JP3027842B2 - Wireless telephone equipment - Google Patents

Abstract

PURPOSE:To call a desired portable telephone set just with a series of key operations required for calling an extension regardless of the presence or absence of the relevant telephone set in a calling area in regard of a radio telephone system which can be applied to another radio telephone system to which a portable telephone set controlled by itself is connected via a communication circuit. CONSTITUTION:A ROM 21 stores the extension and outside line numbers opposite to each other for the portable telephone sets. If the portable telephone set that is called and designated through an extension with operation of keys of a key input part 22 is not included in a calling area, the DTMF code corresponding to the extension call number stored in the ROM 21 is outputted to a voice CODEC part 16 from a DTMF code memory 25. Thus the DTMF signal corresponding to an outside line call number is outputted from a circuit interface part 11 and the relevant telephone set is called in another radio telephone system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises at least two telephones including a mobile telephone and a radio base station for setting up a radio line between these telephones, wherein the mobile telephone is connected to the radio base station via a communication line. The present invention relates to a wireless telephone device that can be used in another wireless telephone system connected to a wireless telephone system.

[0002]

2. Description of the Related Art As a telephone system related to a wireless telephone device, for example, there is a second generation cordless telephone system which is currently being studied in Japan. This second generation cordless telephone system is a public switched telephone (PSTN).
phone Network) and ISDN (Integrated Services Digi
tal Network), which is connected to multiple public wireless base stations and a control center that controls communication via these wireless base stations, and is used in ordinary homes and offices. By registering the portable telephone of the cordless telephone device in the control center, the portable telephone of the cordless telephone device can be used outdoors as well as the ordinary portable telephone. In other words, this telephone system allows the same mobile phone to make and receive calls from anywhere, not only in private areas such as homes and offices, but also outdoors. .

In this telephone system, when a portable telephone of a cordless telephone device is registered in the control center, a calling method for calling the portable telephone registered with another telephone of the cordless telephone device is as follows. It depends on whether the mobile phone is at home, in an office, or taken outside. That is, when the mobile phone is located in a home or office, the call can be made via a private wireless base station installed in the home or office as in a conventional cordless telephone device. Dial operation for operating the extension selection key, and then performing a dial operation for inputting the extension number,
On the other hand, when the portable telephone is taken out of the office, a call must be made through the communication line network and the public wireless base station, so that a dial operation for calling an outside line is performed.

[0004]

However, in this telephone system, the cellular phone of the cordless telephone device can be used outdoors as described above, so that the user of the cellular phone does not need to notify his / her family and colleagues of his / her location. In some cases, the user may carry a mobile phone and go out.

[0005] In such a case, the person who is working for the user first performs a dial operation for calling a mobile phone carried by the user by extension assuming that the user is at home or in a business place. After that, the user must dial again to call the outside line. For this reason, there is an inconvenience that the dial operation for calling is complicated.

Such inconvenience is caused not only by the above-described second-generation cordless telephone system but also by other complex wireless telephone systems, for example, a cordless telephone device independently installed at a plurality of offices. This also occurs in a system in which the portable telephone of each cordless telephone device can communicate with the wireless base station of the cordless telephone device at another business office.

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 perform a series of key operations irrespective of whether a portable telephone to be called is in an extension calling area. To provide a wireless telephone device capable of calling the portable telephone.

[0008]

According to the present invention, there is provided at least two telephones including a mobile telephone, and a wireless base station for establishing a wireless line between the telephones, wherein the mobile telephone is connected to the wireless base station via a communication line. In a wireless telephone device usable in another wireless telephone system connected to a base station, an extension call number for calling the portable telephone through the wireless base station and the portable telephone in the other wireless telephone system are included. Call number storage means for storing an external line call number for calling via a wireless base station in association with the external line call number, and an internal call mode or an external call mode set by the portable telephone and other telephones, and based on the set mode. Call control means for calling an extension or an outside line, and the call control means is set to an extension call mode for calling the mobile phone by extension. At this time, the call control means is provided with external call instruction means for outputting a command signal for transmitting an external call number stored in the call number storage means in correspondence with the extension call number of the mobile phone to the communication line. It becomes.

More specifically, the outside line calling command means determines whether or not the portable telephone is within a calling area of the wireless telephone device, and automatically determines the command signal when it is determined that the portable telephone is not within the calling area. Or a manually operated switch provided on the calling side telephone which designates the mobile phone as an extension call.

