JPH08195979A - Portable telephone system - Google Patents

Abstract

PURPOSE: To reduce the registration number of public ID numbers and to perform communication from any radio slave unit through a public base station by transmitting and registering the public ID number registered in the memory of the main unit of a master unit into the memory of the radio slave unit and eliminating it from the memory of the master unit. CONSTITUTION: At the time of going out with a radio slave unit 7, the public ID number registered in the EEPROM 15 of the main unit 1 of the master unit 6 is transmitted from the master unit 6, registered in the EEPROM of the slave unit 1 and eliminated from the ROM 15 corresponding to a request from the slave unit 7. The state is recovered based on the request from the slave unit 7 after coming home. By the constitution, the registration number is minimized without registering the public ID number in the radio salve unit beforehand, a basic charge is reduced and the communication is performed in any radio slave unit through the public base station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone system comprising a plurality of wireless slave units and a master unit accommodating each wireless slave unit and a plurality of outside lines.

[0002]

2. Description of the Related Art In recent years, a call service by PHS (Personal Handy Phone System; hereinafter referred to as a mobile phone system) has been started. This mobile phone system is a system that is installed in a general house, an office, or the like, and includes a master device connected to a telephone line and a plurality of wireless slave devices wirelessly connected to the master device. In such a mobile phone system, when an incoming call arrives at a telephone line (hereinafter referred to as an outside line) accommodated in the parent device, the parent device wirelessly calls the wireless slave device. At this time, when a predetermined response operation is performed on the wireless slave device side, the master device side responds to the external line incoming call and connects the external line and the wireless slave device by connecting the call path to the incoming call response call by the wireless slave device. Is done. Also, when a predetermined external line transmission operation is performed on the wireless slave device side, the master device side detects this and captures the external line, and after connecting the call path between the captured external line and the wireless slave device, dials the captured external line. Send a signal. As a result, the call of the other party is made, and the outside call of the wireless slave device is made according to the response of the other party.

By the way, a self-employed ID number unique to the system is registered in each wireless slave unit and master unit. This self-employed ID number is composed of a common number common to the system and an extension number for calling an extension which is different for each wireless slave device, and when each wireless slave device makes an external call via the master device, Calling is allowed only when the common numbers stored in the master device and each wireless slave device match. Also, in the case of an external line incoming, the call is made only to the slave unit having the same common number. The extension call within the system is made based on the above-mentioned extension number. On the other hand, if each wireless slave device is contracted with a predetermined telephone service company, the contracted wireless slave device is carried in the city and other than the parent device to which it belongs (that is, the parent device having the same self-employment ID number). You can also make calls freely via the nearest public base station. In consideration of this, a plurality of public ID numbers given by the contracted telephone service company can be registered in the wireless slave device.

[0004]

As described above, in this type of mobile phone system, each wireless slave device can register not only its own ID number but also a public ID number that can be transmitted via a public base station. It is possible to talk freely in the city via a public base station other than the parent device to which it belongs. Normally, when such a public ID number is registered in a wireless slave device contracted with a telephone service company, the user pays a fixed basic charge to the telephone service company regardless of whether or not the wireless slave device is used. Have to pay. For this reason, when a general user wants to make a call via a public base station by a wireless slave device, considering the payment of the basic charge and the frequency of use, etc. It seems that only the machine will be selected and contracted.

If the required number of wireless slave units are contracted with the telephone service company in this way, when the user of the first wireless slave unit whose public ID number is not registered goes out and calls via the public base station. Cannot use its own wireless slave device, and therefore borrows the second wireless slave device from the user of the second wireless slave device whose ID number is registered. On the other hand, since the extension call in the system is made based on the extension number which is different for each of the above-mentioned wireless slave devices forming the self-employed ID number registered in each wireless slave device, the second wireless slave device is borrowed. If a third party makes an extension call to the original user (lender) of the second wireless slave device while being carried out, the original user will not be able to go out and go to the place. There is a problem that it is impossible to make a call despite being there. Therefore, the present invention aims to reduce the basic fee paid to the telephone service company by registering the minimum necessary number of public ID numbers capable of making a call via a public base station, and
It is an object of the present invention to enable a telephone call via a public base station in any wireless slave device.

