JP7329333B2 - Fire alarm equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fire alarm system that uses a telephone line and a transmission line to which a fire sensor is connected from a receiver to connect a telephone base unit and a telephone cordless handset.

Conventionally, in a fire alarm system known as R-type, a terminal device such as a fire sensor equipped with a transmission function is connected to a transmission line drawn from a receiver, and when a fire is detected, for example, a fire sensor Based on the fire interrupt from, a search command is issued to specify the address of the fire sensor that triggered the alarm, the fire occurrence address is displayed, and fire data is collected and monitored from the specified fire sensor. there is

In this way, knowing the address of the fire detector that detected the fire enables appropriate evacuation guidance and fire extinguishing activities, and is an indispensable function for fire monitoring of large-scale facilities in particular.

In addition, in the fire alarm system, the receiver is provided with a telephone main unit as an emergency call device, and the telephone jack provided on the transmitter etc. is connected to the telephone line drawn out from the receiver to the restricted area, In the event of a fire or inspection, when the person in charge connects the maintenance telephone cordless handset carried by the person in charge to the telephone jack of the transmitter, etc., the call is made at the receiver, and the maintenance call is made by off-hooking the telephone base unit. A call connection can be established with the handset.

In some cases, emergency telephone equipment is provided as equipment related to the fire alarm equipment. The emergency telephone equipment has an emergency telephone board with a telephone main unit installed in the same place as the receiver, and a telephone line and a control line are drawn out from the emergency telephone board to the restricted area and the emergency telephone cordless handset is connected.

The maintenance telephone equipment of the fire alarm system cannot be called from the main telephone by specifying the maintenance telephone cordless handset. It can be used not only in emergencies such as fires, but also for daily maintenance and management of facilities.

Japanese Patent Application Laid-Open No. 2004-064709 JP 2017-004451 A JP 2016-076064 A JP 2017-068523 A

However, conventional emergency telephone equipment that can be called by designating such telephone cordless handset must be provided as equipment related to fire alarm equipment, so there is a problem that the equipment cost increases. Maintenance telephone equipment for fire alarm equipment, in which a maintenance telephone cordless handset is connected to a jack and calls are connected to a telephone base unit, costs less, but does not allow advanced call control such as calling a designated telephone cordless handset. , there is a problem that convenience is low compared to emergency telephone equipment.

The present invention utilizes the transmission function used in the R-type fire alarm equipment to enable advanced call control, including calls that specify a telephone cordless handset, as well as calls by connecting a telephone cordless handset to a telephone jack. It is an object of the present invention to provide a fire alarm system with a highly convenient calling function.

(Fire alarm equipment)
The present invention
a transmission line to which a terminal device including a fire detector with a unique address is connected, which is led out from the receiver to the security area;
a telephone line drawn from the receiver together with a transmission line into the restricted area and connecting a telephone main unit provided in the receiver and a telephone cordless handset installed in the restricted area;
In a fire alarm system equipped with
a telephone master unit control unit provided in the receiver for controlling call connection of the telephone master unit;
a telephone repeater connected to a transmission line and a telephone line, having a unique address set therein, and controlling a call connection of a telephone cordless handset;
is provided, the telephone base unit control unit and the telephone repeater transmit and receive a predetermined call control signal through the transmission line to control the call connection of the telephone base unit and the telephone cordless handset to the telephone line;
a telephone jack connected to a telephone line; and
a maintenance telephone cordless handset detachably connected to a telephone jack;
is provided,
The telephone base unit control unit is characterized in that when the maintenance telephone cordless handset is connected to the telephone jack, the telephone master unit is connected to the telephone line to connect the maintenance telephone cordless handset to the maintenance telephone cordless handset.

(Speech detection circuit)
The receiver is equipped with a call detection circuit that detects changes in the line voltage when a maintenance phone handset is connected to the phone jack and outputs a call detection signal. When the detection signal is input, the telephone main unit is connected to the telephone line and the maintenance telephone cordless handset is connected for communication.

(Call maintenance telephone handset)
When a call detection signal is input from the call detection circuit, the telephone base unit control unit performs a call call and displays a call to the maintenance telephone cordless handset on the screen. to a telephone line.

(Maintenance handset priority and handset hold tone)
When the telephone base unit control unit detects connection to the telephone jack of the maintenance telephone cordless handset during the call connection between the telephone base unit and the first telephone cordless handset, it notifies the call of the maintenance telephone cordless handset, Along with switching to the call connection of the handset, a holding command signal designating the address of the telephone relay part of one telephone handset is transmitted to disconnect the one telephone handset from the telephone line and output a predetermined on-hold tone.

(Fire alarm system with emergency telephone system and maintenance telephone system)
In another aspect of the present invention, a transmission line connected to a terminal device including a fire sensor with a specific address, which is led out from the receiver to the security area;
An emergency telephone line that is pulled out from the receiver to the restricted area and connects the telephone main unit provided in the receiver and the emergency telephone cordless handset installed in the restricted area;
a maintenance telephone line that is drawn out from the receiver to the restricted area and that connects a telephone main unit provided in the receiver and a maintenance telephone cordless handset installed in the restricted area;
In a fire alarm system equipped with
a telephone master unit control unit provided in the receiver for controlling call connection of the telephone master unit;
a telephone repeater connected to a transmission line and an emergency telephone line, having a unique address set therein, and controlling call connection of an emergency telephone handset;
is provided, the telephone base unit control unit and the telephone repeater transmit and receive a predetermined call control signal through the transmission line to control the call connection between the telephone base unit and the emergency telephone cordless handset for the emergency telephone line;
a telephone jack connected to a maintenance telephone line;
a maintenance telephone cordless handset detachably connected to a telephone jack;
is provided,
The telephone base unit control unit is characterized in that when the maintenance telephone cordless handset is connected to the telephone jack, the telephone master unit is connected to the maintenance telephone cord and connected to the maintenance telephone cordless handset.

(Call control for emergency telephone cordless handsets and maintenance telephone cordless handsets)
The telephone base unit control unit controls calls originating from each of the emergency telephone cordless handset and the maintenance telephone cordless handset, and at least one of the calls from both the emergency telephone cordless handset and the maintenance telephone cordless handset is duplicated. Choose to control your calls.

(basic effect)
The present invention includes a transmission line to which a terminal device including a fire sensor with a unique address is connected, which is led out from the receiver to the security area, and a transmission line which is led out from the receiver to the security area together with the transmission line, and is connected to the receiver. In a fire alarm system equipped with a telephone master unit and a telephone cord connecting a telephone cordless handset installed in a restricted area, a telephone master unit provided in the receiver to control the call connection of the telephone master unit. and a telephone repeater connected to the transmission line and the telephone line, having a unique address set therein, and controlling the call connection of the telephone cordless handset. It controls the call connection between the telephone master unit and the telephone cordless handset to the telephone line by transmitting and receiving a predetermined call control signal through the transmission line, and is detachably connected to the telephone jack connected to the telephone line and the telephone jack. The telephone base unit control unit connects the telephone base unit to the telephone line and connects the maintenance telephone cordless handset to the maintenance telephone cordless handset when the maintenance telephone cordless handset is connected to the telephone jack. Therefore, by using the transmission function of the transmission line used in the R-type fire alarm equipment for call control, it is possible to easily and at low cost achieve advanced call control, including calls to specified telephone cordless handsets. can.

