JPH01852A - Alarm system using telephone equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an alarm system using a telephone device.

(Prior Art) Conventionally, an alarm circuit using a button telephone device has been proposed as described in Japanese Patent Publication No. 60-20957.

This alarm circuit is used in a button telephone device equipped with a central office line and an extension line so as to branch-connect handsets. It has an element that exhibits low impedance to signals. As a result, when the output of the alarm sensor is on and the element exhibiting low impedance is connected to the extension line, the alarm circuit responds to the drop in the level of the high-frequency signal to the extension line of each slave unit. The speaker circuit connected to the telephone line is activated to generate an alarm.

(Problems to be Solved by the Invention) However, in order to realize an alarm system using the above-mentioned conventional telephone device, it is necessary to (1) make sure that the handset is equipped with an extension call line in addition to the central telephone line; It is necessary to meet special equipment conditions, such as the main device being equipped with a speaker circuit, and the main device being equipped with a high-frequency signal generator, voltage monitoring circuit, etc.

An object of the present invention is to transmit an alarm from an alarm sensor to a telephone handset using a general telephone handset having only two communication lines with a simple equipment configuration.

(Means for Solving the Problems) In order to achieve the above object, an alarm system using a telephone device according to the present invention includes a main telephone circuit connected to a central office line, and two telephone lines connected to the main telephone circuit. A telephone device that is connected to a central office line and has a telephone handset whose main telephone circuit performs call operations to and from a central office line, and a control circuit which controls execution of the telephone handset's call operations by the main telephone circuit. The main telephone circuit is equipped with a ringing signal oscillation circuit section for a telephone handset, the control circuit is equipped with an alarm sensor transfer input section, and when the output of the alarm sensor is on, the alarm system generates the ringing signal. The present invention is characterized in that an oscillation circuit section is connected to the telephone line to cause the telephone handset to ring.

Further, in the alarm system using the telephone device of the present invention, the main telephone circuit includes an alarm sound generator as well as a ringing signal oscillation circuit, and when the alarm sensor is on, the receiver of the telephone handset is off-hook. It may also be characterized in that an alarm sound generator is connected to the telephone line below to transmit an alarm sound specific to the cause of the alarm to the telephone handset.

(Function) The alarm system using the telephone device of the present invention is as follows: ■ It is sufficient for the telephone handset to have only two communication lines, and ■ A ringing means (ringer circuit) in which the telephone handset operates based on a ringing signal. This means that there is no need to provide a separate speaker circuit, and the alarm from the alarm sensor can be transmitted by using a general telephone handset that is equipped with only a means for connecting the calling signal oscillator of the talking circuit to the talking line. Can be sent to a telephone handset.

Furthermore, ■ it additionally includes means for simply connecting the alarm tone generator of the main telephone circuit to the telephone line, - using a fishing telephone handset;
By taking the telephone handset that is in the alarm ringing state off-hook, the cause of the alarm can be determined and known.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram showing a telephone device according to an embodiment of the present invention, and FIGS. 2 to 11 are flowcharts corresponding to various operating modes of the same telephone device.

The telephone device 10 includes a main device 11, a plurality of telephone handsets 12 (in this embodiment, five telephone handsets 112 to 512), and a plurality of telephone handsets 12 (in this embodiment, five telephone handsets 112 to 512), three door phones 113 to third door phone 313), and a plurality of (in this embodiment, a fire sensor 14A, a gas leak sensor 14B1, a bath water level sensor 14C, and a preliminary sensor 14).
D) Alarm sensor 14.

The main device 11 has a main telephone circuit 15, a control circuit 16, and a power supply circuit 17.

The main telephone circuit 15 is connected to the central office side by central office lines 18A and 18B, and is also connected to each telephone handset 12 by two telephone lines 19A and 19B, and to each door phone 13 by two telephone lines respectively. Connected by 2OA and 20B.

The main telephone circuit includes a ring signal loop detector 21, a DTMF oscillator 22, an interrupt signal oscillator 23, and a hold melody generator (
melody IC) 24, alarm melody generator (alarm sound generator) 25, capacitor C1, resistor R1, relay rli,
r12, transformer t1, and capacitor C2.

