JPH05183614A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To prevent a voice of a caller from being leaked to a talking opposite party at interruption talking by switching a 1st transmission-reception circuit forming a speech circuit to a line provided on a master set or a slave set and a 2nd transmission-reception circuit separated from the line. CONSTITUTION:The bell of a bell tone section 49 rings through a bell detection section 42 by an incoming call signal through line terminals 11a, 11b provided on the master set 10. When a handset H is lifted up in response to it, a hook switch 43 is closed, a line switch 13 is closed by a control signal generating section 47 to form the 1st transmission-reception circuit of the master set 10. When an interruption switch 46 is closed during talking by this circuit, a 2nd transmission-reception circuit is formed through a radio control section 51 and a radio section 24, etc., and the switch 35 of a transmission circuit S is turned off via a switch control section 16 and the 1st transmission-reception circuit is interrupted from the communication opposite party. Thus, the voice of a caller is not leaked to the talking opposite party at the interruption talking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone, and more particularly to a cordless telephone that prevents a caller's call voice from flowing to the other party.

[0002]

2. Description of the Related Art In general, a cordless telephone is provided with a plurality of cordless handsets or dahphones in one base unit, and an extension call, a line call, an extension line call, a handset call, Multi-party call (hereinafter referred to as "N-party call"), transfer call, hold transfer call, answering machine management,
Door phone answering machine call, call time management, display management, reservation call management, etc. can be performed.

Therefore, in addition to line communication, this cordless telephone (1) calls a slave unit or calls the master unit from the slave unit. (2) Calls another slave unit from the slave unit to talk between the slave units. What to do (call between handset), (3), other caller (caller of calling party) make an interruption call during a call (interruption call) (4), make an N-party call at the same time, Etc. are possible.

[0004] Such a cordless telephone, in particular, has a problem in that when a call is interrupted, the voice of the caller leaks to the other party of the call, making the other party uncomfortable and also leaking important information.

The present invention provides a cordless telephone which prevents the caller's voice or the like from leaking to the other party when making an interrupted call.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a cordless telephone having a master unit and a plurality of slave units and capable of communicating with an extension line or a line. A first transmission / reception circuit forming a communication circuit, a second transmission / reception circuit which is separated from the line and is switchably connected to the master or slave of the first transmission / reception circuit, and the second transmission / reception circuit (1) A cordless telephone having a switching control device for switching and connecting to a master unit or a slave unit of one transmission / reception circuit.

Further, in a cordless telephone having a base unit and a plurality of handset units and capable of making a call with an extension line or a line, the first transmission for forming a call circuit with the line provided in the base unit or the handset unit. The receiving circuit, the second transmitting / receiving circuit connected to the receiving circuit of the first transmitting / receiving circuit and switchably connected to the transmitting circuit of the master unit or the slave unit, and the second transmitting / receiving circuit as the first transmitting / receiving circuit. Provided is a cordless telephone which is equipped with a receiver circuit of a circuit and a switching control device which is switchably connected to a transmitter circuit of a master unit or a slave unit.

[0008]

It is possible to make an interrupt call with the caller during a call and prevent the call information of the caller from leaking to the other party.

Further, it is possible to make an interrupt call with the caller during a call and send the call information to the caller while obtaining the call information from the line.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the cordless telephone of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are block diagrams of a cordless telephone set which enables an interrupt call of a slave unit 60 to a master unit 10 equipped with a handset H.

The base unit 10 of the cordless telephone of FIG. 1 is provided with connection terminals 11a and 11b connected to a line (not shown). A speech network 15 having a reception circuit R and a transmission circuit S is connected to the connection terminals 11a and 11b via a full-wave rectifier 12, a line switch 13, and a side tone section 14.

The speech network 15 has a switch 17 which is switch-controlled by a switch controller 16.
The handset H including the handset 20 and the microphone 21 is connected via 18, an amplifier 19, and the like. In addition, a modulation input unit 2 that sends a modulation signal to the radio unit 24 via the switch 22 and the switch 23, which are switch-controlled by the switch control unit 16, to the speech network 15.
5 is connected. The radio section 24 includes a detection output section 26,
It is connected between the switch 17 and the amplifier 19 via the switch 27, the switch 28, and the amplifier 29.

The speech network 15 is provided with an amplifier 30 for amplifying a voice signal received by the side tone section 14, and the amplifier 30 is provided with a switch 31 and an amplifier 32 which are switch-controlled by the switch control section 16. It is connected to the switch 17. The switch 31
An amplifier 33 for amplifying the detection signal received via the switch 28 is connected to the.

