JPH071906B2 - Station line relay method and cordless phone system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cordless phone system for connecting a data terminal device to a station line to perform data transmission, and a station line relay method in the cordless phone system.

[Prior Art] Conventionally, there is known a home telephone system in which a predetermined number of slave units are connected to a single master unit to perform extension calls between the slave units and curved calls from the slave units.

In addition, there are two types of station lines connected to the master unit, a dial pulse (DP) and a push button (PB), depending on the type of signal transmitted.

On the other hand, as a home telephone system, a cordless phone system is known in which a master unit and a slave unit are wirelessly connected to each other, for example, 264 MHz / 380 MHz.

[Problems to be Solved by the Invention] Conventionally, when a data terminal device such as a facsimile or a personal computer is connected to a cordless phone system slave unit to perform data transmission with an office line,
There is a problem in that it is impossible to make a call using the DP signal from the data terminal device.

That is, when the station line is DP, it is necessary to make a call to this station line by a DP signal, but for example, even if the data terminal device makes a call by the DP signal, this DP signal is wirelessly transmitted. Since it cannot be directly transmitted, the central line is not connected. In wireless connection between the master and slave, PB
Although the signal can be transmitted, even if the data terminal device makes a call by the PB signal when the station line is DP,
It did not accept PB signals and therefore was unable to connect the data terminal equipment to the office line.

In addition, there may be a method of distinguishing between DP and PB by keys such as “*” and “#”, but these keys are already used in the multi-functional operation of cordless phones. Will create a new identification problem.

A method of converting a DP signal into a PB signal and transmitting the converted signal can be considered in the slave unit, but this method requires a configuration for detecting the end of the DP signal, for example, a timer. In this case, it is difficult to distinguish between the inter-digit pause and the end of the DP signal, and if the timer setting time is set long to avoid erroneous identification, the relay delay time becomes long.

If the DP signal is independently transmitted and received wirelessly, a circuit for this is required, and the configuration is enlarged.

The present invention has been made to solve the above problems, and a curve relay method and a curve relay method capable of connecting a data terminal device to a station line even when the station line is DP. It is intended to provide a cordless phone system.

[Means for Solving the Problem] In order to achieve the above object, the present invention converts a DP signal emitted from a data terminal device into a PB signal in a slave unit and relays it to a master unit, and further performs this conversion. , P signal corresponding to each digit of the telephone number represented by the DP signal is added with PBs belonging to the highest column of DTMF to generate a DTMF signal corresponding to the PB sequence.

Further, in the present invention, the slave unit is a DTMF signal corresponding to a PB sequence in which the DP signal supplied from the data terminal device is added to each digit of the telephone number represented by the DP signal with the PB belonging to the highest column of DTMF. The PB signal sent from the PB dialer to the master unit is added to each digit, and the PB belonging to the highest column is added to each digit.
If the PB detection circuit that detects that it is a DTMF signal and that the PB belonging to the highest column is added to each digit of the PB signal by the PB detection circuit, convert the PB signal to a DP signal. When a data terminal device makes a call with a DP signal, it includes a DP sending circuit for sending to the central office line, and converts this DP signal into a DTMF signal with PB belonging to the highest column added to each digit It is characterized in that the base unit converts the DTMF signal into a DP signal and sends it to the central office line.

[Operation] In the station line relay method of the present invention, first, in the slave, the DP signal emitted from the data terminal device is converted into a PB signal. This conversion is performed by generating a DTMF signal corresponding to a PB string formed by adding PBs belonging to the highest column of DTMF to each digit of the telephone number represented by the DP signal. The DTMF signal thus generated is wirelessly transmitted from the child device to the parent device.

Further, in the cordless phone system of the present invention, the DP signal supplied from the data terminal device is converted into the PB signal by the PB dialer and sent to the master unit. This conversion is done by DT for each digit of the telephone number represented by the DP signal as described above.
It is performed so as to generate a DTMF signal corresponding to a PB sequence to which PBs belonging to the highest column of MF are added. Further, in the parent device, the PB signal sent from the PB dialer is detected by the PB detection circuit.

