KR920008756B1 - Device of preventing hook-off - Google Patents

Abstract

The apparatus is for receiving ringing signal even when a handset is not in stand-by mode by alarming the user and opening the loop of a telephone when voice signal isn't detected for a certain time or hook-signal of receiving-off is detected. It includes a ring detector (4), a microprocessor (11) for detecting fault signal sound, a hook switch controller (5) for interfacing the signals transmitted by telephone exchanges according to control signal from the microprocessor (11), a loop controller (10) for controlling the loop of telephone wire, the 1st and 2nd amplifiers (20,21), and an alarm sound regulator (22) for regulating the output of the 2nd amplifier (21) and outputting to a speaker (23).

Description

Phone alerting device and method that can be received regardless of handset location

1 is a system configuration diagram of a conventional telephone.

2 is a system configuration diagram of a telephone according to the present invention.

3 is a detailed circuit diagram of FIG.

Fig. 2 shows the input and output waveforms of Figs.

5 is a signal flow diagram for the operation description of FIG.

* Explanation of symbols for the main parts of the drawings

3: rejection of tone ring 4: ring control unit

5 Hook switch control unit 6 Ring reception detection unit

7: keypad part 8: dialer part

9: Telephone line loop and pulse dial control unit 10: Loop control unit

11: microprocessor 12: warning sound power supply

13: warning sound transmitting part

The present invention relates to a telephone capable of receiving a call even when the handset is incorrectly placed, not during a call. In particular, a reception-off hook signal transmitted from an electronic switchboard when the handset is not placed at a predetermined position due to carelessness (RECEIVER OFF) HOOK) and a telephone alerting apparatus and method capable of receiving a call regardless of the handset position to detect the presence or absence of a voice signal in a call state and control a telephone loop at the same time as a warning sound.

Conventional telephones, as shown in Figure 1 of the accompanying drawings, the handset is switched in accordance with the state placed in a predetermined position of the phone hook hook 100 for interfacing the various transmission signals of the telephone station through the ring terminal (RING) and And a rectifier 101 for rectifying various signals of a telephone station inputted from the hook switch 100 and the tip terminal TIP, and a ring connected to the ring terminal RING and the tip terminal TIP to generate a ring signal. Transmitter and receiver 103 for converting the electrical signal through the generator 102 and the rectifier 101 into a voice signal and outputting it to a handset, and converting the voice signal input from the handset into an electrical signal and transmitting it to a telephone station. And a dialing section 104 for generating a dialing signal and transmitting the dialing signal to the telephone station according to the user's key selection.

In the conventional telephone configured as described above, when a ring signal is transmitted from the telephone station while the handset is placed in the normal position of the telephone, the ring signal is ring-producing unit 102 of the telephone line through the CO line, the ring terminal (RING), and the tap terminal (TIP). ) Will ring. At this time, since the hook switch 100 is turned on (short) when the receiver picks up the handset of the telephone, the electrical signal corresponding to the voice signal of the talker is rectified by the rectifier 101 through the hook switch 100 described above. Input to 103, the handset 103 converts the input electrical signal into a voice signal and outputs it to the handset, thereby making a call. After the end of the call, if the handset is normally placed on the phone, the hook switch 100 is turned off (open state) and the call is completed. In addition, when the caller lifts the handset to make a call, the hook switch 100 is turned on in the same manner as described above, and when the caller receives a call from the other party after dialing the other party's telephone number through the dialing unit 104, Through 103, the voice signal is converted into an electrical signal and transmitted to the trunk line through the rectifying unit 101, the hook switch 100, the ring terminal RING, and the tap terminal TIP. When the call is over and the handset is normally placed on the phone, the hook switch 100 is opened and the call is completed.

However, such a conventional telephone is not dialed within a certain period of time if the handset is down while not in a call, that is, if the handset is incorrectly placed on the telephone after the call is over, or if the handset is held for the purpose of using the telephone. In this case, the hook switch is kept short, so the telephone company judges that the call is continuously being made, and by not sending a ring signal, the incoming call is not made. For this reason, many side effects and malfunctions are caused by the telephone exchange. There was a problem caused.