Also, in addition to advanced call control including calls to designated telephone cordless handsets using transmission lines, a maintenance telephone device that connects a portable maintenance telephone cordless handset to a telephone jack to make calls without impairing its functionality. can be compatible, and furthermore, high convenience is obtained.

(Effect of call detection circuit)
In addition, the receiver is equipped with a call detection circuit that detects changes in the line voltage when a maintenance telephone cordless handset is connected to the phone jack and outputs a call detection signal. When a call detection signal is input from the main unit, the telephone base unit is connected to the telephone line and a call is connected to the maintenance telephone cordless handset. A call connection can be established with the telephone master station.

(Effect on calls from maintenance telephone handset)
In addition, when a call detection signal is input from the call detection circuit, the telephone master unit control unit performs a call call and displays a call to the maintenance telephone cordless handset on the screen. Since the base unit is connected to the telephone line, when the maintenance telephone cordless handset is connected to the phone jack, the call ringing tone is output from the receiver and the call from the maintenance telephone cordless handset carried by the person in charge is displayed on the screen. Knowing that it is, you can respond appropriately.

(Priority of the maintenance telephone cordless handset and the effect of the hold tone of the telephone cordless handset)
Further, when the telephone base unit control unit detects connection to the telephone jack of the maintenance telephone cordless handset during the call connection between the telephone base unit and the first telephone cordless handset, the maintenance telephone cordless handset notifies the call of the maintenance telephone cordless handset, At the same time as switching to the call connection of the maintenance telephone cordless handset, a holding command signal specifying the address of the telephone relay section of the telephone cordless handset 1 is transmitted to disconnect the telephone 1 from the telephone line and output a predetermined on-hold tone. Therefore, when the maintenance telephone cordless handset is connected to the telephone jack during a call between the telephone base unit and the telephone cordless handset, the call connection between the telephone base unit and the telephone cordless handset is put on hold and the maintenance telephone cordless handset is connected. Calls can be prioritized.

(Fire alarm system with emergency telephone system and maintenance telephone system)
According to another aspect of the present invention, a transmission line connected to a terminal device including a fire sensor set with a unique address, which is led out from the receiver to the security zone, and a transmission line led out from the receiver to the security zone. , An emergency telephone line that connects the telephone main unit installed in the receiver and the emergency telephone cordless handset installed in the restricted area, and an emergency telephone line that is pulled out from the receiver to the restricted area and connected to the telephone master unit installed in the receiver In a fire alarm system provided with a maintenance telephone line that connects an installed maintenance telephone cordless handset, a telephone master unit control unit that is provided in a receiver and controls call connection of the telephone master unit; a telephone repeater that is connected to the line and the emergency telephone line, has a unique address set therein, and controls call connection of the emergency telephone cordless handset; It transmits and receives a predetermined call control signal to control the call connection between the telephone main unit and the emergency telephone cordless handset for the emergency telephone line, and is detachably connected to the telephone jack connected to the maintenance telephone line and the telephone jack. A maintenance telephone cordless handset is provided, and the telephone base unit control unit connects the telephone base unit to the maintenance telephone line to connect the maintenance telephone cordless handset to the maintenance telephone cordless handset when the maintenance telephone cordless handset is connected to the telephone jack. Therefore, for emergency telephone equipment using emergency telephone lines, advanced call control that displays the caller can be realized easily and at low cost, and for maintenance telephone equipment using maintenance telephone lines, A telephone call can be made by connecting a portable maintenance telephone cordless handset to the telephone jack, so that both emergency telephone equipment and maintenance telephone equipment can be used, and high convenience can be obtained.

In addition, by integrating the functions of the emergency telephone master unit into the receiver, the installation space for the fire alarm system and emergency telephone system has been reduced, and calls to the emergency telephone cordless handset or maintenance telephone cordless handset can be made in the same way. It can be performed in common by using the telephone base unit, and the call operation can be performed simply and easily without changing the place.

(Effect of call control of emergency telephone cordless handsets and maintenance telephone cordless handsets)
In addition, the telephone base unit control unit controls calls made by each outgoing call from the emergency telephone cordless handset and the maintenance telephone cordless handset, and when calls from both the emergency telephone cordless handset and the maintenance telephone cordless handset overlap, at least one of them Since the call is controlled by selecting one of them, even if the maintenance telephone cordless handset and the emergency telephone cordless handset receive the same call, it is possible to freely select the caller as necessary.

Explanatory diagram showing an embodiment of a fire alarm system with a call control function 2 is a block diagram illustrating an embodiment of the telephone repeater of FIG. 1; FIG. FIG. 2 is a block diagram showing an embodiment of a telephone base unit circuit unit and a call detection circuit unit provided in the receiver of FIG. 1; Time chart showing call control for specifying and calling a telephone cordless handset by a telephone base unit Time chart showing call control with the telephone base unit by off-hooking the telephone cordless handset Time chart showing call control when a telephone handset goes off-hook while the telephone master is talking to another telephone handset A time chart showing call control when a call is received from another telephone cordless handset during a call between a telephone base unit and a telephone cordless handset and the call is switched. A time chart showing call control of a three-way call by a telephone base unit and two telephone cordless handsets. Time chart showing call control performed by connecting a maintenance telephone cordless handset to a telephone jack An explanatory diagram showing an embodiment of a fire alarm system equipped with a call control function for an emergency telephone system linked to an emergency broadcasting system and a maintenance telephone system used for maintenance and inspection.

[Fire alarm system]
(Outline of fire alarm system with call control function)
FIG. 1 is an explanatory diagram showing an outline of a fire alarm system having a call control function. As shown in FIG. 1, for example, an R-type receiver 10 is installed in a building where fire alarm equipment is installed, such as a janitor's office. Telephone lines 16a and 16b are drawn out.

A plurality of fire detectors 14 and repeaters 15 having a transmission function and having unique addresses are connected to the transmission lines 12a and 12b. A plurality of telephone repeaters 18 each provided with a telephone cordless handset 20 are connected to the transmission lines 12a, 12b and the telephone lines 16a, 16b. It has a call control function. In addition, the receiver 10 is provided with a telephone main unit 28 corresponding to the telephone cordless handset 20 . The telephone lines 16a and 16b ensure the transmission quality of voice signals in the audio frequency band 300-3400H of the audible band.

Here, the maximum number of addresses set in the fire detectors 14, repeaters 15 and telephone repeaters 18 connected to the transmission lines 12a and 12b is, for example, 255. Terminal equipment including sensors 14, repeaters 15 and telephone repeaters 18 can be connected.

A transmitter 36 is connected to the repeater 15 . The transmitter 36 is provided with a transmitter button 36a. When the transmitter button 36a is turned on by pushing the transmitter button 36a in case of fire, a transmission signal is output to the repeater 15, and the receiver 10 is sent from the repeater 15 via the transmission lines 12a and 12b. A fire alarm signal is sent to and a fire alarm is output.

A telephone jack 38 is provided in the transmitter 36, and the telephone jack 38 is connected to the telephone lines 16a and 16b. When the plug 42 of the maintenance telephone cordless handset 40 carried by the person in charge is inserted into the telephone jack 38, the maintenance telephone cordless handset 40 is connected to the telephone lines 16a and 16b, and the telephone base unit 28 provided in the receiver 10 is connected. A call connection is established and a call can be made.

