JPH08186876A - Digital cordless telephone set and connection system therefor - Google Patents

Abstract

PURPOSE: To enable the automatic switch of a self-managing mode and a public mode and to preferentially connect the mode whose usage charge is inexpensive by providing a slave machine with a means performing a transmission operation by compulsorily switching a public mode to the self-managing mode at the time of a transmission and performing the transmission operation in the public mode when the connection with a master machine in the self-managing mode can not be performed. CONSTITUTION: When a key operation part 8 is operated and a transmission signal is inputted in a control part 7 through an LCD/key input control part 5 when a slave machine is switched and set to a public mode, the slave machine is unconditionally switched to the self-managing mode. At the same time, a timer 10 is instructed to set maximum reception time and start time timing, CS-ID for self-managing and other necessary information are read from a memory 9, a radio part 1 and a base band part 2 are instructed to receive the control signals including the CS-ID for self- managing, and a reception state is made. When the connection with the master machine in the mode for self-managing can not be performed, the transmission operation by the public mode is made possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital cordless telephone, and more particularly to a telephone for wirelessly transmitting or receiving data to or from a base station connected to a public line and a base unit connected to a private line. The present invention relates to a connectable digital telephone and its connection method.

[0002]

2. Description of the Related Art Conventionally, a digital cordless telephone is composed of a master unit connected to a private line and a slave unit connected to the master unit. It is possible to wirelessly connect to the base unit and send and receive voices and the like. The use of the child device in this case is called use in the self-employed mode. In addition, the slave unit can also transmit and receive voice and the like to and from the base station connected to the public line within the connectable area of the base station as in the case of the master unit. The use of the child device in this case is referred to as public mode use. Therefore,
Normally, it is used as a self-employed terminal that is connected to the base unit at home, and when the user goes out, the handset can be used as a public terminal.

Therefore, when the base station is installed near the house where the base unit is installed, there is an area where the connectable area of the base unit and the connectable area of the base station overlap with each other. In, the slave unit can be connected to either the base station or the master unit. In this case, whether to connect to the base station to use as a public slave or to connect to the master to use as a self-employed slave is set by switching the key on the slave, etc. When it is set to the public mode to connect to the base station, it is not possible to connect to the base unit. Conversely, when it is set to the self-employed mode to connect to the base unit, it is said that it cannot connect to the base station. .

[0004]

As described above, in the conventional slave unit, since the use modes for public use and private use are set by the key operation etc., the telephone must be selected unless the operation mode is properly set. There may be a disadvantage in terms of usage fees. For example, if there is a telephone in an area where the area that can be connected to the base station and the area that can be connected to the base unit overlap as described above, the operation mode can be changed even though the telephone can be used in the self-employed mode. When set to public mode,
Unconditionally connected to the base station and set to public mode. Currently, telephone charges for private lines are set lower than those for public lines. In this case, calls are made in high-priced public mode, and low-priced private mode is used. If you do, a high usage fee will be charged.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a digital cordless telephone capable of automatically switching between a self-employed mode and a public mode, and preferentially setting one of the modes, and a connection method therefor. Especially.

[0006]

In the digital cordless telephone of the present invention, when it is set to be switched to the self-employed mode, the public mode is forcibly switched to the self-employed mode when the call is made, and the call operation is performed. It is characterized in that it is provided with means for carrying out a calling operation in the public mode when it is not possible to connect to the parent device.

For example, a control means for detecting an operation mode set when a transmission command is received, and unconditionally switching to a self-employed mode in the case of a public mode, and a control signal from a base unit or a base station are received. Means for measuring the control signal so that the receiving operation of the control signal is performed only for a predetermined time, and a connecting operation to the master unit or the base station when the control signal is received until the time period ends. And a function of switching the slave unit to the public mode when the connection operation in the self-employed mode is not performed.

Further, in the connection method of the digital cordless telephone of the present invention, the public mode is forcibly switched to the self-employed mode at the time of making a call, and the reception of the control signal from the master unit is started, and at the same time, the timing of a predetermined time is started, When the control signal from the base station is received, it connects to the master station in the self-employed mode, and if it cannot connect to the master station after a predetermined time, it switches to the public mode and the control signal from the base station is transmitted. It is characterized in that the reception of the control signal from the base station is started at the same time as the reception of the control signal from the base station, and the base station is connected in the public mode.

In this case, when the connection in the public mode is not possible, the function of stopping the calling operation after measuring a predetermined time is provided.

[0010]

[Function] When the cordless handset is located in an area where the connectable area of the base station connected to the public line and the connectable area of the master unit connected to the private line overlap, the cordless handset When the public mode is set, when the call is made, the public mode is forcibly switched to the self-employed mode and the reception of the control signal from the master unit is started, and at the same time, the time measurement for a predetermined time is started and the control from the master unit is started. When it receives a signal, it connects to the base unit in a self-employed mode, enabling calls over low-cost lines.