Accordingly, an object of the present invention is to detect the reception off hook signal transmitted from the electronic switchboard when the handset is not placed in the predetermined position of the telephone due to user's carelessness, and to detect the presence or absence of the voice signal in a call state, and thus the voice signal is a predetermined time. The present invention provides a telephone alerting apparatus and method for opening a telephone loop at the same time as a warning sound and detecting a reception off hook signal when the signal is not detected within the receiver.

The purpose of the present invention as described above is to detect the presence or absence of voice signals of the sender, the receiver, and the switching station for a certain time in the on / off state of the hook switch before and after the call, and the entire system of the telephone according to the detected signal. A microprocessor for controlling an operation, a hook switch controller for driving various signals transmitted from an exchange station by driving in accordance with a control signal of the microprocessor, a loop control unit for controlling a loop of a telephone line in accordance with a control signal of the microprocessor; A telephone line loop and a pulse dial controller for intercepting a telephone line in a state in which the handset is incorrectly placed according to an output signal of the loop control unit and interfacing an output signal of a hook switch controller by connecting a telephone line; Voice signal from telephone line loop and pulse dial controller And a speech network unit for transmitting the voice signal of the handset, a speech detection unit for detecting the presence or absence of the output voice signal of the speech network unit, and inputting it to the microprocessor, and detecting an abnormal signal sound of the switching station output from the speech network unit. And a warning sound shaping unit for shaping a warning sound signal for generating a warning sound according to a control signal of the microprocessor, and outputting a warning sound signal to the speaker.

Still another object of the present invention is a first step of searching for a hook switch state and the presence or absence of a ring signal input, a second step of searching for a hook off if the hook switch is input if the search result is a ring signal, and a passing state if the hook is off. A third step of searching for the presence or absence of an abnormal signal tone from the switching center, and a fourth step of retrieving the presence or absence of an audio signal for a predetermined time in a call state if the abnormal signal tone is not detected as a result of the search; If the hook switch is hooked off, the fifth step of searching for the presence of a dial key for a predetermined time and determining whether the hook switch is hooked for a predetermined time; If there is no voice signal or dial key input, open the telephone line to make a call and set the wrong hook switch due to the warning sound. It is achieved by the sixth step to turn on, described in detail below with reference to the accompanying drawings of the present invention.

2 is a system configuration diagram of the telephone according to the present invention, and FIG. 3 is a detailed circuit diagram of FIG. 2. As shown in FIG. 2, the input AC power supply is dropped, and the dropped voltage is converted into a DC voltage. A power supply unit 16 for supplying the operation power of a predetermined level to the power supply, an emergency power supply unit 17 for charging the power supplied from the power supply unit 16 to supply the operation capacity to the entire telephone system in case of power failure, and a tip terminal (TIP). Ringing the call signal of the exchange station rectified and output from the first and second rectifying unit (1) (2) and the second rectifying unit (2) for rectifying various transmission signals of the switching station input from the ring terminal (RING). A tone ringer 3 for converting and outputting a signal, a ring control unit 4 for adjusting the ring signal level of the tone ringer 3 to be output to the seeker 23, and an output signal of the tone ringer 3 Ring signal is detected by turning on / off the photocoupler 6a. According to the ring reception detection unit 6 and the ring signal detected by the ring reception detection unit 6, the hook switch transmits and receives the voice signal, the presence or absence of a voice signal, and the exchange station for a predetermined time in the on / off state and the call state of the hook switch. The microprocessor 11 which detects a beep and controls the entire system operation of the phone according to the key input or non-key input of the keypad unit 7, and drives according to the control signal of the microprocessor 11 to be transmitted from the switching center. Hook switch control unit 5 comprising hook switches SW1, resistors R15 (R41-R44), and transistors Q13 (Q14) for receiving various signals through the first rectifying unit 1 and interfacing them with the microcontroller. A loop controller 10 comprising diodes D13 and D14, a capacitor C19, a resistor R45, and a transistor Q26 for controlling the loop of the telephone line according to the control signal of the processor 11, and the loop controller The handset is placed incorrectly according to the output signal of (10). In the state, if the telephone line is cut off and placed in the normal position, the telephone line is connected to the resistors R47-R49, the capacitor C64, and the transistors Q15 and Q16 that interface the output signal of the hook switch control unit 5. A telephone line loop and pulse dial control unit 9, an alarm sound power supply unit 12 that is switched on / off according to a control signal of the microprocessor 11 and outputs a warning sound signal of the microprocessor 11, and a telephone line Speech network unit 18 for transmitting the voice signal of the loop and pulse dial control unit 9 and the warning sound of the warning sound power supply unit 12 to the handset 19 and transmitting the voice signal of the handset to the telephone line, and the speech network The microprocessor 11 detects whether the amplification unit 20 amplifies the output voice signal of the unit 18 to an arbitrary level, and whether or not the voice signal is input from the speech network unit 18 output from the first amplifier 20. ) A voice detector 15 to be input, a tone detector 14 to be input to the microprocessor 11 for detecting abnormal signal tones of the switching center output from the spitz network unit 18, and a control signal of the microprocessor 11 Warning sound output unit 13 for generating a warning sound, a second amplifying unit 21 for amplifying the warning sound signal of the warning sound output unit 13 to an arbitrary level, and an output warning sound of the second amplifying unit 21. Is configured as a warning sound shaping unit 22 for outputting to the speaker 23.

