JPH09154175A - Cordless telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the system to simply conduct functions of an automatic answering telephone set and of remote control for other devices through the phone call made from a visiting location to its own home of the user in the case that the system is used for a cordless telephone set through the connection to a master set in its home like a PHS (2nd generation cordless telephone system) and used for a portable telephone set outdoor through the connection to a public base station. SOLUTION: A slave set 10 registered in a master set is used to make a phone call to the user's home via a public base station installed outdoor, and an identification number assigned specifically to the slave set 10 and written in an ID-ROM 22 is converted into a DTMF signal by a DTMF conversion circuit 21 and the signal is sent to the master set. The master set discriminates whether or not the identification number is correct to decide the propriety of a remote function.

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.

[0002]

2. Description of the Related Art In recent years, a cordless telephone system called "second generation cordless telephone system" (PHS) has been put into practical use. This is based on the "Second Generation Cordless Telephone System Standard (RCR-STD28)" issued by the Radio Frequency System Development Center (RCR), and at home, it can be used as a base unit connected to a public line. It can be used as a conventional cordless telephone by performing wireless communication with each other, and can also be used as a mobile phone by performing wireless communication with a public base station installed outdoors. That is, as shown in FIG. 5, the cordless handset 10 is connected to the public line (PST) at home.
N), a call is made with the base unit 30 connected to the base unit 30 via a wireless line, and a wireless communication is made with the public base station 50 outdoors to connect to an exchange (not shown) via the ISDN. By doing so, a call can be made.

In a so-called cordless telephone system, since the slave unit wirelessly communicates with the master unit, the master unit determines whether or not the slave unit which is about to make a call is correct prior to the call. There is a need. Therefore, conventionally, an identification number is individually given to each child device, and the identification number is also registered on the parent device side to judge whether the identification number sent from the child device is correct prior to the call. Is configured.

By the way, most of the telephones currently installed in the home have a so-called answering machine function. That is, when a call is received while the user is away, a message indicating that he / she is out is sent to the line, and the message of the caller can be recorded. In such an answering machine, for example, Japanese Patent Laid-Open No. 63-3774.
As described in Japanese Patent Publication No. 9 (H04M1 / 65), it is also proposed that the user can call his / her house from outside and check the recorded message or delete the recorded message. ing. Such a function is called a remote function, and it is possible to perform various operations by pre-registering a personal identification number on a home telephone and allowing the user to enter the personal identification number from a telephone when out of the office. It is a thing.

[0005]

In order to realize the above-mentioned remote function of the prior art, the user must register the personal identification number in the telephone at home and input the personal identification number from outside. . Such a personal identification number is usually composed of a combination of three or four digits, and there is a tendency that an easy-to-remember number such as a telephone number or date of birth is selected. However, a number that is easy for the user to remember is easily stolen by another person, and as a result, it may be mischievous. In addition, although it is unlikely that a random combination of numbers will be known to others, there is a drawback that it is easy to forget.

In view of the above-mentioned conventional techniques, the present invention is capable of controlling a base unit installed in a home without registering a personal identification number or inputting the personal identification number from outside. It provides a cordless telephone system that can be used.

[0007]

According to the present invention, a call is made through a public line by performing wireless communication between a master unit connected to a public line and installed in a home and the master unit. And a slave unit capable of making a call by wirelessly communicating with a public base station installed outdoors, the slave unit having a unique identification number,
The unique identification number of the child device is registered in the parent device,
In a cordless telephone system in which the master unit is configured to determine whether the identification number transmitted from the slave unit matches the registered identification number prior to making a call, the slave unit is configured to communicate via a public base station. It is characterized by having an operation button for converting at least a part of the identification number into a DTMF signal and transmitting it.

According to the present invention, the master unit determines whether or not the DTMF signal sent through the public line matches the identification number of the registered slave unit, and only when the DTMF signal matches, the operation from the slave unit is performed. It is characterized by permitting control of the master unit.