In addition, the main telephone circuit 15 connects each telephone handset 12 (112 to 51
2), the calling signal oscillator 26
(126-526), off-footer detector 27 (12
7 to 527), extension loop detector 28 (128 to 528
L PB receiver 29, capacitor CI3 to C53, C
14~C54, relay r13~r53, relay r14~
r54, battery b11-b51, transformer t12-1
It is equipped with 52.

In addition, the main telephone circuit 15 connects each door phone 13 (113 to 31
3), door phone PB press detector 30 (130-330), relays ro1-r03
It is equipped with

The main telephone circuit 15 also includes a crosspoint circuit (switching circuit) 31 consisting of a crosspoint IC. The cross point circuit 31 has eight horizontal lines "0" to "7" and four vertical lines "'A" to "D11" arranged orthogonally to each other. II OII line is a doorphone exchange circuit,
The "0" line is connected to each door phone 1 via a bidirectional amplifier circuit 32.
3 relays ro1 to r03 are connected. “1”～“
5′” line is each telephone handset communication circuit, and “′1°゛~”
Each transformer t1 corresponding to each telephone cordless handset 12 is connected to the 5'° line.
Terminals 2 to t52 on the side opposite to the telephone handset are connected. The 6° line is a hold circuit, and the hold melody generator 24 is connected to the '6' line. The “7” line is the alarm circuit, °
An alarm melody generator 25 is connected to the '7''' line.

The 'A°' line is the office line circuit, to which the terminal on the opposite line side of the transformer t1 is connected. The B II line is the extension line circuit. The C"° line is a hold circuit. The "D" line is an interrupt circuit, and the interrupt signal oscillator 23 is connected to the "D" line. Cross points of horizontal lines and each vertical line (Δ in Figure 1)
) is turned on/off, and each telephone handset 12 is connected to the central office line, extension line, doorbell, hold, and interrupt circuits by switching. It should be noted that the cross point (C, 6) indicated by a circle in FIG. 1 is always on.

The control circuit 16 includes a ring signal loop detector 21 of the main telephone circuit 15, an off-footer detector 27 (127-527), an extension loop detector 28 (128-528), a PB receiver 29, and an intercom PB press detector 30 (130). ~330
), and receive each transmission signal from the crosspoint circuit 31. The control circuit 16 controls the cross point circuit 31, the DTMF oscillator 22, and each door phone 1 based on the above-described transmission signals.
3, the interrupt signal oscillator 23, the hold melody generator 24, the alarm melody generator 25, the call signal oscillator 26, etc.

Each telephone element m12 (112 to 512) has a telephone circuit 34 and a power supply circuit 35. The telephone circuit 34 consists of a dial circuit section, a telephone call circuit section, and a ringer circuit section.

Note that the first telephone handset 112 of each telephone handset 12 includes an alarm circuit 36 in addition to a telephone circuit 34 and a power supply circuit 35. The alarm circuit 36 includes an alarm input unit 37 to which each alarm sensor 14 is connected, an alarm control unit 38, a transfer output unit 39 that transfers the detection results of each alarm sensor 14 to the transfer input unit 33 of the control circuit 16, In addition to being equipped with an alarm sound generation IC 40,
Fire lamp 42A activated by alarm sound generation rc40
, a gas leak lamp 42B, a bath water level lamp 42C, and a spare lamp 42D.

Below, various operating modes of the telephone device 10 will be explained.

(Outside call...see Figure 2) When attempting to make an outside call using any telephone handset 12, for example, the fifth telephone handset 512, if the handset of the fifth telephone handset 512 is off-hook, the fifth telephone handset 512 Extension loop detector 28 corresponding to machine 512 sends this on-hook information to control circuit 16.

The control circuit 16 turns on the cross point (A, 5) of the cross point circuit 31 and sets the relay rll toward the transformer L1, thereby forming an outside line transmission mode.

Next, when the fifth telephone handset 512 dials the destination telephone number, the extension loop detector 528 corresponding to the fifth telephone handset m512 (when the dial information is a dial pulse signal)
, or the PB receiver 29 (when the dial information is a button signal) transmits this dial information to the control circuit 16.
Send to.

