JPH0324113B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in an automatic notification device connected to a telephone line. To be more specific,
The present invention aims to provide an automatic notification device that can send notification messages from the beginning regardless of the type of telephone line.

(Prior Art) Many automatic notification devices of this type have already been proposed and are known (for example, Japanese Patent Publication No. 59-879).

For example, it is activated in the event of an emergency such as theft or fire, and is configured to send out a preset telephone number to report to, and when the other party answers, send out a prerecorded notification message. . In order for the other party to be notified to be able to listen to the notification message from the beginning, it is necessary to detect the other party's response and send the notification message after the response is received.

Conventionally, this response has been confirmed by detecting that the voltage polarity between the communication lines is reversed.

However, in the case of telephone lines (rural mass telephones, etc.), fire department (119), or police station (110) where polarity cannot be reversed even if there is a response, a report message is sent immediately after sending the dialed number. I have to send it out.

Therefore, the person who responded will be able to listen to the notification message from the middle. Particularly when reporting an emergency situation, even though the message is of the utmost importance, it has to wait until the next message cycle, so there are problems such as it takes time for the message to be understood.

(Problems to be Solved by the Invention) As described above, the present invention enables the transmission of a notification message even if the other party receiving a call from the automatic reporting device is on a telephone line where polarity reversal cannot be obtained as described above. The purpose is to control the transmission so that the message can be listened to from the beginning.

(Means for Solving the Problems) For this purpose, in the present invention, an automatic notification device is configured to send out a preset telephone number and a recorded notification message when an activation signal is given. a level detection means for detecting a signal level between the communication lines after the preset telephone number is transmitted; and a voice detection means for detecting the presence or absence of a signal in the voice band;
A 400Hz detection means for detecting a 400Hz signal is provided,
Sending of the above notification message is started based on the detection result of each detection means.

(Example) Next, an example of the present invention will be described in detail with reference to figures. FIG. 1 is a block diagram of an automatic notification device according to the present invention, in which 1 is a telephone line, and 2 is a network control circuit for capturing the line and sending out dial signals, which is the same as the conventional one. Reference numeral 3 denotes a message sending circuit in which a notification message is recorded in advance on a magnetic tape or a voice synthesis circuit. 4 is a control circuit for controlling the network control circuit 2 and the message sending circuit 3; Reference numeral 5 denotes a sensor or a push button switch, which is a means for giving an activation signal to the automatic notification device. Reference numeral 6 denotes a level detecting means, which is composed of a circuit for detecting the level of a signal such as a voice appearing on the telephone line 1, and is configured to send out a fixed time period output signal when a signal of a predetermined level or higher is detected. Reference numeral 7 denotes a voice detection means, which includes a bandpass filter and an amplifier for the voice band, and is configured to send out an output in response to the arrival of a voice signal. 8 is a 400Hz detection means, which includes a 400Hz bandpass filter and an amplifier, and is configured to output only a 400Hz signal. Reference numeral 9 denotes a determination circuit, which is configured to send a control signal to the control circuit 4 based on the states of the output signals of the level detection means 6, audio detection means 7 and 400Hz detection means 8, and includes a gate circuit, an arithmetic circuit, etc. It is composed of. FIG. 2 shows the conditions etc. for the judgment circuit 9 to judge the "response" of the destination party.

Next, the operation will be explained.

When the sensor or pushbutton switch 5 is activated due to the occurrence of an emergency situation, the signal is sent to the control circuit 4.
added to. The control circuit 4 thereby drives the network control circuit 2. The network control circuit 2 captures the telephone line 1 and sends out a dial signal for a preset destination telephone number. When the sending is finished, track 1
0 is connected to the telephone line 1, and the signal arriving at the telephone line 1 is inputted to the level detecting means 6 and the like.

Therefore, upon the arrival of the ring back tone (400Hz) sent out while the called party is "calling" after sending out the dial signal, an output signal is output to each of the level detection means 6, voice detection means 7, and 400Hz detection means 8. I get a signal. That is, the level detection means 6
The voice detection means 7 and the 400Hz detection means 8 each output signals with a frequency of 400Hz to the control circuit 4, in synchronization with the intermittent cycle of the ringback tone, that is, 1 second ON and 2 seconds OFF. do.
When the person to whom the report is sent responds, the ringback tone signal stops and the response becomes voice or silence. As a result, the output of the level detecting means 6 no longer has the above-mentioned periodic output, and the outputs of the audio detecting means 7 and the 400 Hz detecting means 8 are no longer synchronized. In other words, when the other party responds, "Hi, this is..." or "Moshimoshi."
, etc., or the caller is waiting for the caller to start speaking, so in the former case, outputs are obtained from the level detection means 6 and the voice detection means 7 depending on the other party's voice. However, since the audio does not always contain a 400 Hz component, the output of the 400 Hz detection means 8 cannot be obtained in synchronization with the output of the level detection means 6. (See the fourth row of the "Mode" section in FIG. 2) In the latter case, since there is no sound, synchronized signal outputs cannot be obtained from the respective detection means 6, 7, and 8 described above. (“Mode” in Figure 2
) Therefore, as mentioned above, the level detection means 8,
When the output states of the voice detection means 7 and the 400Hz detection means 8 are applied to the determination circuit 9, the determination circuit 9 determines that the other party has responded, and sends an output signal to the control circuit 4. As a result, the control circuit 4 controls the network control circuit 2 to disconnect the line 10 from the telephone line 1 and also drives the message sending means 3.

In other words, the transmission of the prerecorded notification message is started.

In addition, as described above, when the dial signal of the preset reporting destination telephone number is sent and the track 10 is connected to the telephone line 1, if the other party to report is "busy", the telephone number is A busy tone arrives on the line 1, and the signal is input to the level detection means 6 and the like as described above. In this case, the second
As shown in the figure, the output states of the level detecting means 6, voice detecting means 7, and 400Hz detecting means 8 are the same as "calling" in response to the determination conditions, and do not result in a "answering" determination.

(Effects of the Invention) As explained above, according to the present invention, even if the polarity of the telephone line cannot be reversed even when an incoming call is answered, the start of sending a notification message can be controlled, so it is especially useful for emergencies. The effect will be even more pronounced if it is applied to a reporting device that uses the system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an automatic notification device according to the present invention. FIG. 2 shows the conditions etc. for the determination circuit to determine "response". 2... Network control circuit, 3... Message sending circuit, 4... Control circuit, 6... Level detection means, 7
...Audio detection means, 8...400Hz detection means, 9...
...Judgment circuit.

Claims (1)

[Claims] 1. In an automatic notification device that, when an activation signal is given, sends out a preset telephone number and also sends out a recorded notification message, the communication between telephone lines after sending out the preset telephone number level detection means for detecting the signal level of , audio detection means for detecting the presence or absence of a signal in the audio band, and 400Hz detection means for detecting a 400Hz signal, and periodic and synchronized output from each detection means. An automatic notification device characterized in that the transmission of the notification message is started when the notification message is no longer obtained.