JP2002209263A - Cordless phone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cordless phone system that can smoothly reconnect a cordless slave unit and a main RF section for external line connection when the cordless slave unit connected to a sub RF section exclusively used for inter- slave-unit communication is going to receive an external line call in the case of communication between the slave units. SOLUTION: In the case of communication between the slave units, when the cordless slave units 103, 104 connected to the sub RF section 108 exclusively used for inter-slave-unit communication are going to receive an external line call, while the cordless slave units 103, 104 maintain a sub RF channel used by the sub RF section 108 for wireless communication with the cordless slave units 103, 104 in the case of communication between the slave units, a channel used by the main RF section 106 is switched into the sub RF channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone device having a plurality of slave terminals and a master terminal.

[0002]

2. Description of the Related Art Conventionally, there is a cordless telephone device provided with a plurality of slave terminals and a master terminal. This cordless telephone device is provided with a main RF unit that performs wireless communication such as exchange of commands between the slave terminal and the master terminal when the slave terminal receives an outside line. In addition, this cordless telephone device performs wireless communication between a called slave terminal and the master terminal when extension communication from one slave terminal to another slave terminal via the master terminal is performed. And a sub-RF unit for connecting the calling handset terminal to the called handset terminal. The sub-RF unit is used only when performing this extension communication (communication between slave terminals).

[0003] In other words, the main RF unit is used when receiving an external line, so it can be called an RF unit for external line connection. Further, since the sub-RF unit is used only when communication is performed between slave terminals, it can be said that the RF unit is dedicated to communication between slave terminals.

[0004] Next, the plurality of cordless slave terminals are:
The operation at the time of communication between slave terminals via the master terminal will be described.

First, one slave terminal sends various information to the main RF unit by wireless communication. Next, the sub RF
Give this information to the department. Then, an operation of transmitting various information from the sub RF unit to the other slave terminal by wireless communication is performed. In this way, the main R
By transmitting various kinds of information to the slave unit terminal on the called side via the F unit and the sub-RF unit, communication between the slave unit terminals is performed.

When an incoming call is received from an outside line during communication between the slave terminals, the slave terminal using the main RF unit receives the incoming call. When an incoming call is to be received by a slave terminal using the sub RF unit, the RF unit used by the slave terminal is switched from the sub RF unit to the main RF unit to receive an incoming call.

[0007]

However, conventionally, when a terminal device using a sub RF unit is switched to use the main RF unit, the sub RF unit and the sub RF are used (the called terminal side). ) It is necessary to disconnect the wireless connection state with the slave terminal.

As described above, the wireless connection state between the slave terminal using the sub RF unit and the sub RF unit is temporarily disconnected, and the main R
When reconnecting to the F section, an abnormal sound occurs in the reception sound of the slave terminal. In addition, the process of disconnecting the wireless connection state and switching the RF unit connected to the slave terminal from the sub RF unit to the main RF unit requires a certain amount of time, which causes a problem of giving the user a sense of discomfort. is there.

[0009] The present invention has been made in view of the above point, and a sub-R dedicated to communication between slave terminals during communication between slave terminals.
To provide a cordless telephone device capable of smoothly reconnecting a sub-terminal and a main RF unit for external line connection when an external line is to be received by a sub-terminal connected to an F-part. With the goal.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a sub-terminal connected to a sub-RF unit dedicated to communication between sub-terminals is intended to receive an external line during communication between sub-terminals. When the sub-RF unit maintains the sub-RF channel used by the sub-RF unit for wireless communication with the sub-sub terminal during communication between the sub-terminals, the channel used by the main RF unit is set to the sub-RF This is to switch to a channel.

[0011] Thus, the slave terminal that is going to receive an outside line can be smoothly connected to the RF unit for receiving an outside line.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cordless telephone device according to a first aspect of the present invention includes a plurality of slave terminals for wireless communication with a master terminal, and the plurality of slave terminals are connected via the master terminal. A main RF unit that performs wireless communication between the master terminal and the slave terminal when performing communication between slave terminals and when the slave terminal performs external line communication; and when performing communication between slave terminals. Only a sub-RF unit for performing wireless communication between the master terminal and the slave terminal, and an external line using a sub-slave terminal performing wireless communication using the sub RF unit during communication between the slave terminals. When an incoming call is received, the sub-RF
The channel used by the main RF unit is switched to the sub RF channel while the sub RF terminal maintains a sub RF channel used by the unit for wireless communication with the sub child terminal. And an RF switching unit.