The detection by this PB detection circuit is to detect whether the PB belonging to the highest column is added to each digit, and as a result of this detection, it is detected that the PB belonging to the highest column is added to each digit. In this case, the PB signal is converted into a DP signal by the DP sending circuit and sent to the office line.

Therefore, in the station line relaying method and cordless phone system of the present invention, data transmission from the data terminal device to the station line is performed via the slave unit and the master unit.

[Embodiment] A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a circuit configuration of a cordless phone system according to an embodiment of the present invention.

The cordless phone system shown in FIG. 1 includes a base unit 10 connected to an office line and a handset 12 wirelessly connected to the base unit 10. Further, the base unit 10 has an extension line, an extension line, and an extension line. A doorphone is connected to the slave 12, and a data terminal device 14 such as a facsimile or personal computer is connected to the slave 12.

Further, the slave unit 12 is connected to the handset 20 including the transmitter 16 and the receiver 18, and the master unit 10 connected to the handset 20.
The cordless phone main body 22 for exchanging radio waves with the cordless phone main body 22 and the charging unit 26 for charging the battery 24 built in the cordless phone main body 22 are included. Further, the charging section 26 is connected to the data terminal device 14 by a modular jack 28, and also has an interface function between the data terminal device 14 and the main body 22.

The main body 22 is connected to an antenna 30, and the antenna 30
It includes a high-frequency circuit 32 that modulates and detects radio waves transmitted and received by the device, and a 4-wire 2-wire circuit 34 that is interposed between the high-frequency circuit 32 and the charging unit 26 and performs 4-wire 2-wire conversion. Further, the output terminal of the high frequency circuit 32 is connected to the receiver 18 via the amplifier 36.
Further, the input terminals are connected to the transmitter 16, respectively.

That is, when transmitting data from the data terminal device 14, this data is input to the high frequency circuit 32 via the charging unit 26 and the four-wire two-wire circuit 34 and transmitted from the antenna 30 to the master device 10. On the contrary, the signal wirelessly transmitted from the master device 10 is subjected to processing such as detection in the high frequency circuit 32, and then the 4-wire 2 signal.
It is input to the data terminal device 14 via the line circuit 34 and the charging unit 26.

When making a call with the handset 20, the output of the transmitter 16 is input to the high-frequency circuit 32, processed by the high-frequency circuit 32, and then transmitted to the master unit by the antenna 30. On the contrary, the signal transmitted from the master device 10 is output from the handset 18 via the high frequency circuit 32 and the amplifier 36.

Further, the main body 22 has a hook detection circuit 38 for detecting an off-hook of the slave 12, a keypad 40 for inputting a telephone number or the like, an LCD 42 for displaying a predetermined message, and a sounder 44 for emitting a ringing tone or the like. And an amplifier 46 that amplifies an input signal to the sounder 44, and these are further connected to a CPU (child) 48 that controls the operation of the main body 22.

That is, for example, when trying to make a normal telephone call with the handset 20, off-hook is detected by the hook detection circuit 38, for example, by gripping and lifting the handset 20, and further by inputting a desired telephone number by the keypad 40. A call is made based on the control of the CPU (child) 48.

On the other hand, the parent device 10 is a high-frequency circuit 50 that performs processing such as modulation and detection of signals related to transmission and reception with the child device 12,
A 2-wire 4-wire circuit 52 for converting the output of 2 to 4-wire, and a CPU (RF) 54 for controlling the operation of the high-frequency circuit 50 and detecting a wireless incoming call in the high-frequency circuit 50.

