JP2937672B2 - Telephone equipment - Google Patents

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 line are connected, and an internal telephone call is made with a telephone device connected through the parallel line.

[0002]

2. Description of the Related Art Calls between cordless handsets conventionally proposed in cordless telephones are 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 side, and two slaves (one is the first slave and the other is the first slave). Is called a second slave unit), the first slave unit transmits data instructing the calling of the second slave unit to the master unit, and the first slave unit transmits the data to the master unit. The transmission / reception circuit of the first slave unit is wirelessly connected to the first transmission / reception circuit, and the transmission / reception circuit of the second slave unit is wirelessly connected to the second transmission / reception circuit. Then, the first transmission / reception circuit and the second transmission / reception circuit are connected inside the master unit, thereby forming a communication path between the first slave unit and the second slave unit via the master unit. Was.

[0003]

However, when a cordless telephone having the above-mentioned configuration is newly purchased and both the cordless telephone and the former cordless telephone are used side by side with a public telephone line, Extension calls between cordless handsets of old and new cordless telephones are not possible, so using them together has been inconvenient.
Therefore, in order to construct a convenient telephone system, there has been a problem that the cordless telephone that has already been used must be discarded and a new cordless telephone provided with the required number of slaves must be purchased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a telephone device capable of making an extension call between cordless telephones connected in parallel. It is in.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a telephone device according to the present invention is connected to a telephone line and a parallel line, and is capable of making an extension call with the parallel telephone device connected via the parallel line. A telephone unit that applies to a telephone device that makes a call and communicates with a telephone device that is connected via a telephone line. A switch unit for connecting a telephone line to the communication unit main unit, a line DC voltage generating unit for transmitting a line DC voltage to the parallel line when making an extension call, and a call for the extension line when making a request for an extension call.
And a ringer signal generator for generating and sending a ringer signal indicating the following.

[0006]

In the case of an extension call, the line DC voltage from the line DC voltage generator is sent to the parallel line. Further, a ringer signal from the ringer signal generator is transmitted to the parallel line. Then, 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 performed between the parallel telephone device connected via the parallel line and the communication unit main body.

[0007]

An embodiment of the present invention will be described below with reference to the drawings.

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

In FIG. 1, a telephone line 11 is guided to a ringer circuit 21 via a line jack 41 and to one terminal of each of switches S1 and S2. The output of the ringer circuit 21 is provided to a speaker 22.

The other terminal of the switch S1 is connected to one terminal of the switch S3 and 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 connected to the transistor Q1.
2 and the emitter of the transistor Q2 is grounded.

The collector of the transistor Q 1 is connected to a speech circuit 26, and the output of the speech circuit 26 is introduced to a transmission circuit 25. The output of the receiving circuit 27 is provided to a speech circuit 26 and a data demodulating circuit 31, and an antenna 28 is connected to the transmitting circuit 25 and the receiving circuit 27. A slave 30 to which an 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 are connected to the master unit 39 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, and the output of the AC signal generator 34 and the output of the AC booster driver 36 are supplied to the AC booster 35. I have. The output of the DC boosting drive unit 38 is introduced into the DC boosting circuit 37, and the AC boosting drive unit 3
The output of the data analysis unit 33 is guided to 6 and the DC boosting drive unit 38.

The output of the data demodulation circuit 31 is sent to a data analyzer 33, and the output of the data analyzer 33 is introduced to a switch driver 32. The output of the switch drive unit 32 is provided to the switch unit 14.

In the above configuration, the switch unit 14 has three switches.
The ringer signal generator 15 is configured by three blocks of an AC signal generator 34, an AC booster circuit 35, and an AC booster driver 36. And the line DC voltage generator 16
Is composed of two blocks, a DC boosting circuit 37 and a DC boosting drive section 38.

The communication section main body 13 is composed of eleven blocks indicated by reference numerals 21 to 31. The parallel telephone device 12 is composed of two blocks of a master unit 39 and a slave unit 40. It has become.

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

The ringer circuit 21 is a block which, when a ringer signal is guided to the telephone line 11, informs that there is an incoming call by sounding a speaker 22, and a diode bridge 23 controls the polarity of the telephone line 11. This is a block for converting to a predetermined polarity.

A line switching circuit 24 composed of two transistors Q1 and Q2 is 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 telephone line 11. Is converted into a four-wire signal.

The transmitting circuit 25 and the receiving circuit 27 form a block for performing wireless communication with the slave 30, and the data demodulation circuit 31 is transmitted from the slave 30 and 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.
According to the read content, the block controls the operation of the switch drive unit 32, the AC boost drive unit 36, and the DC boost drive unit 38. And the switch drive unit 32
Are three switches S according to the instruction of the data analysis unit 33.
It is a block for controlling the opening and closing of 1 to S3.

The AC booster circuit 35 is connected to the parallel telephone device 1.
In order to drive the second ringer circuit, the AC booster 36 is a block that boosts the AC signal given from the AC signal generator 34. The AC booster 36 is a block that controls the operation of the AC booster 35. I have.

