JP4504241B2 - Automatic response detection method and automatic response detection device - Google Patents

Description

  The present invention relates to counterpart response detection used in an automatic transmission system.

  The other party's response detection used in the conventional automatic transmission system detects a voltage polarity reversal due to the other party's response, so a telephone line that cannot obtain a voltage polarity reversal even if the other party responds (police station, fire department) In the case of, the other party's response could not be confirmed. In order to solve such a problem, a device for detecting the other party's ringing signal after sending the dial number, and detecting the other party's ringing signal after detecting the other party's calling signal, is determined to be the other party's response (For example, refer to Patent Document 1).

However, even with this ingenuity, if the telephone line on the automatic call system side is disconnected due to fire, crime, accident, etc. after detecting the other party's ringing signal, it will be regarded as the other party's response and the other party will be surely There is a problem that the response cannot be detected and the other party's response cannot be determined.
Japanese Patent Publication No. 3-24113

  In view of the above problems, in the other party automatic response detection method and the other party automatic response detection apparatus, after detecting the other party calling signal, the telephone line on the automatic transmission system side is disconnected due to a fire, crime, accident, or the like. In this case, it is not regarded as a partner response, and an object is to prevent erroneous partner response detection.

  In order to solve the above-mentioned problem, the present invention provides a partner call signal detection process for detecting a call signal from a call destination in a call answering automatic detection method of an automatic call system that automatically calls a predetermined telephone destination. And a line connection state detection process for detecting connection or disconnection of the line connected to the automatic transmission system, and after automatic transmission, the other party calling signal is detected by the other party calling signal detection process. After detecting the ringing signal, the stop of the other party's ringing signal is detected, and if the line disconnection is not detected by the line connection state detection process, it is determined that the other party has responded to the automatic call.

  Further, the present invention provides a partner answering automatic detection device of an automatic call system that automatically sends a call to a predetermined telephone destination, a partner call signal detecting means for detecting a call signal from the callee, and the automatic call system. Line connection state detection means for detecting connection or disconnection of the line connected to the line, and after automatic transmission, the other party calling signal detection means detects the other party calling signal, and after the other party calling signal is detected And detecting a stop of the other party's calling signal and outputting a partner response signal indicating that the other party has responded to the automatic call when the line connection state detecting means does not detect the disconnection of the line. did.

  According to the present invention, in an automatic transmission system that automatically makes a call to a predetermined telephone destination, even if the line is disconnected due to a fire, crime, accident, or the like after the other party's ringing signal is detected, the other party's response is reliably detected. There is an advantage that a series of sequence of automatic transmission → partner response → communication (report) → completion → end talk can be completed with certainty.

  Hereinafter, the configuration of the present invention will be described using a communication terminal device, which is an emergency call device, as an example with reference to the drawings. 1-3 is a figure which shows the structure of the emergency call apparatus concerning the 1st Example of this invention, Comprising: This description is not limited to this emergency call apparatus, For example, communication terminals, such as an automatic notification apparatus It may be a device.

  FIG. 1 is a diagram for explaining the outline of the configuration of a communication terminal device which is an emergency communication device according to the present invention. FIG. 2 is a diagram for explaining the outline of the configuration of the telephone line disconnection detection unit. FIG. 3 is a flowchart of partner response detection in the partner response detection unit.

  As shown in FIG. 1, a communication terminal device 1 according to the present invention includes a network control unit 11, a message sending unit 12, a partner calling signal detection unit 13, a telephone line disconnection detection unit 14, and a control unit 15. It is comprised.

  The network control unit 11 is connected to the telephone line 2 and is an interface circuit for performing dial transmission to the telephone line 2, message transmission, and reception of a partner calling signal.

  The message sending unit 12 is a circuit that sends a pre-registered message to the telephone line 2 through the network control unit 11 based on the partner response detection output of the control unit 15.

  The other party calling signal detector 13 is a circuit that detects the other party calling signal and detects the stop of the other party calling signal.

  The telephone line disconnection detection unit 14 is a circuit that detects that the telephone line has been disconnected, and outputs a telephone line disconnection monitoring signal.

  An outline of the configuration of the telephone line disconnection detection unit 14 will be described with reference to FIG. The telephone line disconnection detection unit 14 includes a diode bridge 141, a current limiting resistor 142, a capacitor 143, a discharge resistor 144, a comparator 145, a photocoupler 146, a transistor 147 serving as switching means, and a bias resistor 148. It is configured.

  The diode bridge 141 is a means for rectifying the voltage supplied to the telephone line 2, and the voltage supplied to the telephone line 2 is supplied to the capacitor 143 via the current limiting resistor 142 that does not affect the telephone line 2. Charge.

  The comparator 145 monitors the charging voltage of the capacitor 143. When the charging voltage exceeds a certain value, the comparator 145 causes the transistor 147 to conduct, and the power charged in the capacitor 143 is supplied to the light-emitting unit of the photocoupler 146 via the discharge resistor 144. The voltage supplied through the bias resistor 148 is intermittently output to the control unit 15 as a telephone line disconnection monitoring signal insulated from the telephone line 2 by operating the transistor 146B of the light receiving unit. .

  The control unit 15 intermittently receives a function for instructing the network control unit 11 to send the other party dial number, the state of the other party ringing tone detection unit 13, and the telephone line disconnection monitoring signal from the telephone line disconnection detection unit 14. Is output, the other party response signal indicating that the other party has responded to the automatic transmission is output, and the message sending unit 12 is instructed to send a signal (message). When the telephone line disconnection monitoring signal from the telephone line disconnection detection unit 14 is stopped, the control unit 15 determines that the telephone line is disconnected, terminates the line, and repeats from dialing again.