For example, if the parent device 10 and the child device 12 are connected by a radio wave of 264MHz / 380MHz, and there are 87 channels related to this wireless connection, for example, within the reach of the radio wave (the parent device).
If the 10 and the handset 12 are low-power cordless phones, the unused channel in the radius of about 100 m
F) 54 is searched, and one of the unused channels is selected for the call between the master unit 10 and the slave unit 12. The signal transmitted from the master unit 10 to the slave unit 12 is input from the 2-wire 4-wire circuit 52 to the high-frequency circuit 50, and the high-frequency circuit 50
After being subjected to processing such as modulation in 50, the signal is transmitted from the antenna 56. On the contrary, when receiving the radio wave emitted from the handset 12, the radio wave received by the antenna 56 is input to the high frequency circuit 50, and the CPU (RF) 54 detects a wireless incoming call and the 2-wire 4 The line circuit 52 is output after being subjected to processing such as detection.

The 2-wire / 4-wire circuit 52 is connected to an exchange 58, and an extension and an intercom are connected to the exchange 58, respectively. Here, between the extension and the exchange 58, a hook / DP detection circuit 60 for detecting an off-hook of the extension and a dial pulse, and an extension for the central line and the exchange 58.
There is provided a switch 62 for switching connection to any one of the above and a DC supply circuit 64 for supplying DC to the extension line. Also, between the extension and the exchange 58, a hook / DP detection circuit 66, a switch 68, and a DC supply circuit 70 are also provided, and a call to the intercom is detected between the intercom and the exchange 58. A DC supply / call detection circuit 72 for supplying DC to the doorphone line is provided.

On the other hand, between the 2-wire 4-wire circuit 52 and the office line, a switch for switching and connecting the output of the 2-wire 4-wire circuit 52 to the exchange 58 and the office line.
74 and CML / D that generates the dial pulse to be sent to the station line
A P transmission circuit 76 and a switch 78 for switching the office line between the two-wire four-wire circuit 52 side and the extension side are provided. Further, an incoming call from the station line is detected between the station line and the extension line. An incoming call detection circuit 80 is provided.

Further, the master device 10 has filters 82 and 84, a melody sending circuit 86 for sending a melody to the line, and a dial tone 40.
0Hz oscillator 88, 1 for ringing to extension or
A 6 Hz oscillator 90, a memory 92 for storing the calling operation mode and the like of the child device 12, and a CPU (parent) 94 that controls these and is connected to the CPU (RF) 54 are included. Also this CPU
The (parent) 94 controls the switching of the switches 62, 68, 74, 78.

In this master unit 10, when the power is off,
The switch 78 and the switch 62 directly connect the office line and the extension line, and a direct call is made between the station line and the extension line.

Further, when the extension or extension calls a station line in the power-on state of the master device 10, the extension or off hook is detected by the hook / DP detection circuit 60 or 66,
With this off-hook detection, the switch 62 or 68 and the switches 74 and 78 are switched under the control of the CPU (parent) 94,
The extension line or the office line is connected.

In addition, the slave unit includes a DTMF transmission circuit 96 according to the features of the present invention.
Also, the switch 98 is provided, while the master device 10 is also provided with the DTMF receiving circuit 100 according to the features of the present invention.

Next, a call operation of the station line by the slave 12 including the characteristic operation of the present invention will be described.

First, when the data terminal device 14 is a device that makes a call by a PB signal and the station line is PB, the PB signal supplied from the data terminal device 14 at the time of this call is a 4-line 2 line. It is transmitted from the antenna 30 to the base unit 10 via the line circuit 34 and the high frequency circuit 32. Prior to this, it is assumed that the CPU (child) 48 reserves an unused channel. In this case, the switch 98 is a 4-wire 2-wire circuit 34 under the control of the CPU (child) 48.
It has been pushed to the side. On the other hand, the base unit that received this PB signal
At 10, the CPU (RF) 54 detects a wireless incoming call in the high-frequency circuit 50, and the CPU (parent) 94 controls the switching of the switches 78 and 74. As a result of this switching control, the PB signal is transmitted to the office line via the high frequency circuit 50 and the two-wire four-wire circuit 52, so that the data terminal device 14 is connected to the office line by the PB signal.