(Functional configuration of receiver)
The receiver 10 includes a reception control unit 22, a transmission unit 24, a telephone master unit circuit unit 26, a telephone master unit 28, a display 30 with a touch panel, a display unit 31, an operation unit 32, an alarm unit 33 equipped with a speaker, and an alarm unit 33. A section 34 and a call detection circuit section 35 are provided.

The reception control unit 22 is assumed to be a computer circuit or the like having a CPU, a memory, various input/output ports, and the like. The transmission unit 24 transmits and receives signals according to a predetermined communication protocol to/from the fire detector 14, repeater 15, or telephone repeater 18 connected to the transmission lines 12a and 12b.

Downlink signals from the transmission unit 24 to the fire detector 14, repeater 15 or telephone repeater 18 are transmitted in voltage mode. This voltage-mode signal is transmitted as a voltage pulse that causes the line voltage of the transmission lines 12a, 12b to vary, for example, between 18 and 30 volts.

On the other hand, an upstream signal from fire detector 14, repeater 15 or telephone repeater 18 to receiver 10 is transmitted in the current mode. In this current mode, a signal current is passed through the transmission lines 12a and 12b at the timing of bit 1 of the transmission data, and an upstream signal is transmitted to the receiver as a so-called current pulse train.

(Fire monitoring control unit)
The reception control unit 22 of the receiver 10 is provided with a function of a fire monitoring control unit 44 as a function realized by execution of a program by the CPU.

During normal monitoring, the fire monitoring control unit 44 instructs the transmission unit 24 to transmit a broadcast batch AD conversion signal including a batch AD conversion command at regular intervals. Upon receiving the converted signal, the fire sensor 14 detects and holds the smoke density or temperature as sensor data, and the repeater 15 detects and holds the transmitter signal at that time. Subsequently, the fire monitoring control unit 44 transmits a call signal including polling commands sequentially designating terminal addresses.

When the fire sensor 14 receives a call signal having an address that matches its own address, it transmits a response signal including the sensor data held at that time to the receiver 10 . Also, the fire sensor 14 transmits a fire interrupt signal to the receiver 10 when detecting a fire.

When repeater 15 also receives a call signal having an address that matches its own address, repeater 15 transmits to receiver 10 a response signal including the transmitter signal held at that time. Further, when the repeater 15 receives a transmitter signal that is turned on by pressing the transmitter button 36a of the transmitter 36, it transmits a fire interrupt signal to the receiver 10 as a fire notification signal in the same manner as the fire sensor 14.

When the fire monitoring control unit 44 receives the fire interrupt signal through the transmission unit 24, it transmits a group search command signal to identify the group including the fire detector 14 and the repeater 15 that are detecting the fire. Identify the address of the fire detector 14 or the repeater 15 detecting the fire by transmitting a search command signal within the group, output the fire alarm, display the fire occurrence address or the transmitter address, and then identify it. Control is performed to collect and monitor fire data from the fire detector 14 or relay 15 .

(telephone main unit control unit)
The reception control unit 22 of the receiver 10 is provided with the function of the telephone base unit control unit 46 as a function realized by execution of a program by the CPU.

The telephone base unit control unit 46 instructs the transmission unit 24 to transmit/receive command signals necessary for various call control to/from the telephone repeater 18 via the transmission lines 12a and 12b, and to connect the telephone lines 16a and 16b. It controls call connection and call cutoff (call disconnection) between the telephone base unit 28 and the telephone cordless handset 20 via.

Call control by the telephone base unit control unit 46 of this embodiment includes the following.
(1) Call control by calling a designated telephone cordless handset.
(2) Call control by calling from a telephone cordless handset.
(3) Call switching control by calling from another telephone cordless handset during a call with a telephone cordless handset.
(4) Three-party communication control between a telephone base unit and two telephone cordless handsets.
(5) Call control by connecting a maintenance telephone cordless handset to the telephone jack.

Among these, in the call control of (1) to (4), a call origination command signal, an incoming call response command signal, a hold command signal, a command signal during a call, and the like are used as command signals. The call command signal is a signal requesting a call call to the telephone handset. The incoming call response command signal is a signal that is transmitted when the telephone handset is off-hooked upon receiving the outgoing call command signal. The hold command signal is a signal that instructs the telephone handset to output a hold tone. The call-during command signal is a signal that instructs the telephone handset to output a call-during sound. Details of communication control using such command signals will be clarified later.

(Speech detection circuit)
When the plug 42 of the maintenance telephone cordless handset 40 is inserted into the telephone jack 38 of the transmitter 36 and connected to the telephone lines 16a and 16b, the line current flows through the call detection circuit unit 35 provided in the receiver 10. This line current is detected and a call detection signal is output to the reception control section 22 .

When the telephone base unit control unit 46 provided in the reception control unit 22 receives the call detection signal from the call detection circuit unit 35, the speaker of the alarm unit 33 outputs a ringing tone based on the call connection of the maintenance telephone cordless handset 40. When the person in charge picks up the telephone base unit 28 upon hearing this, the telephone base unit 28 is connected to the telephone lines 16a and 16b by the telephone base unit circuit unit 26 based on the off-hook detection of the telephone base unit 28, and the maintenance call is made. Control to establish a call connection with the handset 40 is performed.

[Telephone repeater configuration]
2 is a block diagram illustrating an embodiment of the telephone repeater of FIG. 1; FIG. As shown in FIG. 2, the circuit section of the telephone repeater 18 is provided with a telephone cordless handset control section 48 and a transmission section 50 as circuit sections on the transmission lines 12a and 12b side, , a connection switching unit 52, a control sound generating unit 54, a pair of switch circuit units 56, a transformer 58, a hook switch 60, and a speaker 61 are provided. .

The telephone handset control unit 48 is composed of a computer circuit or the like having a CPU, a memory, various input/output ports, etc. The functions of the telephone handset control unit 48 are realized by executing a program by the CPU.

Call control by the telephone cordless handset control unit 48 of this embodiment includes the following.
(1) Call control by calling the telephone base unit.
(2) Call control by calling from the telephone base station.
(3) Call switching control by calling a telephone base unit during a call with another telephone cordless handset.
(4) Three-party communication control between a telephone base unit and two telephone cordless handsets.

In these call controls, call origination command signals, incoming call response command signals, hold command signals, during call command signals, etc. are used as command signals, and the details of call control will be clarified later.

The transmission unit 50 transmits/receives various command signals necessary for call control to/from the transmission unit 24 of the receiver 10 shown in FIG. . Further, the transmission unit 50 receives the downstream signal from the receiver 10 in voltage mode, and transmits the upstream signal to the receiver 10 in current mode.

The connection switching unit 52 operates according to instructions from the telephone cordless handset control unit 48 to turn on and off a switch circuit unit 56 using a relay contact, a semiconductor switch element, or the like, thereby connecting the telephone cordless handset 20 to the telephone lines 16a and 16b. and cut (separate).

The control tone generation unit 54 operates according to instructions from the telephone slave unit control unit 48 to generate audio signals such as a predetermined line connection tone, a ringing tone for the telephone base unit, a hold tone, and a call-busy tone. Also, in response to a call from the telephone base station, an audio signal of ringing tone is generated and output to the speaker 61 .