Further, when connection to the base unit is not possible even after a lapse of a predetermined time, the mode is switched to the public mode, the reception of the control signal from the base station is started, and at the same time, the time measurement of the predetermined time is started and When the control signal is received, the call is secured by connecting to the base station in the public mode.

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the internal configuration of a slave unit of the digital cordless telephone of the present invention. The slave unit includes a wireless unit 1, a baseband unit 2, a speaker 3, a microphone 4, and an LCD.
The key input control unit 5, the LCD 6, the control unit 7, the key operation unit 8, the memory 9, the timer 10, and the antenna 11 are included.

The radio section 1 converts the signal input from the baseband section 2 into a radio transmission frequency, amplifies the signal and transmits it from the antenna 11. Also, the signal received by the antenna 11 is converted into a baseband frequency and output to the baseband unit 2. The baseband unit 2 is a modulation / demodulation circuit, T
It is equipped with a DMA / TDD processing circuit and a voice encoding circuit, and processes a baseband signal. The speaker 3 outputs the received audio signal, and the microphone 4 inputs the audio signal. LCD
The key input control unit 5 outputs the dial number or the like input from the key operation unit 8 to the LCD 6, and the LCD 6 displays according to the data input from the LCD / key input control unit 5.

The memory 9 has a CS-ID of the base unit and a C-ID of the base station.
The S-ID, the operation mode of the child device, and other information are stored. The timer 10 sets the maximum reception signal of the control signal and measures the time. A signal is output to the control unit when the time measurement ends.

The control unit 7 takes in the input data from the key operation unit 8 through the LCD / key input control unit 5, and displays the key input data and other data on the LCD 6. In addition to this, setting of the timer 10, start of clocking, detection of clocking end, writing of data to the memory 9,
Readout, control of the wireless unit 1 and the baseband unit 2, switching of operation modes, transmission / reception, and connection processing are performed.

FIG. 2 is a system configuration diagram of the digital cordless telephone of the present invention. The base station A is connected to the public line 21, constitutes a base station connectable area E1, and the base unit B
Is connected to the private line 22 and constitutes a master unit connectable area E2. Then, the base station connectable area E1 and the base unit connectable area E2 partially overlap, and the handset C existing in the overlapped area E3 can be connected to both the base station A and the base unit B. There is. In this case, it goes without saying that by switching the operation mode of the child device C to the public mode or the self-employed mode, the connection in the switched mode is performed.

FIG. 3 is a flow chart showing the connecting operation of the handset C according to the present invention. The handset C has at least one of the base connectable area E1 and the base connectable area E2 (both areas overlap). The case where a call is made when the user is located in E3 (including the area) is shown.

First, when the slave unit C is set to be switched to the public mode by a mode switching key or the like, the key operation unit 8
Is operated and a transmission signal is input to the control unit 7 through the LCD / key input control unit 5 (step S11, the same applies hereinafter), the handset C is unconditionally switched to the self-employed mode (S1).
2). At the same time, the timer 10 is instructed to set the maximum reception time and to start time counting, and the memory 9 is used to operate the self-employed C
The S-ID and other necessary information are read, and the wireless unit 1,
The baseband unit 2 is instructed to receive the control signal including the self-employed CS-ID (S13), and the receiving state is set (S1).
4).

Then, the reception of the control signal is checked (S
15) When the slave C is present in the master unit connectable area E2, the control signal including the private CS-ID can be normally received, so that the private line 22 is used in the private mode. Call connection processing is performed (S16). As a result, even though the handset C is set to the public mode, the call in the self-employed mode becomes possible (S17). Therefore, even when the handset C is located in the area E3 where the base station connectable area E1 and the base station connectable area E2 overlap, the call is connected to the private line 22 without being connected to the public line. It becomes possible, and it becomes a call at a low charge.

On the other hand, if the control signal including the self-employed CS-ID cannot be received before the timer 10 finishes measuring time (S18), the control unit 7 switches the slave unit C to the public mode (S19), and again. The timer 10 is instructed to set the maximum reception time and start time counting, and the public CS
-The ID and other necessary information are read, and the wireless unit 1 and the baseband unit 2 are instructed to receive the control signal including the public CS-IC (S20), and the receiving state is set (S2).
1). Then, the reception of the control signal is checked (S2
2) When the handset C is present in the base station connectable area E1, the control signal including the public CS-ID can be received, and therefore the call in the public mode using the public line 21 is performed. Connection processing is performed (S23). Therefore, the call in the public mode is made only when the call in the self-employed mode cannot be performed (S24).

If the control signal including the public CS-ID cannot be received before the timer 10 finishes measuring the time (S25), the originating operation is stopped (S2).
6).