■When sending a dial pulse signal to the office line, the control circuit 16 turns on/off relay rll to send the dial pulse signal to the office line 18A,
Transmit dial pulse to 18B. At this time, relay r
12 to prevent pulse noise from being transmitted to the telephone handset 12 side during dialing.

When sending a button signal to the 0 station line, the control circuit 16 transmits this dial information to the DTMF oscillator 22, and the DTMF oscillator 22 transmits a tone signal to the station lines 18A and 18B.

When the ringing signal loop detector 21 detects a central office line reversal based on the off-footer of the telephone handset of the other party, this detection information is sent to the control circuit 16, and an outside line communication state is established.

(Incoming external line...see Figure 3) When a calling signal arrives from the office on the office lines 18A, 18B,
The ring signal loop detector 21 detects the arrival of an outside line, and this detection information is sent to the control circuit 16.

In this embodiment, the control circuit 16 connects relays r13 . r23 is switched to the ringing signal oscillator 26, relays r14 and r24 are switched to the off-hook detectors 127, 227, and the first telephone handset 112 and the second telephone handset 212 are made to ring.

The control circuit 16 includes a first telephone handset 112 and a second telephone handset 21.
2, each off-footer detector 127
, 227 sends on-hook/off-footer information of the telephone handsets 112 and 212 to the control circuit 16.

■First telephone number 4i1112 or second telephone number m212
If r13. responds within 5 rings, control circuit 16 activates relay r13. r23 and relay r14゜r24 are restored, and ■ If the first telephone handset 112 or the second telephone handset 212 does not respond within five rings, the control circuit 16 switches the other third telephone handsets 312 to 5 Switch the relays r33 to r53 corresponding to the telephone handset 512 to the ringing signal oscillator 26, switch the relays r34 to r54 to the off-footer detector 27 to ring the other telephone handsets 312 to 512, and ring any telephone handset. When the machines 312 to 512 respond (detected by on-hook/off-hook information of each off-footer detector 27), relays r33 to r53 and relays r34 to r54 are restored.

Next, the control circuit 16 switches the relay rll to the transformer t1, and for example, if the second telephone handset 212 is off-hook and in the responding state, it turns on the cross point (A, 2) of the cross point circuit 31 and connects the outside line. Establish call state.

(Extension call...see Figure 4) For example, when attempting to make an extension call from the 5th telephone handset 512, if the handset of the 5th telephone handset 512 is off-hook, the extension line corresponding to the 5th telephone handset 512 is looped. Detector 528 sends this off-hook information to control circuit 16. The control circuit 16 connects the cross points (A,
5) is turned on and the relay rll is pushed toward the transformer t1 to establish an outside line transmission mode.

Next, when the fifth telephone handset 512 dials 0'',
The extension loop detector 528 of the fifth telephone handset 512 sends this dial information to the control circuit 16. After that, if there is no dial information within a preset 3 seconds, the control circuit 1
6 moves the relay rll toward the capacitor c1 and turns on/off the cross point (D, 5) of the cross point circuit 31.
It is turned off to send an extension dialing tone to the fifth telephone handset 512, and the cross point (A, 5) is turned off to form an extension dialing mode.

Next, when the fifth telephone handset 512 dials the destination number 2 (1 to 5), the extension loop detector 528 of the fifth telephone handset 512 sends this dial information to the control circuit 16. The control circuit 16 uses the extension loop detector ff12B of the called telephone handset ff112 to detect the called telephone handset 11.
2. Obtain on-hook/off-hook information.

■If the called telephone handset 212 is in the on-hook state, the control circuit 16 transmits a relay r corresponding to the called telephone handset AI2.
Switch f3 to call signal oscillator ff126, relay r1
4 to the off-footer detector f27, rings the destination telephone handset j212, turns on/off the cross point (D, 5) of the cross point circuit 31, and switches the fifth telephone handset a
512 to send a ring tone, ■If the called telephone handset m212 is in an off-hook state, the control wholesale circuit 16 turns on/off the cross point (D, 5) of the cross point circuit 31 to send a ring tone to the fifth telephone handset 512. It is possible to send a busy tone to the terminal, dial another destination number using the fifth telephone handset 512, and repeat step (2).