The operation and effects of the present invention configured as described above will be described in detail with reference to FIGS. 2 to 5.

First, the power supply unit 16 drops the input AC voltage and converts the lowered voltage into a DC voltage of a predetermined level to supply operating power to the entire system of the telephone, and the emergency power supply unit 17 outputs the output power of the power supply unit 16. If a power failure occurs after the backup, the operating system supplies power to the entire system.

)에 입력하게 되고 링신호가 없으면 하이신호를 입력하게 된다. 이에 따라 상기한 마이크로 프로세서(11)는 링수신검출부(6)로부터 로우신호가 입력되면 교환국으로부터의 링신호가 입력됨을 판단하여 훅크스위치제어부(5)의 훅크스위치(SW1)의 온/오프 상태를 검색하게 된다. 이때 통화자가 스피커(21)로부터 발생되는 링신호에 의해 송수화기(19)를 들게되면 훅크스위치 제어부(5)의 훅크스위치(SW1)가 오프단자로 절환되어 마이크로 프로세서(11)의 입력포트(A0)에 로우신호를 입력하게 된다. 상기 마이크로 프로세서(11)는 훅크스위치 제어부(5)로부터 로우신호가 입력되면 훅크스위치(SW)가 오프되었을 판단하여 그의 출력포트(A4)를 통해 하이신호를 출력하여 훅크스위치부(5)의 트랜지스터(Q14)(Q13)와 전화라인루프 및 펄스다이얼 제어부(9)의 트랜지스터(Q16)(Q15)를 턴-온시켜 팁단자(TIP), 링단자(RING)와 스피치네트워크부(18)와의 폐회로를 형성하게 된다.In this state, when the ring signal is sent from the switching center, the ring signal is input to the first and second rectifying units 1 and 2 through the trunk line, the ring terminal RING, and the tip terminal TIP. The second rectifier 2 rectifies the input ring signal and inputs it to the tone ringer 3, and the tone ringer 3 operates the oscillator of an audible frequency according to the voltage input from the second rectifier 2 to set the bell. After converting into a ringable ring signal, the level is adjusted through the ring control unit 4 and output to the speaker 21. On the other hand, the ring reception detecting unit 6 detects the ring signal by turning on / off the light emitting element and the light receiving element of the photocoupler 6a according to the ring signal output from the tone ring rejecting unit 3, and then, when the ring signal is detected, generates a low signal. Interrupt terminal of the microprocessor 11 (

) And if there is no ring signal, high signal is input. Accordingly, when the low signal is input from the ring reception detecting unit 6, the microprocessor 11 determines that the ring signal from the switching station is input, and thus the on / off state of the hook switch SW1 of the hook switch control unit 5 is determined. Search. At this time, when the caller picks up the handset 19 by the ring signal generated from the speaker 21, the hook switch SW1 of the hook switch control unit 5 is switched to the off terminal and the input port A0 of the microprocessor 11 is used. The low signal is input to. The microprocessor 11 determines that the hook switch SW is turned off when the low signal is input from the hook switch control unit 5, and outputs a high signal through its output port A4 to output the transistor of the hook switch unit 5. (Q14) (Q13) and the transistors (Q16) (Q15) of the telephone line loop and pulse dial control unit (9) are turned on so that the closed circuit between the tip terminal (TIP), the ring terminal (RING), and the speech network unit 18 Will form.