When the handset C is in the self-employed mode from the beginning, as shown in FIG. 4, when a call is made in the self-employed mode (S31), the self-employment CS-ID and other information are stored in the memory. The necessary information is read, the wireless unit 1 and the baseband unit 2 are instructed to receive the control signal including the self-employed CS-ID, and at the same time, the timer 10 starts timing (S3).
2), the reception state is set (S33). And self-employed CS
-The control signal including the ID is checked (S34), and if the control signal is received, the call connection process is performed (S35), and the call state is set (S36). Further, if the control signal including the self-employed CS-ID cannot be received even after the timer 10 has finished measuring time (S37), the transmission operation is stopped (S3).
8).

Alternatively, when the self-employed mode is set, the time counting operation by the timer may be stopped and the calling operation may be continued until the user stops the calling operation by a key operation.

In the above-mentioned embodiment, the call connection between the slave unit and the master unit or the base station is described as an example. The call connection here means a line connection for data transmission / reception using a facsimile or a computer. It goes without saying that it includes connections.

[0025]

As described above, the present invention forcibly switches the public mode to the self-employed mode when the call is set to switch to the self-employed mode, and performs the outgoing operation.
By providing a means to make a call operation in public mode when it is not possible to connect to the base unit in the self-employed mode, even if the handset is set to the public mode, the call connection in the self-employed mode is given priority. When the control signal from the base unit is received in this operation, the base unit can be connected in the self-employed mode, so the connection in the public mode is avoided and the usage fee is low. You can make calls on your own line and reduce usage fees.

Further, when the connection to the master unit cannot be established even after the lapse of a predetermined time, the mode is switched to the public mode, the reception of the control signal from the base station is started, and at the same time, the clocking of the predetermined time is started, and When the control signal is received, the base station is connected to the base station in the public mode so that the user can connect to the intended other party and secure the call.

Further, in the digital cordless telephone connection system of the present invention, the public mode is forcibly switched to the self-employed mode at the time of call origination, and at the same time when the control signal from the parent device is started, the timing of a predetermined time is started, When the control signal from the base station is received, it connects to the master station in the self-employed mode, and if it cannot connect to the master station after a predetermined time, it switches to the public mode and the control signal from the base station is transmitted. At the same time when reception is started, a predetermined time is started, and when a control signal from the base station is received, the base station is connected in the public mode to give priority to the connection in the self-employed mode, When the connection cannot be established, the connection is made in the public mode for the first time, and it becomes possible to secure the reliable connection while reducing the usage fee.

[Brief description of drawings]

FIG. 1 is a block diagram showing an internal configuration of a digital cordless telephone of the present invention.

FIG. 2 is a call system diagram of the telephone of the present invention.

FIG. 3 is a flowchart showing a calling operation in public mode in the telephone of the present invention.

FIG. 4 is a flowchart showing a calling operation in a self-employed mode in the telephone of the present invention.

[Explanation of symbols]

 1 wireless unit 2 baseband unit 5 LCD / key input control unit 6 LCD 7 control unit 8 key operation unit 9 memory 10 timer 21 public line 22 private line A base station B base unit C slave unit E1 base station connectable area E2 Base unit connectable area E3 Common connection area

Claims (4)

[Claims] 1. A base station connected to a public line, a base unit connected to a private line, and a public mode for the base station or a self-employed base unit depending on a switching setting. In a digital cordless telephone including a handset that can be selectively wirelessly connected in each mode, the handset forcibly switches the public mode to the self-employed mode when making a call, and performs a call operation to the master unit in the self-employed mode. A digital cordless telephone, which is provided with means for performing a calling operation in a public mode when the connection with the above is not possible. 2. The slave unit detects the operation mode set in the slave unit when receiving a call command, and unconditionally switches to the self-employed mode in the public mode, and the master unit or the base station. Means for receiving a control signal from the station, means for timing the reception operation of the control signal only for a predetermined time, and a master unit or a master unit when the control signal is received before the timing time ends. A digital cordless telephone, comprising means for performing a connection operation to a base station, and the control means having a function of switching a slave unit to a public mode when a connection operation in a self-employed mode is not performed. 3. A base station connected to a public line, a master unit connected to a private line, and a public mode for the base station or a private unit for the master unit depending on a switching setting. In a digital cordless telephone including a handset that can be selectively connected wirelessly in each mode, the handset forcibly switches the public mode to the self-employed mode at the time of calling and at the same time starts receiving a control signal from the base unit. Starts time measurement for a predetermined time, connects to the master unit in the self-employed mode when receiving a control signal from the master unit, and switches to the public mode when the connection to the master unit cannot be established even after the predetermined time has elapsed. It is characterized in that switching is started, reception of a control signal from the base station is started, and timing of a predetermined time is started at the same time, and when the control signal from the base station is received, the base station is connected in a public mode. A connection method for a digital cordless telephone. 4. When the connection in the public mode is not possible, the calling operation is stopped after a predetermined time is counted.
Digital cordless telephone connection method.