JP3244455B2 - Cordless phone system cordless handset - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone system having a base unit and a base unit for performing wireless communication with the base unit or a public base station.

[0002]

2. Description of the Related Art At present, PHS (Personal Handy) is used in Japan.
A public terminal of the second generation cordless telephone system is marketed under the name of "-phone System". This terminal is used to communicate with a public base station (PHS base station), but is also used as a slave of a cordless telephone system for private use. For self-employed use, there are household use and business use.

FIG. 6 is a diagram showing an example of a cordless telephone system for private use. The base unit of the cordless telephone system is connected to a telephone line. The child device A and the child device B can communicate with the parent device by performing the child device registration and the position registration on the parent device. The child device number set in the child device by the position registration at this time is stored in the parent device. Based on the slave unit number, the master unit calls the slave unit and makes a call such as an extension.

[0004] Each of the slave units registers a public telephone number with the PHS management station, thereby performing PHS registration.
Can communicate with base stations. By dialing out this public telephone number, the slave unit can be called via the PHS base station. If the slave unit is set in the transceiver mode, it is possible to directly make a call between the slave units.

[0005]

Normally, the base unit uses the slave unit number to call the slave unit. However, when the child device has left the communicable range (about 100 m) of the parent device, the parent device cannot call the child device by the child device number. At this time, the master unit can call the slave unit via the PHS base station by dialing a public telephone number.

In order to make it easier for the master unit to call the slave unit with the public telephone number, a method of storing the public telephone number and automatically dialing the telephone is conceivable. Furthermore, if this public telephone number is automatically stored, the trouble of inputting can be saved, and further, input errors can be prevented.

[0007] However, there is no concrete method for automatically storing the public telephone number in the base unit. Further, as a problem of this method, there is a problem of eliminating a restriction that the slave unit has to previously store the public telephone number, and a problem of coping with a case where the public telephone number of the slave unit is changed.

[0008]

SUMMARY OF THE INVENTION In view of the above, a cordless telephone system of the present invention has been made in consideration of the above points. The cordless telephone system has a storage unit for storing a public telephone number and a location registration process for a base unit. Control means for performing a call, wherein the base unit calls the slave unit with the position-registered slave unit number, and when there is no response from the slave unit, calls the slave unit with the public telephone number in the slave unit of the cordless telephone system. The control unit of the slave unit transmits a public telephone number stored in the storage unit to the master unit when performing a location registration process to the master unit.

[0009] If the public telephone number is not stored in the storage means, the control unit of the slave unit performs a location registration process after the public telephone number is stored, and stores the public telephone number in the master unit. Is to send to.

[0010] Further, the control means of the slave unit, when the public telephone number is rewritten, performs a location registration process again and transmits the public telephone number to the master unit.

Further, the control means of the slave unit performs a location registration process during standby and transmits a public telephone number to the master unit.

[0012]

Embodiments of the present invention will be described with reference to the drawings. The cordless telephone system of the embodiment is a base unit (1).
And a slave A (2) and a slave B (3). FIG. 1 is a block diagram showing a configuration of a main part of the master unit (1), and FIG. 2 is a block diagram showing a configuration of a main part of the slave unit A (2). still,
Slave unit B (3) has the same configuration as slave unit A (2).

First, the structure of the main part of the master unit (1) will be described. In FIG. 1, (11) is an incoming call detection circuit,
It is connected to the telephone line (L) and detects an incoming call. A network circuit (12) is connected to the telephone line (L) and releases and closes the line. (13) and (14) are a speaker and a microphone for a handset. (15) is a dial transmission circuit for transmitting a dial number designated by a control circuit (22) described later.

(16) is a channel / voice codec, in which a channel codec (not shown) and a voice codec (not shown) are incorporated in one IC. Channel codec unit detects electric field strength, TDMA / TD
It performs D (time division multiple access / time division duplex) processing, CRC error detection, QPSK demodulation, and the like. The audio codec unit compresses and expands audio, and performs analog and digital conversion.

Reference numeral 17 denotes a switching circuit, which connects a handset speaker (1) to a network circuit (12).
3) Switch to the microphone (14) or channel / voice codec (16). (18) is a receiving circuit, which receives a radio wave from the slave A (2) or the slave B (3) via the antenna (19). A transmission circuit (20) transmits a signal from the channel / voice codec (16) via the antenna (19) to the slave unit (2) or the slave unit B.
Send to (3). Reference numeral (21) denotes a PLL circuit which changes the transmission and reception frequencies of the receiving circuit (18) and the transmitting circuit (20).