With this configuration, the channel used by the main RF unit can be switched to the sub-RF channel while the slave terminal connected to the sub-RF unit maintains the sub-RF channel. Thereby, even when an attempt is made to receive an external line at the sub-terminal during the communication between the sub-terminals, the radio connection between the sub-terminal and the sub-RF unit and the main RF unit can be maintained without disconnecting the sub-terminal. Machine terminal as main RF
Can be connected to the unit. As a result, the sub-slave terminal can be smoothly connected to the main RF unit even if an attempt is made to receive an external line at the sub-slave terminal during communication between the slave terminals. Thus, an external line can be received even with the sub-child device terminal without giving the user a feeling of strangeness.

According to a second aspect of the present invention, in the cordless telephone device according to the first aspect, the RF switching means comprises:
When receiving an external line at the sub-child terminal during communication between the child terminals, a period from when the sub-child terminal receives an external line until the main RF unit finishes setting up a carrier on the sub-RF channel. , A mute signal is sent to the main RF unit and the sub RF unit.

With this configuration, the sub-slave terminal can be set to the mute state during the process of reconnecting the sub-slave terminal to the main RF unit. This prevents a noise sound from being output from the sub-child device during this processing. As a result, the user using the sub-child terminal can be prevented from hearing the noise sound, so that it is possible to prevent the user from feeling uncomfortable.

According to a third aspect of the present invention, there are provided a plurality of slave terminals for performing wireless communication with the master terminal, a case where the plurality of slave terminals perform communication between the slave terminals via the master terminal, and A main RF unit for performing wireless communication between the master terminal and the slave terminal when the slave terminal performs external line communication, and the master terminal and the slave only when performing communication between the slave terminals; A wireless control method for a cordless telephone device, comprising: a sub-RF unit that performs wireless communication between terminals; and a sub-child device that performs wireless communication using the sub-RF unit during communication between the child terminals. In the case of receiving an outside line by using the sub-terminal, the sub-RF terminal maintains the sub-RF channel used by the sub-RF unit for wireless communication with the sub-sub-terminal during communication between the sub-terminals. In this state, the channel used by the main RF unit is set to the A radio control method of a cordless telephone apparatus and switches on the RF channel.

Hereinafter, a cordless telephone device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram of the cordless telephone device according to the above embodiment.

The cordless telephone device 101 of the present invention comprises a base terminal 102, which is a base terminal, and a plurality of cordless handsets 103 and 104.

The configuration of master terminal 102 will be described below. The master terminal 102 is provided with a CPU 114 for performing predetermined processing according to a program stored in the storage means. Further, master terminal 102 is provided with a ROM 113 as a non-volatile storage unit and a RAM 105 as a volatile storage unit as storage units. ROM1
13 stores various programs, various initial settings, and the like. The RAM 105 is a work memory of the CPU 114, and programs and the like are downloaded.

The main terminal 102 has a main RF unit 106, a sub RF unit 108, a main radio control unit 107, and a sub radio unit, which are radio communication means for controlling radio communication with the cordless handsets 103 and 104. A control unit 109 is provided.

The main RF unit 106 sends various commands to the cordless slave units 103 and 104 when one of the cordless slave units 103 and 104 performs wireless communication with the base unit terminal 102, Slave unit 103,
The command sent from the server 104 is detected. The main RF unit 106 includes the cordless handset 103,
When an external call is made from the cordless handset 104, various commands are sent to the cordless cordless handsets 103 and 104, and the commands sent from the cordless cordless handsets 103 and 104 are detected.

