JPH0444455A - Telephone system - Google Patents

Abstract

PURPOSE:To realize a small sized and simple telephone system by providing four functions of telephone function, interphone function, audio function and extension speech function to the system. CONSTITUTION:The system is provided with a master set 11 connected to a telephone line and a hand-free telephone set 12 connected to the master set 11 and constituted to be connected to a 2-wire telephone slave set 13 available on the market, an interphone 14 and an audio equipment 15 in addition to the hand-free telephone set 12. A ringer circuit 16 comprising a ringer IC 19 and a rectifier 18 in the master set 11 is in branch connection to a speech line connected to a telephone line and the master set 11 is provided with a control changeover circuit 17 provided with relays l1, l2 and photocouplers 21, 22 to connect the hand-free telephone set 12 and the telephone slave set 13 to the speech line.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone system having multiple functions.

(Prior Art) Conventionally, an intercom device with a radio has been proposed, for example, as disclosed in Japanese Utility Model Application Publication No. 62-3152.

This radio-equipped intercom device has a plurality of intercoms connected through a single signal transmission path, and a radio signal is sent to one of the intercoms via the signal transmission path.

[Problem to be solved by the invention]

However, conventional systems such as the one described above have a problem in that there are few selectable functions and it is not possible to achieve miniaturization. That is, it is simply a combination of an intercom device and a radio device and does not have a telephone function, and since the radio device is built-in, a tuner circuit is required and the device becomes large.

The present invention was made with attention to such problems, and has multiple functions in addition to telephone functions and audio functions.
The purpose is to provide a small and simple telephone system.

[Means to solve the problem]

The telephone system of the present invention includes a main device connected to a telephone line and a hands-free telephone connected to the main device, wherein the main device has a telephone handset connection circuit and a handsfree telephone connected to the main device. The hands-free telephone is equipped with a switch for connecting the hands-free telephone with a communication circuit of the hands-free telephone, an intercom connection circuit, and an audio device input circuit, and the hands-free telephone is connected to the telephone cordless handset and the intercom via the main device. It is equipped with a hands-free communication circuit and an audio output circuit that sends out the output of the audio equipment via the main device.

Further, in the telephone system of the present invention, the main device described above is provided with a volume changeover switch for changing the ringing volume between the hands-free telephone and the telephone handset.

[Effect]

In the telephone system of the present invention, the following functions are realized.

(A) Telephone function When an incoming signal arrives at the main device through the telephone line, it can be answered by a band-free telephone or a telephone handset connected to the main device.

At this time, if the hands-free telephone or telephone handset has a dial oscillation function, it is also possible to make an outside call via the main device.

(B) Intercom function When the intercom call start information from the intercom connected to the main device is transferred to the main device, the interphone call is started between the hands-free telephone or telephone handset connected to the main device and the intercom. You can make calls.

(C) Audio function By connecting an audio device to the audio device input circuit of the main device and activating the audio output circuit of the hands-free telephone, the output of the audio device can be transmitted through the hands-free telephone.

(D) Extension call function When the extension start information is transferred from the hands-free telephone to the main device, a voice signal is transmitted from the main device to the telephone handset, and an extension call is made between the hands-free telephone and the telephone handset. be able to.

Furthermore, by pressing the telephone circuit connection switch on the main device, extension calls can be made between the existing telephone handset and the hands-free telephone.

That is, according to the present invention, four functions, a telephone function, an intercom function, an audio function, and an extension call function, can be realized with a small and simple configuration without a tuner circuit.

〔Example〕

Figure 1 is a schematic diagram showing the configuration of a telephone system according to one embodiment of Hiroki's invention, Figure 2 is a configuration diagram showing details of the main device in Figure 1, and Figure 3 is a detailed diagram of the hands-free telephone shown in Figure 1. FIG.

As shown in FIG. 1, this telephone system 10 includes a main device 111 connected to a telephone line (external II), and a main device i
11 and a hands-free telephone 12 (a telephone that allows you to talk without using your hands). In addition to the hands-free telephone 12, the main device itt includes a commercially available two-wire T-talker A13. Intercom 14
and audio equipment (radio, television, CD player,
It is configured so that 15 tape recorders, etc.) can be connected.

The upper H8 main device 11 is constructed as shown in FIG.