[0010]

According to the present invention, when the call control means is set to the extension call mode for calling the portable telephone by extension, the call control means is provided with the call number storage means corresponding to the extension call number of the portable telephone. Line calling command means for outputting a command signal for sending the outside line calling number stored in the communication line to the communication line, so that when the portable telephone is not within the calling area of the wireless telephone device, The mobile phone can be called via a wireless base station in another wireless telephone system by a simple switch operation.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a schematic configuration of a second generation cordless telephone system.

In FIG. 1, reference numeral 1 denotes an existing communication network formed of PSTN, ISDN, or the like. This communication network 1
Includes an ordinary fixed telephone 2, one radio base station 3a and 1
One or a plurality of mobile phones 3b, a so-called system cordless phone 4 including a plurality of wireless base stations 4a and a plurality of mobile phones 4b, and a plurality of public wireless base stations 5-7. A control center 8 for controlling communication via the public wireless base stations 5 to 7 is connected.

The cordless telephone device 3 is usually installed in a general home, and a radio base station 3a is directly connected to a subscriber line. The system cordless telephone device 4
Is usually installed in the business office, and the radio base station 4a
It is connected to a plurality of subscriber lines via BX (Private Branch Exchange) 4c. A plurality of fixed telephones 4d are also connected to the PBX 4c.

The control center 8 has a subscriber storage unit, and only mobile phones registered in the subscriber storage unit can communicate via the public wireless base stations 5 to 7. The mobile phone 3b of the cordless telephone device 3, the mobile phone 4b of the system cordless telephone device 4, and other mobile phones 9 can be registered in the subscriber storage unit. The data registered in the subscriber storage unit includes an ID (Indentification) code of each mobile phone, a telephone number (a number for designating a call of the mobile phone from the fixed telephone 2 or the like), an owner name thereof, and the like.

The control center 8 also has a position information storage unit for storing information as to which public wireless base station each of the subscribed portable telephones is currently in the call areas (communication areas) 5a to 7a.

When the telephone number of the portable telephone registered in the subscriber storage unit is input from the fixed telephone 2 or the telephones of the cordless telephone devices 3 and 4, the control center 8 stores the telephone number stored in the location information storage unit. The calling area where the mobile phone is located is determined based on the information, and the ID code of the mobile phone to be called is transmitted from the wireless base station in the calling area to call the mobile phone.

In the second-generation cordless telephone system described above, the calling method performed in the present invention can be applied to the cordless telephone device 3 and the system cordless telephone device 4.

Next, a case where the present invention is applied to a cordless telephone device 3 will be described. FIG. 2 is a diagram showing a circuit configuration of the wireless base station 3a of the cordless telephone device 3 to which the present invention is applied. Note that the wireless base station described in this embodiment is a wireless base station having a telephone function, and is provided with a dial key, a handset, and the like.

In FIG. 2, reference numeral 11 denotes the communication network 1 of FIG.
The line interface unit is connected to the subscriber line, and includes a call detection circuit for detecting a call from the subscriber line, a line connection switch for turning on / off the line connection, a speech network circuit, and the like. The call detection circuit and the line connection switch of the line interface unit 11 are connected to the control unit 12, and the speech network is connected to the wireless communication unit 13 via a pair of input / output lines.

The wireless communication unit 13 is for performing wireless communication with the portable telephone 3b shown in FIG. 1, and is also connected to the control unit 12 to communicate with the control unit 12. Data such as control data is exchanged.

A line switching circuit 14 controlled by the control unit 12 is connected to the pair of input / output lines for connecting the line interface unit 11 and the wireless communication unit 13.
The handset 15 is connected to both the line interface unit 11 and the wireless communication unit 13 by line switching by the line switching circuit 14.

The wireless communication unit 13 is for performing wireless communication with the mobile phone 3b as described above, and its circuit configuration differs depending on the modulation method and transmission method of the wireless signal. In the case of the second generation cordless telephone system, the modulation scheme is π / 4 shift QPSK (Quarternary Ph
ase-Shift Keying) and the transmission method is TDMA-
TDD (Time Division Multiplex Access -Time Divis
ion duplex), the wireless communication unit 13
Is composed of a speech codec section 16, a frame processing section 17, a digital modulation / demodulation section 18, a transmission / reception section 19, and an antenna 20.

