JP2002101469A - Master set for cordless telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a master set for a cordless telephone system that can call a PHS slave set even when the PHS slave set is resident at a place at the outside of a communication available area of the master set. SOLUTION: The master set is provided with a RAM 24 that stores a public telephone number of a slave set 2 called via a base station and a slave set number able to call the slave set 2 through direct radio communication and with a control circuit 22 that conducts a 1st step operation (S26) where the slave set 2 is called by a slave set number when the master set 1 calls the slave set 2 (Y in S23) and a 2nd step operation (S29) where the slave set 2 is called by the public telephone number when no reply comes from the slave set 2 even when the slave set 2 is called by the slave set number (N in S27).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base unit of 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.

[0006]

SUMMARY OF THE INVENTION In view of the foregoing, a base unit of a cordless telephone system according to the present invention has been made in view of the above points, and a public telephone number of a sub unit that can be called via a base station and the sub unit are directly wirelessly transmitted. Storage means for storing a callable slave unit number, a first step operation for calling the slave unit with the slave unit number, and a public operation when there is no response from the slave unit even if the slave unit is called by the slave unit number The second to call the cordless handset by phone number
Is provided.

[0007]

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 configuration 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.

Reference numeral 16 denotes a channel / speech codec in which a channel codec (not shown) and a speech 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 for connecting 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).

Reference numeral (22) denotes a control circuit composed of 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. The ROM (5) stores 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 an 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, a 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).

If the RAM (52) has stored the public telephone number in step S11, the slave unit A (2) performs the 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 position 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 shows a control circuit (22) of the master unit (1).
5 is a flowchart showing the operation of the main part of FIG.

The control circuit (22) of the master unit (1) is a slave unit A
(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 regulation (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) 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 the cheap slave unit number, and 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.

The slave unit A key (272) or the slave unit B
The sub unit is called by the key being pressed, but this may be an extension call or a transfer. Furthermore, the handset call may be an incoming call notification that does not require key operation.

[0030]

As described above, according to the present invention, even when the slave unit is located outside the communicable area of the master unit, the slave unit can be called using the public telephone number.

[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]

 DESCRIPTION OF SYMBOLS 1 Base unit 2 Handset B 3 Handset C 4 PHS base station 5 PHS management station 22 Control circuit of base unit 24 RAM of base unit 241 Handset number (base unit) 242 Public telephone number (base 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 Kazuhiko Watanabe 3-201 Minamiyoshikata, Tottori-shi, Tottori Tottori Sanyo Electric Co., Ltd. (72) Inventor Masaaki Taniguchi 3-201 Minamiyoshikata, Tottori-shi, Tottori Sanyo Tottori (72) Inventor Yafumi Kawaguchi 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture F-term (reference) 5K027 AA12 CC08 EE00 5K067 AA25 BB04 BB08 DD13 DD23 DD24 EE04 EE10 HH22 HH23

Claims (1)

[Claims] 1. A storage unit for storing a public telephone number of a slave unit that can be called via a base station and a slave unit number capable of directly calling the slave unit by wireless, and a second unit that calls the slave unit with the slave unit number. Control means for performing the first step operation and the second step operation of calling the slave with the public telephone number when there is no response from the slave even when calling the slave with the slave number. The main unit of the cordless telephone system.