JPH0523296U - Telephone device for fire alarm system - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the handset plug is plugged into the telephone jack on the receiver, the ringing sound device of the receiver rings for a predetermined time when there is a telephone call from the terminal. To provide a telephone device for a fire alarm system that can be operated. [Structure] A telephone line provided between the receiver and the terminal, an acoustic device that rings at the receiver side when a telephone call is made from the terminal, and a telephone line at the receiver side is connected to the line for this call. In the telephone device for the fire alarm system, which is provided with a circuit means for making the telephone line between the terminal and the terminal capable of making a call and stopping the sounding of the audio device,
The receiver is provided with control means for detecting a telephone call from the terminal when the telephone line is in a call-enabled state and causing the acoustic device to ring for a certain period of time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a telephone device for a fire alarm system, and more particularly to a telephone device for performing a telephone call between a receiver of a fire alarm system and a terminal such as a transmitter or a sub display panel.

[0002]

[Prior Art]

 A conventional telephone device in a general fire alarm system has a call detection circuit as shown in FIG. 3, for example. In FIG. 3, the fire receiver FR is equipped with, for example, a telephone jack Jr, a call buzzer BZ for calling a telephone, and a telephone lamp L in addition to a fire alarm circuit device (not shown), and a sub-receiver connected by a line to this receiver. The terminal FT such as a transmitter is provided with a telephone jack Jt, and a telephone line is constructed between them.

In FIG. 3, in the receiver FR, when there is a telephone call from the terminal FT, the monitoring staff informs the disaster prevention staff by displaying the lighting of the telephone light L and the sound of the buzzer BZ, and the monitoring staff is In order to stop the ringing of the buzzer BZ when the telephone jack Jr is plugged into the handset to enable the call, a circuit for detecting the contact signals of these jacks Jr, Jt is incorporated.

In FIG. 3, this circuit is composed of a transistor Q, resistors R1 to R4, a capacitor C, etc., and determines whether or not there is conduction between the contacts a and b of the telephone jack Jr of the receiver and the telephone jack Jt on the terminal side. The buzzer BZ and the telephone lamp L are selectively operated by the change in the DC impedance between the terminals t1 and t2 connected via the signal lines W1 and W2. In this example, as the telephone of the receiver FR, the case where the handset is plugged into the jack Jr is shown, but this may be a well-known telephone of the hook type, in which case, for example, the contact of the jack Jr. Each of a to c will be a hook switch.

The circuit shown in FIG. 3 is in a state in which the handset is not connected to any of the jacks Jr and Jt. In this state, the terminals t1 and t2 are open, so the transistor Q is cut off. Therefore, the telephone light L and the buzzer BZ are inactive.

When the handset plug is inserted into the jack Jt in the terminal FT, the DC impedance of the handset circuit on the terminal side appears between the terminals t1 and t2 on the receiver side via the signal lines W1 and W2, and thus the transistor Q is connected. The base of the transistor Q3 is grounded through the resistor R3 and this impedance, and the base current mainly determined by the resistors R2 and R3 flows from the + 24V line between the emitter and the base of the transistor Q to make the transistor Q conductive. As a result, the telephone light L and the buzzer BZ are energized, and the lighting display and acoustic notification of the telephone call are performed.

When a telephone call is confirmed on the receiver side and a monitoring person inserts a handset plug into the jack Jr, the handset circuit is connected between the contacts a and c of the jack Jr and the terminal is connected via the capacitor C. The buzzer BZ stops ringing because the telephone line with the FT becomes available and the contact points a and b of the jack Jr are opened, while the telephone lamp L remains lit. After a telephone call is made between the terminal FT and the receiver FR, the circuits will be restored if the handsets are unplugged from both jacks Jr, Jt.

[0008]

[Problems to be solved by the device]

 As described above, in the conventional fire alarm system telephone device, for example, by inserting the plug of the handset into the telephone jack of the transmitter, the receiver detects the telephone call from the transmitter and the telephone light Is turned on and the buzzer, which is an audio device, is sounded to notify the call, and the receiver side inserts the plug of the handset into the telephone jack for this call to enable communication with the transmitter side and the buzzer. Has been stopped.