An amplifier 34 for amplifying a voice signal received through the switch 18 is connected to the speech network 15, and a switch 35 and an amplifier 36, which are switch-controlled by the switch controller 16, are connected to the amplifier 34. The side tone section 14 is connected.

Reference numeral 37 is a speech network 15.
Similarly, the auxiliary amplifier 38 provided in the transmission circuit S of FIG. 3 is a power supply circuit that supplies power to each amplifier of the speech network 15. Further, the output side of the side tone section 14 and the switch 2
A bypass path 40 having a capacitor 39 is connected to 2 and an amplifier 41 is connected between the output terminal of the amplifier 32 and the switch 17 and the switch 22 so that the audio signal is directly input to the modulation input section 25. I am able to send it.

A bell detector 42 for receiving an incoming signal from the line is connected to the connection terminals 11a and 11b, and the output terminal is provided with a hook switch 43, a switch 44, an extension switch 45, an interrupt switch 46 and the like to generate a control signal. The part 47 is connected.

The control signal generator 47 includes a line controller 4
8, the switch control unit 16, the bell sound unit 49, the control signal transmission unit 50, the wireless control unit 51, etc. are connected.

The line controller 48 includes the switch controller 1
6 is connected to receive incoming signals and switch control signals,
The line switch 13 is controlled. When the control signal transmission unit 50 receives the incoming signal, the control signal transmission unit 50 sends the transmission signal to the wireless unit 24. When the wireless controller 51 receives an incoming signal, a channel command signal and a wireless control signal are sent to the wireless unit 24.

The radio unit 24 and the switch control unit 1 are also provided.
A control signal receiving section 52 is provided between the wireless section 2 and
The control signal from the switch 4 is sent to the switch control unit 16, and the switch control unit 16 generates the switch control signal.

Reference numeral 53 is a power source of the master unit 10, 54 is a power source circuit of the master unit 10, 55 is a switch of the power source circuit 53, and 56.
Is a backflow blocking rectifier.

FIG. 2 shows a main block diagram of a slave unit 60 used as a pair with the master unit 10.

The slave unit 60 is provided with a radio unit 61 that receives radio waves from the radio unit 24 of the master unit 10. A receiver 65 of the handset Hb is connected to the radio unit 61 via a detection output unit 62 and a switch 63. Also,
Switch 6 on the microphone 66 of the handset Hb
7. The wireless unit 61 is connected via the modulation input unit 68.

A control signal receiving section 69 is connected to the radio section 61, and an output signal thereof is sent to a sounder 71 via a bell section 70 to generate a voice. A control unit 72 is connected to the control signal receiving unit 69 and controls the opening and closing of the switches 63 and 67.

A signal transmitter 75 having a control switch 73 and a response switch 74 is connected to the slave unit 60,
A control signal generated by opening / closing the control switch 73 or the response switch 74 is sent to the modulation input section 68 so that an interrupt call or the like with the master device 10 can be performed.

The operation of the cordless telephone having the above construction will be described with reference to the operation sequence shown in FIG.

First, the case where the base unit 10 talks with the other party on the line will be described.

Now, from the other party, the connection terminals 11a, 1
When the incoming call signal is sent to 1b, the incoming call signal is sent to the control signal generation unit 47 via the bell detection unit 42. This incoming signal is sent to the bell sound unit 49 via the control signal generation unit 47.
Is sent to and makes the bell sound.

When the handset H is picked up by the ringing of the bell sound, the hook switch 43 is closed.
By closing the hook switch 43, the control signal generator 4
The control output signal from 7 is sent to the line controller 48, and the line switch 13 is closed by the output signal.

The control output signal from the control signal generator 47 is sent to the switch controller 16 to connect the switch 35 from the contact point c2 to the contact point a2 and the switch 31 from the contact point a6 to the contact point c3. Switches 17 and 18 are closed and switches 23 and 27 are open. As a result, the line and the first transmission / reception circuit of the base unit 10 are formed, and it becomes possible to communicate with the other party.

Next, a case will be described in which the handset 60 receives a call from the other party via the base unit 10.