The DC boosting circuit 37 is a block for generating a line DC voltage (48 V) applied to the telephone line 11, and the DC boosting drive unit 38
This is a block for controlling 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.
The telephone device is connected to the telephone device. The parallel telephone device 12 is a cordless telephone configured according to the prior art.

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

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

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

On the other hand, the communication unit main body 13 and the parallel telephone device 12 have the same configuration as that of the prior art, and their operations are the same as those of the conventional technology when two telephone devices are connected in parallel. The device 30 or the handset 40 makes a call to the telephone line 11 or responds to an incoming call on the telephone line 11.

An extension call is performed between the slave 30 and the master (constructed by blocks 21 to 28 and 31) or between the slave 40 and the master 39.

The operation for making an extension call with the parallel telephone device 12 will be described below.

When an extension switch (not shown) provided on the slave unit 30 is operated, a control signal indicating an extension call with the parallel telephone device 12 is transmitted from the slave unit 30, and the control signal is transmitted to the receiving circuit 27. Are supplied to the data analysis unit 33 via the data demodulation circuit 31.

The data analyzer 33 to which the control signal is given
Since the control signal indicates an extension call with the parallel telephone device 12, the switch driving unit 32 is instructed to open all the connections of the switches S1 to S3 and connected to the parallel telephone device 12. AC booster circuit 35
And the DC booster circuit 37.

The data analysis unit 33 sends an operation start instruction to the DC boosting drive unit 38, and outputs the signal of the line DC voltage of 4.
The DC voltage of 8 V is transmitted from the DC boosting circuit 37. Therefore, the line DC voltage is applied to master device 39 via parallel connection line 17, and a speech circuit (not shown) provided inside master device 39 is set in an operable state.

In this state, the data analyzer 33
An instruction to start the operation is given to the C step-up driving unit 36, and the ringer signal is sent from the AC step-up circuit 35.

The ringer signal transmitted at this time is:
This is a single-shot signal that lasts for a period of about several seconds, and informs the user of the parallel telephone device 12 that the call by the ringer signal is not an incoming call from the telephone line 11 but an internal call. It has become.

After transmitting the ringer signal to the parallel line 17, the data analyzing unit 33 outputs the ringer signal to the parallel telephone unit 12.
In order to prepare for an extension call with the user, only the connection of the switch S3 is closed by giving an instruction to the switch driving unit 32, and the speech circuit 26 is set to the operating state.

The above operation completes the call for the extension call. Then, when the parallel telephone device 12 goes off-hook in response to this call, the handset 3
An extension call will be made between 0 and the slave unit 40 of the parallel telephone device 12. When the handset on the side of base unit 40 goes off-hook, handset 30 and base unit 4
An extension call will be performed between 0 and 0.

As described above, in the present embodiment, since the configuration of the communication section main body 13 is a cordless telephone, the communication section main body 13 having only one set of transmission / reception circuits 25 and 27 is used between the slave units of the cordless telephone. It is possible to make an extension call.

The present invention is not limited to the above-described embodiment. As a telephone device to which the present invention is applied, a cordless telephone comprising a master unit constituted by blocks 21 to 28 and 31 and a slave unit 30 corresponding to the master unit However, the present invention can be similarly applied to other telephone apparatuses, for example, a multifunctional telephone in which a handset, which is a component of a communication unit main body, is connected to a telephone line by wire. .

Although the parallel telephone device has been described as a cordless telephone, the present invention is similarly applied to other telephone devices such as a multifunctional telephone in which a handset is connected to a telephone line by wire. Is possible.

[0041]

The telephone apparatus according to the present invention is provided with a line DC voltage generating section for sending a line DC voltage to the parallel line when making an extension call, and for the extension line when requesting an extension call. Indicates a call
A ringer signal generator for generating and transmitting a ringer signal is provided, and a switch unit is provided so that the parallel line is connected to the telephone line when the extension call is not performed, and the parallel line is talked when the extension call is performed. Since it is configured to be connected to the main unit, a call to the parallel telephone device and a telephone call are performed via the parallel line, so that an extension telephone call is performed with the cordless telephone subunit that is connected in parallel. In addition to this, when the connected telephone is a wired telephone such as a multifunctional telephone, an extension call can be made with the telephone . Also, phosphorus
Generates a signal and sends it out to the parallel line, so it is paralleled
There is also an effect that a conventional telephone can be used as the telephone .

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Telephone line 12 Parallel connection device 13 Communication part main body 14 Switch part 15 Ringer signal generation part 16 Line DC voltage generation part 17 Parallel connection line

Claims (1)

(57) [Claims] 1. A telephone device connected to a telephone line and a parallel line, and performing an extension call with the parallel telephone device connected via the parallel line, wherein the telephone device is connected via the telephone line. A telephone unit for making a telephone call with a telephone device, a switch unit for connecting the parallel line to the telephone line when not making an extension call, and connecting the parallel line to the telephone unit when making an extension call; A line DC voltage generator for transmitting a line DC voltage to the parallel line when making an extension call, and an extension call to the parallel line when requesting an extension call
And a ringer signal generator for generating and transmitting a ringer signal indicating that the call is a call.