■After executing step ■, the control circuit 16 obtains the on-hook/off-hook information of the off-hook detector 227, and selects the destination telephone handset! 12 goes off-hook, the relay rf3°r14 of the called destination telephone handset 212 is restored; for example, when the first telephone handset 112 responds, the crosspoint (D, 5) of the crosspoint circuit 31 is turned off. , turn on the cross points (B, 1) and (B, 5), establish an extension call state between the first telephone handset 112 and the fifth telephone handset m512, ■Destination telephone handset! 12 does not go off-hook and does not respond, the fifth telephone handset 512 dials another called number and returns to step (2) to call another telephone handset.

(Door phone call...see FIG. 5) When attempting to make a door phone call using any door phone 13, for example, the first door phone 113, the door phone PB press detector 130 transmits push button press information of the first door phone 113 to the control circuit 16. Send to.

The control circuit 16 switches the relays r13 to r53 corresponding to all the telephone handsets 112 to 512 to the ringing signal oscillator 26,
And relays r14 to r54 are connected to off-hook detectors 127 to
527, and all the telephone handsets 112 to 512 are called and ringed at the same time. The control circuit 16 includes all telephone handsets 112.
-512 off-footer detectors 127-527 obtain on-hook/off-footer information, and monitor whether there is a response within three rings.

■If the control circuit 16 receives a response within the above three beeps,
Relays r13 to r corresponding to all telephone handsets 112 to 512
53 and relays r14 to r54, and relay r
o1 and, for example, when the second telephone handset 212 responds by going off-hook, the cross point circuit 31
Turn on crosspoints (B, 0) and (B, 2) to establish a doorphone call.

■If there is no response within the above three rings, the control circuit 16 will send relays r13 to 3 corresponding to all telephone handsets 112 to 512
r53 and relays r14 to r54 to stop ringing, (1) within a few seconds, any telephone handset 12
If the telephone handset 12 responds, the door intercom call state is established in the same manner as in the above (2), and (2) if there is no response from any telephone handset 12 within a few seconds thereafter, the call from the first door intercom 113 is canceled and the call state is set to standby. shall be.

(External line interruption during an internal call...see Figure 6) Any telephone handset, such as the first telephone handset 112 and the second telephone handset 212
During an extension call, a call signal from the office is sent to the office line 18A, 18.
When the call arrives at B, the calling signal loop detector 21 detects the arrival of the outside line, and this detection information is sent to the control circuit 16.

The control circuit 16 turns on/off the cross points (D, 1) and (D, 2) of the cross point circuit 31, thereby controlling the first telephone handset 112' and the second telephone handset 212 during a call.
The interrupt signal oscillator 23 (for example, a 400Hz oscillation circuit) sends out an interrupt signal (for example, 4007 to 161 (intermittent interrupt signal tone modulated to z)). 112.212 on-hook/off-footer information to the extension loop detector 12 corresponding to those telephone handsets.
Detected from 8°228.

(a) If the above-mentioned telephone handset 112, 212 during a call is not turned on-hook within a few seconds, the following ① to ③ will apply.

■The control circuit 16 switches the relay r13 of all the telephone handsets 12 (excluding the telephone handset 212 that is in the middle of a call) or the telephone handsets 212 with a predetermined high priority to the ringing signal oscillator 226, and relay 1
4 to the off-footer detector 227 and the telephone handset 21
Sound 2.

■When the off-footer detector ff127 detects that the ringing telephone handset 212 described in ■ above goes off-hook, the control circuit 1
6 restores relays r13 and r14, and the telephone handset 212
to stop the sound.

■ The control circuit 16 is configured such that, for example, the second telephone handset 212 is
If you respond by going off-hook at the cross point (A) of the cross point circuit 31.

2) is turned on and relay rll is moved toward transformer t1 to establish an outside line call state.

(b) If the above-mentioned talking machine 112, 212 goes on-hook within a few seconds, the following (1) to (2) apply.

(2) When the first telephone handset 112 goes on-hook, the extension loop detector 128 sends this off-hook information to the control circuit 16.