[0006]

In order to solve such a problem, the present invention provides a parent device (in the embodiment, a main device 1 and a parent device 6) accommodating a plurality of external lines, and a parent device. In a mobile phone system including a plurality of wireless slave devices wirelessly connected to the device, and an ID number for making an outside line call is registered in the first memory of each wireless slave device, a predetermined number is preset in the parent device. Second memory for registering the public ID number of
And a means for transmitting the public ID number of the second memory to the public ID number acquisition request from the wireless slave device carried when going out, and for deleting the transmitted public ID number from the second memory. Further, an acquisition operation detecting means for detecting an acquisition operation for acquiring the public ID number to the wireless slave device, and a means for requesting the parent device to acquire the public ID number according to the detection output of the acquisition operation detecting means. A registration unit for registering the public ID number transmitted from the parent device in the first memory in response to the acquisition request for the public ID number is provided.

Further, a return operation detecting means for detecting a return operation for returning the public ID number to the wireless slave device, and a public ID registered in the first memory according to the detection output of the return operation detecting means. Means for transmitting the number to the parent device and erasing the transmitted public ID number from the first memory, and the public device I transmitted to the parent device from the wireless slave device.
A means for receiving the D number and registering it in the second memory is provided. Further, the parent device is provided with a third memory for storing call record data using the public ID number transmitted together with the public ID number from the wireless slave device based on the return operation of the wireless slave device. is there.

[0008]

The public ID number registered in the second memory of the parent device is transmitted to the wireless slave unit carried when going out to be registered in the first memory of the wireless slave unit and transmitted to the wireless slave unit. The ID number for use is erased from the second memory. As a result,
If the minimum required public ID number for the system is registered in the parent device, calls will be made through the public base station of each wireless slave device without excess or deficiency. Therefore, the basic fee paid to the telephone service company. Etc. can be reduced. Also,
When a user of a wireless slave device wirelessly connected to the parent device wants to make a call via a public base station, the public ID number is given from the parent device to the wireless slave device used by the parent device. It becomes possible to freely make a call via the public base station using the wireless slave device, and therefore, it becomes unnecessary to borrow another person's wireless slave device when making a call via the public base station. It is possible to avoid the problem that the extension of the wireless slave device cannot be called to the lender of the wireless slave device while the device is rented.

When the wireless slave unit returns the public ID number when returning home from the home, the wireless slave unit transmits the public ID number registered in the first memory to the parent device. Public ID registered and sent in memory 2
Erase the number from the first memory. As a result, when returning home, the public ID number is always returned to the parent device side, and a person who goes out newly registers the returned public ID number in a new wireless cordless handset for himself / herself. Calls can be made at public base stations. When the return operation is performed by the wireless slave device, the wireless slave device transmits the call record data together with the public ID number and stores the call record data in the third memory of the parent device. As a result, it is possible to centrally manage the record data such as the call charge of each wireless cordless handset while going out by the parent device side.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a mobile phone system according to the present invention. This system includes a plurality of outside lines 3
A main device 1 accommodating _{1 to} 3 _n , a plurality of key telephones 5 connected to the main device 1, and a master device 6 connected to the main device 1.
And a wireless slave device 7 wirelessly connected to the master device 6.

In FIG. 1, the main device 1 includes external wires 3 ₁ ...
External line interface 11 ₁ which is an interface of 3 _n
11 _n , a call path switch 12, a telephone interface 13 which is an interface of the key telephone 5, a mobile telephone interface 14 which is an interface of the master device 6,
EEPROM15, CPU16, R for storing ID number
It is composed of an OM 17, a RAM 18, and the like. Also, the key telephone 5 includes a call circuit 51, a transmission circuit 54, and a control unit 5.
5, a display circuit 56, a keyboard 57 for accommodating dial keys and the like.

In the system configured as described above, in the main unit 1, as is well known, the operation data which is operated by each key telephone 5 and transmitted from each telephone is received, and the outside line transmission corresponding to the operation data is transmitted. Also, switching connection processing such as call control such as call control for extension calls and the like, and call control for notifying an incoming call to each key telephone by detecting an incoming call coming from each outside line is performed. In the main device 1, the same control as that for each key telephone is also performed for the wireless slave device 7 via the master device 6.

