JPH06216991A - Telephone set - Google Patents

Abstract

PURPOSE:To attain extension talking with a slave set of a cordless telephone set connected in parallel. CONSTITUTION:The telephone set is provided with a line DC voltage generating section 16 sending a line DC voltage to a parallel connection line 17 for extension talking and with a ringer signal generating section 15 sending a ringer signal to the parallel connection line 17 when extension talking is requested and with a switch section 14. Thus, when no extension talking is executed, the parallel connection line 17 is connected to a telephone line 11 and when the extension talking is executed, the parallel connection line 17 is connected to a speech section main body 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone device in which a public telephone line and a parallel connection line are connected and an extension call is made with a telephone device connected through the parallel connection line.

[0002]

2. Description of the Related Art A cordless handset has been conventionally proposed for inter-slave communication as follows. That is, two sets of transmission / reception circuits (one is a first transmission / reception circuit and the other is a second transmission / reception circuit) are provided on the master unit side, and two slave units (one is a first slave unit and the other is a second slave unit). When making an extension call between the second handset), the first handset transmits data instructing to call the second handset to the base, and The transceiver circuit of the first slave is wirelessly connected to the first transceiver circuit, and the transceiver circuit of the second slave is wirelessly connected to the second transceiver circuit. Then, by connecting the first transmission / reception circuit and the second transmission / reception circuit inside the master unit, a communication path is formed between the first slave unit and the second slave unit via the master unit. It was

[0003]

However, when a cordless telephone having the above-mentioned configuration is newly purchased and both the parent device of this cordless telephone and the cordless telephone which has been used until then are used in parallel with the public telephone line, Since extension calls cannot be made between the cordless handsets of the old and new cordless phones, it was inconvenient to use them together.
Therefore, in order to construct a convenient telephone system, there has been a problem that the cordless telephones that have already been used must be discarded and a new cordless telephone having the required number of cordless handsets must be purchased.

The present invention was devised to solve the above problems, and an object of the present invention is to provide a telephone device capable of making an extension call between a cordless telephone handset connected in parallel. It is in.

[0005]

In order to solve the above-mentioned problems, a telephone device of the present invention has an extension telephone connection with a parallel telephone device connected to a telephone line and a parallel line and connected via the parallel line. Applies to the telephone device that performs the call, and connects the telephone unit that communicates with the telephone device connected via the telephone line, and the parallel connection line to the telephone line when the extension call is not performed and the parallel connection line when the extension call is performed. Switch to connect the main unit to the call unit, a line DC voltage generator that sends a line DC voltage to the parallel line when making an extension call, and a ringer signal that sends a ringer signal to the parallel line when requesting an extension call. And a generator.

[0006]

In the extension call, the line DC voltage from the line DC voltage generator is sent to the parallel line. Further, the ringer signal from the ringer signal generator is sent to the parallel connection line. When the telephone device connected to the parallel line goes off-hook in response to the line DC voltage and the ringer signal,
An extension call is made between the parallel telephone device connected via the parallel line and the communication unit body.

[0007]

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

FIG. 1 is a block diagram showing the electrical construction of an embodiment in which the telephone device of the present invention is applied to a cordless telephone.

In the figure, a telephone line 11 is led to a ringer circuit 21 via a line jack 41 and to one terminal of each of the switches S1 and S2. The output of the ringer circuit 21 is given to the speaker 22.

The other terminal of the switch S1 is connected to one terminal of the switch S3 and also to the AC terminal of the diode bridge 23. The DC terminal of the diode bridge 23 is led to the emitter of the transistor Q1, and the base of the transistor Q1 is the transistor Q1.
2 and the emitter of the transistor Q2 is grounded.

The collector of the transistor Q1 is connected to the speech circuit 26, and the output of the speech circuit 26 is introduced into the transmission circuit 25. The output of the reception circuit 27 is given to the speech circuit 26 and the data demodulation circuit 31, and the antenna 28 is connected to the transmission circuit 25 and the reception circuit 27. Further, a slave unit 30 to which the antenna 29 is connected is provided.

The other terminal of the switch S2 and the other terminal of the switch S3 are connected to each other, and the master unit 39 is connected via the parallel connection line 17 connected to the parallel connection jack 42.
And a slave unit 40 is provided corresponding to the master unit 39.