The audio codec unit 16 converts an analog audio signal input from the line interface unit 11 or the handset 15 into a digital audio signal and sends the digital audio signal to the frame processing unit 17. This is a circuit unit that converts a signal into an analog audio signal and sends it to the line interface unit 11 or the handset 15.

The frame processing unit 17 is connected not only to the audio codec unit 16 but also to the control unit 12, and the TDM
This is a circuit unit for transmitting and receiving a communication control signal and a digital audio signal based on the A-TDD method. That is, the control unit 12
, Such as a call number of a mobile phone (ID code of the mobile phone) and a digital voice signal from the voice codec section 16 to the digital modulation / demodulation section 18 at a predetermined timing, and conversely, reception at a predetermined timing. A process for transmitting the signal from the digital modulation / demodulation unit 18 to the control unit 12 and the audio codec unit 16 is performed.

The digital modulator / demodulator 18 is a π / 4 shift QPS modulated by the digital signal from the frame processor 17.
The K signal is sent to the transmitting / receiving section 19, and the π /
This is a circuit unit which demodulates the 4-shift QPSK signal into a digital signal and sends it to the frame processing unit 17.

The transmission / reception unit 19 converts the π / 4 shifted QPSK signal into a radio wave in the UHF (Ultra High Frequency) band and transmits it from the antenna 20, or obtains a π / 4 shifted QPSK signal from the radio wave received by the antenna 20. It is a circuit part.

The control section 12 is a circuit section for controlling communication and communication via the line interface section 11 and the radio communication section 13 and other controls. The control unit 12 has a built-in microprocessor, and has a ROM (Read Onl
The above-mentioned control is performed based on the program stored in the (y Memory) 21.

The ROM 21 stores not only a control program but also management data for managing the ID code of the wireless base station 3a itself and the mobile phone 3b. FIG.
FIG. 4 is a diagram showing details of a management data storage unit provided in the ROM 21 for storing the management data.
As shown in FIG. 3, the management data storage unit includes an area for storing the management number of the mobile phone, an area for storing the ID code of the mobile phone, and an area for storing a telephone number for calling the mobile phone via an outside line. For all mobile phones managed by the wireless base station, the management number, ID code, and telephone number of each mobile phone can be stored as a set of data.

One of the features of the present invention is that, as data for managing a portable telephone belonging to a cordless telephone device,
Not only the management number of each mobile phone and its ID code,
The point is that a telephone number for calling the mobile phone via an outside line is also stored.

The ID code of each mobile phone stored in the management data storage section of the ROM 21 is used as a call number when calling the mobile phone via the radio communication section 13, and the mobile phone which requests communication is provided. It is used to determine whether the telephone is a mobile telephone managed by the radio base station.

The control unit 12 further includes twelve dial keys for inputting dial data and the like and an extension selection key for selecting an extension call via the radio communication unit 13. A key input unit 22; a random access memory (RAM) 23 for storing dial data and the like input from the key input unit 22; a display unit 24 for displaying dial data and the like input from the key input unit 22; DTMF (Dual-Tone Multi-Frequency) corresponding to dial data input from the input unit 22
A DTMF code memory 25 for outputting a signal from the voice codec unit 16, a speaker 26 for notifying a call from a subscriber line or a call from a mobile phone, and a hook switch 27 for detecting that the handset 14 has been lifted. Is connected.

Next, a calling process for calling the mobile phone 3b managed by the radio base station 3a using the telephone function of the radio base station 3a shown in FIG. 2 will be described with reference to a flowchart shown in FIG.

In this embodiment, in the case of an extension call,
After the handset 15 is off-hook, the operation of the extension selection key and the operation of the dial key for inputting the extension number are performed. In the case of an external call, after the handset 15 is off-hook, the telephone number of the telephone to be called is input. It is assumed that the control unit 12 once turns on a line connection switch in the line interface unit 11 when the handset 15 is off-hook when an extension is called.

When the handset 15 goes off-hook,
The control unit 12 repeatedly determines whether or not the extension selection key of the key input unit 22 has been operated (step S1) and whether or not the dial key has been operated (S2).

If it is detected in step S1 that the extension selection key has been operated, the extension mode is set in step S3.
After the line connection switch in 1 is turned off, step S1
Return to

When it is detected in step S2 that the dial key has been operated, it is determined in step S5 whether the extension mode is set. If the extension mode has not been set, the process proceeds to step S6, where the DTMF code memory 25 is accessed based on the key code of the operated dial key, and the DTMF code memory 25 is accessed.
Output a DTMF code corresponding to the key code. DTM output from DTMF code memory 25
The F code is converted to a DTMF signal by the voice codec unit 16 and then output to the communication network 1 via the line interface unit 11 and the subscriber line, and is output to the communication network 1.
Is recognized as one digit of the telephone number by the exchange, which is the interface unit with the subscriber line.