Here, in the wireless communication between the master unit 6 and the wireless slave unit 7, one frame of data is divided into eight time slots, and time division wireless communication is performed through each of the divided time slots. . Of the time slots, 4 times the transmission time slot from the master device 6 to each wireless slave device.
One slot is allocated, and the remaining four time slots are allocated to transmission time slots (reception time slots for master device 6) from each wireless slave device to master device 6. Therefore, if all 8 slots of one frame are used, the master device 6 can perform wireless communication simultaneously with the four wireless slave devices.

FIG. 2 is a block diagram showing the configuration of such a base unit 6. In the figure, the master device 6 is configured as follows. That is, 61 is a wireless transmission / reception unit that performs wireless communication with each wireless slave unit via the antenna AT1, 62 is a modem demodulator that demodulates a digital audio signal or the like from the signals received by the wireless transmission / reception unit 61, and 63 is a demodulated signal. A channel codec for extracting a signal of a designated time slot from the inside, and 64 for converting the digital audio signal extracted by the channel codec 63 into an analog signal and the main unit 1
It is a voice codec that converts a voice signal transmitted from the side into a digital signal and outputs the digital signal.

Further, 65 outputs an analog signal from the voice codec 64 to the main device 1 side and outputs a voice signal from the main device 1 side to the voice codec 64, and
The data signal transmitted / received to / from the main unit 1 is a CPU described later.
68 is a main device interface, 66 is a channel codec for extracting a signal of a designated time slot from the digital audio signal from the main device 1 side via the audio codec 64, 67 is a digital signal from the channel codec 66 A modem modulator that modulates the signal and outputs it to the wireless transmission / reception unit 61;
It is PU.

Each unit of the base unit 6 configured as described above operates as follows. First, when a wireless signal of, for example, a frequency of 1.9 GHz from each wireless slave device is input to the wireless transmission / reception unit 61 via the antenna AT1, the wireless transmission / reception unit 61 amplifies the wireless signal, and further the amplified signal is The signal is output to the modem demodulator 62 as a signal in a predetermined frequency band. This signal is demodulated by the modem demodulator 62, and the demodulated signal of the designated slot is extracted by the channel codec 63. Then, the extracted signal is a voice codec 6
At 4, the signal is converted into an analog voice signal and sent to the main device 1 side via the call line corresponding to the corresponding wireless slave device in the main device interface 65. The data signal extracted by the channel codec is given to the CPU 68, and in this case, the CPU 68 transmits this data signal to the main device 1 side via the signal line corresponding to the corresponding wireless slave device in the main device interface 65. .

On the other hand, the voice signal from the main unit 1 side via the communication line in the main unit interface 65 is converted into a digital signal by the voice codec 64, and the signal of the designated slot is extracted by the channel codec 66. The data is modulated by the modem modulator 67 and sent to the wireless transmission / reception unit 61. In the wireless transmission / reception unit 61, this input signal is converted into a signal in the frequency band of 1.9 GHz, amplified, and transmitted as a wireless signal to the wireless slave device side. At this time, the control data from the main device 1 side is given to the CPU 68 via the signal line in the main device interface 65, and the CPU 68 superimposes this control data on the wireless signal output from the wireless transmission / reception unit 61 to perform wireless communication. Send to the handset side.

Next, FIG. 3 is a block diagram showing the structure of the wireless slave device 7, and the structure of the wireless slave device 7 is substantially the same as that of the master device 6. That is, the wireless slave device 7 has a wireless function having the same functions as those of the wireless transceiver unit 61, the modem demodulator 62, the channel codecs 63 and 66, the voice codec 64, and the modem modulator 67 of the master unit 6 shown in FIG. Transmitter / receiver 71, modem demodulator 72, channel codec 7
3, 76, a voice codec 74, and a modem modulator 77 are provided respectively. The difference from the configuration of the base unit 6 is that a CPU 78 for controlling the wireless slave unit 7 is connected with a keyboard 79, an EEPROM 80 for storing an ID number, and an out / home switch 81 for switching between going out and going home. The voice codec 74 and the speaker 82
And the microphone 83 is connected.