The parallel connection line 17 has a parallel connection jack 42.
The output of the AC booster circuit 35 and the output of the DC booster circuit 37 are connected to each other via the. The output of the AC signal generator 34 and the output of the AC booster drive unit 36 are given to the AC booster circuit 35. There is. The output of the DC boost drive unit 38 is introduced to the DC boost circuit 37, and the AC boost drive unit 3
The output of the data analysis unit 33 is led to the DC power supply 6 and the DC boost drive unit 38.

The output of the data demodulation circuit 31 is sent to the data analysis section 33, and the output of the data analysis section 33 is introduced to the switch drive section 32. The output of the switch driving section 32 is given to the switch section 14.

In the above structure, the switch section 14 has three switches.
The ringer signal generator 15 is composed of three blocks, that is, an AC signal generator 34, an AC booster circuit 35, and an AC booster driver 36. The line DC voltage generator 16
Is composed of two blocks, a DC boost circuit 37 and a DC boost driver 38.

The call unit main body 13 is composed of 11 blocks indicated by the reference numerals 21 to 31, and the parallel connection telephone device 12 is composed of two blocks of a master unit 39 and a slave unit 40. Has become.

The details of the configuration of each block will be described below.

The ringer circuit 21 is a block that informs that there is an incoming call by ringing the speaker 22 when a ringer signal is introduced to the telephone line 11, and the diode bridge 23 indicates the polarity of the telephone line 11. It is a block for converting to a predetermined polarity.

A line switching circuit 24 composed of two transistors Q1 and Q2 serves as a block for opening and closing the connection between the diode bridge 23 and the speech circuit 26. The speech circuit 26 is a two-wire type of the telephone line 11. It is a block that converts the signal of (4) into a 4-wire type signal.

The transmitting circuit 25 and the receiving circuit 27 are a block for performing wireless communication with the slave unit 30, and the data demodulating circuit 31 is transmitted from the slave unit 30 and is received by the receiving circuit 27. It is a block that converts the received control signal into a digital signal.

The data analysis unit 33 analyzes the digital signal sent from the data demodulation circuit 31 to read the content indicated by the control signal from the slave unit 30,
It is a block that controls the operations of the switch drive unit 32, the AC boost drive unit 36, and the DC boost drive unit 38 according to the read contents. And the switch driver 32
Is the three switches S according to the instruction of the data analysis unit 33.
It is a block that controls the opening and closing of 1 to S3.

Further, the AC booster circuit 35 is provided in the parallel connection telephone device 1.
In order to drive the second ringer circuit, it is a block that boosts the AC signal supplied from the AC signal generator 34, and the AC boost driver 36 is a block that controls the operation of this AC boost circuit 35. There is.

The DC boosting circuit 37 is a block for generating a line DC voltage (48V) applied to the telephone line 11, and the DC boosting drive section 38 is a DC boosting circuit.
It is a block that controls the operation of the booster circuit 37.

The line jack 41 and the parallel jack 42
Is a connector for line connection provided in the case of the telephone device.
It is a telephone device connected to. The parallel telephone system 12 is a cordless telephone constructed within the scope of the prior art.

The call unit main body 13 is a block constructed within the range of the prior art as a cordless telephone, but the cordless handset 30 has a switch for requesting an extension call with the parallel telephone device 12. It has been newly added, and
A control signal generating means corresponding to the addition of the switch is also added.

The operation of one embodiment of the present invention having the above configuration will be described below.

In the standby state for waiting for an incoming call, all of the three switches S1 to S3 of the switch section 14 are set in a closed state. Therefore, the telephone line 11 is connected to both the parallel telephone device 12 and the call unit body 13.

On the other hand, since the communication unit main body 13 and the parallel connection telephone device 12 have the same constructions as those in the prior art and their operations are the same as those in the parallel connection of the two telephone devices in the conventional art, A call to the telephone line 11 or a response to an incoming call on the telephone line 11 is performed by the machine 30 or the child device 40.

An extension call is carried out between the slave unit 30 and the master unit (structured by blocks of 21 to 28, 31) or between the slave unit 40 and the master unit 39.