After the processing of step S6 (access processing of the DTMF code memory 25) is completed, step S1 is executed.
To prepare for the next key input. If the extension mode is not set, the process in step S6
It is executed every time the dial key is operated.

As described above, after off-hook of the handset 15, the dial key is operated without operating the extension selection key. This key operation is a dial operation for calling an outside line, and is carried out outdoors. This dial operation is also performed when directly calling a mobile phone that is present. That is,
After off-hook of the handset 15, the telephone number of the mobile phone to be called is input by operating the dial keys of the key input unit 22. As a result, the information for specifying the mobile phone to be called is sent to the control center 8 shown in FIG. 1, and the specified mobile phone is called from the call areas 5a to 5a.
7a, the corresponding public wireless base station 5
7 can be called.

If it is determined in step S5 that the extension mode has been set, that is, if the extension selection key has been operated prior to the operation of the dial key, the control unit 12 proceeds to step S7. After starting the built-in timer I, the extension calling process is started in the following step S8.

This extension calling process is a process for calling a corresponding mobile phone via the radio communication unit 13 based on the extension number input by the dial key, that is, the management number of the mobile phone to be called. For example, if the operated dial key is the key of the numerical value “1” after the operation of the extension selection key, that is, if the mobile phone of the management number 1 is called and designated, the management data storage unit of the ROM 21 is stored in the management data storage unit. The ID code “303” (see FIG. 3) corresponding to the management number 1 is read out from the stored ID codes of the plurality of mobile phones, and is sent to the frame processing unit 17 of the wireless communication unit 13, and A call signal for calling the mobile phone of the management number 1 is transmitted from the antenna 20 of the communication unit 13.

The timer I is a timer for defining the time for performing the extension calling process. The timer time is used so that the person carrying the called mobile phone can recognize the call with the call notification sound without fail. In addition, it is sufficient that the time is long enough to perform a key operation for answering the call.

After executing the processing in step S8, a determination processing is performed as to whether or not there is a signal responding to the call from the mobile telephone having the management number 1 called (step S9).
And a process of determining whether or not the timer I has timed out (step S10) is repeatedly executed.

If there is a signal responding to the call from the portable telephone having the management number 1 before the timer I expires, the process proceeds from step S9 to step S1.
Proceeding to 1, the extension call processing is stopped, a channel for a call is set, and the processing is terminated. Step S1
After the communication channel is set at 1, a call can be made thereafter between the handset 15 and the mobile phone of the management number 1 via the wireless communication unit 13.

When the timer I times out,
Proceeding to step S12, the extension calling process is stopped, and the display unit 24 and the speaker 26 notify that the mobile phone is not in the calling area.
At 13, a timer II built in the control unit 12 is started.
This timer II is a timer that defines the time until the mobile phone is automatically called via an outside line. The timer time is used to determine that the mobile phone is not in the calling area by the notification processing in step S12. A known caller can determine whether or not it is necessary to call the mobile phone via an external line, and if it is determined that it is not necessary, perform an operation for canceling the external line call, for example, on-hook the handset 15. Any time sufficient for performing the operation may be used.

The notification in step S12 is based on timer II
Is desirably continued until the time is up. More preferably, the timer II is a subtraction timer, and the remaining time of the timer, which changes every moment, is continuously displayed on the display unit 24 until the remaining time of the timer becomes zero.

After the timer II is started, it is determined whether or not there is a command to stop the outside line call (step S).
14) and a process of determining whether or not the timer II has timed out (step S15) is repeatedly executed.

If there is a command to stop the outside line call before the timer II times out, step S16
Then, the process for stopping the calling of the mobile phone of the management number 1 via the outside line, that is, the process of not performing the outside line calling process in step S17 described later is executed. This suspension processing is, for example, processing for stopping the operation of the timer II, for example.