Furthermore, the present invention is characterized in that the base unit has an answering machine function, and the permitting control is the answering machine function.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a cordless telephone system according to the present invention, which is based on the Radio Wave System Development Center (RCR).
Published by "Second Generation Cordless Telephone System Standard (R
It is a block diagram showing the configuration of the main part of the handset 10 when applied to a digital cordless telephone (PHS) compliant with "CR-STD28)", in which 11 is an antenna for transmitting and receiving radio waves, and 12 is an antenna. An RF / IF unit that performs frequency conversion of radio signals transmitted and received by the antenna 11,
13 is a modulator / demodulator that performs π / 4 shift 4-phase QPSK modulation and demodulation, 14 is a digital signal processing circuit that performs TDMA signal processing, and 15 is an analog voice signal from the transmission microphone 16.
And ADPCM / PCM conversion of the digital audio signal output from the digital signal processing circuit 4, and D / A, A
A voice signal processing circuit that performs D / D conversion, and the transmitting microphone 1
In addition to 6, the receiving speaker 17 and the ringer speaker 18 are connected.

Reference numeral 19 denotes a control circuit, which sends and receives a control data signal to and from the digital signal processing circuit 4, and based on this control data, the control circuit 19 makes and receives calls to and from the master unit and the base station. Carry out protocols such as calls. Reference numeral 20 denotes an operation unit, which is a numeric keypad 20a from "0" to "9", "*"
It has a key 20b and a "#" key. 21 is DTM
This is an F conversion circuit, which converts the operation of the operation unit 20 into a DTMF signal under the control of the control circuit 19 and transmits the DTMF signal via the audio signal processing circuit 15. Reference numeral 22 is an ID-ROM in which the ID data (PSID) unique to the slave unit is written at the time of factory shipment. The PSID is composed of 28-bit binary data in the above standard. Reference numeral 23 is an ID memory, which is an ID unique to the master unit when registering the slave unit 10 in a specific master unit.
(CSID) is recorded. Reference numeral 24 denotes a personal identification button, and by operating this button, the personal identification data converted into a DTMF signal by the DTMF conversion circuit 21 is transmitted based on the ID data unique to the child device 10 written in the ID-ROM. .

FIG. 2 is a block diagram showing the configuration of the master unit 30 of the cordless telephone device according to the present invention. 3 in the figure
1 is an antenna for transmitting and receiving radio waves, 32 is an antenna 3
RF for frequency conversion of radio signals transmitted and received in 1
/ IF section, 33 is a modulation / demodulation section for performing π / 4 shift four-phase QPSK modulation and demodulation, 34 is a digital signal processing circuit for performing TDMA signal processing, and 35 is an analog voice signal sent from a telephone line, and a digital signal processing circuit 34. An audio signal processing circuit that performs ADPCM / PCM conversion and D / A, A / D conversion of the digital audio signal output from the digital audio signal. 36 is a line connection at the time of making a call and processing such as incoming call detection. A line control circuit for interfacing between the signal processing circuit 35 and the telephone line.

Reference numeral 37 denotes a control circuit, which sends and receives a control data signal to and from the digital signal processing circuit 34, and executes a protocol such as an outgoing call and an incoming call with the handset 10 based on the control data. . Numeral 38 is an answering machine circuit, which is recorded in the message memory 39 in advance in response to an incoming call when the base unit 30 is set to the answering machine mode when the user goes out. An answering message such as "Please." Is sent to the line, and the message of the caller sent through the line thereafter is recorded in the message memory 39. 40 is DTMF
Signal detection circuit, DTM sent through the line
The F signal is received and converted into data, and the operation described later is performed in cooperation with the answering machine circuit 38 and the control circuit 37.

Reference numeral 41 is a slave unit registration button, and 42 is an ID-in which an ID (CSID) individually determined for the master unit 30 is written.
ROM and 43 are ID memories in which the IDs of the slaves registered in the master 30 are recorded. When registering the child device 10 in the parent device 30, the child device registration button 40 is operated. That is, the child device 10 is brought closer to the parent device 30 and the parent device 30
Side operates the handset registration button 40, and the handset 10 side operates the operation unit 20.
By performing a combination operation of the operation buttons of, the slave unit is registered. In the slave registration state, the master 30 stores the ID (PSID) of the slave sent from the slave 10 in the ID memory 4
2, the slave unit 10 receives the ID (CSID) of the master unit transmitted from the master unit 30, and the ID memory 23
To record. Only after the registration of the child device 10 is completed, the child device 10
Can make a call via the master device 30.

An external device interface 44 is connected to the external device connection terminal 45 and interfaces with devices such as lighting equipment, air conditioners, and VTRs.