The main RF unit 106 is connected to the master terminal 102.
For example, when performing extension communication (hereinafter referred to as communication between slave units) between the cordless slave units 103 and 104 via the cordless slave units 103 and 104, the cordless slave units 103 and 104 attempting to start communication between the slave unit terminals (calls) First, various commands are sent to the cordless handsets (main cordless handsets) 103 and 104 that start wireless communication with the base unit terminal 102 first, and commands transmitted from the main cordless handsets 103 and 104 are transmitted. Detect.

On the other hand, when performing communication between the slave terminals, the sub-RF unit 108 cordlessly starts the wireless communication with the master terminal 102 (sub-cordless slave units) 103 and 104. That is, various commands are sent to the cordless handsets 103 and 104 of the extension call destination, and the commands sent from the sub-cordless handsets 103 and 104 are detected.

In other words, since the main RF unit 106 is used when an external line is received, it can be called an RF unit for connecting to an external line. In addition, since the sub RF unit 108 is used only when communication is performed between slave terminals, it can be said that the RF unit is dedicated to communication between slave terminals.

The main radio control unit 107 is a radio control unit that operates in accordance with an instruction from the CPU 114.
Command to be sent to the main RF unit 10
It analyzes the command sent from 6, and sets up or reduces the carrier used for wireless communication.

The sub-radio control unit 109 is a radio control unit that operates in accordance with an instruction from the CPU 114.
Command to be sent to the
It analyzes the command sent from the unit 108, sets up a carrier to be used for wireless communication, and sets aside.

The base unit terminal 102 is provided with an NCU unit 110 and a receiver 111 which function as a telephone device. The NCU unit 110 controls communication with another telephone device via the PSTN.

The facsimile unit 112 is provided in the master terminal 102 so as to also function as a facsimile machine. The facsimile unit 112 includes an image reading unit, an image recording unit, a facsimile modem, and the like.

As described above, the cordless telephone device 101 is capable of communication between slave terminals. The cordless telephone device 101 can communicate with an external line using the cordless child devices 103 and 104 when an incoming call is received from an external line during communication between the child terminal devices.

However, the sub-RF unit 108 is used only in the case of communication between handset terminals, and when the cordless handset 103 or 104 receives an outside line, the main RF unit 106 must be used. It is not going to be. For this reason, when an attempt is made to receive an outside line at the cordless handset (sub cordless handset) 103, 104 connected to the sub RF unit 108, the sub cordless handset 10
3, 104 need to be reconnected to the main RF unit 106.

Conventionally, the sub-cordless handsets 103 and 104 connected to the sub-RF
To connect to the sub cordless handset 103, 1
After the connection between the sub-cordless handset 04 and the sub-RF unit 108 is disconnected, the sub-cordless handsets 103 and 104 are reconnected to the main RF unit 106. For this reason, when the connection is switched as described above, abnormal noise is generated in the sub-cordless handsets 103 and 104, and the switching takes time.

Therefore, the present invention provides a sub cordless handset 1
03 and 104, while maintaining the channel used for wireless communication with the sub RF unit 108, the main RF unit 106
Is used by the sub RF unit 108, the sub cordless handset 103, 1
04 and the main RF unit 106 or the sub RF unit 108
In other words, without disconnecting the wireless connection with the master terminal 102,
It focuses on the fact that it can be connected to the main RF unit 106.

The process of reconnecting the cordless handset according to the above embodiment from the sub RF unit to the main RF unit will be described in detail. In the above embodiment, the processing as the RF switching means for performing such connection switching is performed by the CPU.
114 has gone. First, the function of the CPU 114 will be described with reference to FIG. FIG. 2 is a functional block diagram of the cordless telephone device according to the embodiment.

The CPU 114 is provided with a control section 200 for controlling various processing sections provided in the CPU 114. The control unit 200 also controls transmission and reception of information between the various processing units and the main wireless control unit 107 and the sub wireless control unit 109.

The CPU 114 includes an NCU 110
An incoming call detection unit 201 for detecting the presence or absence of an incoming call from an outside line based on the information sent from is provided. When detecting an incoming call on an outside line, the outside line incoming detection unit 201 sends a notification to that effect to the control unit 200.