(22) is a control circuit comprising a microprocessor, and a ROM (2) storing an operation program.
Each part is controlled based on 3). Reference numeral (24) denotes a RAM which stores information necessary for the operation of the control circuit (22), for example, the slave unit number (241) and the public telephone number (242) of each slave unit (2) (3). Remember based on request. (2
5) is a bell, which outputs a ringing tone upon receiving a call. (2
6) is a liquid crystal display means for displaying a telephone number and the like. Numeral (27) is an input means, which is a numeric keypad (271) for inputting a telephone number, a slave A key (272) for calling the slave A (2), and a slave B key (27) for calling the slave B (3).
3).

Next, the configuration of the main part of the slave unit A (2) will be described. In FIG. 2, reference numeral (41) denotes a receiving circuit, which receives a radio wave from the parent device (1), the child device B (3) or the public base station (4) via the antenna (42). (43) is a transmission circuit, which is a channel / voice codec (4) described later.
The signal from 5) is transmitted to the master unit (1), the slave unit B (3) or the public base station via the antenna (42). Reference numeral (44) denotes a PLL circuit that changes the transmission and reception frequencies of the reception circuit (41) and the transmission circuit (43).

Reference numeral (45) denotes a channel / voice codec, in which a channel codec (not shown) and a voice codec (not shown) are incorporated in one IC. The channel codec unit performs TDMA / TDD (time division multiple access / time division duplex) processing, CRC error detection, QPSK
Performs demodulation of the system. The audio codec compresses audio
Decompress and convert between analog and digital.

Reference numeral 46 denotes a speaker, which is an amplifying circuit (4).
The electric signal of the channel / audio codec (45) amplified in 7) is converted into audio. Reference numeral (48) denotes a microphone that converts sound into an electric signal. An amplifier circuit (49) amplifies the output of the microphone (48) and outputs it to the channel / speech codec (45).

Reference numeral (50) denotes a control circuit composed of a microprocessor, and a ROM (5) storing an operation program.
Each part is controlled based on 1). Reference numeral (52) denotes a RAM, which is information necessary for the operation of the control circuit (50), for example, the slave unit number (521) of the slave unit A (2) and the public telephone number (52).
2) and a position registration flag (value of variable F) (523) are stored. (53) is a bell, which outputs a ringing tone upon receiving a call. (54) is a liquid crystal display means for displaying a telephone number and the like. Reference numeral (55) denotes an input means for inputting a telephone number and performing an operation of calling the master unit (1) and the slave unit B (3).

Next, the operation of the slave unit A (2) will be described. FIG.
5 is a flowchart showing the operation of the main part of the control circuit (50) of the slave unit A (2). Here, the variable F indicates a position registration flag stored in the RAM (52) of the slave A (2).
= 0 indicates that the flag is not set, that is, a state where the position registration process is required. F = 1 indicates that the flag is on, that is,
Indicates that the location registration process is unnecessary.

First, the control circuit (50) of the slave unit A (2) sets the initial variable F to 0. Then, when a predetermined operation of the slave unit registration is performed (Y in S2), a request is made to the master unit (1) for the slave unit registration process, and the slave unit registration process is performed (S3). This slave unit registration processing is performed based on the PHS standard (RCR STD-28), and the ID of the master unit (1) is assigned to the slave unit A (2), and the ID of the slave unit A (2) is assigned to the master unit ( Registered in 1). After a predetermined time, the control circuit (50) of the child device A (2) requests the parent device to perform a position registration process and performs position registration (S4).

The ID number is an individual number (for example, a manufacturing number) for identifying the device, and the slave unit number is a number for identifying a plurality of slave units registered in the master unit (in this case, the slave unit). A of the machine A and B) of the slave B.

FIG. 4 shows the details of the location registration process. First, the public telephone number (5) is stored in the RAM (52) of the slave unit A (2).
It is checked whether (22) is stored (S11). At this time, if the child device A (2) has not registered the public telephone number with the PHS management station (5), the public telephone number is not stored in the RAM (52). In this case, slave unit A
The control circuit (50) of (2) proceeds to step S14, and transmits only the slave unit number to the master unit (1).

In step S11, if the RAM (52) stores the public telephone number, the child device A (2) is used at the time of location registration.
Causes the public telephone number to be added to the signal (MM location registration request signal) for transmitting the child device number to the parent device (1) (S12). This MM location registration request signal may be given a plurality of numbers according to the PHS standard. Next, the variable F
Is set to 1 (S13), location registration based on the PHS standard is performed (S14), and the location registration processing ends. In this case, the slave unit number and the public telephone number added thereto are transmitted to the master unit (1). If there is data added after the slave unit number, master unit (1) recognizes this as a public telephone number.

When the location registration processing is completed, the slave unit A (2)
The control circuit (50) of the slave unit (2) is a PHS management station (5).
It is checked whether the registration of the public telephone number has been newly performed or has been performed again (S5). This method is performed by comparing the newly entered public telephone number with the public telephone number stored in the RAM (52). When the registration of the public telephone number is newly or performed again (Y in S5), the variable F is set to 0.