Next, when the station line is DP, a call must be made to this station line by a DP signal. At this time, if the call from the data terminal device 14 is made by the PB signal, the station line does not accept the PB signal, and the data terminal device 14 is not connected to the station line. Therefore, in this case, the data terminal device 14 makes a call by the DP signal.

When a DP signal is issued from the data terminal device 14, this DP
The charging unit 26 performs DP detection on the signal. That is, the charging unit 26 detects that the signal supplied from the data terminal device 14 is the DP signal, and further informs the CPU (child) 48 of the detection result. The CPU
The (child) 48 switches the switch 98 according to the DP detection result.
The DTMF sending circuit 96 is controlled so as to be tilted to the side.

Further, in the DTMF sending circuit 96, the data terminal device
At each digit of the telephone number represented by the DP signal emitted from 14, DT
The PB belonging to the highest column of MF is added, and a DTMF signal corresponding to such a PB column is generated, and the high frequency circuit
Sent to 32.

For example, when a DP signal representing "1" is issued from the data terminal device 14, the CPU (child) 48 detects the DP signal in the charging unit 26 and the DP signal represents "1". Is notified. The CPU (child) 48
Supplies this information to the DTMF sending circuit 96, and the DTMF sending circuit 96 further adds, for example, "C" to this "1",
The DTMF signal of “C1” is output to the high frequency circuit 32.

The PB signal of "C", for example, will be described with reference to FIG.

FIG. 2 shows a PB configuration in DTMF (Dual Tone Multi Frequency).

In DTMF, as shown in Fig. 2, 4 of the high group
The frequencies f _H1 , f _H2 , f _H3 , f _H4 and the four frequencies of the low group f _L1 , f _L2 , f _L3 , f
_By combining with _L4 in a matrix,
Numeric keys "1" to "0", "*""#","A" ...
Either "D" is specified.

Usually, as the keypad 40 of the telephone, the rightmost column of the PB shown in FIG. 2 (the frequency of the high group is f _H4 (= 1633Hz))
Column), that is, the PB belonging to the highest column is not provided. That is, in the normal keypad 40,
Only the numeric keys "1" to "0" and "*" and "#" can be operated.

A feature of the present invention is that the PB belonging to this highest column, that is, any one of "A" to "D", is used when the DP signal of the data terminal device 14 is called.
The PB signal generated from the signal is added to each digit and transmitted. In the present embodiment, "C" among PBs belonging to these highest columns is added in advance to each digit PB corresponding to the DP signal transmitted from the data terminal device 14. In FIG. 1, the PB signal belonging to the highest column, for example, the PB signal added with “C” is the high frequency circuit 32.
And is transmitted to the base unit 10 from the antenna 30.

In the parent device 10, such a PB signal is input to the DTMF receiving circuit 100 via the 2-wire 4-wire circuit 52 and the exchange 58 after undergoing processing such as detection in the high frequency circuit 50. The DTMF receiving circuit 100 according to the feature of the present invention receives a PB signal in which "C" is added to each digit PB as described above, and "C" is added to each digit PB of the PB signal. To detect.

In response to this detection, the CPU (parent) 94 causes the CML / DP sending circuit 76 to output the DP output from the data terminal device 14.
Generate a DP signal corresponding to the signal and send it to the central office line.

Thus, in the cordless phone system of this embodiment, even when the office line is DP, the DP signal emitted from the data terminal device 14 belongs to the highest column of DTMF in each digit.
Converting to a PB signal with PB added, wirelessly relaying from the slave unit 12 to the master unit 10 and reproducing the DP signal at the master unit 10, the data terminal device 14 can call the station line with the DP signal. Becomes

In addition, even if the DP signal issued from the data terminal device 14 has a pause between digits (margin time between digits), the data in a short time can be obtained without erroneously recognizing the pause between digits and the end of the signal. It is possible to connect the terminal device 14 to the office line.

Further, when converting the DP signal to the PB signal, the PB belonging to the highest column added to each digit can be arbitrarily selected by the cordless phone system designer or the like, and the degree of freedom in design is maintained. be able to.