Accordingly, the voice signal of the switching station rectified from the first rectifying section 1 is input to the speech network section 18 through the hook switch control section 5, the telephone line loop and the pulse dial control section 9, and the speech network section ( 18 outputs the input voice signal through the handset 19 and transmits the input voice signal from the handset 19 to the switching center through a telephone line. As described above, the microprocessor 11 When the low signal is input from the hook switch control unit 5, that is, the caller lifts the handset 19 and drives the internal timer from the moment when the hook switch SW1 is turned off. In this state, the microprocessor 11 detects an abnormal tone and a voice signal from the switching center. That is, the audible tones of the switching station output from the speech network unit 18 and the voice signal of the hook switch SW1 of the hook switch control unit 5 are turned off and amplified by the voice signal first amplifier 20 of the receiver. The amplified abnormal signal sound and the audio signal are input to the tone detector 14 and the voice detector 15. Accordingly, the tone detector 14 detects an abnormal signal sound as shown in FIG. 4d among the signals output from the first amplifier 20 and converts it to a 4-bit binary day value. D0-D3), and the microprocessor 11 detects the presence or absence of an abnormal signal tone from the tone detector 14, and detects the presence or absence of an audio signal input from the voice detector 15 if the abnormal signal tone is not detected. .

If the abnormal signal tone of the switching station is detected from the tone detector 14, a high signal is output to its output port A2 to turn on the transistor Q26 of the loop control section 10 of FIG. When the transistor Q26 of the control unit 10 is turned on, the base voltages of the transistor Q14 of the hook switch control unit 5 and the transistor Q16 of the telephone line loop and pulse dial control unit 9 become the loop control unit 10. Is bypassed to ground through diodes D13, D14 and transistor Q26 of the transistors Q13, Q14, Q15 and Q16 of the hook switch control section 5 and the telephone line loop and pulse dial control section 9; ) Is turned off to cut off the telephone line, and the transistors Q5 and Q6 of the warning sound power supply unit 12 are turned on by the high signal output from the output port A2 of the microprocessor 11.

At this time, the microprocessor 11 generates a warning sound as shown in FIG. 4a through its output port A3 and inputs it to the warning sound emitting unit 13 and the warning sound power supply unit 12, and is released from the microprocessor 11. The warning sound is output to the handset 19 through the capacitor C62, the transistor Q6 of the third-level warning sound power supply unit 12, and the speech network unit 18. In addition, the warning sound input to the warning sound emitting unit 13 is amplified to a random level in the second amplifier 21 through transistors Q7 and Q8, and the amplified warning signal is shaped through the warning tone shaping unit 10. The speaker 23 outputs a warning sound until the hook switch SW1 is distal, that is, turned on. Thus, since the telephone line is blocked even when the hook switch SW1 is turned off, the exchange station determines that the handset is in the normal position, and then, upon receiving a call from the other party, it is possible to receive a call by ringing.

If the abnormal signal tone of the switching station is not detected from the tone detector 14, the microprocessor 11 detects the presence or absence of the input of the voice signal from the voice detector 15. That is, the voice detector 15 detects a voice signal output from the speech network unit 18 as shown in FIG. 4B and converts it to a 1-bit digital signal as shown in FIG. 4C to input port A1 of the microprocessor 11. ). Accordingly, the microprocessor 11 detects the presence or absence of a voice signal from the voice detector 15 and determines that the voice signal is a normal call. If there is no voice signal, the microprocessor 11 checks the non-signal signal for a predetermined time to determine a predetermined time. If the voice signal is not detected until the elapsed time, the hook switch control unit 5, the telephone line loop and pulse dial control unit 9, and the loop control unit 10 are blocked in the same manner as described above to cut off the telephone line so that the hook switch SW1 ) And the alarm sound power supply unit 12 and the alarm sound output unit 13 are controlled and output to the handset and the speaker 23 until the hook switch SW1 is returned to its original position.