If the variable F is 0, the slave A
The control circuit (50) of (2) performs the position registration processing to the parent device (1) again during standby (S7 to S9).

In this way, slave unit A (2) can automatically send the public telephone number to master unit (1) even if the slave unit does not previously store the public telephone number. Also,
When the public telephone number of the child device is changed, the public telephone number stored in the parent device (1) can be automatically updated. Further, the transmission of the public telephone number is performed during standby, so that the call is not interrupted.

Next, the operation of the master unit (1) will be described. FIG. 5 is a flowchart showing the operation of the main part of the control circuit (22) of the master unit (1).

The control circuit (22) of the master unit (1) is
(2) Whether there is a request for slave unit registration from slave unit B (3) (S21), and whether there is a request for location registration from slave unit A (2) or slave unit B (3). (S22),
Then, it is monitored whether or not there is a request to call the slave A (2) or the slave B (3) (S23).

When there is a request for the slave unit registration process in step S21, the control circuit (22) of the master unit (1) performs the slave unit registration process based on the PHS standard (S24).

When there is a request for the location registration process in step S22, the control circuit (22) of the master unit (1) performs the location registration process based on the PHS standard (S25). At this time, M
If the public telephone number is added to the M position registration request signal, the public telephone number is overwritten and stored in the RAM (24).

In step S23, when there is a request to call the slave unit A (2) or the slave unit B (3), for example, when the slave unit A key (272) or the slave unit B key is pressed, the master unit (1) is pressed. The control circuit (22) calls the slave with the slave number (241) of the designated slave (S26). If there is a response from the slave unit (Y in S27), communication processing is performed. If there is no response from the child device (N in S27), the public telephone number (242) of the specified child device is read from the RAM (42) and dialing is automatically performed (S29). If there is a response, communication processing is performed (S31).

In this way, the master unit first attempts to call the slave unit with an inexpensive slave unit number. If the slave unit is located beyond the communication area of the master unit and there is no response from the slave unit, ,
Automatically dial the public telephone number and call the handset. The latest public telephone number is stored by automatic processing of the slave unit.

[0035]

As described above, since the slave unit automatically transmits the public telephone number to the master unit, the master unit can save the trouble of inputting the public telephone number, and further prevents the input error. You can also.

If the slave does not store the public telephone number, the slave automatically stores the public telephone number after the public telephone number is stored. This eliminates the restriction of having to do so.

Further, when the public telephone number of the slave unit is rewritten, the public telephone number is automatically transmitted to the master unit again, so that it is possible to cope with a case where the public telephone number of the slave unit is changed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a main part of a master device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a main part of the slave unit of the embodiment.

FIG. 3 is a flowchart showing the operation of the slave unit.

FIG. 4 is a detailed flowchart of a position registration process of FIG. 3;

FIG. 5 is a flowchart showing the operation of the master unit.

FIG. 6 is a flowchart showing an outline of a cordless telephone system.

[Explanation of symbols]

 Reference Signs List 1 master unit 2 slave unit B 3 slave unit C 4 PHS base station 5 PHS management station 22 master unit control circuit 24 master unit RAM 241 slave unit number (master unit) 242 public telephone number (master unit) 27 input means 271 Handset A key 272 Handset B key 43 Handset transmission circuit 50 Handset control circuit 52 Handset RAM 521 Handset number (handset) 522 Public telephone number (handset) 523 Location registration flag (handset)

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaaki Taniguchi 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (72) Inventor Yabumi Kawaguchi 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tori (56) References JP-A-8-140132 (JP, A) JP-A-9-37314 (JP, A) JP-A-9-163433 (JP, A) JP-A-9-163445 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04M 1/00 H04M 1/66-1/78 H04B ^7/ 24-7/26 H04Q ⁷ /00-7/38

Claims (4)

(57) [Claims] 1. A slave unit has storage means for storing a public telephone number, and control means for performing a location registration process with respect to the base unit,
Even if the parent unit calls the child unit with the child number registered
Call the slave with a public phone number when there is no response from
In the slave unit of the cordless telephone system, the control unit of the slave unit transmits a public telephone number stored in the storage unit to the master unit when performing a location registration process to the master unit. A cordless telephone system slave unit. 2. If the public telephone number is not stored in the storage unit, the control unit of the child device performs a location registration process after the public telephone number is stored, and stores the public telephone number in the parent device. 3. The cordless telephone system according to claim 1, wherein the cordless telephone system is transmitted to the portable telephone. 3. The control unit of the slave unit, when the public telephone number is rewritten, performs a location registration process again and transmits the public telephone number to a master unit.
A cordless telephone system cordless handset according to item 1. 4. The cordless telephone system according to claim 2, wherein the control unit of the cordless handset performs a location registration process during standby and transmits a public telephone number to the master cordless handset. .