  In such a communication terminal device 1, when a voltage is applied to the telephone line 2, the telephone line disconnection detection unit 14 is charged with the capacitor 143 by the telephone line 2 via the current limiting resistor 142, and has a predetermined voltage. Then, the comparator 145 turns on the transistor 147 and is discharged through the discharge resistor 144 and the light emitting diode 146A of the photocoupler 146. Comparator 145 has a hysteresis between a first voltage that operates by detecting that the input voltage has reached a predetermined voltage, and a second voltage that stops operation when the input voltage decreases after operation. The operation is stopped when a second predetermined voltage lower than the first voltage at which the operation starts is reached. Therefore, when the capacitor 143 starts discharging and a predetermined time elapses and the voltage of the capacitor 143 reaches the second voltage, the transistor 147 is turned off. Therefore, when the telephone line is not disconnected, the telephone line disconnection monitoring signal repeats ON / OFF at a predetermined cycle.

  When the telephone line disconnection monitoring signal from the telephone line disconnection detection unit 14 is repeatedly output, the control unit 15 determines that the telephone line is in a connected state, stops the intermittent output of the telephone line disconnection monitoring signal, and outputs a constant voltage. If it remains (high level), it is determined that the line has been disconnected.

  Processing in the communication terminal 1 for realizing partner response detection will be described with reference to FIG. FIG. 3 is a flowchart of an outline process of partner response detection. First, when a reporting factor occurs, the control unit 15 instructs the network control unit 11 to send the other party dial number and sends the other party dial number to the telephone line 2 (S1).

  After sending the other party dial number, the other party calling signal detection unit 13 starts detecting the other party calling signal (S2). This process of detecting the other party call signal is called the other party call signal detection process. When the other party calling signal is detected (S3: Yes), the other party calling signal detection unit 13 starts detecting the other party calling signal stop (S4). The other party calling signal is a signal (400 Hz) from an exchange connected to the end of the telephone line 2, and this signal may be detected by detecting 400 Hz, and any conventionally known method or means can be applied. Is possible.

  When the stop of the other party calling signal is detected (S4: Yes), the telephone line disconnection is detected by the telephone line disconnection monitoring signal (S5). This process of detecting a telephone line disconnection is called a line connection state detection process. If there is no detection of disconnection of the telephone line (S5: No), the control unit 15 outputs a partner response signal indicating that the other party has responded (processing in the control unit 15), and the control unit 15 sends a message to the message sending unit 12. Sending is instructed to start sending a message (S7). When sending of the message is completed, the notification is completed (S8).

  If it is detected in step 5 that the telephone line has been disconnected (S5: Yes), it is determined that the telephone line has been disconnected, the process proceeds to report failure (S6), and the process returns to dial transmission (S1) again.

  In this way, in the communication terminal device equipped with the other party response automatic detection function, even after detecting the other party calling signal, even if the other party calling signal stop is detected, the automatic transmission system for fire, crime, accident, etc. When the telephone line on the side is disconnected, it is possible to reliably detect disconnection of the telephone line, and it is possible to reliably detect partner response detection by preventing erroneous partner response detection.

  In the above description, the comparator 145 constituting the telephone line disconnection detection unit 14 monitors the charging voltage of the capacitor 143, and any other means, for example, a reset, as long as it has a hysteresis between the operation start voltage and the operation stop voltage. It may be an IC, a thyristor, a voltage monitoring means, or the like. The photocoupler 146 may be any means, for example, a relay, a photo MOS relay, a phototransistor, etc., as long as it is configured to insulate between the telephone line 2 and the telephone line disconnection monitoring signal.

The figure explaining the outline of a structure of the communication terminal device concerning this invention. The figure explaining the outline of a structure of a telephone line disconnection detection part. The flowchart of an other party response detection process.

Explanation of symbols

1: Communication terminal device 11: Network control unit 12: Message sending unit 13: Counter-calling signal detection unit 14: Telephone line disconnection detection unit 141: Diode bridge 142: Current limiting resistor 143: Capacitor 144: Discharge resistor 145: Comparator 146 : Photocoupler 147: Transistor 148: Bias resistor 15: Control unit 2: Telephone line

Claims (2)

In the other party automatic response detection method of the automatic transmission system that automatically calls a predetermined telephone destination,
A partner calling signal detection process for detecting a partner calling signal from a call destination, and a line connection state detection process for detecting connection or disconnection of a line connected to the automatic call system,
After automatic transmission, the other party calling signal is detected by the other party calling signal detection process, and after the other party calling signal is detected, the stop of the other party calling signal is detected, and the line connection state detection process detects the line. If no disconnection is detected, it is determined that the other party has responded to the automatic call. In the other party automatic response detection device of the automatic transmission system that automatically transmits to a predetermined telephone destination,
A partner call signal detection means for detecting a call signal from the call destination, and a line connection state detection means for detecting connection or disconnection of the line connected to the automatic call system;
After automatic transmission, the other party calling signal detecting means detects the other party calling signal, and after detecting the other party calling signal, the other party calling signal is stopped and the line connection state detecting means detects the line. If no disconnection is detected, a partner response automatic detection device is provided, which outputs a partner response signal indicating that the partner has responded to the partner automatic transmission.

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