A transformer 58 has a primary winding connected to the telephone lines 16a and 16b and a secondary winding connected to the receiver 45, and receives only AC voice signals from the telephone lines 16a and 16b superimposed with a predetermined DC voltage. The sound is picked up by the receiver 45, amplified, and howling is prevented. A transmitter 47 of the telephone cordless handset 20 is connected to the telephone lines 16a and 16b.

The hook switch 60 detects off-hook or on-hook of the telephone slave unit 20 and outputs an off-hook detection signal or an on-hook detection signal to the telephone slave unit control unit 48 .

The telephone circuit on the telephone lines 16a and 16b side in FIG. 2 shows a basic analog telephone circuit, and is not limited to this. A digital telephone circuit may be used in which the audio signal is received, DA-converted and output to the receiver 45, and the audio signal from the transmitter 47 is AD-converted and transmitted.

[Structures of the telephone base unit circuit unit and the call detection circuit unit of the receiver]
FIG. 3 is a block diagram showing an embodiment of the telephone base unit circuit section and the speech detection circuit section provided in the receiver of FIG.

(Telephone base unit circuit)
As shown in FIG. 3, the telephone base unit circuit unit 26 is provided with a connection switching unit 62, a control sound generation unit 64, a pair of switch circuit units 66, a transformer 68 and a hook switch 70. The telephone base unit 28 has a receiver. 72 and a microphone 74 are provided. A telephone line voltage Vt of DC 48 V, for example, is applied between the telephone lines 16a and 16b from the telephone base unit circuit section 26. FIG.

The connection switching unit 62 operates according to instructions from the telephone master unit control unit 46 in FIG. .

The control sound generation unit 64 operates according to instructions from the telephone base unit control unit 46, and generates audio signals such as a predetermined line connection sound, a ringing tone indicating a call to the telephone cordless handset 20, a holding tone, and a call-busy tone. The signal is output to the receiver 72 of the telephone main unit 28, and an audio signal of a ringing tone is generated in response to a call from the telephone slave unit 20 or the maintenance telephone slave unit 40, and is output to a speaker provided in the alarm unit 33, for example.

A transformer 68 has a primary winding connected to the telephone lines 16a and 16b, and a secondary winding connected to a receiver 72. A voice signal which becomes alternating current from the telephone lines 16a and 16b superimposed with a predetermined telephone line voltage Vt is generated. Only the receiver 72 picks up the sound and amplifies it, further preventing howling. A transmitter 74 of the telephone base station 28 is connected to the telephone lines 16a and 16b.

The hook switch 70 detects off-hook or on-hook of the telephone master unit 28 and outputs an off-hook detection signal or an on-hook detection signal to the telephone master unit control unit 46 .

It should be noted that the telephone circuits on the telephone lines 16a and 16b side in FIG. 3 show basic analog telephone circuits, like the telephone repeater 18 in FIG. or a digital telephone circuit.

(Speech detection circuit)
As shown in FIG. 3, in the call detection circuit section 35, resistors 76, 78 and 80 are connected in series between a telephone line 16a to which a predetermined line voltage Vt is applied and a telephone line 16b on the negative side. The telephone line 16 a is led out to the terminal side from between the resistors 76 and 78 , and the call detection signal is extracted from between the resistors 78 and 80 and output to the reception control section 22 .

As shown in FIG. 1, when the plug 42 of the maintenance telephone cordless handset 40 is inserted into the telephone jack 38 of the transmitter 36 and the maintenance telephone cordless handset 40 is connected between the telephone lines 16a and 16b, the maintenance telephone cordless handset 40 is connected. also has a telephone circuit equipped with a transformer, receiver and transmitter, which is the same as the telephone handset 20 shown in FIG. 2 or the telephone master unit 28 shown in FIG. A predetermined line current flows by connecting between the telephone lines 16a and 16b.

The line current associated with the connection of the maintenance telephone 40 to the telephone jack 38 flows through the telephone line 16a through the resistor 76 of the call detection circuit 35 shown in FIG. Then, the detection voltage, which is output as the call detection signal divided by the resistors 78 and 80, also drops, and the telephone master unit control unit 46 of the reception control unit 22 disconnects the maintenance telephone cordless handset 40 from the drop in the level of the call detection signal. Then, a ringing tone is output and a screen display indicating the call of the maintenance telephone cordless handset 40 is performed.

[Call control of telephone base unit and telephone cordless handset]
(Designated Calling of Telephone Handsets by Telephone Headset)
FIG. 4 is a time chart showing call control for specifying and calling a telephone slave unit by the telephone master unit. 18 telephone cordless handset control unit 48 performs a control operation.

When the person in charge picks up the telephone base unit 28 to contact the person in charge in the restricted area, the off-hook detection signal is output from the hook switch 70 , and as shown in FIG. It is determined that the telephone base unit 28 has been off-hooked, and the process proceeds to step S2, in which a handset calling screen is displayed on the display 30, and at the same time, the control sound generation unit 64 is instructed to say, for example, "two" from the telephone base unit 28 receiver 72. Outputs a line connection sound that is a continuous sound.

On the handset call screen displayed on the display 30 in step S2, key buttons arranged in an array of 0, 1 to 9, #, * are displayed. When the operation is performed, the telephone base unit control unit 46 recognizes the handset calling operation in step S3, proceeds to step S4, and instructs the transmission unit 24 to send a call command signal designating the repeater address corresponding to the called telephone number. are sent to the transmission lines 12a and 12b. At this time, the telephone main unit 28 outputs a ringing tone for the telephone cordless handset.

Upon receiving the call command signal designating its own address from the transmission unit 50 via the transmission lines 12a and 12b, the telephone handset control unit 48 of the telephone repeater 18 instructs the control sound generation unit 54 in step S5 to A call is made by outputting a ringing tone from the speaker 61 .

When the person in charge at the site picks up the telephone cordless handset 20 for this call call, the off-hook is discriminated in step S6 by the off-hook detection signal from the hook switch 60, and in step S7, the transmission unit 50 is instructed to include the own address. An incoming call response command signal is transmitted to the receiver 10 via the transmission lines 12a and 12b, and then in step S8 , the connection switching unit 52 is instructed to turn on the switch circuit unit 56, and the telephone cordless handset 20 side is switched on. A call connection is made to connect the telephone circuit unit to the telephone lines 16a and 16b.

Upon receiving the incoming call response command signal transmitted from the telephone repeater 18 in step S7, the telephone base unit control unit 46 of the receiver 10 stops outputting the ringing tone to the telephone cordless handset 20, and switches the connection in step S9. 62 to turn on the switch circuit unit 66 to connect the telephone master unit circuit unit 26 of the telephone master unit 28 to the telephone lines 16a and 16b.

As a result, the telephone cordless handset 20 called the telephone main unit 28 can be connected to the telephone lines 16a and 16b to make a call. When the call ends, the telephone master unit 28 and the telephone cordless handset 20 are returned, the on-hook is determined in step S10 or S12, and the call is cut by disconnecting from the telephone lines 16a and 16b in step S11 or S13, and the call ends.