The CPU 114 includes an NCU unit 110.
A communication processing unit 202 is provided, which performs predetermined processing on the information sent from the server and sends the information to the control unit 200. Then, control section 200 sends the transmitted information to cordless handsets 103 and 104 via main radio control section 107 and main RF section 106. The communication processing unit 202 also transmits information from the cordless handsets 103 and 104 transmitted via the main RF unit 106, the main wireless control unit 107, and the control unit 200 to the NCU unit 1.
Send to 10. As described above, the communication processing unit 202
It functions as an interface between the unit 110 and the cordless handsets 103 and 104.

In the CPU 114, the cordless slave units 103 and 104 are connected to the master terminal 102, that is, the main RF unit 10
6 or a channel management unit 203 for managing a channel used for wireless communication with the sub RF unit 108. The channel management unit 203 includes the communication processing unit 2
02, the cordless handset 103, 1
04 determines a channel to be used when wirelessly communicating with base unit terminal 102.

Further, the CPU 114 provides the main RF unit 106 or the sub RF unit 1 from the cordless handsets 103 and 104.
08, main radio control section 107 or sub radio control section 10
9. A catch detection unit 204 for detecting a catch signal sent via the control unit 200 is provided. The catch detection unit 204 sends the detection result to the control unit 200.
Note that the catch signal refers to the cordless slave units 103, 10
4 tries to receive an outside line, the cordless handset 10
Signals 3 and 104 are signals to be sent to the master terminal 102.

The CPU 114 controls the cordless handsets 103 and 104 to control the control unit 2 under the control of the control unit 200.
00, main radio control unit 107 or sub radio control unit 10
9. A mute sending unit 205 for sending a mute signal via the main RF unit 106 or the sub RF unit 108 is provided.

The CPU 114 controls the cordless handsets 103 and 104 to control the control unit 2 under the control of the control unit 200.
00, main radio control unit 107 or sub radio control unit 10
9. There is provided a channel maintenance transmission section 206 for transmitting a channel maintenance signal for maintaining the currently used channel via the main RF section 106 or the sub RF section 108.

The CPU 114 controls the cordless handsets 103 and 104 to control the control unit 2 under the control of the control unit 200.
00, main radio control unit 107 or sub radio control unit 10
9, via the main RF unit 106 or the sub RF unit 108,
A carrier disconnection unit 207 that transmits a carrier disconnection signal for disconnecting the carrier from the main RF unit 106 or the sub RF unit is provided.

Next, the operation of reconnecting the cordless handset according to the above embodiment from the sub RF unit to the main RF unit will be described with reference to FIGS. FIG. 3 shows that the cordless handset according to the above-mentioned embodiment is
It is a process sequence diagram which reconnects to F part. FIG. 4 is a processing flowchart for reconnecting the cordless slave according to the above-described embodiment from the sub RF unit to the main RF unit.

In the present embodiment, the cordless handset 104
Is used as a sub-cordless handset connected to the sub RF unit 108, and the cordless handset 103 is used as a main cordless handset connected to the main RF unit 106. Therefore,
Hereinafter, a description will be given by giving 103 to the main cordless slave and 104 to the sub cordless slave. Here, it is assumed that the cordless handset 103 and the main RF unit 106 are connected, and the cordless handset 104 and the sub RF unit 108 are connected. However, the cordless handset 104 and the main RF unit 106, and the cordless handset 103 and the sub RF unit are connected. The unit 108 may be connected.

First, as shown by 300 in FIG. 3, by connecting the main cordless handset 103 and the main RF unit 106 and connecting the sub cordless handset 104 and the sub RF unit 108, the main cordless handset 103 and the sub RF unit 108 are connected. Communication (call) between the cordless slave unit 104 and the slave terminal via the master terminal 102 (ST401). At this time, a channel used for communication between the main cordless handset 103 and the main RF unit 106 and a channel used for communication between the sub cordless handset 104 and the sub RF unit 108 are managed by the channel management unit 203. I have.