When an incoming call signal is received at the connection terminals 11a and 11b from the other party, the incoming call signal is sent to the control signal generator 47 through the bell detector 42. The control signal generator 47 receives the incoming call signal and sends the control signal to the switch controller 16, the line controller 48, the control signal transmitter 50, and the wireless controller 51. When the switch control unit 16 receives the control signal, the switches 23 and 27 are opened, the switch 22 changes from the contact 2 to the contact c6, and the switch 28 changes from the contact 2 to the contact c7.
When the line control unit 48 receives the control signal, the line switch 13 is opened, and when the control signal transmission unit 50 receives the control signal, an incoming signal for calling the handset 60 is sent to the wireless unit 24. When the control unit 51 receives the control signal, a channel control signal that specifies the channel of the handset 60 is sent to the wireless unit 24.

The incoming signal and the channel control signal are sent from the radio unit 24 of the base unit 10 to the radio unit 61 of the handset 60. When the wireless unit 61 of the slave unit 60 receives an incoming signal or the like, the slave unit 60 sends an incoming call response signal to the master unit 10. Here, the call channels of the master device 10 and the slave device 60 are switched. When the channel of the child device 60 is switched and an empty channel is confirmed, this is notified to the parent device 10 (see FIG. 3).

When the idle channel is formed, the ringing signal based on the incoming signal received by the base unit 10 is transmitted to the bell detecting section 4.
2, control signal generation unit 46, wireless control unit 51, wireless unit 24
Is transmitted to the wireless unit 61 of the child device 60 via.

This calling signal is sent from the radio section 61 to the control signal receiving section 69, and this control output signal is sent to the sounder 71 via the bell section 70 to generate sound and is also sent to the control section 72 to be sent to the switches 63, 67. Is closed, and a link between the line, the master device 10 and the slave device 60 is formed.

When the response switch 74 is closed here,
A response signal is generated from the signal transmitter 75. This response signal is transmitted to the wireless unit 2 via the modulation input unit 68 and the wireless unit 61.
Sent to 4. Upon receiving this response signal, the wireless unit 24 sends the output signal to the switch control unit 16 via the control signal receiving unit 52.

When the switch control section 16 receives the output signal, the line switch 13 is closed via the line control section 48,
The switches 17 and 18 are opened, the switches 23 and 27 are closed, the switch 35 switches from the contact c2 to the contact a2, and the switch 31 switches from the contact a6 to the contact c3n.
A first transmission / reception circuit between the line and the handset 60 is formed via the line, and a call between the line and the handset 60 becomes possible.

During a call between the line and the handset unit 60, by calling the handset unit 60, in order to interrupt the base unit 10, the hadset H is taken up, the hook switch 43 is closed, and then the extension switch 45 is pushed. As a result, the control signal generator 47
The output signal from the master unit 10 is sent to the wireless control unit 51, and as in the case of forming the transmission / reception circuit between the slave unit 60 and the line, the communication channel is designated, the incoming call is answered, the channel is switched, etc. And a link of the child device 60 is formed.

When the control signal generator 47 sends the extension call information to the control signal transmitter 50, the extension call signal is sent to the wireless unit 61 via the wireless unit 24. Radio unit 6 by this extension call signal
1 receives a response signal to the wireless unit 24, the response signal is transmitted via the control signal receiving unit 52 to the switch control unit 1.
Sent to 6.

When the switch control section 16 receives this response signal, the switches 23 and 27 are closed, and the contact 3 to the contact c7 of the switch 28 and the contact 3 to the contact c7 of the switch 22 are closed.
To the contact point a3 of the switch 35, and the contact point a5 of the switch 31 to the contact point c3.
Is stopped and the line switch 13 is opened.

Therefore, the main unit 1 with the line disconnected
A second transmission / reception circuit between 0 and the child device 60 is formed, and the parent device 10 can be interrupted on the child device 60 side during a call between the line and the child device 60.

Next, a case will be described in which the handset 60 makes an interrupt call while the base unit 10 is in a call with the other party on the line.

The interrupt switch 46 is closed during the outside line communication between the base unit 10 and the outside line, and the control signal from the control signal generation unit 47 is sent to the switch control unit 16 and the wireless control unit 51.
When the switch controller 16 receives the control signal, the switch 2
7 and 23 are opened, and when the wireless control unit 51 receives the control signal, the communication channel is designated, the incoming call is answered, and the channel switching master unit 10 is operated in the same manner as in the case where the first parent-child transmission / reception circuit is formed. A link with the child device 60 is formed. When the link is formed, a control signal is generated from the control signal receiving section 69 and a sound is generated from the sounder 71 via the bell section 70.