That is, this main device 11 branches and connects a ringer circuit 16 having a rectifier 18 and a ringer IC 19 to a telephone line connected to a telephone line, and also connects the hands-free telephone 12 of FIG. 1 and a telephone to the telephone line. A control switching circuit 17 having a relay It1.12 and a photocoupler 21.22 for connecting the handset 13 is provided. And relay j!
1.12 is switched and controlled by the CPU 23, and is connected to the a contact during standby and for an outside line call, and is connected to the b contact during an intercom call and an extension call.

In addition, the photocouplers 21 and 22 are the hands-free telephone 1.
2. The incoming call state and response state of the telephone handset 13 are detected, and the detection results are transferred to the CPU 23.

Moreover, one device a111 includes an intercom connection circuit 24 for connecting an intercom 14 to the hands-free telephone 12 and the telephone handset 13.

This intercom connection circuit 24 includes a button press detection circuit 25 that detects button press information of the intercom 14, and the button press information is transferred to the CPU 23. The CPU 23 controls the switching of the relay 13, and connects the relay 13 to the a contact during standby and intercom communication, and connects the relay j23 to the b contact when sending ping pong sound to the intercom 14.

The main device 11 also includes an audio device input circuit 26 to which an audio device 15 such as a radio cassette player is connected. This audio equipment input circuit 26 is equipped with an input terminal 27, and the audio output (hereinafter referred to as BGM) of the audio equipment 15 is transmitted to the hands-free telephone 1 through an audio line.
2 is sent out. At that time, use the handsfree phone 12 to
If there is an incoming call from an outside line or the intercom 14 while listening to GM, the BGM mute function is activated to give priority to the call, and the BGM is restored as soon as the call ends.

The main device 11 also includes a melody sending circuit 28. This melody sending circuit 28 is equipped with a melody IC 29 driven by the CPU 23, and sends an extension ring tone and a call hold tone to the hands-free telephone 12 and the telephone handset 13 via the telephone line, and also sends an extension ring tone and a call hold tone to the hands-free telephone 12 and the telephone handset 13. A bing pong sound is sent to a hands-free telephone 12 via a voice line.

Furthermore, the unit 3111 is equipped with an amplifier circuit 30 and a speaker 31, and provides an extension ring tone and a ping tone for intercom calls.

80M monitor sound is sent from the speaker 31.

At this time, adjust the volume level of the BGM function using the LED l
! ! The LED 57 is blinked by the dynamic circuit 56 in a manner that helps prevent excessive human effort.

In addition, one GTT has an LED control circuit 32, an amplifier control circuit 33, and a button press reading circuit 34, which will be described later.
A power supply circuit 35 is provided to supply 12V and 5V DC to each part.

Further, the hands-free telephone 12 is constructed as shown in FIG.

That is, this hands-free telephone 12 has a rectifier 38 and a ringer I connected to a two-wire telephone handset 13 or an intercom 14 via the main device 11 described above.
While branching and connecting the ringer circuit 36 having C39,
A hands-free communication circuit 37 is connected to this communication line. This hands-free communication circuit 37 additionally includes a photo-receiving element of a photocoupler 40 in order to form a DC loop at the time of response.

Moreover, this hands-free telephone 12 also has a response switch (
SW) circuit 41. This response switch circuit 4
1 is a response switch 42° control IC 43, photocoupler 4
The structure has a light emitting element of 0 and a response display @44. With this configuration, the hands-free telephone 12 can:
After turning on the response switch 42 and turning on the photocoupler 40 to form a DC loop in the hands-free call circuit 37, it is possible to make a hands-free call using the microphone 45 and speaker 46.

Further, depending on the circuit constant of the response switch circuit 41, the call is terminated after a certain period of time has elapsed, which helps to supplement the invalidity.

Note that the speaker 46 is connected to the hands-free calling circuit 37 via an electronic volume circuit 47 and an amplifier circuit 48. Moreover, the hands-free telephone 12 is equipped with one device.
The audio output circuit 50 is equipped with an audio output circuit 50 capable of transmitting BGM of the audio device 15 via the audio line, and the audio output circuit 50 is connected to the audio device input circuit 26 of the main device 11 via the audio line. It is composed of a circuit 47, an amplifier circuit 48, and a speaker 46. Here, the hands-free telephone 12 is
An 80M switch 51 is provided, and button press information of the 80M switch 51 can be transferred from the button press reading circuit 34 of the unit W11 to the CPU 23 via an information line. Thereby, the CPU 23 drives the amplifier dedicated circuit 33 and turns on the power switching transistor of the amplifier circuit 48 via the amplifier control line, so that the BGM can be transmitted from the speaker 46 of the audio output circuit 50.