When the timer II times out,
Proceeding to step S17, a calling process via an outside line is executed. That is, a signal is sent to the line interface unit 11 to turn on a line connection switch built in the line interface unit 11, and the telephone number “7000” of the mobile phone with the management number 1 stored in the management data storage unit of the ROM 21. (See FIG. 3) and read DT
A process for sending to the MF code memory 25 is executed. As a result, a DTMF signal corresponding to the telephone number “7000” is generated by the voice codec unit 16 and the generated DTMF signal is generated.
The signal is output to the communication network 1 shown in FIG. Therefore, if the mobile phone with the management number 1 is in any of the call areas 5a to 7a shown in FIG. 1, the call is made via the corresponding public wireless base stations 5 to 7.

As described above, according to the present embodiment, not only the ID code of the mobile phone used for calling an extension but also the telephone number used to call the mobile phone via an external line are stored in the ROM 21 as management data of the mobile phone. If the mobile phone does not respond within a predetermined time when the mobile phone is called by extension, the mobile phone is automatically called by an external line using the telephone number stored in the ROM 21. Therefore, even if the mobile phone is taken outside, the mobile phone can be called only by dialing for an extension call, and the dialing for calling can be greatly simplified.

Next, a second embodiment of the present invention will be described. In the present embodiment, information as to whether or not a mobile phone managed by the wireless base station is in the calling area of the wireless base station is stored in the wireless base station, and an extension calling operation for calling the mobile phone is performed. At this time, it is automatically determined whether to make an extension call or an outside call based on the stored information.

The information as to whether or not the portable telephone is in the calling area of the radio base station can be stored in the RAM. The configuration of the wireless base station of the present embodiment is substantially the same as the configuration of the wireless base station of the first embodiment shown in FIG. Description will be made with reference to the configuration of the base station.

The information as to whether or not the portable telephone is in the calling area of the radio base station is stored in the RAM 23 connected to the control unit 12. FIG. 5 is a diagram showing details of a storage unit provided in the RAM 23 for storing the information. As shown in FIG. 5, the storage unit has an area for storing a management number of the mobile phone and a flag area for storing flag information for identifying whether the mobile phone is in a calling area of the radio base station, For all the mobile phones managed by the wireless base station, a management number of each mobile phone and flag information indicating whether or not the mobile phone is in the calling area of the wireless base station 3a are stored as a set of data. I can do it.

The setting of the flag information may be performed, for example, by setting the system of the cordless telephone device 3 such that the wireless base station 3a periodically transmits a response request signal to the mobile phone 3b and receives the request signal. However, if a configuration is adopted in which a confirmation signal is immediately transmitted and a response is made, this can be performed automatically. That is, the wireless base station 3a periodically transmits a response request signal to the mobile phone 3b, and upon receiving the confirmation signal, the mobile phone 3 which has transmitted the confirmation signal.
If the flag of b is set and the confirmation signal does not return within a predetermined time, a process of lowering the flag of the mobile phone 3b may be performed. Even if such a signal is exchanged, the mobile phone can be charged at any time in the home, and in many cases, the mobile phone is charged. Therefore, it is not necessary to pay much attention to the power consumption of the battery.

FIG. 6 is a flow chart for explaining a method of calling a portable telephone in the second embodiment.
In this embodiment, the description will be made assuming that the same dial operation as that of the first embodiment is performed for the dialing operation for the extension call and the external line call.

In FIG. 6, the processing of steps T1 to T6 is the same as the processing of steps S1 to S6 of the first embodiment shown in FIG. That is, after the handset 15 is off-hook, the operation key determination processing is performed in steps T1 and T2, and if it is determined in step T1 that the operation key is the extension selection key, the extension mode setting processing in step T3 is performed. In step T4, the line connection switch is turned off. If it is determined in step T2 that the operation key is a dial key, the process proceeds to step T2.
At 5, it is determined whether the extension mode is set or not.
If the extension mode is not set, the access processing of the DTMF code memory 25 in step T6 is executed,
Normal outside line calling processing is performed.

According to the present embodiment, the RAM 23 stores flag information for identifying whether or not a mobile phone managed by a radio base station is within the calling area of the radio base station. Or an external line call is automatically determined. Therefore, when it is determined in step T5 that the extension mode is set, the first process is performed.
Different from the embodiment.

That is, if it is determined in step T5 that the extension mode has been set, the process proceeds to step T7, where the portable telephone having the extension number (management number) entered with the dial key calls the radio base station. Whether it is in the area or not is determined based on the flag information stored in the RAM 23. For example, when the extension number input with the dial key is “2”, the flag information corresponding to the management number 2 stored in the RAM 23 is read, and
Based on the contents of the read flag information, it is determined whether or not the mobile phone of management number 2 is in the calling area.