By the way, especially when carrying out maintenance and inspections with a plurality of terminals, when a call is repeatedly repeated with each terminal, the transmitter side moves to the next inspection place at the end of the call. Inevitably, the handset will be unplugged, but on the receiver side, the operation of unplugging the handset plug from the jack is cumbersome, and if possible, I would like to make an inspection call with each terminal while inserting it There is a request.

However, in the conventional telephone device, if the plug of the handset is left plugged in the telephone jack Jr of the receiver FR, then a telephone call is made from another transmitter, for example. In this case, although the telephone light L is lit on the receiver side, the buzzer BZ does not ring because the contact points a and b of the jack J r are still open, and therefore the telephone light L is not carefully watched. There is a drawback in that it is difficult to know that a call has been made.Therefore, in order to make sure that the inspection work is carried out reliably, it is necessary to receive calls when repeating calls to and from each terminal, especially during maintenance and inspection of multiple terminals. It is necessary to unplug the handset each time the machine completes a call with each terminal.In addition to the inspection work, if you forget to unplug the handset plug of the receiver. end There was a risk that telephone calls from the end would be overlooked.

In order to solve such a drawback, an object of the present invention is to provide a receiver with a telephone jack when the telephone call is made from the terminal even when the handset is plugged into the telephone jack. It is an object of the present invention to provide a telephone device for a fire alarm system that can sound an acoustic device such as a buzzer for a predetermined time.

[0012]

[Means for Solving the Problems]

 The telephone device for a fire alarm system according to the invention as set forth in claim 1 rings at the receiver side by a telephone line provided between the receiver and a terminal such as a transmitter or a sub display panel and a telephone call from the terminal. Circuit means for making the telephone line between the audio device to be called and the telephone device on the receiver side connected to the line for this call, and for stopping the ringing of the audio device. In a telephone device for a fire alarm system that includes a control unit that detects a telephone call from the terminal when the telephone line is in a callable state and causes the audio device to ring for a predetermined time. The above-mentioned problems are achieved by providing the above-mentioned receiver in the receiver.

The telephone device for a fire alarm system according to a second aspect of the present invention is the telephone device according to the first aspect, wherein the audio device is provided with a voice synthesizer to make a telephone call with a desired acoustic or voice message signal. It was designed so that it could be performed.

[0014]

[Action]

 In the telephone device for the fire alarm system according to the present invention, when there is a telephone call from the terminal to the receiver side through the telephone line provided between the receiver and the terminal, the receiver side telephone is connected to the receiver side. When the telephone is not connected to the telephone line, the sounding means sounds, and in response to this, when the receiver connects the telephone to the line, the telephone line with the terminal becomes available and the sounding device rings. Stop. Up to this point, it is almost the same as the conventional device shown in FIG. 3, but in the telephone device of the present invention, a telephone call from the terminal is made even when the telephone set on the receiver side is in a call enabled state with the line connected. If so, the control means detects this and causes the audio device to ring for a predetermined time. According to the invention as claimed in claim 2, this ringing is performed by a synthetic sound or a voice message by a voice synthesizer, which lasts or repeats, for example, for only a few seconds.

In the present invention, the control means can be composed of, for example, a microcomputer, and the detection circuit for the telephone call from the terminal can be the same as the conventional one.

The present invention does not exclude the provision of a telephone lamp that lights up when there is a telephone call from the terminal in the receiver. In that case, the telephone lamp does not allow telephone calls from the terminal. After that, the receiver's telephone is kept on until it is released from the line, or when the receiver's telephone is still connected to the line and there is a call from the terminal for a certain period of time. It is possible to take various modes such as the one that only blinks.

[0017]

【Example】

 FIG. 1 shows a circuit configuration of a main part of a telephone device for a fire alarm system according to an embodiment of the present invention. In FIG. 1, the same reference numerals as those in FIG. 3 indicate corresponding parts, and the fire receiver FR includes, for example, a telephone jack Jr, a telephone light L and a speaker SP for notifying a telephone call in addition to a fire alarm circuit device (not shown). This speaker SP constitutes an audio device together with a voice synthesis circuit AS and an amplifier AM which are activated and controlled by a microcomputer CPU. A telephone jack Jt is provided in a terminal FT such as a sub-receiver and a transmitter connected to the receiver FR by lines W1 and W2, and such a terminal is connected to a plurality of lines and is connected to the receiver FR. The telephone line is built.