Next, the outside line incoming call detecting unit 201
10 to detect whether there is an incoming call from an outside line (ST402). Then, when the outside line incoming detection unit 201 receives an outside line, 301 in FIG.
As shown in FIGS. a and 301b, the outside line incoming detecting unit 201 is controlled by the main RF unit 10 via the control unit 200 and the main wireless control unit 107.
6 and the sub RF unit 1 via the sub radio control unit 109.
08 is notified that an outside line has been received. And FIG.
As shown in 302a and 302b in FIG.
Notifies the main cordless handset 103 and the sub RF unit 108 notifies the sub cordless handset 104 that an outside line has been received. Specifically, the cordless handset 103, 1
04 is notified by a superimposed sound that an outside line has arrived.

Next, as indicated by reference numeral 303 in FIG. 3, the sub-cordless handset 104, that is, the cordless handset attempting to receive an outside line in this case catches the sub-RF unit 108 in order to receive an outside line. Send a signal. Then, a catch signal is exchanged between the sub cordless handset 104 and the sub RF unit 108. Then, as shown at 304 in FIG. 3, the catch detection unit 204
A catch signal received by sub RF section 108 via sub wireless control section 109 is detected (ST403). In this manner, master terminal 102 is connected to sub-cordless slave 104
Recognizes that he is trying to receive an outside line.

Next, the cordless telephone device 101
The process proceeds to the channel switching operation of the F unit 106 and the sub RF unit 108.

First, as shown by 305a in FIG. 3, the mute sending unit 205 sends the main RF signal through the main radio control unit 107.
A mute signal is transmitted to the unit 106. Also, 3 in FIG.
As shown in 05b, mute sending section 205 sends a mute signal to sub RF section 108 via sub radio control section 109 (ST404). This is because the noise sound generated during the channel switching operation between the main RF unit 106 and the sub RF unit 108 is not sent to the cordless handsets 103 and 104. Thereby, it is possible to prevent the cords cordless handsets 103 and 104 from generating abnormal noise. As a result, it is possible to prevent the user from feeling uncomfortable.

Next, the sub-cordless handset 104 maintains the mute state, and shifts to processing for maintaining the currently used channel.

First, as indicated by reference numeral 306 in FIG. 3, the mute transmitting section 205 continues to transmit a mute signal to the sub RF section 108 via the sub radio control section 109 at regular intervals, and the channel maintaining transmitting section 206 RF unit 108
A channel maintenance signal for maintaining the currently used channel.

Next, as shown by 307a to 307e in FIG. 3, the sub RF unit 108 which has received the mute signal and the channel maintenance signal transmits the mute signal to the sub cordless handset 104 which tries to receive an outside line at a fixed interval. Keep sending. Further, channel maintaining and transmitting section 206 continues to transmit a channel maintaining signal for maintaining the currently used channel to sub cordless handset 104 at regular intervals (ST405). Specifically, the sub RF unit 108
A mute signal and a channel maintenance signal are transmitted to the sub cordless handset 104 every two seconds.

This is a specification of the cordless telephone device 101. If the mute signal and the channel maintaining signal do not come to the sub cordless handset 104 even after 2 seconds, the sub cordless handset 104 releases these states. It is because. Note that, depending on the specifications of the cordless telephone device 101, a mode in which the mute signal and the channel maintenance signal are not continuously transmitted may be adopted.

Next, the cordless telephone device 101
The process proceeds to a process of disconnecting the connection between the F unit 106 and the main cordless handset 103.

Specifically, as shown at 308 in FIG. 3, carrier disconnecting section 207 of master terminal 102 sends a carrier disconnection signal to main RF section 106 via main radio control section 107 (see FIG. 3). ST406). Next, 309 in FIG.
As shown in a to 309f, the main RF unit 106 that has received the carrier disconnection signal transmits the carrier disconnection signal to the main cordless child device 103 six times in a row. The reason why the carrier disconnection signal is transmitted six times in succession is that the main R
This is for surely disconnecting the wireless connection between the F unit 106 and the main cordless handset 103.

Next, control section 200 determines whether main RF section 106 and main cordless handset 103 have been disconnected (ST).
407) If it is determined that the connection has been disconnected, the process proceeds to the channel switching process of the main RF unit 106.

That is, the main RF unit 106 and the sub RF unit 10
In order to connect the sub-cordless handset 104 connected to No. 8, the sub-RF unit 108 and the sub-cordless handset 104 used the channel used by the main RF unit 106 for the wireless communication from the current channel. Change to a channel (sub RF channel).