Furthermore, the hands-free telephone 12 has an extension call switch 5.
2 and a hold switch 53, the button press information of these switches 52 and 53 is transferred from the button press reading circuit 34 of the main device 11 to the CPU 23 via the information line, and the hands-free telephone 12 is placed in an extension call mode. , so that it can be set to hold mode.

In addition, the LED control circuit 32 included in one unit W11 is as follows:
Under the control of the CPU 23, the hands-free telephone 12 is configured to drive the built-in BGM transmission display 54 and extension call display 55 via the LED control line. As a result, the hands-free telephone 12 becomes 80
It can be displayed that it is in M sending mode or extension call mode.

In addition, the CPU 23 of the main device 11 described above also includes a telephone handset 1.
A bus call switch 60 for connecting the communication circuit of the hands-free telephone 12 and the main device 1 is connected between the existing telephone handset 13 and the hands-free telephone 12.
It is configured so that extension calls can be made via 1.

Further, the CPU 23 includes a volume changeover switch 61 for switching the ringing volume (bing-bong volume) between the main device 11, the hands-free telephone 12, and the telephone handset 13 into two levels, for example.
is connected, and the volume is conveniently configured to reduce the volume at night.

Next, each operation of the telephone function, intercom call function, audio function, and extension call function by the telephone system 10 having the above configuration will be explained.

(A) Telephone function I will explain everything from receiving a call to making a hands-free call.

■Incoming call signal (16H,.

75v) reaches the main device 11, the ringer IC 19 of the ringer circuit 16 of one unit 211 and the hands-free telephone 1
The linker IC 39 of the second ringer circuit 36 is driven and a ringer sound is sent out.

■When the ringing sound of ■ above is being sent, the response switch 42 of the response switch circuit 41 of the hands-free telephone 12
When is pressed, the light emitting element of the photocoupler 40 is turned on.

■The light-receiving element of the photocoupler 40 is turned on by Tokomi■,
The DC loop of the hands-free phone call circuit 37 is closed, and hands-free phone calls are started.

(2) At the end of a call, when the response switch 42 of the response switch circuit 41 is pressed, the light emitting element of the photocoupler 40 is turned off.

(2) As a result of the above (2), the light receiving element of the photocoupler 40 is turned off, the DC loop of the hands-free communication circuit 37 is opened, and the device enters a standby state.

Note that the telephone handset 13 can also respond to the ringing sound in (2) above.

Further, if the hands-free telephone 12 or the telephone handset 13 has a dialing function, it is also possible to make an outside call via the main device 11.

(B) Intercom function From receiving a call (sending a banging sound) to talking will be explained as a representative example.

(2) When button press information on the intercom 14 is detected by the button press detection circuit 25 of the intercom connection circuit 24, this button press information is transferred to the CPU 23.

■CPU23 is relay I11. At the same time as switching I12 to a b contact, relay J23 is switched to a b contact, and the melody IC 29 of the melody sending circuit 28 is driven. As a result, the ping pong sound is sent to the intercom 14 and is also sent from the speaker 31 of the main device 11. In addition, this ping-bong sound is transmitted to the hands-free phone 1 via the audio line.
It is also transmitted from the second speaker 46.

■When the telephone cordless handset 13 goes off-hook and responds to the beep sound of ■ above, the photocoupler 21 of the control switching circuit 17
turns on. Based on this turning on of the photocoupler 21, the CPU 23 switches the relay IL3 to the a contact, and an intercom call is started.

(2) When the telephone handset 13 goes on-hook at the end of a call, the photocoupler 21 of the control switching circuit 17 is turned off.

Based on this photocoupler 21 being turned off, the CPU 23 activates relay j21. Switch It2 to the a contact and enter the standby state.

Note that the hands-free telephone 12 can also respond to the above-mentioned ping-pong sound.

(C) Audio function ■Audio function 15 is audio device input circuit 260
It is connected to the input terminal 27.

■The 80M switch 51 of the main device 12 is pressed, and the button press information is sent to the button press reading circuit 34 of the clay rtll.
When the button press information is detected by the CPU 23
will be forwarded to.

(2) The CPU 23 drives the amplifier control circuit 33, turns on the power switching transistor of the amplifier circuit 48, and outputs BGM from the speaker 46 of the audio output circuit 50.