If it is determined in step T7 that the vehicle is in the calling area, the process proceeds to step T8 to execute an extension calling process. That is, it reads out the ID code “304” (see FIG. 3) corresponding to the management number 2 stored in the management data storage unit of the ROM 21 and sends it to the frame processing unit 17 of the wireless communication unit 13 for wireless communication. A call signal for calling the mobile phone of the management number 2 is transmitted from the antenna 20 of the machine unit 13, and the process is terminated. It should be noted that this call signal is transmitted until a call stop operation (for example, the handset 15 is returned to its original state) or a response signal based on the key operation of the user is received from the mobile phone of the management number 2. Continue.

If it is determined in step T7 that the mobile phone with the management number 2 is not in the calling area, the process proceeds to step T9, and steps S12 to S12 of the first embodiment shown in FIG. The same processing as in S17 is performed. That is, in step T9, the display unit 24 and the speaker 26 notify that the mobile phone is not in the calling area, and at the same time, the timer built in the control unit 12 is started in step T10. The function of the timer is the same as the function of the timer II in the first embodiment, and the notification that the mobile phone is not in the calling area is made by displaying the remaining time of the timer on the display unit 24 as described in the first embodiment. It is desirable to perform this until the timer times out while displaying with.

After the timer is started, it is determined whether or not there is a command to stop the outside line call (step T1).
1) and a process of determining whether or not the timer has timed out (step T12) is repeatedly executed. If there is a command to stop the outside line call before the timer expires, the process proceeds to step T13 to execute a process for stopping the call of the mobile phone of the management number 2 via the outside line. That is, processing such as stopping the operation of the timer is executed.

If the timer has expired, the flow advances to step T14 to execute a calling process via an outside line. That is, a signal is sent to the line interface unit 11 to turn on a line connection switch built in the line interface unit 11, and the telephone number “7001” of the mobile phone with the management number 2 stored in the management data storage unit of the ROM 21. (See Figure 3)
A process for sending to the F-code memory 25 is executed. As a result, a DTMF signal corresponding to the telephone number “7001” is generated by the voice codec unit 16 and the generated DTMF signal is generated.
The signal is output to the communication network 1 shown in FIG. Therefore, if the mobile phone with the management number 2 is in any of the call areas 5a to 7a shown in FIG. 1, the call is made via the corresponding public wireless base stations 5 to 7.

In the second embodiment, a storage unit is provided in the RAM 23 for storing information as to whether or not a portable telephone managed by the radio base station is within the calling area of the radio base station. Information is periodically updated, and when a dial operation for an extension call is performed, whether the designated mobile phone is within the call area of the radio base station based on the information stored in the storage unit. Since it is determined whether or not a call is to be made and an internal call and an external call are automatically made, external calls can be made in a relatively short time when the designated mobile phone is not within the call area of the radio base station. Can be. Therefore, if the telephone number used to call the mobile phone via an outside line is not registered as an abbreviated number or the like, that is, if all digits of the telephone number must be entered by key operation, the person to be called Even if it is known that the user is out of the office, dialing by extension as described above simplifies the dialing operation.

In the first and second embodiments, when it is determined that the portable telephone to be called is not within the calling area of the radio base station, a notification is issued and a timer is started at the same time. Although the outside line call is automatically executed based on the time-up, the outside line call may be executed based on a manual operation. That is, when a predetermined key for instructing execution of an outside line call is operated before the handset 15 is turned on after the notification, the telephone of the mobile phone stored in the management data storage unit in the ROM 21 is operated. The number may be read and an outside line call may be executed. In this case, the number of key operations is increased by one compared with the first and second embodiments. However, since the execution of the outside line call is performed at the time when the predetermined key is operated, the first and second embodiments using the timer are performed. It is possible to execute an outside line call in a shorter time than in (1).

In the first embodiment, the detection of the operation of the predetermined key for instructing the execution of the outside line calling is performed not only after the notification but also during the execution of the extension calling process. It may be. Specifically, in the call processing flow of the mobile phone shown in FIG. 4, a step is provided for determining whether or not the predetermined key has been operated during a determination processing routine consisting of steps S9 and S10 repeatedly executed. Good. As a result, the outside line calling process can be executed in a shorter time.