(Calling the telephone main unit by the telephone cordless handset)
FIG. 5 is a time chart showing call control for calling a telephone base unit by a telephone cordless handset. When the person in charge in the restricted area picks up the telephone cordless handset 20 to contact the receiver 10 side, an off-hook detection signal is output from the hook switch 60, and as shown in FIG. In S21, off-hook of the telephone handset 20 is discriminated, and in step S22, the control sound generating section 54 is instructed to output a continuous line connection tone such as "Two" from the handset 45 of the telephone handset 20.

Subsequently, in step S23, the telephone cordless handset control section 48 instructs the transmission section 50 to transmit a call command signal including its own address to the receiver 10 via the transmission lines 12a and 12b. At this time, the telephone handset 20 outputs a ringing tone to the telephone master set 28 .

When receiving the call command signal including the repeater address from the transmission unit 50 via the transmission lines 12a and 12b, the telephone base unit control unit 46 of the receiver 10 instructs the alarm unit 33 to call from the speaker in step S24. A call is made by outputting a sound, and then the process proceeds to step S25 to display a handset call screen on the display 30 to display the telephone number of the handset to be called.

When the person in charge picks up the telephone master unit 28 provided in the receiver 10 in response to the ringing tone in step S24, the telephone master unit control unit 46 determines whether the telephone master unit 28 is off-hook in step S26, and in step S27. Instructing the transmitting section 24 to transmit an incoming call response command signal designating the address of the called repeater to the transmission lines 12a and 12b, and instructing the connection switching section 62 to turn on the switch circuit section 66 in step S28. Thus, the telephone master unit 28 is connected to the telephone lines 16a and 16b.

On the other hand, upon receiving the incoming call response command signal designating its own address transmitted from the receiver 10 in step S27, the telephone slave unit control unit 48 stops ringing the telephone base unit 28 and proceeds to step S29. By instructing the connection switching unit 52 to turn on the switch circuit unit 56, the telephone cordless handset 20 is connected to the telephone lines 16a and 16b.

As a result, the telephone main unit 28 called the telephone cordless handset 20 can be connected to the telephone lines 16a and 16b to make a call. When the call ends, the telephone cordless handset 20 and the telephone base unit 28 are returned, the on-hook is discriminated in step S30 or S32, and the call is disconnected from the telephone lines 16a and 16b in step S31 or S33, thereby completing the call connection. .

(Calling the telephone cordless handset while the telephone base unit is talking)
FIG. 6 is a time chart showing call control when the telephone base unit goes off-hook during a call with another telephone cordless handset.

During the call from the telephone base unit shown in FIG. 4 or the call from the telephone cordless handset shown in FIG. After the telephone controller 48 determines in step S41 that the telephone cordless handset 20 is off-hooked and outputs a line connection tone from the telephone cordless handset 20 in step S42, a call command signal including its own address is sent to the transmission lines 12a and 12a in step S43. 12b to the receiver 10, and a ringing tone is output from the speaker of the alarm unit 33. FIG.

In this case, the telephone master unit control unit 46 of the receiver 10 receives the call command signal transmitted from the telephone repeater 18 in step S43, but confirms in step S44 that it is in communication with another telephone slave unit. After making a determination and displaying a new handset call on the handset call screen on the display 30 in step S45, a call-in-progress command signal designating the address of the telephone repeater 18 that transmitted the call command signal is sent to the transmission line in step S46. 12a and 12b.

Upon receiving the command signal during communication designating its own address via the transmission lines 12a and 12b, the telephone cordless handset control unit 48 of the telephone repeater 18 instructs the control sound generation unit 54 to control the telephone cordless handset 20 in step S47. A predetermined tone is output from the receiver 45 of the telephone.

Therefore, the person in charge who picked up the telephone cordless handset 20 learns that the telephone base unit 28 is busy and returns the telephone cordless handset 20 to its original position. Terminate the connection.

(During a call between a telephone main unit and a telephone cordless handset, call switching by calling another telephone cordless handset)
FIG. 7 is a time chart showing call control when a call is received from another telephone slave unit during a call between a telephone base unit and a telephone slave unit and switching is performed. Here, the telephone repeater 18 that made the call first is called the telephone repeater 18-1, the telephone repeater 18 that made the next call is called the telephone repeater 18-2, and telephone terminals provided in each of them are used. The phone controller 48 is assumed to be telephone cordless handset controllers 48-1 and 48-2, and the telephone cordless handset 20 to telephone cordless handsets 20-1 and 20-2.

As shown in FIG. 7, by calling from the telephone cordless handset control unit 48-1 of the telephone repeater 18-1, communication control between the telephone cordless handset control unit 46 of the receiver 10 and the telephone cordless handset 28 and the telephone handset The telephone 20-1 is making a call connection. Since the call control in steps S51 to S59 in this case is the same as in steps S21 to S29 in FIG. 5, the description thereof is omitted.

Subsequently, when the telephone cordless handset control unit 48-2 of another telephone repeater 18-2 determines that the telephone cordless handset 20-2 is hooked off in step S60, after outputting a line connection tone from the telephone cordless handset 20-2, In step S61, the telephone master unit 28 transmits a calling command signal including its own address to the receiver 10 in communication via the transmission lines 12a and 12b.

Upon receiving the call command signal transmitted from the telephone repeater 18-2, the telephone base unit control unit 46 of the receiver 10 displays the calling of the telephone cordless handset 20-2 on the display 30 in step S62. to output a predetermined warning sound from the speaker of the alarm unit 33.

As a result, when the person in charge during the call knows that there is a call from another telephone cordless handset 20-2 and performs a selection operation, the telephone base unit control unit 46 selects another telephone cordless handset 20-2 in step S63. Upon recognizing the selection operation of -2, the process proceeds to step S64 to transmit an incoming call response command signal designating the address of the telephone repeater 18-2 to the transmission lines 12a and 12b, which is received by the telephone repeater 18-2. , the telephone cordless handset control unit 48-2 connects the telephone cordless handset 20-2 to the telephone lines 16a and 16b in step S65.

Further, in step S66, the telephone master unit control unit 46 transmits to the transmission lines 12a and 12b a holding command signal designating the address of the telephone repeater 18-1 of the telephone cordless handset 20-1 which has been in communication up to that point. , is received by the telephone repeater 18-1, and the telephone cordless handset control unit 48-1 cuts off the call by disconnecting the telephone cordless handset 20-1 from the telephone lines 16a and 16b in step S67, and disconnects the telephone cordless handset 20-1 from the telephone cordless handset 20-1. Output a predetermined hold tone.

After that, when the call between the telephone base unit 28 and the telephone cordless handset 20-2 is terminated and the telephone cordless handset control unit 48-2 determines on-hook in step S68, the process advances to step S69, and a call termination command signal including its own address is output. It transmits to the transmission lines 12a and 12b.

When the telephone base unit control unit 46 determines that the call end command signal has been received from the telephone repeater 18-2, in step S70, the telephone master unit control unit 46 transmits a hold release command signal designating the address of the telephone repeater 18-1 on hold through the transmission line. 12a and 12b, and upon receiving the hold release command signal designating its own address, the telephone slave unit control unit 48-1 stops the output of the hold tone from the telephone slave unit 20-1 in step S71. The telephone 20-1 is connected to the telephone lines 16a and 16b again, and the call with the telephone master unit 28 is resumed.