■When the 80M switch 51 of the hands-free telephone 12 is pressed down again, the CPU 23 detects this information in the same way as in the above (■) and sends the information to the amplifier circuit 4 via the amplifier control circuit 33.
The power supply switching transistor 8 is turned off, and the output of BGM from the speaker 46 is stopped.

In addition, after the above ■, the earthenware [audio equipment from speaker 31 of 11! ! 15 BGMs are continuously transmitted.

(D) Extension call function ■ When making an extension call from the hands-free telephone 12 to the main device 11, press down the switch 52 of the hands-free telephone 12 to transfer the extension call start information to the CPU 23 of the Dosei M11, and then An electronic sound is emitted from the 11 speakers 31. And relay! 1. Connect 12 to b contact,
When the response switch 42 of the hands-free telephone 12 is pressed down, the DC circuit (call circuit) is closed. At this time, when you speak into the microphone 45 of the hands-free telephone 12, the voice is selected from the speaker 31 of the main device 11, and by off-hooking the existing telephone handset 13, the telephone handset 13 and the hands-free telephone 12 are connected. You can make internal calls between them.

- When making an extension call from the main device 11 to the hands-free telephone 12, push down the bus call switch 60 of the clay M11 to transfer call start information to the CPU 23, and make the speaker 46 of the hands-free telephone 12 emit an electronic sound. Then, the existing telephone handset 13 is off-hook, and the main device
Connect the relay fi1゜12 to the b contact. In this state, by pressing down the response switch 42° of the hands-free telephone 12, an extension call can be made between the hands-free telephone 12 and the telephone handset 13.

In addition, the above all calls are made using the hands-free telephone 1.
2 to the main device 11, and from the main device 11 to the hands-free telephone 12, and it is also possible to hold and transfer calls in both directions.

That is, according to the above telephone system 10, the following (a)
It has the effect of ~(ch).

(b) The four functions of a telephone function, an intercom function, an audio function, and an extension call function can be realized in a small and simple configuration without a tuner circuit.

(b) The control switching circuit 17 for the telephone handset 13 is made of clay!
111, a commercially available telephone handset can be connected and used according to the user's preference.

(c) For example, a hang-free telephone 12 installed in the bathroom can be used to talk to an intercom 14 installed at the entrance.

(d) Audio equipment 15 made of earthenware! By connecting to the hands-free telephone 12 installed in the bathroom, for example, radio broadcasts from a hand-held radio cassette player or the like or sounds played from a tape recorder can be transmitted.

(e) By installing the above-mentioned hands-free telephone 12 in, for example, a kitchen, a toilet, etc., a comfortable kitchen and a comfortable toilet can be realized.

(f) An extension call can be made between the existing telephone handset 13 and the hands-free telephone 12, and it is also possible to hold or transfer the call during the call.

(g) By scanning the volume changeover switch 61, the ringing volume can be changed, and it can also be easily matched to the volume level of the 80M function, which helps prevent excessive input.

(H) As an overlap between each mode, for example, when listening to BGM on the hands-free telephone 12, if there is an incoming call from an outside line or intercom 14, the mute function is activated and the call takes priority, and the BGM returns as soon as the call ends. do.

(Effects of the Invention) As described above, according to the present invention, the four functions of a telephone function, an intercom function, an audio function, and an extension call function can be realized with a small and simple configuration.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the configuration of a telephone system according to an embodiment of the present invention, FIG. 2 is a configuration diagram showing details of the main device in FIG. 1, and FIG. 3 is a detailed diagram of the hands-free telephone shown in FIG. 1. FIG. 10--telephone system 11--main device 12--hands-free telephone 13--telephone handset 14--intercom 15--audio equipment 17--control switching circuit 24--interphone connection circuit 26--audio equipment Input circuit 37--Hands-free call circuit 50--Audio output circuit 60--Bass control switch 61--Volume selection switch Fig. 1

Claims (2)

[Claims] (1) In a telephone system having a main device connected to a telephone line and a hands-free telephone connected to the main device, the main device has a telephone handset connection circuit, the telephone handset and the hands-free telephone. The hands-free telephone includes a switch for connecting a telephone communication circuit, an intercom connection circuit, and an audio equipment input circuit, and the hands-free telephone is connected to a telephone handset and an intercom via the main device. and an audio output circuit that sends out the output of an audio device via the main device. (2) The telephone system according to claim 1, wherein the main device includes a volume changeover switch that changes the ringing volume between the main device, the hands-free telephone, and the telephone handset.