Further, in the first and second embodiments described above, the case where the call designation of the portable telephone is performed by the key input unit 22 provided in the radio base station is described. Can be applied to other portable telephones of the cordless telephone device. In this case, the wireless base station relays the call of the mobile phone and the call relay between the calling mobile phone (the calling mobile phone) and the called mobile phone (the called mobile phone). Although functioning as a relay station, the configuration of the radio base station itself is almost the same as the configuration shown in FIG. 2, and the only difference is only the internal configuration of the frame processing unit 17. Therefore, it is not specifically shown,
Only the differences will be described.

In the first and second embodiments, the frame processing section 17 sends the digital audio signal received from the digital modulation / demodulation section 18 to the audio codec section 16 and converts the digital audio signal from the audio codec section 16 into a digital signal. The processing of sending the data to the modem 18 has been performed.

However, when a call is relayed between the calling mobile phone and the called mobile phone, the frame processing unit 17
Receives the digital voice signal from the calling mobile phone, sends the received digital voice signal to the digital modem 18 at the transmission timing to the called mobile phone, and outputs the digital voice signal from the called mobile phone. When the voice signal is received, it is necessary to transmit the received digital voice signal to the digital modulation / demodulation unit 18 at a transmission timing to the calling mobile phone.

The signal transmission system of the embodiment is TDMA-TDD.
Therefore, specifically, it is necessary to temporarily hold the digital audio signal received first in the frame processing unit 17 and transmit the digital audio signal received later to the digital modulation / demodulation unit 18 first.

For this reason, the frame processing unit 17 in the present embodiment transfers the audio data previously received via the digital modulation / demodulation unit 18 to, for example, a transmission buffer in the frame processing unit 17 and temporarily holds the audio data. The post-received audio data can be directly sent from the reception buffer in the frame processing unit 17 to the digital modulation / demodulation unit 18. Also,
One transmission buffer is added in the frame processing unit 17,
It is also possible to adopt a configuration in which audio data from two mobile phones that are received with a time lag are transferred to different transmission buffers, and are transmitted from the respective transmission buffers to the digital modulation / demodulation unit 18 at predetermined transmission timings. It is.

That is, the frame processing section 17 in this embodiment can not only transmit the received digital audio signal from the digital modulation / demodulation section 18 to the audio codec section 16 but also digitally demodulate the received digital audio signal at the respective timings described above. It is also configured so that it can be sent to the unit 18, and can be switched depending on whether the mode is the normal mode or the relay mode.

Next, differences in the calling process will be described. When the call designation of the portable telephone is performed by another portable telephone of the cordless telephone device, the dial operation for calling the portable telephone by extension and the key operation for canceling the outside line call are performed by the calling portable telephone. Will be Therefore,
In the first and second embodiments, the processing determined by the control unit 12 based on the signal from the key input unit 22, that is, the processing of steps S1, S2, and S14 in FIG. 4, or the steps T1, T2, and T11 in FIG. Are performed based on the key code signal of the calling mobile phone, which is received by the antenna 20 and input via the frame processing unit 17, respectively.

Also, the notification that the designated mobile phone is not in the calling area needs to be performed by the calling mobile phone, so the notification process in step S12 in FIG. 4 or the notification in step T9 in FIG. The process is a process of transmitting a notification command signal to the calling mobile phone.

Further, the present invention is applicable to a system cordless telephone device. In this case, the storage unit stores the mobile phone management data and the flag information indicating whether or not the mobile phone is in the business office, rather than providing each of the plurality of wireless base stations, an exchange function unit in the system cordless telephone device,
For example, in the system cordless telephone device 4 shown in FIG. 1, it is desirable to provide the PBX 4c. As a result, the management of all the mobile phones belonging to the system cordless telephone device is centralized, and the processing is facilitated.

[0074]

According to the present invention, there are provided at least two telephones including a mobile telephone and a radio base station for setting a radio line between these telephones, wherein the mobile telephone is connected to the radio base station via a communication line. An extension call number for calling the mobile phone through the radio base station and a radio base station in the other radio telephone system, wherein the radio telephone device can be used in another radio telephone system connected to the radio telephone system. Call number storage means for storing an external call number for calling via a station in association with an external call number; and an extension call mode or an external call mode set by the portable telephone and other telephones, and an extension based on the set mode. Call control means for making a call or outside line call; and when the call control means is set to an extension call mode for calling the mobile phone by extension, The call control means is provided with external call command means for outputting a command signal for transmitting the external call number stored in the call number storage means in correspondence with the extension call number of the mobile phone to the communication line. So
When the portable telephone is not within the calling area of the wireless telephone device, the portable telephone can be called via a wireless base station in another wireless telephone system automatically or by a simple switch operation.