In the wireless slave device 7 thus constructed, C
The PU 78 detects from the control data demodulated by the modem demodulator 72 and extracted by the channel codec 73 whether or not a predetermined signal in the wireless signal (transmission burst signal) from the base unit 6 is information addressed to itself. To do. If the information is addressed to itself, each signal in this transmission burst is received, and this time is set as its own reception time slot. Then, the fourth time slot from the time slot next to this reception time slot is defined as its own transmission time slot, and a synchronization burst signal is transmitted via this transmission time slot to form a radio link. After that, the control data such as the operation information of the keyboard 79 or the voice signal from the microphone 83 is superimposed on the wireless signal output from the wireless transmitting / receiving unit 71 through the transmission time slot, and the master device 6
Send to the side.

By the way, the EEPROM 80 of the main unit 1 is used as the above-mentioned EEPROM 80 of the wireless slave unit 7 for wireless communication.
The same self-employed (at home) ID number as the ID number registered in 15 is registered. Then, when the wireless slave device 7 and the main device 1 communicate with each other via the master device 6, by transmitting their own ID numbers to the other party, the respective ID numbers of the other party and their own are collated with each other. When the numbers match with each other, outgoing / incoming calls from the outside line via the main unit 1 are permitted.

That is, in the wireless slave device 7, the keyboard 7
When the "call key" and "dial key" in 9 are sequentially operated, the CPU 78 sends the operated dialing information of the destination and the self-employed ID number registered in the EEPROM 80 via the wireless transmission / reception unit 71 and the antenna AT2. And transmits it to the base unit 6 as a wireless signal. When the base unit 6 receives this wireless signal, it transmits it as a wired signal to the main unit 1 via the main unit interface 65. In this case, the CPU of the main device 1
16 extracts the private ID number from this wired signal and determines whether this number matches the one registered in the EEPROM 15. If both numbers match, the vacant outside line is captured, and the call path switch 12 is controlled to set the communication path between the captured outside line and the wireless slave device 7, and the master device 6 is controlled. The wireless communication channel is set, and the dial information in the received wired signal is sent as a dial signal to the captured outside line. As a result,
The other party is called and the wireless slave unit 7
An outside line outgoing call is made via the main device 1.

When an incoming call arrives at an outside line, the main unit 1 sends an incoming call notification to the key telephone 5 side and also sends an incoming call notification to the master unit 6 side via the mobile phone interface 14. In addition, when notifying the incoming call to the base unit 6 side,
The self-employed ID number registered in the EEPROM 15 is also notified. Then, the base unit 6 transmits the incoming data and the self-employed ID number to the wireless handset side as a wireless signal. In this case, the CPU 78 of the wireless slave unit takes out the self-employed ID number from the radio signal and collates it with the self-employed ID number registered in the EEPROM 80. If they match, a ringing tone is sounded to notify the outside line incoming.

When the "call key" on the keyboard 79 is operated in response to the incoming call notification, the CPU 78 transmits a wireless response signal to the base unit 6 via the wireless transmission / reception unit 71. This response signal is sent to the main unit 1 via the base unit 6, and in this case, the CPU 16 of the main unit 1 captures the incoming call outside line and responds to the incoming call, and controls the call path switch 12 to catch the outside line. And set the communication path between the wireless handset 7 and
Further, the base unit 6 is controlled to set the wireless communication channel. As a result, an outside line incoming call is made via the main device 1 of the wireless slave device 7. Thus, only when the self-employed ID numbers registered in the main device 1 and the wireless slave device 7 match, the outside line call through the main device 1 of the wireless slave device 7 is permitted. This self-employed ID number consists of a common number that is common in the system that is referred to when determining whether outgoing / incoming calls are permitted on the outside line, and an extension number that is different for each wireless cordless handset. At times, an extension call is made to the wireless slave device based on this extension number.

By the way, the EEP of such a wireless slave unit 7
If each public ID number contracted with each telephone service company is registered in the ROM 80 in advance, it becomes possible to carry the telephone freely with the other party through the nearest public base station. However, if a public ID number is registered in the wireless slave device 7, a fixed basic charge must be paid to the telephone service company regardless of whether the public ID number is used. For this reason,
It is conceivable to register public IDs in the required number of wireless slave devices. However, if the public IDs are registered in the required number of wireless slave devices, the public IDs are not registered. When the user of the wireless slave device makes a call via the public base station, the wireless slaves with this ID are registered. However, there is a problem that the extension cannot be called to the lender of the corresponding wireless slave device during this period. Therefore, the main device 1 manages the number of wireless slave devices to which a public ID number is assigned, and the main device 1 can register this ID number for a wireless slave device that makes a call via a public base station. By doing so, it is possible to avoid the above-mentioned problems and reduce the charges paid to the telephone service company.

