply monitoring relay 32 is in operation while energized, and therefore its contact t is connected to the incoming signal detection circuit 16 side. The incoming signal from the tone ringer circuit 14 is converted into direct current by the incoming signal detection circuit 16 and output to the control circuit 29. When the control circuit 29 inputs this output and determines that the call is an incoming call from the telephone line, it operates the transistor circuit 3 for DC connection via the dial circuit 7 to create a DC loop for the telephone line. This is [connection terminal with telephone line 1 → diode bridge 2 → transistor circuit 3
→ communication circuit 4]. The control circuit 29 includes a voice synthesizer 24, a D-RAM 25, and a recording/playback circuit (R/P) 17.
The response message stored in the D-RAM 25 is sent to the telephone line. After converting the audio data in the D-RAM 25 into an audio signal by the audio synthesizer 24,
Recording/playback circuit 17 → Dial circuit 7 → Call circuit 4 → Transistor circuit 3 → Diode bridge 2 → Connection terminal 1]
route to the telephone line. The business message from the telephone line is recorded on the recording tape in the cassette deck 21 along the route of [connection terminal 1→diode bridge 2→transistor circuit 3→recording/playback circuit 17→cassette deck 21]. The message recording for the next incoming call will be recorded following the previous message recording.

The present invention will be explained in more detail based on the explanation of FIG. FIG. 2 shows an embodiment of the main parts of the present invention, in which 1 is a telephone line connection terminal (L1/L2), 3 is a line control circuit that closes and opens the line, 4 is a speech circuit, 5 is a receiver, 6 is a transmitter, 7 is a dial circuit, 17 is a recording/playback circuit, 21a
2 is a recording medium such as a voice synthesizer, 22 is a zero cross circuit (speech detection means) that outputs an output every time the input signal passes a predetermined level, and 29 is a circuit for obtaining the output from the zero cross circuit 22. A control circuit, that is, a microcomputer CPU 29, which judges the period, discriminates the type of signal, and controls the overall operation of the answering machine according to the type of signal, and has S-RAM and ROM,
It controls the closing and opening of lines, dial control, recording and playback, and timer setting and monitoring.

First, the specific operation of signal discrimination carried out by the zero cross circuit 22 and the CPU 29 will be explained. FIG. 3 is an explanatory diagram of the zero-cross circuit operation, and (a), (
b) is the input, (a'), (b') are (a), (
The output of b) is shown. If the zero-crossing threshold point is, for example, 0V, then the circuit will provide an output if the signal exceeds 0V. If the signal input at this time is busy, the signal frequency is 400 Hz and the period is 60 IPM (Inter/min). Therefore, the output is ON for 1.25ms and OFF for 1.25ms as shown in (a').
OFF), and this signal block becomes a 500m pulse.
Turns on/off every s. Also, if the signal input is audio,
As shown in (b), there is no regularity in the signal waveform. Therefore, its output also becomes a random pulse as shown in (b'). CPU
29 measures the period of this output, and the 400Hz signal is 0.
．． If it turns on and off every 5 seconds, it is determined to be a busy tone, and if the signal is irregular for a certain period of time, it is determined to be voice. In this manner, the zero-cross circuit 22 can determine the presence or absence of sounds including voices and the presence of busy sounds, so it can be used to detect whether or not there is a recording of a message on the answering machine.

Having explained that the zero-cross circuit 22 and the CPU 29 can determine the presence or absence of sound including voice, the operation according to the present invention will now be described. This will be explained below with reference to the flowchart of FIG. After answering the call from the other party, the answering machine goes off-hook and talks to the other party (S1), (S2). If you think it is a prank call, press the repel button provided on the keyboard 9 to start the repel operation (S3). The CPU 29 enters a timer monitoring state for a predetermined time stored in the ROM (S4), and [telephone line connection terminal 1→line control circuit 3→
The output of the zero-cross circuit 22 to which the line signal is input via the path of the recording/playback circuit 17 is monitored for, for example, 5 seconds. If there is a response from the other party within 5 seconds (S5) and it is possible to determine whether there is a sound from the line, such as a voice signal (S6), recording starts [telephone line connection terminal 1 → line control circuit 3 → recording] The audio signal is input through the path of the playback circuit 17], and the audio signal is input to the recording medium 2.
1a (S7). After recording for a specified period of time, playback is started, and the contents stored in the recording medium 21a are sent out via the route [recording/playback circuit 17→line control circuit 3→telephone line connection terminal 1] (S8). If the recording and reproducing operations do not reach five times, the process returns to (S4) and repeats the operations. When recording and playback operations reach 5 times (
Return to S2), detect on-hook and disconnect the line (
S9). Also, if there is no response from the other party within 5 seconds (S5) and the time is up, a fixed message, that is, a pre-recorded repulsion message is sent to the recording/playback circuit 1.
7→line control circuit 3→telephone line connection terminal 1]. Alternatively, the CPU 29 transmits the unpleasant sound through the route [recording/reproduction circuit 17→line control circuit 3→telephone line 1] (S10). Therefore, it is possible to respond to silent prank calls.

0012

As explained above, since the telephone device according to the present invention uses a voice detecting circuit, it has the advantage of being able to repel even silent prank calls.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the general configuration of an answering machine that is an embodiment of the present invention.

FIG. 2 is a block diagram showing an embodiment of essential parts of an answering machine according to the present invention.

FIG. 3 is a time chart for explaining the operation of a zero-cross circuit used in the present invention.

FIG. 4 is a flowchart for explaining the operation of the present invention.

[Explanation of symbols]

1　Telephone line connection terminal 2 Diode bridge 3. Transistor circuit for DC connection 4 Call circuit 5　Telephone receiver 6. Transmitter 7 Dial circuit 8 Power supply 9 Keyboard 10 Keyboard interface 11 Hook switch 12 Capacitor 13 Diode bridge 14 Tone ringer circuit 15 Transformer 16 Incoming signal detection circuit 17 Recording and playback circuit 18 Speaker amplifier 19 Speaker 20 Microphone 21　Cassette deck 22 Zero cross circuit 23 Receiver 24 Speech synthesizer 25 D-RAM 26 Fixed message IC 27 Liquid crystal display 28 LED indicator 29 Control circuit 30 External power supply input terminal 31 Power supply circuit 32 T relay 33 Reset circuit 34 Constant current power supply

Claims (2)

[Claims] 1. A line closing means for closing and opening a telephone line, a keyboard, a timer means, a means for detecting a sound including a voice input from the telephone line, and a means for detecting a sound input to the telephone line. The telephone line is activated by the keyboard operation, and the means for detecting the sound including the voice within a certain period of time determined by the timer means fails to determine that the input from the telephone line is a sound. In this case, the telephone device is configured to transmit a repelling sound from the means for transmitting the repelling sound to the other party on the telephone line. 2. Line closing means for closing and opening a telephone line, a keyboard, a timer means, a means for detecting sound including voice input from the telephone line, and a voice input from the telephone line. means for recording a sound, a means for transmitting a playback sound to the telephone line, and a means for transmitting a repulsion sound to the telephone line, which is activated by operation of the keyboard and within a certain period of time determined by the timer means. When the means for detecting the presence of sound including voice determines that the input from the telephone line is a presence of sound, it records the presence of sound including the voice of the other party and immediately reproduces the content to notify the other party of the telephone line. and if it is not determined that there is a sound within a certain period of time determined by the timer means, the telephone device is configured to transmit a repulsion sound from the means for transmitting the repulsion sound to the other party on the telephone line. .