Therefore, even if the portable telephone which the caller wants to call is taken outside without the caller's knowledge, the caller performs dial operation for calling the portable telephone by extension. Alone or after this dialing operation, when it is determined that the mobile phone is not within the calling area of the wireless telephone device, only one additional key operation is performed, and the wireless base station in another wireless telephone system is operated. The mobile phone can be called via a station, and dialing for calling can be greatly simplified.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a composite wireless telephone system according to the present invention.

FIG. 2 is a circuit configuration diagram of a wireless base station of the cordless telephone device according to the present invention.

FIG. 3 is a diagram showing a management data storage unit for a mobile phone provided in the ROM shown in FIG. 2;

FIG. 4 is a flowchart illustrating a calling process of a mobile phone.

5 is a diagram showing a data storage unit for a mobile phone provided in the RAM shown in FIG. 2;

FIG. 6 is a flowchart illustrating another example of the calling process of the mobile phone.

[Explanation of symbols]

 Reference Signs List 1 communication line network 3 cordless telephone device 4 system cordless telephone device 5, 6, 7 public wireless base station 8 controller center 11 line interface unit 12 control unit 13 wireless communication unit 14 line switching circuit 15 handset 16 voice codec unit 17 frame processing Unit 18 digital modulation / demodulation unit 19 transmission / reception unit 20 antenna 21 ROM 22 key input unit 23 RAM 24 display unit 25 DTMF code memory

Claims (10)

(57) [Claims] 1. A wireless communication system comprising: at least two telephones including a mobile telephone; and a wireless base station for establishing a wireless line between the telephones, wherein the mobile telephone is connected to the wireless base station via a communication line. A wireless telephone device that can also be used in a wireless telephone system, wherein an extension call number for calling the mobile phone via the wireless base station and a mobile phone via a wireless base station in the other wireless telephone system. Call number storage means for storing the external call number in association with the external call number, and an internal call mode or an external call mode is set by the portable telephone and other telephones, and an internal call or an external call is performed based on the set mode. Call control means; and when the call control means is set to an extension call mode for calling the mobile phone by extension, the call control means External call command means for outputting a command signal for transmitting the external call number stored in the call number storage means in correspondence with the extension call number of the mobile phone to the communication line. Wireless telephone device. 2. The wireless telephone device according to claim 1, wherein the wireless base station is a cordless telephone device, and the call number storage means and the call control means are provided in the wireless base station. Item 2. The wireless telephone device according to Item 1. 3. The wireless telephone device according to claim 1, wherein one of the telephones is a telephone connected to the wireless base station. 4. The wireless telephone device is a system cordless telephone device having a plurality of wireless base stations, and the call number storage means and the call control means connect the plurality of wireless base stations and a communication line. 2. The wireless telephone device according to claim 1, wherein the wireless telephone device is provided in an exchange unit. 5. The outside line calling command means includes means for determining whether or not the portable telephone is within a calling area of the wireless telephone device, and when the determining means determines that the mobile phone is not within the calling area. 2. The wireless telephone device according to claim 1, wherein the command signal is output. 6. The outside line calling command means for determining whether or not the portable telephone is within a calling area of the wireless telephone device, and is activated when the determining means determines that the mobile phone is not within the calling area. 2. The wireless telephone device according to claim 1, further comprising timer means for outputting the command signal when the timer means has timed out. 7. The outside line call command means further comprising: when the judgment means judges that the outside line is not within the call area.
7. The wireless telephone device according to claim 5, further comprising a notifying unit for notifying that effect. 8. The method according to claim 5, wherein the determining means determines whether a response signal has been received from the mobile phone within a predetermined time after calling the mobile phone via an extension. Or the wireless telephone device according to 6. 9. A storage unit for storing information indicating whether or not the mobile phone is in a calling area, and an updating unit for periodically updating information stored in the storage unit, wherein the determination unit is 7. The wireless telephone device according to claim 5, wherein the determination unit is a unit that determines based on information stored in the storage unit. 10. The wireless telephone device according to claim 1, wherein said outside line call command means is a manual operation switch provided on a calling telephone set that designates an extension call of said portable telephone.