The voice from the sounder 71 picks up the handset Hb, and the response switch 74 is closed. As a result, the response signal is sent to the handset H via the signal sending unit 75, the modulation input unit 68, the wireless unit 61, the wireless unit 24, the detection output unit 26, the switch 28, the amplifier 29, and the amplifier 19, and the second interrupt handset circuit. Is formed. When the second transmission / reception circuit is formed, the switch 35 of the transmission circuit S is released, so that the transmission circuit between the handset 60 and the line is cut off.

As a result, the first transmission / reception circuit between the line and the base unit 10 and the second transmission / reception circuit between the base unit 10 and the handset 60 are formed separately and independently so that the caller can communicate with the other party of the line as the handset. A call can be made without leaking the caller's call.

FIGS. 4 and 5 show the master unit 10 shown in FIG.
2 is a block diagram of another embodiment in which the handset H is removed and the cordless handsets 60A and 60B are used to carry out a call using two different channels CCH1 and CCH2.

The block configuration in this embodiment is substantially the same except that the switch control unit 70 is of the multiple switching type and a plurality of parts of the master unit 10AB are provided corresponding to the slave units 60A and 60B. The parts will be described with reference numerals A and B and detailed description omitted.

The To terminal of the switch control unit 70 is the terminal of the transmission circuit S of the speech network 15, the Ro terminal of the switch control unit 70 is the terminal of the reception circuit R of the speech network 15, and the RL terminal of the switch control unit 70. The output terminal of the line switch 13 is connected to.

The R1 terminal of the switch control unit 70 has the output terminal of the detection output unit 26A, the T1 terminal of the switch control unit 70 has the input terminal of the modulation input unit 25A, and the R2 terminal of the switch control unit 70 has the R2 terminal. The output terminal of the detection output section 26B is connected to the T2 terminal of the switch control section 70 at the modulation input section 25.
The B input terminal is connected. The control signal generator 4 is included in the switch opening / closing controller 71A of the switch controller 70.
7, the control signal receiving unit 52A, the control signal transmitting unit 50A, the wireless control unit 51A, etc., the switch opening / closing control unit 71B of the switch control unit 70, the response signal terminal of the control signal generation unit 47, the control signal reception The unit 52B, the control signal transmitting unit 50B, the wireless control unit 5BA, and the like are connected.

The switch opening / closing control section 71A is provided so as to perform a switching operation on the changeover switch 72, the switch 74, and the switch 75, and the switch opening / closing control section 71B performs a switching operation on the changeover switch 73, the switch 76, and the switch 77. It is arranged to do.

In the embodiment configured as described above, first, the case where the line and the handset 60A communicate with each other will be described with reference to FIG.
The sequence circuit will be described with reference to FIG. This call uses the same operation as the call between the line and the handset 60, and the wireless unit 2
4A to the slave unit 60A, and from the slave unit 60A to the wireless unit 2
A signal is exchanged with 4A and a link is formed by the CCH1 channel, and the peach network 15 and the switch control unit are connected by connecting the switches 72 and 73 to the a contact under the control of the switch opening / closing control unit 71A of the switch control unit 70. It is possible to form a first call circuit with the 70, the radio unit 24A, and the handset 60A to enable a call between the callee and the caller.

Next, in this call state, the handset 60A
A case will be described in which the cordless handset 60B is called from, and the handset 60A obtains the information from the handset 60B based on the call information of the line.

First, the call switch 73 of the handset 60A
A is pressed. By this pressing operation, control signals are transmitted to the signal transmission unit, the modulation input unit, the wireless unit, and the master unit 10A of the slave unit 60A.
It is sent to the control signal receiving unit 52A via the wireless unit 24A of B. When the control signal receiving unit 52A receives the control signal, the switch opening / closing control unit 71A of the switch control unit 70 is controlled via the control signal generation unit 47, and the switches 74 and 75 are closed.

Therefore, the wireless unit of the slave unit 60B, the wireless unit 24B, the detection output unit 26B, the switch 74, the modulation output unit 25A, the wireless unit A, and the slave unit 60A via the switch control unit 70.
The receiver circuit of the wireless unit of the
Information from B can be obtained.

The cordless handset 60B has a line and line switch 1
3, the switch 75, the modulation output unit 25B, the radio unit B, and the transmission circuit of the radio unit of the handset 60B are formed, and the handset 60B can obtain information from the line.

However, since the transmission circuit between the handset 60B and the handset 60A is cut off by the switch 73 on the line, the information of the handset 60B is not leaked to the line.