Further, no special operation is required for the operator of the data terminal device 14, and the use performance is maintained.

In addition, there are few configurations added to the conventional cordless phone system, and no special change is required in the control procedure.

With the device of this embodiment, when an ID matching service or the like is to be used, switching of the DP from the DP to the PB of the station line can be supported.

In the present embodiment, the data terminal device 14 is a charging unit.
It is connected to the cordless phone body 22 via 26,
The present invention is not limited to such connections.
For example, the data terminal device 14 may be connected by means such as acoustic coupling by the handset 20.
In addition, in the present embodiment, the extension 10 and the intercom other than the extension device 12 are connected to the extension device 10, but this connection is optional, and for example, only the extension device 12 is connected to the extension device 10. However, the other extension telephones may not be connected. In this case, the switch 78 and the like built in the parent device 10 are unnecessary.

[Effects of the Invention] As described above, according to the present invention, when a data terminal device connected to a child device calls a station line, even if the child device is a DP, the data terminal device is a DP. The signal enables the call to the local line.

Further, in the parent device, since the signal wirelessly supplied from the child device is only the PB signal, the detection operation in the parent device may be for only the PB signal, and the configuration is simple.

In addition, a structure for identifying the inter-digit pause and the end of the signal, for example, a timer is not required, which simplifies the structure.
Since the conventional cordless phone system is only partially modified in design, it is easy to design and manufacture. Also,
There is no particular change in the control procedure, and the conventional control procedure can be generally diverted.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a cordless phone system according to an embodiment of the present invention, and FIG. 2 is a PB configuration diagram showing a PB configuration of DTMF. 10 …… Main unit 12 …… Slave unit 14 …… Data terminal device 48 …… CPU (child) 94 …… CPU (parent) 96 …… DTMF sending circuit 98 …… Switch 100 …… DTMF receiving circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunihiko Katakura 5-1-1 Shimorenjaku, Mitaka-shi, Tokyo Within Japan Radio Co., Ltd. (72) Innovator Shin Ishizuka 5-1-1 1-1 Shimorenjaku, Mitaka-shi, Tokyo Japan Radio Incorporated (72) Inventor Hajime Wakabayashi 1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Nihon Telegraph Telephone Co., Ltd. (72) Inventor Seiichi Horigome 1-1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph Telephone Within the corporation (56) References JP 63-187849 (JP, A) JP 63-7069 (JP, A)

Claims (2)

[Claims] 1. In a cordless phone system in which a master unit connected to a central office line and a slave unit connected to a data terminal device are wirelessly connected, a DP signal emitted from the data terminal device is transmitted to the slave unit.
Convert it to a PB signal and relay it to the master unit.
In the PB corresponding to each digit of the telephone number represented by the signal, DT
A station line relaying method, which is performed by generating a DTMF signal corresponding to a PB sequence to which PBs belonging to the highest MF column are added. 2. A cordless phone system in which a master unit connected to an office line and a slave unit connected to a data terminal device are wirelessly connected to each other, wherein the slave unit receives a DP signal supplied from the data terminal device. , The PB corresponding to each digit of the telephone number represented by this DP signal corresponds to the PB string in which the PB belonging to the highest column of DTMF is added.
Includes a PB dialer that converts to a DTMF signal and sends it to the master unit as a PB signal, wherein the master unit is a PB signal sent from the PB dialer, and a PB belonging to the highest column in each digit is added to the DTMF signal. The PB detection circuit for detecting that the highest column is at each digit PB of the PB signal by the PB detection circuit.
When it is detected that PB is added, the PB signal is
A DTMF signal that includes a DP transmission circuit that converts the signal to a DP signal and transmits it to the office line. When the data terminal device makes a call with the DP signal, the PB belonging to the highest column is added to each digit of this DP signal The cordless phone system is characterized by converting the DTMF signal into a DP signal and transmitting the DTMF signal to the central office line.