(Three-way call)
FIG. 8 is a time chart showing call control of a three-way call by a telephone base unit and two telephone cordless handsets. 20 and telephone cordless handset controller 48 are telephone repeaters 18-1 and 18-2, telephone cordless handsets 20-1 and 20-2 and telephone cordless handset controllers 48-1 and 48-2, respectively.

In the three-way call shown in FIG. 8, the control of steps S81-S92 is the same as that of steps S51-S62 shown in FIG. 7, so the description thereof will be omitted.

In the three-way call in FIG. 8, while the telephone base unit 28 and the telephone cordless handset 20-1 are connected, the call command signal is transmitted from the telephone repeater 18-2 of the telephone cordless handset 20-2. Then, in step S92, when the call of the telephone handset 20-2 is displayed on the screen of the display 30, a three-way call selection button is displayed in the display screen, and the selection operation of the three-way call can be performed.

Therefore, when the telephone base unit control unit 46 recognizes the selection operation of the three-way call in step S93, the process proceeds to step S94, and an incoming call command signal specifying the address of the telephone repeater 18-2 that transmitted the outgoing call command signal is transmitted. The telephone cordless handset control unit 48-2 receives the data and connects the telephone cordless handset 20-2 to the telephone lines 16a and 16b in step S95.

Subsequently, in step S96, the telephone base unit control unit 46 sequentially transmits a three-way call command signal designating the addresses of the telephone repeaters 18-1 and 18-2 to the transmission lines 16a and 16b. At steps S97 and S98, the handset controllers 48-1 and 48-2 output a predetermined message notifying the start of the three-way call from the handset sets 20-1 and 20-2. In step S99, the three-way call shown in steps S100 and S101 of the telephone handset control units 48-1 and 48-2 is performed by connecting the telephone main unit 28 and the telephone handset units 20-1 and 20-2 to the telephone lines 16a and 20-2. 16b.

Here, by connecting a plurality of telephone cordless handsets 20 in addition to the telephone main unit 28 to the telephone lines 16a and 16b, four-way and five-way calls can be realized. As the number of connections increases, the level of voice signals transmitted by the telephone lines 16a and 16b decreases, deteriorating call quality. It can be said that a three-way call in which three telephones connected to each other are connected to the telephone lines 16a and 16b is optimal.

(Call control performed by connecting a maintenance telephone cordless handset to the telephone jack)
FIG. 9 is a time chart showing call control performed by connecting an emergency telephone cordless handset to a telephone jack.

As shown in FIG. 9, in order for the person in charge who carries the maintenance telephone cordless handset 40 to contact the receiver 10 side, the plug 42 of the maintenance telephone cordless handset 40 is inserted into the telephone jack 38 of the transmitter 36 in step S111. Then, the maintenance telephone cordless handset 40 is connected to the telephone lines 16a and 16b, line current flows, and the call detection circuit section 35 of the receiver 10 detects a drop in the line voltage in step S112, and the telephone base unit control section 46 Outputs a call detection signal.

Upon receipt of the call detection signal from the call detection circuit 35, the telephone base unit control unit 46 instructs the alarm unit 33 to output a ringing tone from the speaker in step S113 to make a call, and then step S114. , the display 30 displays the call of the maintenance telephone cordless handset 40 on the screen and informs the user.

When the person in charge picks up the telephone master unit 28 provided in the receiver 10 in response to the ringing tone in step S113, the telephone master unit control unit 46 determines whether the telephone master unit 28 is off-hook in step S115, and in step S116. By instructing the connection switching unit 62 to turn on the switch circuit unit 66 , the telephone base unit 28 is connected to the telephone lines 16 a and 16 b for communication, and a communication connection is established with the maintenance telephone cordless handset 40 .

When the call ends, the telephone master unit 28 is returned, and the telephone master unit control unit 46 determines in step S117 that the telephone master unit 28 is on-hook, and in step S118 cuts off the call by disconnecting it from the telephone lines 16a and 16b, thereby completing the call connection. finish.

At the end of the call, the maintenance telephone cordless handset 40 is removed from the telephone jack 38 in step S119 and disconnected from the telephone lines 16a and 16b. The output of the report detection signal stops.

[Fire alarm system with emergency phone system and maintenance phone system]
(Outline of equipment)
FIG. 10 is an explanatory diagram showing an embodiment of a fire alarm system having call control functions for emergency telephone equipment linked to emergency broadcasting equipment and maintenance telephone equipment used for maintenance and inspection.

As shown in FIG. 10, transmission lines 12a and 12b of fire alarm equipment, emergency telephone lines 16c and 16d of emergency telephone equipment, and maintenance telephone lines 84a and 84b of maintenance telephone equipment are led out from the receiver 10 to the warning area. there is

The transmission lines 12a and 12b are connected to a plurality of fire sensors 14, repeaters 15, and addressable transmitters 37 each having a transmission function and having unique addresses. A plurality of telephone repeaters 18 provided with emergency telephone cordless handsets 20a are connected to the transmission lines 12a, 12b and the emergency telephone lines 16c, 16d. function and call control function.

A transmitter 36 is connected to the repeater 15 of the transmission lines 12a and 12b. The transmitter 36 is provided with a transmitter button 36a. When the transmitter button 36a is turned on by pushing the transmitter button 36a in case of fire, a transmission signal is output to the repeater 15, and the receiver 10 is sent from the repeater 15 via the transmission lines 12a and 12b. A fire alarm signal is sent to and a fire alarm is output.

A telephone jack 38 is provided in the transmitter 36, and the telephone jack 38 is connected to maintenance telephone lines 84a and 84b. When the plug 42 of the maintenance telephone cordless handset 40a carried by the person in charge is inserted into the telephone jack 38, the maintenance telephone cordless handset 40a is connected to the maintenance telephone lines 84a and 84b. A call connection is established with the , and a call can be made.

Similarly to the transmitter 36, the addressable transmitter 37 is also provided with a transmitter button 37a. When the transmitter button 37a is turned on by pressing the transmitter button 37a in the event of a fire, a fire notification is sent from the transmitter 37b to the receiver 10 via the transmission lines 12a and 12b. A signal is sent and a fire alarm is output.

The addressable transmitter 37 is provided with a telephone jack 38 like the transmitter 36, and the telephone jack 38 is connected to maintenance telephone lines 84a and 84b. When the plug 42 of the maintenance telephone cordless handset 40a carried by the person in charge is inserted into the telephone jack 38, the maintenance telephone cordless handset 40a is connected to the maintenance telephone lines 84a and 84b. A call connection is established with the , and a call can be made.

A telephone main unit 28 is provided in the receiver 10 corresponding to the emergency telephone cordless handset 20a and the maintenance telephone cordless handset 40a.

Further, in this embodiment, in addition to the fire alarm equipment, an emergency broadcasting equipment is provided. A broadcasting line 92 is drawn out for each system, and a speaker 94 for broadcasting is connected to the broadcasting line 92 .

(Functional configuration of receiver)
The receiver 10 includes a reception control unit 22, a transmission unit 24, an emergency telephone master unit circuit unit 26a, a maintenance telephone master unit circuit unit 26b , a telephone master unit 28, a display 30 with a touch panel, a display unit 31, an operation unit 32, It has an alarm unit 33 equipped with a speaker, an alarm transfer unit 34, a call detection circuit unit 35, and a switching unit 82.