In FIG. 1, in the receiver FR, when the telephone call from the terminal FT is received, the monitoring staff informs the disaster prevention staff by the lighting display of the telephone light L and the sound of the speaker SP. A circuit for detecting the contact signals of the jacks Jr, Jt is incorporated in order to stop the ringing of the speaker SP when the plug of the handset is inserted into the jack Jr and the telephone is ready for communication.

This circuit is composed of a transistor Q, resistors R1 to R8, a capacitor C, etc. in FIG. 1, and informs the microcomputer CPU of whether or not there is conduction between the contacts a and b of the telephone jack Jr of the receiver. Further, the switching of the transistor Q is controlled by changing the DC impedance between the terminals t1 and t2 connected to the terminal side telephone jack Jt via the signal lines W1 and W2, and the conduction / interruption of the transistor Q is controlled by the microcomputer CPU. The control unit of the microcomputer CPU selectively activates the voice synthesizer and turns on the telephone lamp L.

In this embodiment as well, the case where the handset is plug-connected to the jack Jr as the telephone of the receiver FR is shown, but this is also the case of the well-known hook type telephone like the above-mentioned conventional example. Yes, in that case, for example, the contacts a to c of the jack Jr are configured by hook switches.

The circuit shown in FIG. 1 is in a state in which the handset is not connected to any of the jacks Jr and Jt. In this state, the terminals t1 and t2 are open, so the transistor Q is cut off. Therefore, the signal level input to the microcomputer CPU from between the resistors R5 and R6 is the ground potential "L", and the signal input to the microcomputer CPU from the contact b of the jack Jr. The level is also at the ground potential "L" because the contact b is in contact with the contact a, which causes the micro computer CPU to deactivate the telephone lamp L and the voice synthesis circuit AS.

FIG. 2 shows an example of a sequence of control operation by the microcomputer CPU, and the operation will be described below with this figure. Now, when the handset plug is inserted into the jack Jt in the terminal FT, the DC impedance of the handset circuit on the terminal side appears between the terminals t1 and t2 on the receiver side via the signal lines W1 and W2, and therefore the transistor Q The base is grounded via the resistor R3 and this impedance, and the base current mainly determined by the resistors R2 and R3 flows from the + 24V line between the emitter and the base of the transistor Q to make the transistor Q conductive.

The microcomputer CPU determines whether or not there is a telephone call from the terminal by the potential of the connection point between the resistors R5 and R6, and also determines whether or not there is continuity between the contacts a and b of the telephone jack Jr of the receiver. Determine if the handset is plugged into Jr. That is, when the potential at the connection point between the resistors R5 and R6 rises from the low level "L" to the high level "H" due to the conduction of the transistor Q, the microcomputer CPU causes the potential of the contact b of the jack Jr to reach the ground level. Under the condition that it is "L", the control signal of predetermined contents is given to the voice synthesis circuit AS to continuously and repeatedly output the corresponding voice message signal such as "Ping-pong telephone". The speaker SP gives a sound notification of a telephone call through the amplifier AM, and the telephone lamp L is energized and lit through the resistor R8.

In this state, the microcomputer CPU monitors the potential of the contact b of the jack Jr, and if it is still at the low potential “L”, it is calling by the potential of the connection point between the resistors R5 and R6. It is determined whether or not the potential of the connection point of the resistors R5 and R6 is "H", and thus the call is being made since the call is being made, and the potential of the contact b of the jack Jr is repeatedly monitored. If the potential at the connection point is not "L", the call is extinguished. Therefore, the control signal to the voice synthesizing circuit AS is cut off to stop the sound notification, and the telephone lamp L is also turned off.

While the CPU detects the telephone call from the terminal, when the telephone call is confirmed by the monitor on the receiver side and the handset plug is inserted into the jack Jr, the contacts a and c of the jack Jr are inserted. The handset circuit is connected between the terminals and the telephone line with the terminal FT becomes ready for communication via the capacitor C, and the contacts a and b of the jack Jr are opened, so that the microcomputer CPU is connected to the + 5V line. A high potential "H" signal is applied via the resistor R7, whereby the CPU cuts off the control signal to the voice synthesis circuit AS and stops the sound notification from the speaker SP. At this time, the CPU keeps the telephone light L turned on, but the lighting mode may be changed as necessary.