Next, the operation of the cordless telephone device according to the present invention will be described. FIG. 3 is a diagram showing an operation sequence of the cordless telephone system of the present invention. The child device 10 is the parent device 3
It is assumed that the base unit 30 is registered in 0 and the base unit 30 is set in the answering machine mode, and when the user goes out, calls the home via the public base station and checks the message message already recorded during the absence. It shall be.

First, the handset 10 makes a call to the base unit 30 at home, which is set to the answering machine mode, from the outside via the public base station (STEP 1). When the base unit 30 receives this, it is recorded in the message memory 39 under the control of the answering machine circuit 38.
Please give your name and requirements. Message is sent to the line (STEP 2). Next, the user operates the password button 24. As a result, the handset 10 reads the ID (PSID) unique to the own station written in the ID-ROM 22. The PSID is a 28-bit binary number, and the control circuit 1
9 converts this into a decimal number and sends the last 4 digits to the DTMF conversion circuit 21. The DTMF conversion circuit 21 converts the four-digit decimal number into a DTMF signal and sends it to the base unit 30 through the line (STEP 3).

This DTMF signal is detected by the DTMF signal detection circuit 40 of the base unit 30, converted into numerical data, and then sent to the control circuit 37 via the answering machine circuit 38. The control circuit 37 converts the PSID of the child device 10 recorded in the ID memory 43 into a decimal number, and the lower four digits,
This received numeric data is compared, and if they match, a message "The password has been confirmed. Please perform remote operation." Is sent to the handset 10 (STE.
P4).

In response to this, the user performs remote operation using the operation unit 20. The remote operation is, for example, as shown in FIG. 4, and each time these operations are performed,
A DTMF signal corresponding to the operation button is sent to the master device 30, and in response to this, the master device 30 performs a predetermined remote operation, and when the remote operation is for an externally connected device, an external device interface is used. The device connected to the external device connection terminal 45 is controlled via 44 (STEP 5). After that, the sequence is ended by the disconnection operation from the handset 10 (STEP 6).

As described above, in the cordless telephone system according to the present invention, whether or not the remote operation is possible is determined based on the identification number unique to the child device.

In this embodiment, the PSID is converted into a decimal number and the last four digits are used as the secret code number. However, the present invention is not limited to this, and the result of performing a predetermined operation on the PSID is as follows. May be used as the personal identification number.

[0022]

As described above, the cordless telephone system according to the present invention does not require the user to bother to register the personal identification number or to remember it, so that the operability is extremely good. . Further, even when controlling an external device such as a light or an air conditioner from outside, the personal identification number of the telephone system according to the present invention is based on the identification number uniquely given to the handset, and there is no fear of being known to others. A telephone system with high security and safety can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a child device of a telephone system according to the present invention.

FIG. 2 is a block diagram showing an embodiment of a base unit of the telephone system according to the present invention.

FIG. 3 is a control sequence diagram showing the operation of the present invention.

FIG. 4 is a diagram illustrating a remote function of the present invention.

FIG. 5 is a diagram illustrating the operation of PHS.

[Explanation of symbols]

 10 Handset 19 Control circuit 20 Operation part 20a Numeric keypad 21 DTMF conversion circuit 22 ID-ROM 23 ID memory 24 Security code button 30 Master unit 37 Control circuit 38 Answering machine Telephone circuit 40 DTMF signal detection circuit 42 ID-ROM 43 ID memory 44 External device The interface

Claims (4)

[Claims] 1. A base unit connected to a public line and installed in a home, and by performing wireless communication between the base unit, a call can be made through the public line and the unit is installed outdoors. It is composed of a slave unit capable of making a call by performing wireless communication with a public base station, the slave unit has a unique identification number, and the master unit master unit is unique to the slave unit. In the cordless telephone system in which the identification number is registered and the master unit is configured to determine whether the identification number transmitted from the slave unit matches the registered identification number prior to the call, the slave unit is A cordless telephone system having an operation button for converting at least a part of the identification number into a DTMF signal for transmission via a public base station. 2. The master unit is a D sent through a public line.
The control of the master unit is permitted by an operation from the slave unit only when it is determined whether the TMF signal matches the registered identification number of the slave unit. Cordless telephone system. 3. The cordless telephone system according to claim 2, wherein the base unit has an answering machine function, and the permission control is the answering machine function. 4. The master unit has an answering machine function, and the permitting control is ON / OFF control of an external device connected to the master unit via the interface circuit. Cordless phone