(2) The control circuit 16 turns off the cross points (8, 1) and (B, 2) of the cross point circuit 31.

■The control circuit 16 switches the relay r13 corresponding to the first telephone handset 112 to the ringing signal oscillator 126, and the relay 14
is switched to the off-footer detector 127, and the first telephone handset 1
Ring 12.

■When the first telephone handset 112 is off-hook, the off-hook detector 127 transfers this off-footer information to the control circuit 1.
Send on 6.

■The control circuit 16 includes a relay r13.corresponding to the first telephone handset 112. r14 is restored, and the ringing of the first telephone handset 112 is stopped.

■The control circuit 16 turns on the cross point (A, 1) of the cross point circuit 31, and switches the relay r11 to the transformer t.
By tilting it toward 1, an outside line call status is established.

(Interrupting the doorbell during an outside line call...see Figure 7) When the push button of the first doorphone 13 is pressed during an outside line call on any telephone handset, for example, the first telephone handset 112, the first doorphone The door phone PB press detector 30 corresponding to 13 sends this detection information to the control circuit 16. The control circuit 16 turns on/off the cross point (D, 1) of the cross point circuit 31, and sends an interrupt signal from the interrupt signal oscillator 23 to the first telephone 6112 during a call.

Next, when the first telephone handset 112 dials "'0", the extension loop detector 128 sends this dial information to the control circuit 16, and the control circuit 16 detects the cross point (A, 6) is turned on to send a hold melody to the central office line, and the cross point (A, 1) is turned off (external line hold).

The control circuit 16 is a relay r23 that corresponds to all telephone cordless handsets 12.
~53 to the calling signal oscillator 26, relay r24
-54 is switched to the off-footer detector 27, and - general paging is performed. At this time, the control circuit 16 controls the cross point (D, 1
) to give an extension oscillation sound, and when the first telephone handset 112 goes off-hook, the extension loop detector 128 corresponding to the first telephone handset 112 sends this on-hook information to the control circuit 16. .

The control circuit 16 includes a relay r corresponding to the first telephone handset 112.
13 to the calling signal oscillator 126, relay r14
is switched to the off-hook detector 127, and the first telephone handset 1
Ring 12. The control circuit 16 obtains on-hook/off-footer information from the off-footer detectors 27 corresponding to all telephone handsets 12, and monitors whether there is a response within three rings.

■If the control circuit 16 receives a response within the above three beeps,
While restoring relays r13 to 53 and relays r14 to 54 corresponding to all telephone handsets 12 and turning on relay ro1, for example, when the second telephone handset 212 responds by going off-hook, the cross of the cross point circuit 31 is turned on. Turn on points (B, O) and (B, 2) to establish a doorbell call state. Next, when the second telephone handset 212 goes off-hook and the extension loop detector 228 sends this on-footer information to the control circuit 16, the control circuit 16 sends a ringing signal to the relays r13 to r53 corresponding to all the telephone handsets 12. Oscillator 2
6, relays r14 to r54 are switched to the off-hook detector 27, and all telephone slave units 12 are made to ring.

The control circuit 16 controls any telephone handset, for example, the second telephone handset 2.
Off-footer detector 227 indicates that 12 is off-hook.
When detected by , relays r13 to 53 and relay r
14 to 54, and cross point circuit 3.
1 cross point (A, 6) is turned off to release the outside line hold, and the cross point (A, 6) of cross point circuit 31 is turned off.
Turn on 2) to restore the outside line call status.

■ If there is no response within the above three rings, the control circuit 16 restores relays r13 to 53 and relays r1.4 to 54 corresponding to all telephone handsets 12 and stops ringing, (1) If any telephone handset 12 responds within those few seconds, a door intercom call state is established in the same way as in (2) above; (2) If there is no response from any telephone handset ff112 within those few seconds, standby. state.

Next, in the standby state, when any telephone handset 12, for example, the second telephone handset 212, goes off-hook and dials ``0'', the control circuit 16 selects the crosspoint (A, 6) of the crosspoint circuit 31. Turn off to restore outside line hold and cross point (A.

2) to restore the outside line call status.