On the other hand, when making a call or when the handset is placed incorrectly and the hook switch SW1 is in the off state, the microprocessor 11 enters the keypad 7 and the dialer 8 which are input to the input ports B0-B7. When a key signal is inputted from the keypad 7 by detecting the presence of an input pulse of), the presence or absence of a signal input from the tone detector 14 and the voice detector 15 is detected in the same manner as described above. If there is no key signal of the keypad 7, the non-signal is checked for a predetermined time. If the key signal is not detected until the predetermined time elapses, the hook switch control unit 5, the telephone line loop and the pulse in the same manner as described above. The dial control unit 9 and the loop control unit 10 are controlled to block the telephone line so that incoming calls can be made even when the hook switch SW1 is turned off, and the alarm sound power supply unit 12 and the alarm sound transmitting unit 13 are controlled to hook. Switch (SW1) The alarm sound will be sent to the handset and the speaker 23 until is returned to the original position.

As described in detail above, the present invention detects the presence of a voice signal during a call off state and a reception off hook signal transmitted from an electronic switchboard when the handset is not placed at a predetermined position of the telephone due to user's carelessness. If a signal is not detected within a predetermined time or a reception-off hook signal is detected, the telephone loop is opened at the same time as a warning sound to the user, so that incoming calls can be made even when the hook switch is turned off.

Claims (2)

According to the ring signal detected from the ring reception detector 4 through the telephone line, the hook switch detects the presence / absence of the voice signal, the presence / absence of the voice signal of the hook switch and the exchange station for a predetermined time in the on / off state of the hook switch and the keypad. The microprocessor 11 which controls the whole system operation of the telephone according to the key input of the unit 7 and the hook which drives according to the control signal of the microprocessor 11 and interfaces various signals transmitted from the switching center. The switch control unit 5, the loop control unit 10 for controlling the loop of the telephone line according to the control signal of the microprocessor 11, and the handset in the state in which the handset is incorrectly placed in accordance with the output signal of the loop control unit 10 When the line is cut off and placed in the normal position, the telephone line is connected to the telephone line by outputting the output signal of the hook switch control unit 5 to the speech network unit 18 by connecting the telephone line. And a pulse dial controller 9, a warning sound power supply unit 12 which outputs a warning sound generated from the microprocessor 11 to a handset through a speech network unit 18, and an output voice signal of the speech network unit 18. A first amplifier 20 for amplifying the signal to an arbitrary level, a voice detector 15 for detecting the presence or absence of a voice signal output from the first amplifier 20, and inputting the same to the microprocessor 11; 1 a tone detector 14 which detects an abnormal signal sound of the switching center output from the amplifier 20 and inputs it to the microprocessor 11, and an alarm tone output unit which generates an alarm sound according to a control signal of the microprocessor 11 ( 13), a second amplifying unit 21 for amplifying the warning sound signal of the warning sound output unit 13 to an arbitrary level, and outputting the warning sound of the second amplifying unit 21 to be output to the speaker 23. Handset with Beep Shaper 22 Call alerting device, regardless of location. A first step of searching for a hook switch state and a presence or absence of a ring signal input; a second step of searching for a hook off of a hook switch if the ring signal is input as a result of the search; A third step of searching for the presence of an input; a fourth step of searching for the presence of a voice signal for a predetermined time in a call state if the abnormal signal tone is not detected; and the search result hook switch of the first step is hooked off If it is determined that the call state, the fifth step of searching for the presence or absence of the input of the dial key for a predetermined time, and the abnormal result of the search result of the search results of the third, fourth, fifth step is detected or the input of the voice signal and the dial key for a predetermined time When not in use, the telephone line is opened and placed in the incoming state, and the sixth step of generating a warning sound until the hook switch returns to its original state Call alert method that can be received regardless of the handset location.

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