The reception control unit 22 of the receiver 10 is provided with the function of the telephone base unit control unit 46 as a function realized by execution of a program by the CPU. Since the fire monitoring control unit 44 is the same as in the embodiment of FIG. 1, its description is omitted.

(telephone main unit control unit)
The telephone main unit control unit 46 controls calls for incoming calls to the emergency telephone cordless handset 20a, calls control for incoming calls to the maintenance telephone cordless handset 40a, and performs call control when calls to the emergency telephone cordless handset 20a and the maintenance telephone cordless handset 40a overlap. control.

The telephone repeater 18 is the same as shown in FIG. 2, and the speech detection circuit section 35 is the same as that shown in FIG. The emergency telephone master circuit unit 26a and the maintenance telephone master unit circuit unit 26b are basically the same as the telephone master unit circuit unit 26 in FIG. The difference is that the base phone 28 is switched to the emergency phone base circuit 26a side when an emergency call is received, and the base phone 28 is switched to the maintenance phone base circuit unit 26b when a maintenance call is received.

[Call control]
The telephone base unit control unit 46 is based on a call command signal including a caller address from the emergency telephone cordless handset 20a via the telephone repeater 18 and the repeater 15 , and/or call detection from the call detection circuit unit 35. Based on the signal, the display 30 performs the operation display necessary for controlling the communication with the telephone main unit 28, and the following communication control is performed based on the screen operation and the like.

(Incoming maintenance call)
When the plug 42 of the maintenance telephone cordless handset 40a carried by the inspection personnel is inserted into the telephone jack 38 of the transmitter 36 or the addressable transmitter 37 and connected to the maintenance telephone lines 84a and 84b, the maintenance telephone cordless handset is connected. The call detection circuit section 35 of the receiver 10 detects the line current flowing through the connection of the telephone 40 a and outputs a call detection signal to the telephone base station control section 46 .

Upon receiving the call detection signal from the call detection circuit 35, the telephone base unit control unit 46 displays an incoming maintenance call on the display 30, and emits a predetermined maintenance call ringtone (maintenance call ringtone) from the speaker of the alarm unit 33. Then, the switching unit 82 switches the telephone master unit 28 to the maintenance telephone master unit circuit unit 26b.

When a disaster prevention manager or the like on the side of the receiver 10 who has learned of the incoming maintenance call picks up the telephone master unit 28, the telephone master unit 28 detects that the telephone master unit 28 is off-hook, and the maintenance telephone master unit circuit section 26b is detected. And the maintenance telephone handset 40a is connected via the maintenance telephone lines 84a and 84b to make necessary calls.

(Emergency call received)
When a security guard or the like finds a fire during patrol, picking up the emergency telephone cordless handset 20a installed nearby turns on the hook switch, and the receiver 10 is connected via the telephone repeater 18 and the repeater 15 . A call command signal containing the originating address is sent to the . The telephone master unit control unit 46 of the receiver 10 that has received the call command signal from the emergency telephone cordless handset 20a displays the incoming emergency call on the display 30 along with the originating location based on the originating address. A predetermined emergency call ringing tone (emergency call ringing tone) is output, and the switching unit 82 switches the telephone master unit 28 to the emergency telephone master unit circuit unit 26a.

When a disaster prevention manager or the like on the receiver 10 side who has learned of such an emergency call picks up the telephone master unit 28, the telephone master unit 28 disconnects the emergency telephone lines 16c and 16d based on off-hook detection of the telephone master unit 28. A call connection is established with the handset telephone handset 20a originating via the mobile phone, and a necessary call can be made.

Further, when the telephone master unit control unit 46 of the receiver 10 receives the call command signal by picking up the emergency telephone cordless handset 20a via the telephone repeater 18 and the repeater 15 , the telephone master unit control unit 46 receives the call command signal within a predetermined time, for example, 10 seconds. Within the time limit, the alarm transfer unit 34 is instructed to output to the emergency broadcast board 90 a fire transmission alarm transfer signal including the fire occurrence area based on the caller address.

The emergency broadcast panel 90, which receives the fire transmission report transfer signal from the receiver 10, designates the fire occurrence floor and the floor directly above the fire occurrence area as the broadcast area, and broadcasts the fire. This fire announcement is, for example, "Fire! Fire! In addition, the emergency broadcast board 90 makes an emergency broadcast to the whole building all at once after a predetermined time has elapsed since the start of the emergency broadcast.

(Duplicate incoming emergency calls)
Further, when calls from a plurality of emergency telephone cordless handsets 20a overlap, the telephone base unit control unit 46 of the receiver 10 displays a plurality of callers on the display 30, It controls communication connection with the telephone cordless handset 20a. At this time, the unselected emergency telephone cordless handset is controlled to output holding tone.

(Duplicate calls for emergency and maintenance calls)
In addition, when the emergency telephone cordless handset 20a and the maintenance telephone cordless handset 40a receive an incoming call at the same time, the telephone master unit control unit 46 of the receiver 10 displays the incoming emergency telephone call and the incoming maintenance telephone call on the display 30, and operates the screen. control to connect the emergency telephone cordless handset 20a or the maintenance telephone cordless handset 40a of the caller selected by . At this time, control is performed to output hold tone from the unselected telephone slave units. In addition, priority may be set in advance for incoming emergency calls and maintenance calls, and a caller with a higher priority may be selected and connected.

(Another form of display for emergency calls and maintenance calls)
Also, an incoming call to the emergency telephone cordless handset 20a may be displayed on the display 30, and an incoming call to the maintenance telephone cordless handset 40a may be displayed by a maintenance telephone light arranged in the panel. Since the emergency telephone cordless handset 20a transmits an emergency call origination signal including a unique caller address, it is possible to recognize the installation location, so it is preferable to indicate the caller on the display 30. FIG.

(Communication of connection location identification information when connecting maintenance telephone cordless handset)
When the maintenance telephone cordless handset 40a is connected to the transmitter 36 or the addressable transmitter 37, the transmitter 36 or the addressable transmitter 37 detects the connection of the plug and receives the address information on the transmission circuit for the receiver 10. 10, and the receiver 10 displays information specifying the transmitter 36 or the addressable transmitter 37 to which the maintenance telephone cordless handset 40a is connected from the information. By making it possible to display the calling party of either the emergency telephone cordless handset 20a or the maintenance telephone cordless handset 40a, it becomes possible to assist in determining which call should be prioritized.

[Modification of the present invention]
(telephone jack)
In the above embodiment, the telephone jack is provided in the transmitter, but the telephone jack may be provided in an appropriate terminal device as necessary. Also, the maintenance telephone equipment is not limited to a portable type, and may be a maintenance telephone cordless handset that is fixedly installed in the restricted area and inserted into a telephone jack for use.

Also, a telephone jack may be provided in the receiver 10 . For example, between the telephone lines 16a and 16b drawn to the terminal side from the call detection circuit section 35 shown in FIG. In this case, a call connection can be established between the maintenance telephone cordless handsets by connecting the maintenance telephone cordless handsets to the respective telephone jacks of the receiver and the transmitter by plugging.