The telephone call state between the terminal FT and the receiver FR determines whether or not the handset plug is inserted into the jack Jt of the terminal FT, based on the impedance change between the terminals t1 and t2. , When the call ends and the handset plug is unplugged from the jack Jt, the transistor Q shuts off, so the CPU can judge that the call has ended, and the receiver side also makes contact if the handset plug is unplugged from the jack Jr. Since the distance between a and b is closed, the CPU can determine that the call enabled state has been cut off.

When all the inputs to the microcomputer CPU are returned to the “L” level by these, the circuit is restored to the original state. In this case, the time when the handset is unplugged on the receiver side does not generally coincide with the time when the handset is unplugged on the terminal side.Therefore, for example, the handset plug on the receiver side is not If it is unplugged before the terminal side, the circuit will be in the state of receiving a telephone call again. To avoid this, when the handset on the receiver side is unplugged, the dead time of a fixed time is set by the function of the CPU. It is preferable to give it to the road and not answer the telephone call from the terminal during that time.

If the handset is unplugged from the telephone jack Jt of the transmitter, and then the handset is plugged into the telephone jack Jr on the side of the handset and one of the telephones is ready to talk again, Considering the case where the handset plug is inserted into the telephone jack Jt at the transmitter, if the handset is unplugged from the telephone jack Jt at the transmitter FT side after the above-mentioned call is finished, the terminal t1 , T2 is opened, the transistor Q is cut off, and the potential given to the microcomputer CPU from the connection point of the resistors R5 and R6 becomes "L", and the telephone lamp L is also turned off.

At this time, since the transmitter / receiver is not unplugged on the receiver side, the high potential “H” is still input to the CPU via the resistor R7. When the next telephone call, that is, the transmitter side handset circuit impedance connection between the terminals t1 and t2 is detected at the receiver side, the transistor Q becomes conductive again and the connection point between the resistors R5 and R6 is at a high potential. Therefore, at this time, the CPU turns on the telephone lamp L again and gives a control signal to the voice synthesis circuit AS for a certain period of time to give the same voice message "Ping-pong phone call" multiple times, for example, only three times. Output from the speaker SP.

In the above embodiment, the sound notification from the speaker SP is not limited to the voice message and may be performed by synthesizing a pseudo sound signal such as a buzzer sound. In some cases, the voice synthesizing circuit is not used. Alternatively, the CPU may cause the buzzer to ring for a certain period of time, for example, “beep beep”. It can be understood that this is a telephone call without any notification including information contents as in the case of normal monitoring because the inspector is usually on standby at the receiver side during maintenance and inspection. Therefore, in some cases, the volume of the sound notification at the time of this recall may be set lower than that at the time of monitoring. Needless to say, if the telephone is of the hook type instead of the jack type, similar control may be performed when an off hook is detected.

[0031]

[Effect of the device]

 As described above, according to the present invention, when the call with the terminal is repeated many times, the receiver side unplugs the handset from the jack and repeats the on-hook / off-hook. Even if the handset is left plugged into the telephone jack of the receiver or off-hook, the telephone call from the terminal can be surely confirmed not only by the indicator light but also by sound notification. It is possible to obtain the effect.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of a main part of a telephone device for a fire alarm system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a control sequence by a microcomputer in the embodiment of the previous figure.

FIG. 3 is a circuit diagram showing a configuration of a main part of a conventional telephone device for a fire alarm system.

[Explanation of symbols]

 FR: Receiver FT: Transmitter (terminal) Jr: Receiver telephone jack Jt: Transmitter telephone jack CPU: Microcomputer AS: Voice synthesis circuit AM: Amplifier SP: Speaker L: Telephone light Q: Transistor

Claims (2)

[Scope of utility model registration request] 1. A telephone line provided between a receiver and a terminal such as a transmitter or a sub-display panel, an acoustic device which rings at the receiver side when a telephone call is made from the terminal, and a reception for this call. In a telephone device for a fire alarm system, which comprises a circuit means for connecting a telephone line on the machine side to a line to enable a telephone line with the terminal and to stop ringing of the audio device, A fire alarm characterized in that the receiver is provided with a control means for detecting a telephone call from the terminal when the telephone line is in a callable state and ringing the acoustic device for a predetermined time. System telephone equipment. 2. The telephone device for a fire alarm system according to claim 1, wherein the audio device includes a voice synthesizer.