FIGS. 4 and 5 are flowcharts showing the main part of the present invention. The operation of the main unit 1 for giving a public ID number to the wireless slave unit 7 and the wireless unit responding to the operation of the main unit 1 are described. The operation of the machine 7 is shown. First, wireless cordless handset 7
The operation will be described. When the out-home / home-going switch 81 of the wireless slave device 7 which is carried when going out is operated and switched to the out-going side, the determination of "going out" in step S1 of FIG. 4A becomes "Y". In this case, the CPU 7 of the wireless slave device 7
8 forms a wireless link with the base unit 6 in step S2, and transmits the ID number acquisition request data to the base unit 6 in step S3 via the transmission time slot assigned to itself.
The main device 1 is requested to acquire a public ID number.

In response to such a public ID number acquisition request for the wireless slave unit 7, the main unit 1 sends each public ID number registered in the EEPROM 15 (second memory) via the master unit 6. It will be transmitted to the wireless slave device 7 side. In step S4, the reception of this ID number is determined. When the ID number is received, in step S5 the EE of this received ID number is received.
Judge that the PROM80 (first memory) has been stored,
If the received ID number is not already stored in the EEPROM 80, the received ID number is stored in the CPU 78 in step S6.
Temporarily write to the internal memory of.

Then, the temporarily written reception ID number is returned to the main unit 1 via the master unit 6 in step S7. In response to the transmission of the received ID number to the main unit 1, the main unit 1 erases the corresponding ID number from the EEPROM as described later, and sends the erase notification to the wireless slave device 7. Step S
In 8, it is determined whether or not the deletion notification is received. When the deletion notification is received, the CPU 78 reads the corresponding ID number temporarily written in the built-in memory, and the EE is read in step S9.
The main writing is performed and registered in the PROM 80.

Next, the operation of the CPU 16 of the main unit 1 which responds to the operation of the wireless slave unit 7 will be described with reference to the flowchart of FIG. 4 (b). First, in step S11, it is determined whether or not there is a public ID number acquisition request from the wireless slave device 7, and there is an ID number acquisition request.
Public ID that can be registered in the wireless slave device 7 in the EPROM 15
If the number remains, it is EEPROM in step S12.
A plurality of ID numbers corresponding to each telephone service company are read from 15 and transmitted to the corresponding wireless slave device via the master device 6. In response to the transmission of such an ID number, the wireless slave device side temporarily writes this ID number in the built-in memory and returns this ID number to the main device side as described above.

In this case, when the CPU 16 receives this ID number returned from the wireless slave unit side in step S13,
After confirming that it matches the one sent to the applicable handset,
In step S14, the corresponding ID number is erased from the EEPROM 15. Then, thereafter, in step S15, the corresponding wireless slave device is notified that the corresponding ID number has been deleted. As a result, this ID number is stored in the EEPROM
Registered at 80. When the user goes out with each wireless slave device in this manner, the public ID number is registered on the corresponding wireless slave device side and is erased on the main device 1 side. When a publicly assigned number of each public ID number is given to each wireless slave device and all public ID numbers registered in the main device 1 side are erased, a new wireless slave device is used for going out. However, the public ID number is not registered on the side of the wireless slave device. In this way, a plurality of public ID numbers are assigned to the wireless slave device 7.
When registered to, this wireless cordless handset 7 will be carried while you are out,
An outside call is made through the nearest public base station.

That is, in the wireless slave device 7, the keyboard 7
When the "call key" and the "dial key" in 9 are sequentially operated, the CPU 78 sends the operated dialing information of the destination and the public ID number registered in the EEPROM 80 via the wireless transmission / reception unit 71 and the antenna AT2. And transmits it as a radio signal to the public base station. When the public base station receives this wireless signal, the public ID is sent from this wireless signal.
The number is taken out and it is judged whether or not this number is provided by the telephone service company. When both numbers match, a wireless communication channel with the wireless slave device 7 is formed to allow the wireless slave device 7 to talk through the public base station, and the dial information in the received wireless signal is set. It is sent to the public line as a dial signal. As a result, the other party is called, and an outside line call is made via the public base station of the wireless slave device 7 according to the response of the other party. Then, during an outside line call, the wireless handset 7 receives a billing signal by a wireless signal coming from the public base station side to calculate a call charge,
Store in internal memory. After that, when returning from home or returning from the office and performing a predetermined operation of the wireless slave device 7 carried while out, the public ID number of the wireless slave device 7 is returned to the main device 1 side, and at that time The used call charge data is also transmitted to and stored in the main device 1.