(Interrupting the doorbell during an extension call...see Figure 8) When any telephone handset 12 is in the middle of an extension call between the first telephone handset 1l12 and the second telephone handset m212, the push button of the first doorphone 113 is pressed. Then, the door phone PB press detector 130 corresponding to the first door phone 113 transmits this detection information to the control circuit 1.
Send on 6.

Cross point (D) of cross point circuit 31.

By turning on/off 1), (D, 2), an interrupt signal from the interrupt signal oscillator 23 is sent to the first telephone handset 112 and the second telephone handset [212] during a call.

The control circuit 16 detects the off-hook/off-hook information during the call [12] from the extension loop detectors 28 corresponding to those telephone handsets 12.

Next, the first telephone handset 112 or the second telephone handset 2
12 goes on-hook, extension loop detector 128 or 228 sends this on-hook information to control circuit 16. The control circuit 16 switches the relays r13-53 corresponding to all on-hook telephone handsets 12 to the ringing signal detector 26, switches the relays r14-54 to the off-footer detector 27, and performs a general ringing.

At this time, the control circuit 16 causes the on-footer telephone handset 12 to ring, and the off-hook telephone handset! 12, the cross point I-(D,
The off-hook telephone 1ffil2 is turned on/off to give a busy tone, and is made to ring when the off-hook telephone 1ffil2 goes off-hook.

The control circuit 16 is a completely off-hook telephone handset! Off footer detector compatible with 12! On-hook/off-footer information from 27 is obtained, and it is monitored whether there is a response within three rings.

■The control circuit 16 responds within the above three beeps, for example, the second
If telephone handset 212 goes off-hook, all telephone handsets 1
Relays r13-53 and relays r14-5 corresponding to 2
4 is restored, relay ro1 is turned on, and the cross points (B, O), (B,
Turn on 2) and establish a doorbell call status.

■If there is no response within the above three rings, the control circuit 16 will send relays r13 to
53 and relays r14 to 54 and stop ringing, (1) If any telephone cordless handset 12 responds within a few seconds, a doorbell call state is established in the same manner as in (2) above.
If there is no response from any telephone handset 12 within those few seconds, the system is placed in a standby state.

(Doorphone monitor...see FIG. 9) When calling the doorphone 13 from any telephone handset 12, for example, the fifth telephone handset 512, or trying to collect sounds around the doorphone 13, the fifth telephone handset 512 When the telephone handset 512 goes off-hook, the extension loop detector 528 corresponding to the fifth telephone handset 512 sends this on-hook information to the control circuit 16.

The control circuit 16 turns on the cross point (A, 5) of the cross point circuit 31 and sets the relay rll toward the transformer t1, thereby establishing an outside line transmission mode.

Subsequently, when the fifth telephone handset 512 dials "0"', the extension loop detector 528 corresponding to the fifth telephone handset 512 is activated.
sends this dial information to the control circuit 16. After that, if there is no dial information for 3 seconds, the control circuit 16 switches the relay rll toward the capacitor C1, turns on/off the cross point (D, 5) of the cross point circuit 31, and turns on/off the cross point (A, 5) of the cross point circuit 31. ) to form an extension call mode.

Next, when the fifth telephone handset 512 dials "7", the extension loop detector 528 corresponding to the fifth telephone handset 512 sends this dial information to the control circuit 16.
6 is the cross point (D, 5
) and set the doorbell call mode (silent).

Next, when the fifth telephone handset 512 dials one of "1" to "3", the control circuit 16 turns on the corresponding relays r01 to r03 and controls the crosspoint of the crosspoint circuit 31. For example, °゛2°
゛2°゛ Turn on the dial relay r02, turn on the cross points (B, O), (B, 5) of the cross point circuit 31, and establish a door phone call state (door phone 21
3. Monitor surrounding sounds).

(Hold transfer...see FIG. 10) When any telephone handset 12, for example, the fifth telephone handset 512, is in an outside line call, internal call, or doorbell call state,
When the fifth telephone handset 512 dials '0,' the extension loop detector 528 corresponding to the fifth telephone handset 512 sends this dial information to the control circuit 16, and the control circuit 16 suspends the crosspoint circuit 31. Turn on any of the corresponding cross points (A, 6), (C, O) to (C, 5) on the circuit corresponding to the other party, and send the hold melody generator 24 to the other party on hold. At the same time, the crosspoint (A, 5) or (B) that was in the on state of the crosspoint circuit 31.