The operation when an extension call is made with the parallel telephone device 12 will be described below.

When an extension call switch (not shown) additionally installed in the handset 30 is operated, a control signal indicating an extension call with the parallel telephone device 12 is transmitted from the handset 30, and the control signal is received by the receiving circuit 27. , To the data analysis unit 33 via the data demodulation circuit 31.

A data analysis unit 33 to which a control signal is given
Since this control signal indicates an extension call with the parallel telephone device 12, the switch drive section 32 is instructed to open all the connections of the switches S1 to S3, and the switch is connected to the parallel telephone device 12. AC boost circuit 35
And DC boost circuit 37.

Further, the data analysis unit 33 sends an instruction to start the operation to the DC boost drive unit 38, which is the line DC voltage of 4
A DC voltage of 8V is sent from the DC boost circuit 37. Therefore, this line DC voltage is applied to the master unit 39 via the parallel connection line 17, and sets the speech circuit (not shown) provided inside the master unit 39 to the operable state.

In this state, the data analysis unit 33
An instruction to start the operation is given to the C boost driver 36, and a ringer signal is sent from the AC boost circuit 35.

The ringer signal transmitted at this time is
It is a single-shot signal that continues for a period of several seconds, and informs the user of the parallel telephone device 12 that the ringer signal is not an incoming call from the telephone line 11 but an extension call. It is like this.

After sending the ringer signal to the parallel connection line 17, the data analysis unit 33 causes the parallel connection telephone device 12 to operate.
In order to prepare for an extension call with, the switch driver 32 is instructed to close only the connection of the switch S3, and the speech circuit 26 is set to the operating state.

With the above operation, the call for the extension call is completed. After that, when the parallel telephone device 12 goes off-hook in response to this call, the slave unit 3
An extension call is made between 0 and the handset 40 of the parallel telephone device 12. When the handset on the side of the master unit 40 goes off-hook, the slave unit 30 and the master unit 4 are disconnected.
An extension call will be made with 0.

As described above, in the present embodiment, the configuration of the call unit main body 13 is a cordless telephone, so that the call unit main body 13 having only one set of transmitting / receiving circuits 25 and 27 is used as a cordless telephone. It has the effect of enabling extension calls.

The present invention is not limited to the above-mentioned embodiment, and as a telephone device to be applied, a cordless telephone comprising a master unit composed of blocks 21 to 28 and 31 and a slave unit 30 corresponding to this master unit. However, the present invention can be similarly applied to other telephone devices, for example, a multi-function telephone or the like in which a handset, which is a constituent element of the call unit body, is connected to a telephone line by wire. .

The parallel telephone device has been described as a cordless telephone, but the same applies to other telephone devices such as a multifunction telephone in which a handset is connected to a telephone line by wire. Is possible.

[0041]

The telephone device according to the present invention makes an extension call.
Line DC that sends line DC voltage to parallel line
When requesting an extension call while providing a voltage generator
Is the ringer signal generator that sends the ringer signal to the parallel line.
By providing and providing a switch, extension calls
If not, connect the parallel line to the telephone line and
When making a call, the parallel line should be connected to the call unit body.
Since it has been configured, it is possible to connect to the parallel telephone device via the parallel line.
Because the call and the call to
Extension call to a cordless handset handset
It becomes possible to perform
If it is a wired telephone such as a functional telephone,
The effect of enabling extension calls to and from the telephone
Have both.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of an embodiment in which a telephone device of the present invention is applied to a cordless telephone.

[Explanation of symbols]

 11 telephone line 12 parallel connection telephone device 13 call unit main body 14 switch unit 15 ringer signal generation unit 16 line DC voltage generation unit 17 parallel connection line

Claims (1)

[Claims] 1. A telephone device having a parallel line connected to a telephone line and performing an extension call with the parallel telephone device connected via the parallel line, the telephone device being connected via the telephone line. A call unit main body for making a call with a telephone device, a switch unit for connecting the parallel connection line to the telephone line when not making an extension call, and for connecting the parallel connection line to the call unit body when making an extension call, A line DC voltage generator that sends a line DC voltage to the parallel connection line when making an extension call, and a ringer signal generator that sends a ringer signal to the parallel connection line when requesting an extension call. Telephone equipment.