FIG. 5 is a flowchart showing the operations of the wireless slave device 7 and the main device 1 when returning home (returning to the office). When the go-away / return-home switch 81 of the wireless slave device 7 is operated to switch to the return-home side, the determination of "return-home operation" in step S21 of FIG. 5A becomes "Y". In this case, the CPU 78 of the wireless slave device 7 forms a wireless link with the master device 6 in step S22. Then, the usage record data such as a plurality of public ID numbers registered in the EEPROM 80 and the call charge stored in the built-in memory are read out, and the read-out data are mainly transmitted through their own transmission time slots in step S23. Send to device 1.

In response to the transmission of such an ID number or the like, the main device 1 side temporarily writes this ID number in the RAM 18 and returns this ID number to the wireless slave device 7 side, as will be described later. In this case, when the CPU 78 receives this ID number returned from the main device side in step S24, it confirms that this number matches the one transmitted to the main device 1,
In step S25, the corresponding ID number is erased from the EEPROM 80. After that, the main device 1 is notified in step S26 that the corresponding ID number has been deleted. As a result,
This ID number is re-registered in the EEPROM 15 on the main unit side.

Next, the operation of the main unit 1 which responds to the operation of the wireless slave unit 7 will be described with reference to the flowchart of FIG. 5B. First, in step S31, the CPU 16
Determines whether each public ID number and usage record data returned from the wireless slave device 7 has been received. If these data are received, the received ID number is already EEPR.
If it is determined to be "N" in step S32 after determining whether or not it is stored in the OM 15, the reception ID number is temporarily written in the RAM 18 in step S33, and the received usage record data such as the call charge is received in step S34. And RAM
The data is stored in 18 separate areas (third memory).

Then, the temporarily written reception ID number is returned to the corresponding wireless slave device via the master device 6 in step S35.
In response to the transmission of such a reception ID number to the wireless slave device, the wireless slave device sets the corresponding ID number to the EEPROM 8 as described above.
It erases from 0 and sends the erase notification to the main device 1. C
In step S36, the PU 16 determines whether or not the deletion notification is received. When the deletion notification is received, the PU 16 reads the corresponding ID number temporarily written in the RAM 18 and then in step S36.
At 37, main writing is performed in the EEPROM 15 and re-registration is performed. In this way, when the user returns home from the wireless handset 7 carried out at the time of going out, the public ID number registered in the wireless handset 7 is returned to the main device 1 side, and at this time When an out-going operation for obtaining a public ID number is performed by the wireless slave device, the returned public ID number is newly added to this wireless slave device.

As a result, if the minimum required public ID number for the system is registered in the main unit 1, telephone calls can be made through the public base station of each wireless slave unit without excess or deficiency. It is possible to reduce the basic fee paid to. Further, when the user of the wireless slave device makes a call via the public base station, the public ID number is given from the main device 1 to the wireless slave device used by the main device 1, so that the user is in charge of the wireless slave device. It becomes possible to freely make a call via a public base station by using, and therefore, it is possible to avoid borrowing a handset of another person whose public ID is registered when making a call via a public base station. As a result, it is possible to prevent a situation in which the extension of the wireless slave device cannot be called to the lender of the wireless slave device while the wireless slave device is rented. In addition, when returning home, in order to return and store usage record data such as call charges for calls made via a public base station while going out to the main unit 1 side, the call charges made by each wireless handset while out It can be centrally managed on the main device 1 side.