(Maintenance handset priority and handset hold tone)
The telephone base unit control unit 46 of the above-described embodiment detects that the maintenance telephone cordless handset 40 is connected to the telephone jack 38 during the call connection between the telephone base unit 28 and any emergency handset 20 . A call call of a telephone cordless handset 40a is notified, switching to a call connection of a maintenance telephone cordless handset 40, and a holding command signal specifying an address of a telephone relay part 18 of an emergency telephone cordless handset 20 during a call is transmitted to make an emergency call. The handset 20 is disconnected from the telephone lines 16a and 16b to output a predetermined on-hold tone.

As a result, when the maintenance telephone cordless handset 40 is connected to the telephone jack 38 during a call between the telephone base unit 28 and the emergency telephone cordless handset 20, the call connection between the telephone base unit 28 and the emergency cordless handset 20 is put on hold. Therefore, the communication with the maintenance telephone handset 40 can be preferentially performed.

Further, when the call between the telephone base unit 28 and the maintenance telephone cordless handset 40 ends, the telephone base unit control unit 46 transmits a hold release command signal designating the address of the call relay unit 18 of the emergency telephone cordless handset 20 on hold. Then, the emergency telephone cordless handset 20 may be connected to the telephone lines 16a and 16b to restore the call between the telephone master set 28 and the emergency telephone cordless handset 20.例文帳に追加

(Calls between telephone handsets)
The above embodiment takes as an example the call control between the telephone base station of the receiver and the telephone cordless handset installed in the restricted area, but it is not limited to this, and the telephone number is input to the telephone repeater. By providing an operation display unit for calling a call, it is also possible to make a call between telephone slave units by calling from one telephone slave unit to another telephone slave unit.

(hands-free call function)
In the above-described embodiment, a call is made using a telephone base unit and a telephone cordless handset. However, the present invention is not limited to this. It may be installed on a panel surface or the like near the telephone, and a hands-free call function may be provided in which the telephone is switched between a microphone and a speaker by operating a predetermined switch to make a call without using the telephone.

(P-type receiver)
The above embodiment takes as an example a fire alarm system in which an R-type fire sensor is connected via a transmission line from an R-type receiver. Similar communication control can be realized by sending and receiving various command signals using the sensor line for the fire alarm system to which an addressable fire sensor having a setting and transmission function is connected.

(others)
Moreover, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values shown in the above embodiments.

10: receivers 12a , 12b : transmission line 14: fire detector 15: relays 16a, 16b: telephone lines 16c, 16d: emergency telephone line 18: telephone repeater 20: telephone cordless handset 20a: emergency telephone cordless handset 22 : Receiving control units 24, 50: Transmission unit 26: Telephone master unit circuit unit 26a: Emergency telephone master unit circuit unit 26b: Maintenance telephone master unit circuit unit 28: Telephone master unit 30: Display 35: Call detection circuit unit 36: Originating Machine 37: Addressable transmitter 38: Telephone jack 40: Maintenance telephone cordless handset 40a: Maintenance telephone cordless handset 44: Fire monitoring control unit 46: Telephone base unit control unit 45, 72: Handsets 47, 74: Transmitter 48: Telephone Slave unit control units 52, 62: connection switching units 54, 64: control sound generation units 56, 66: switch circuit units 58, 68: transformers 60, 70: hook switches 61 , 94 : speakers 76, 78, 80: resistor 82 : Switching units 84a, 84b: Maintenance telephone line 90: Emergency broadcast board 92: Broadcast line

Claims (5)

a transmission line to which a terminal device including a fire detector with a unique address is connected, which is led out from the receiver to the security area;
a telephone line that is drawn from the receiver together with the transmission line into the security zone and that connects a telephone base station provided in the receiver and a telephone slave station installed in the security zone;
In a fire alarm system equipped with
a telephone master unit control unit provided in the receiver for controlling call connection of the telephone master unit;
a telephone repeater that is connected to the transmission line and the telephone line, has a unique address set therein, and controls call connection of the telephone cordless handset;
is provided, wherein the telephone base unit control unit and the telephone repeater transmit and receive a predetermined call control signal through the transmission line to control the call connection of the telephone base unit and the telephone cordless handset to the telephone line, Furthermore,
a telephone jack connected to the telephone line;
a maintenance telephone cordless handset detachably connected to the telephone jack;
is provided,
The telephone base unit control unit
when the maintenance telephone cordless handset is connected to the telephone jack, the telephone main unit is connected to the telephone line to make a call connection to the maintenance telephone cordless handset ;
When the connection of the maintenance telephone cordless handset to the telephone jack is detected during the call connection between the telephone main unit and one telephone cordless handset, a call call of the maintenance telephone cordless handset is notified, and the maintenance telephone cordless handset is called. At the same time, a hold command signal designating the address of the telephone relay unit of the first telephone slave unit is transmitted to disconnect the first telephone slave unit from the telephone line to output a predetermined on-hold tone. A fire alarm system characterized by:
In the fire alarm system according to claim 1,
The receiver includes a call detection circuit unit that detects a change in line voltage when the maintenance telephone cordless handset is connected to the telephone jack and outputs a call detection signal. A fire alarm system characterized in that, when the call detection signal is input from a detection circuit unit, the telephone master unit is connected to the telephone line and the maintenance telephone slave unit is connected to the telephone master unit.
In the fire alarm equipment according to claim 2 ,
When the telephone master unit control unit receives the telephone call detection signal from the telephone call detection circuit unit, the telephone master unit control unit performs a telephone call and displays a call to the maintenance telephone cordless handset on the screen, and detects off-hook of the telephone master unit. A fire alarm system characterized by connecting said telephone main unit to said telephone line.
a transmission line to which a terminal device including a fire detector with a unique address is connected, which is led out from the receiver to the security area;
an emergency telephone line drawn from the receiver to the restricted area and connecting an emergency telephone main unit provided in the receiver and an emergency telephone handset installed in the restricted area;
a maintenance telephone line drawn out from the receiver to the security zone and connecting a maintenance telephone base station provided in the receiver and a maintenance telephone slave station installed in the security zone;
In a fire alarm system equipped with
a telephone master unit control unit provided in the receiver for controlling call connection between the emergency telephone master unit and the emergency telephone cordless handset;
a telephone repeater that is connected to the transmission line and the emergency telephone line, has a unique address set therein, and controls call connection of the emergency telephone cordless handset;
is provided, and the telephone base unit control unit and the telephone repeater transmit and receive a predetermined call control signal through the transmission line to control the call connection of the telephone base unit and the emergency telephone cordless handset to the emergency telephone line. and furthermore,
a telephone jack connected to the maintenance telephone line;
a maintenance telephone cordless handset detachably connected to the telephone jack;
is provided,
When the maintenance telephone cordless handset is connected to the telephone jack, the telephone master unit control unit connects the telephone master unit to the maintenance telephone line to connect the maintenance telephone cordless handset to the maintenance telephone cordless handset. Fire alarm equipment.
5. The fire alarm system according to claim 4 , wherein the telephone main unit control unit controls calls by transmission of the emergency telephone cordless handset and the maintenance telephone cordless handset, respectively, and 1. A fire alarm system characterized by selecting at least one of the calls when calls from both telephone cordless handsets overlap and controlling the call.

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