Therefore, the caller of the handset unit 60A can talk with the line and obtain information from the handset unit 60B.

On the contrary, while the line with the cordless handset 60B is in communication, the cordless handset 60B calls the cordless handset 60A for interruption, and the cordless handset 60B obtains the information from the cordless handset 60A based on the call information of the line. Almost the same can be done when obtaining.

In addition, depending on the configuration of the switch control unit 70, it is possible to easily configure an interrupt circuit such that the call circuit of the interrupter is used only by connecting to the slave device while the call is being communicated between the slave device and the line. ..

[0060]

According to the present invention, in a cordless telephone having a master unit and a plurality of slave units and capable of communicating with an extension or a line, a communication circuit with the line is provided for the master unit or the slave unit. A first transmission / reception circuit, a second transmission / reception circuit which is separated from the line and is switchably connected to a master unit or a slave unit of the first transmission / reception circuit, and the second transmission / reception circuit is a first transmission / reception circuit. And a switching control device for switching and connecting to the master unit or the slave unit, the caller obtains appropriate call information from the second handset circuit during the call of the first handset circuit and the first handset No call information is sent to the circuit.

Further, in a cordless telephone having a master unit and a plurality of slave units and capable of communicating with an extension line or a line, the first transmission for forming a communication circuit with the line provided in the master unit or the slave unit. The receiving circuit, the second transmitting / receiving circuit connected to the receiving circuit of the first transmitting / receiving circuit and switchably connected to the transmitting circuit of the master unit or the slave unit, and the second transmitting / receiving circuit as the first transmitting / receiving circuit. Since the receiver circuit of the circuit and the switching control device for switching and connecting to the master unit or the slave unit are provided,
The caller does not receive the call information from the second handset circuit while the caller obtains the call information from the second handset circuit during the call of the first handset circuit.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of a master unit of a cordless telephone of the present invention.

FIG. 2 is a block diagram showing an outline of a slave unit of the cordless telephone of the present invention.

FIG. 3 is a sequence diagram showing the operation of the cordless telephone of the present invention.

FIG. 4 is a block diagram showing an outline of a base unit of another embodiment of the cordless telephone of the present invention.

5 is a block diagram showing an outline of a switch control unit in FIG.

FIG. 6 is a sequence diagram showing the operation of another embodiment of the cordless telephone of the present invention.

[Explanation of symbols]

 10 parent unit 11a, 11b connection terminal 12 external line switch 14 side tone section 15 speech network 16 switch control section 17, 18 switch 19 handset amplifier 20 handset 21 microphone 22, 23 switch 24 wireless section 25 modulation input section 26 detection output section 27, 28 switch 31 switch 32 buffer amplifier 33, 34 amplifier 35 switch 35 36 amplifier 42 bell detection unit 43 hook switch 44 key switch 45 extension call switch 46 interrupt switch 47 control signal generation unit 48 external line control unit 49 bell sound unit 50 control signal reception Section 51 wireless control section 52 control signal receiving section 60 slave unit 61 wireless section 62 detection output section 63 switch 65 receiver 66 microphone 67 switch 68 modulation input section 69 control signal receiving section 70 bell section 1 sounder 72 control unit 73 controls the switch 74 responsive switch 70 switch control unit 71A, 71B switch the switching control unit 72,73,74,75,76,77 switch

Claims (2)

[Claims] 1. A cordless telephone having a master unit and a plurality of slave units and capable of communicating with an extension line or a line, the first transmission forming a communication circuit with the line provided in the master unit or the slave unit. A receiving circuit, and a second circuit which is separated from the line and is switchably connected to the master unit or the slave unit of the first transmitting / receiving circuit.
A cordless telephone comprising a transmission / reception circuit and a switching control device for switching and connecting the second transmission / reception circuit to a master unit or a slave unit of the first transmission / reception circuit. 2. A cordless telephone having a master unit and a plurality of slave units and capable of communicating with an extension or a line, and a first transmission forming a communication circuit with the line provided in the master unit or the slave unit. The receiver circuit, the second transmitter / receiver circuit connected to the receiver circuit of the first transmitter / receiver circuit and switchably connected to the transmitter circuit of the master unit or the slave unit, and the second transmitter / receiver circuit as the first transmitter / receiver circuit. A cordless telephone, comprising: a receiving circuit of a receiving circuit and a switching control device for switching connection to a transmitting circuit of a master unit or a slave unit.