JPS6146660A - Guard terminal device - Google Patents

Abstract

PURPOSE:To inform quickly an emergency to a central device by informing the emergency to an opposite party so as to open forcibly a telephone line if the emergency takes place while a telephone set is in use. CONSTITUTION:If the emergency takes place while the telephone set is in use, the busy state of the telephone set is detected by a loop detecting circuit 4. When an emergency pushbutton 15 is depressed in this state, an emergency detection circuit 10 detects it to output an emergency detectng signal to a control section 11. The control section 11 opens a switch 12, closes a switch 14 at the same time and allows a voice signal transmission circuit 6 to inform the occurrence of the emergency to the talking opposite party, and then opens the switch 14 to open the line. Then the control section 11 throws a selector switch 13 to the position of an automatic dial circuit 7, from which the occurrence of the emergency is informed to the central device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a security terminal device connected to a telephone line. In particular, the present invention relates to a security terminal device that can report information to a central device when an emergency signal is generated while a telephone line is in use.

[Conventional technology]

With security terminal devices connected to conventional telephone lines, if an emergency occurs while the telephone line is in use (while the telephone is in use or receiving a ringing signal), the system waits until the line returns to an empty state and then Information on this emergency situation is reported to the central monitoring light device.

[Problem that the invention seeks to solve]

Such conventional maintenance terminal devices have drawbacks such as the time it takes from the occurrence of an emergency situation to the notification, and the failure to make a notification.

The object of the present invention is to provide a security terminal device that can report this information to a central security monitoring light device as soon as possible when an emergency situation occurs.

Means for Solving Problem C] The security terminal device of the present invention includes a line terminal connected to a telephone line, a telephone terminal connected to a telephone, and a terminal for detecting the occurrence of an emergency situation by external input. and a means for automatically notifying the central device of the output information of the first means through a telephone line connected to the line terminal, the security terminal device being connected to the line terminal. a second means for detecting that the telephone line is in use; and a second means for detecting that the telephone line is in use; The telephone line is characterized by comprising a third means for transmitting an audio signal indicating that a situation has occurred, and a fourth means for forcibly opening the telephone line after transmitting the output audio signal of the third means. .

[Effect]

When an emergency situation occurs while the telephone is in use, the security terminal device of the present invention notifies the other party of the occurrence of an emergency situation, forcibly opens the telephone line, and then transmits information on the occurrence of the emergency situation. Automatically notify the central device.

〔Example〕

The figure is a block diagram of a security terminal device according to an embodiment of the present invention.

Line terminal 1 is connected to a line. Telephone terminal 2 is connected to a telephone. Emergency signal input terminal 3 is emergency push button 1
Connected to 5.

Line terminal 1 is connected to selection switch 13 via switch 12 . The line terminal 1 is also connected to an audio signal sending circuit 6 via a switch 14 and a transformer 5. The selection switch 13 connects the automatic dialing circuit 7 and the telephone terminal 2.
and connect one of these to the line. When the selection switch 13 selectively connects the telephone terminal 2, the line terminal 1 is connected to the telephone terminal 2 via the loop detection circuit 4, and in parallel to this, the line terminal 1 is connected to the ringing signal detection circuit 9 via the capacitor 8. Connected.

The emergency signal input terminal 3 is connected to an emergency situation detection circuit 10.

Loop detection circuit 4, voice signal output path 6, automatic dialing circuit 7, calling signal detection circuit 9, and emergency situation detection circuit 1
0 is connected to the control unit 11. The switch 12, the selection switch 13, and the switch 14 are controlled by the control unit 11. In normal use of the telephone, the switch 12 is closed, the selection switch 13 connects the line terminal 1 and the telephone terminal 2, and the switch 14 is open.

The operation in the case where an emergency situation occurs while receiving a call signal in this embodiment will be explained.

While receiving a calling signal, the calling signal is inputted to the calling signal detection circuit 9 through the capacitor 8 . The calling signal detection circuit 9 outputs a calling signal detection signal to the control section 11. Thereby, the control unit 11 recognizes that it is receiving a call.

When the emergency push button 15 is pressed in this state, the emergency detection circuit 10 detects this and outputs an emergency detection signal to the control section 11. The control unit 11 opens the switch 12,
Close the switch 14. Thereby, the transformer 5 is connected to the line terminal 1 and further connected to the line. transformer 5
A response to the call is made by connecting the caller and the line. After this, the control section 11 controls the audio signal sending circuit 6.
Sends a start signal to The audio signal sending circuit 6 sends a notification sound of the occurrence of an emergency situation to the line.

After sending out the notification sound, the control unit 11 opens the switch 14.

The line is opened by opening the switch 12 and the switch 14. After the guaranteed recovery time of the exchange has elapsed, the control section 11 switches the selection switch 14 to the automatic dialing circuit 7 side, closes the switch 12, and starts the automatic dialing circuit 7. The automatic dialing circuit 7 notifies the central device that performs security monitoring of the occurrence of an emergency situation.

Next, the operation when an emergency situation occurs while the telephone is in use will be explained.

The loop detection circuit 2 detects that the telephone is in use. If the emergency button is pressed in this state,
The emergency detection circuit 10 detects this and outputs an emergency detection signal to the control section 11. The control unit 11 includes a switch 12
At the same time, the switch 14 is closed, and the voice signal sending circuit 6 transmits information of the occurrence of an emergency situation to the other party.

After this, the switch 14 is opened to open the line. From this point on, the operation is the same as that during reception of the calling signal.

〔Effect of the invention〕

As described above, according to the present invention, information on the occurrence of an emergency situation can be promptly reported to the central device without waiting for the line to be opened.

Therefore, it is highly effective in arresting criminals, saving lives, preserving property, etc.

[Brief explanation of the drawing]

The figure is a block diagram of a security terminal device according to an embodiment of the present invention. ■...Line terminal, 2...Telephone terminal, 3...Emergency signal input terminal, 4...Loop detection circuit, 5...Transformer, 6...Audio signal sending circuit, 7... Automatic dial circuit, 8... Capacitor, 9... Calling signal detection circuit, 1o... Emergency detection circuit, 11... Control unit,
12... Switch, 13... Selection switch, 14...
・Switch switch.

Claims (1)

[Claims] (1) A line terminal connected to a telephone line, a telephone terminal connected to a telephone, a first means for detecting the occurrence of an emergency situation by external input, and a telephone line connected to the above line terminal. , means for automatically notifying the central device of the output information of the first means, and a second means for detecting that the telephone line connected to the line terminal is in use. means, and a third means for transmitting an audio signal indicating that an emergency situation has occurred on the telephone line in use when the detection output of the first means is sent out when there is a detection output of the second means. and fourth means for forcibly opening the telephone line after the output audio signal of the third means is sent.