5), the control circuit 16 turns on/off (D, 5) of the cross point circuit 31 to switch off the fifth telephone handset 5.
The extension dial tone is sent to 12.

Next, the fifth telephone handset 512 is the forwarding destination number! When (1 to 5) are dialed, for example, when "1" is dialed, the cross points (B, 1) and (B, 5) of the cross point circuit 31 are
) is turned on, and an extension call state is established with the first telephone a112.

After that, when the extension loop detector 528 corresponding to the fifth telephone handset 512 sends the on-hook information of the fifth telephone handset 512 to the control circuit 16, the control circuit 16 transmits the above-mentioned information on the hold circuit of the crosspoint circuit 31. The cross point (A) between the hold partner and the hold melody generator 24, which were in the ON state, as shown in FIG.

6), (C, O) to (C, 5) are turned off, and the cross point (
A, 1) or (B, 1) and (B.

0), (B, 2) to (B, 5), and then either an external call after transfer (turn on (A, 1)) or an internal call [(B, 1) and (B, 2) to ( B, 5) on] or call the doorbell ((
B, 1) and (B, 0) on] state.

Note that the hold state of an outside line call, internal call, or doorphone call obtained by dialing "0" on the fifth telephone handset 512 can be put on hold by dialing "0°" again on the fifth telephone handset 512 before transfer. The hold will be released.

(Alarm...see FIG. 11) When the contact of any alarm sensor 14, for example, the fire sensor 14A, is turned on, this on signal is sent from the alarm input section 37 provided in the alarm circuit 36 of the first telephone handset 112. The information is transmitted to the alarm control section 38.

The alarm control unit 38 blinks the fire lamp 42A and sends out the fire alarm sound generated by the alarm sound generation IC 40 from the alarm speaker 41. At this time, alarm sound generation IC40
generates an alarm tone specific to each alarm cause. For example, in the case of a fire, the phrase ``Beep-bo-bee-bo'' is repeated, and in the case of a gas leak, the phrase ``Bip-pi-pi-pi'' is repeated.

Further, the alarm circuit 36 of the first telephone handset 112 transmits the ON signal of the alarm sensor 14 from the transfer output section 39 to the control circuit 16 via the transfer input section 33. Control circuit 1
For example, when the ON signal of the fire sensor 14A is transmitted, 6 switches the relays r13 to 53 corresponding to all telephone handsets 12 to the ringing signal detector 26, switches the relays r14 to 54 to the off-hook detector 27, and The telephone handsets 12 are made to ring all at once, and the abnormal state of the alarm occurrence is communicated to all the telephone handset 12 installation locations.

At this time, the calling signal sent out by each calling signal oscillator 26 is
For example, the ringing signal for an outside line call is "sent for 1 second.

Repeated 2-second pause", the ringing signal for an extension call is "0.2"
If the calling signal for a door intercom call is "sending for 1 second, repeating a pause of 0.5 seconds", the alarm call signal is distinguished from other ring signals by "sending for 3 seconds". , a 1-second pause, then repeat.

When any telephone handset 12 goes off-hook in response to the ringing caused by the alarm call, the control circuit 16 obtains this off-footer information from the off-footer detector 27 and detects the cross point (B,
1) is turned on, and at the same time, the cross point CB and 7) are turned on to connect the off-hook telephone handset n12 and the alarm melody generator 25.

The alarm melody generator 25 is the above-mentioned alarm sound generator rc40.
Similarly, a unique alarm tone is generated depending on the cause of the alarm. For example, when talking about a fire, the phrase "pi-bo-pi-po" is repeated, and when there is a gas leak, the phrase "bi-pi-pi-pi-pi" is repeated.

As a result, an alarm sound unique to the cause of the alarm is sent to each telephone handset 12, and the cause of the alarm can be accurately notified even to a remote location from the alarm receiver 14.