In this embodiment, the EEPR of the main device 1 is
Although the public ID number is registered in the OM 15 and the lending management to the wireless slave device side is performed, the public ID number may be registered in the master device 6. Further, in this embodiment, the main device 1
Although the parent device 6 and the parent device 6 are separately configured and used as the parent device, the parent device 6 may be configured to be built in the main device 1. In this case, the parent device corresponds to the main device. The mobile phone system is also applied to a system including a master unit connected to a telephone line and a plurality of wireless slave units wirelessly connected to the master unit. In this case, the parent device described above corresponds to the parent device. Further, in this embodiment, the main device 1 and the wireless slave device 7 store the private ID number and the public ID number in the same EEPROM, but two memories are provided, and one memory is used for the private ID. The number may be stored, and the public ID number may be stored in the other memory.

[0037]

As described above, according to the present invention, the public ID number registered in the second memory of the parent device is transmitted to the wireless slave device carried when going out. The registered public ID number is registered in the first memory and the transmitted public ID number is deleted from the second memory. Therefore, if the minimum public ID number necessary for the system is registered in the parent device, Calls through the public base stations of the respective wireless handsets can be performed without excess or deficiency, and therefore the basic charge paid to the telephone service company can be reduced. When the user of the child device wirelessly connected to the parent device wants to make a call via the public base station, the parent device assigns a public ID number to the wireless child device used by the parent device. It becomes possible to freely make a call via a public base station by using the wireless handset of the above. Therefore, it is possible to borrow the wireless handset of another person whose ID number is registered when making a call via the public base station. This is avoided, and as a result, it is possible to prevent a situation in which the extension of the wireless slave device cannot be called while the wireless slave device is rented.

When the wireless slave unit returns the public ID number when returning home from the home, the wireless slave unit transmits the public ID number registered in the first memory to the parent device. Public ID registered and sent in memory 2
Since the number is deleted from the first memory, the public ID number is always returned to the parent device side when returning home, and the person who goes out newly returns this to the new wireless slave device for himself. The registered public ID number can be registered to make a call at the nearest public base station. When the return operation is performed by the wireless slave device, the wireless slave device transmits the call record data together with the public ID number, and the call record data is stored in the third memory of the parent device. It is possible to centrally manage the actual data such as the call charge of the call made while the child device is out, on the parent device side.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a mobile phone system according to the present invention.

FIG. 2 is a block diagram of a master unit that constitutes the system of the embodiment.

FIG. 3 is a block diagram of a wireless slave device included in the system.

FIG. 4 is a flowchart showing main part operations of a main device and a wireless slave device which constitute the above system.

FIG. 5 is a flowchart showing an operation of main parts of a main device and a wireless slave device which constitute the system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main device, 6 ... Master device, 7 ... Wireless slave device, 14 ... Mobile phone interface, 15, 80 ... EEPROM, 16,
68, 78 ... CPU, 18 ... RAM, 61, 71 ... Wireless transceiver, 62, 72 ... Modem demodulator, 63, 66, 7
3, 76 ... Channel codec, 64, 74 ... Voice codec, 65 ... Main device interface, 67, 77
… Modem modulator, 81… Outgoing / going home switch.

Claims (3)

[Claims] 1. A master device accommodating a plurality of outside lines, and a plurality of wireless slave devices wirelessly connected to the master device, and an ID number for performing an outside line call in a first memory of each wireless slave device. In the mobile phone system in which is registered, a second memory for registering a predetermined number of public ID numbers in advance in the parent device, and a public ID number acquisition request from a wireless slave device carried when going out A means for transmitting the public ID number of the second memory and deleting the transmitted public ID number from the second memory, and an acquisition operation for acquiring the public ID number in the wireless slave device. And a means for making a public ID number acquisition request to the parent device in response to the detection output of the acquisition operation detection means, and transmitted from the parent device in response to the public ID number acquisition request. Public ID number Mobile telephone system which is characterized in that a registration means for registering the serial first memory. 2. The mobile phone system according to claim 1, wherein a return operation detecting unit that detects a return operation for returning a public ID number to the wireless slave device and a detection output of the return operation detecting unit Public ID registered in the first memory
And a means for deleting the transmitted public ID number from the first memory, and the parent device receives the public ID number transmitted from the wireless slave device, and A mobile phone system comprising means for registering in a second memory. 3. The mobile phone system according to claim 2, wherein the parent ID number transmitted to the parent device together with the public ID number from the wireless slave unit based on a return operation of the wireless slave unit. A mobile phone system comprising a third memory for storing the used call record data.