Incidentally, the main device 11 may be equipped with an alarm speaker that emits the alarm sound of the alarm melody generator 25.

In addition, when the ON signals of the plurality of alarm sensors 14 are emitted at the same time, the control circuit 16 starts reporting the alarm sound corresponding to the alarm sensor 14 having a high priority specified in advance.

Next, the operation of the above embodiment will be explained.

The alarm system according to the embodiment described above is as follows: (1) It is sufficient that each telephone handset 12 is provided with only two communication lines 19A and 19B, and (2) each telephone handset 12 operates based on a calling signal. Since the ringing means (ringer circuit) is used as the alarm sounding means, there is no need to provide a separate speaker circuit. The oscillator 26 is simply connected to the communication lines 19A and 19B, and the alarm melody generator 25 of the main telephone circuit 15 is activated in response to the off-hook of each telephone handset 12.
It is configured by simply connecting the communication lines 19A and 19B to the communication lines 19A and 19B.

Therefore, with a simple equipment configuration, two communication lines 19A,
An alarm from the alarm sensor 14 can be transmitted to the telephone handset 12 using a general telephone handset 12 having only 19B.

According to the above embodiment, by going off-hook the telephone handset 12 in the alarm sounding state, it is possible to listen to an alarm sound specific to the cause of the alarm, and to accurately determine and know the cause of the alarm.

〔Effect of the invention〕

As described above, according to the present invention, an alarm from an alarm sensor can be transmitted to a telephone handset with a simple equipment configuration using a general telephone handset equipped with only two communication lines.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a telephone device according to an embodiment of the present invention, FIG. 2 is a flowchart corresponding to the outside line calling mode, FIG. 3 is a flowchart corresponding to the outside line receiving mode, and FIG. 4 is an internal line calling mode. 5 is a flowchart corresponding to the doorphone call mode, FIG. 6 is a flowchart corresponding to the outside line interruption mode during an internal call, and FIG. 7 is a flowchart corresponding to the doorbell interruption mode during an outside line call. , Fig. 8 is a flowchart corresponding to the doorbell interruption mode during an extension call, Fig. 9 is a flowchart corresponding to the doorphone monitor mode, Fig. 10 is a flowchart corresponding to the hold transfer mode, and Fig. 11 is a flowchart corresponding to the alarm mode. This is a flowchart. 10; Telephone device, 11; Main device, 12 (112-512
); Telephone handset, 13 (113-313) i-door phone,
14 (14A to 14D); Alarm sensor. 15; Main telephone circuit, 16: Control circuit, 17; Power supply circuit,
18A, 18B, central line, 19A, 19B. 2OA, 20B; telephone line, 21; ringing signal loop detector, 22; DTMF oscillator, 23; interrupt signal oscillator, 24
; Hold melody generator, 25; Alarm melody generator (alarm sound generator), 26 (126-526); Call signal oscillator, 27 (1, 27-527); Off-funk detector,
28 (128-528); Extension loop detector, 29;
PB receiver. 30 (130-330); Door phone PB press detector,
31; cross point circuit; 32; amplifier circuit. 33; transfer input unit; 34; telephone circuit; 35; power supply circuit.

Claims (2)

[Claims] (1) The main telephone circuit connected to the office line, and the main telephone circuit connected to the main telephone circuit.
It has a telephone handset that is connected via a main telephone line and whose main telephone circuit executes calls to and from the office line, and a control circuit that controls the main telephone circuit to perform calls to and from the telephone handset. The main telephone circuit is equipped with a ringing signal oscillation circuit section for a telephone cordless handset, the control circuit is equipped with an alarm sensor transfer input section, and the alarm system has a telephone device in which the output of the alarm sensor is turned on. An alarm system using a telephone device, characterized in that at a certain time, the calling signal oscillation circuit unit is connected to the telephone line to cause a telephone handset to ring. (2) The main telephone circuit is equipped with an alarm sound generator together with a ringing signal oscillation circuit, and when the alarm sensor is on, the alarm sound generator is connected to the telephone line when the handset of the telephone handset is off-hook. 2. The alarm system using a telephone device according to claim 1, wherein an alarm sound specific to the cause of the alarm is transmitted to the telephone handset.