More specifically, as indicated by 310 in FIG. 3, the channel management unit 203 of the master terminal 102
A carrier ON signal for turning on the carrier in the channel (sub RF channel) used by sub RF section 108 is transmitted to F section 106 (ST408).

Then, as shown by 311 in FIG. 3, when the setting of the main RF unit 106 to turn on the carrier in the channel used by the sub RF unit 108 is completed, the main RF unit 1
Reference numeral 06 indicates to the control unit 200 that the change of the channel and the setting of the carrier ON in the changed channel are completed. Then, the control unit 200 receives a signal indicating that the setting is completed from the main RF unit 106, and thereby the main RF unit 1
It is determined that the carrier has been turned on in the channel changed by ST06 (ST409).

In this way, the main RF unit 106
By turning on the carrier in the channel of the F unit 108, the sub cordless handset 104 and the main RF unit 106 are connected.

However, if the mute of the sub cordless handset 104 is released in this state, the sub cordless handset 104 will be connected to both the main RF unit 106 and the sub RF unit 108. Therefore, next, the operation shifts to the operation of turning off the carrier of the sub RF unit 108 so that the sub cordless handset 104 is not connected to the sub RF unit 108.

Specifically, as indicated by reference numeral 312 in FIG. 3, the carrier disconnecting section 207 sends the carrier OFF signal to the sub RF section 108 via the sub radio control section 109 so that the sub RF section 108 turns off the carrier. (ST
410). Then, the sub RF unit 108 that has received the carrier OFF signal performs a carrier disconnection process. Then, upon completion of the carrier disconnection process, the sub RF unit 108 sends a signal indicating that the sub RF unit 108 has turned off the carrier to the control unit 200 as indicated by 313 in FIG. Then, when control section 200 receives this signal (ST411), base station terminal 102 causes sub RF section 10
It is determined that No. 8 has turned off the carrier.

In this manner, the sub cordless handset 104 connected to the sub RF unit 108 and the main RF unit 106
Are connected without crosstalk.

Next, as shown at 314 in FIG. 3, master terminal 102 transmits and receives various commands between main RF unit 106 and sub RF unit 108, Then, a route is set to the server 108 (ST412).

Then, after transmitting the mute signal and the channel maintaining signal from the sub RF unit 108 to the sub cordless handset 104 as indicated by 307f in FIG. 3, the control unit 200 returns to the state indicated by 315 in FIG. Thus, a mute release signal is transmitted to main RF section 106 and sub RF section 108 (ST413).

In this manner, sub cordless handset 10
4 and the main RF unit 106 are connected using the channel previously used between the sub-cordless handset 104 and the sub-RF unit 108 during the communication between the handset terminals (ST41).
4). As a result, as shown at 316 in FIG. 3, the sub-cordless handset 104 can communicate (call) via the main RF unit 106.

As described above, according to the above-described embodiment, sub-cordless handset 104 maintains the sub-RF channel used for radio communication with sub-RF section 108 during communication between handset terminals. The main RF unit 106
Can be switched to a sub-RF channel. Thereby, even when the sub-cordless handset 104 attempts to receive an incoming call during communication between the handset terminals, the wireless connection between the sub-cordless handset 104 and the sub RF unit 108 and the main RF unit 106 is disconnected. The sub-cordless handset 104 can be connected to the main RF unit 106 without any need. As a result, even if the sub-cordless handset 104 using the sub-RF unit 108 attempts to receive an outside line during communication between the handset terminals, the sub-cordless handset 104 can be smoothly connected to the main RF unit 106 again. This allows
The sub-cordless handset 104 can also receive an incoming call without giving the user a sense of discomfort.

Further, according to the above-described embodiment, during the process of reconnecting sub cordless handset 104 to main RF unit 106, sub cordless handset 104 can be muted. As a result, during this process, the sub-cordless handset 10
4 prevents noise noise from being output. As a result, it is possible to prevent the user using the sub-cordless handset 104 from hearing the noise sound, thereby preventing the user from feeling uncomfortable.

In the above embodiment, the control unit 200, the channel management unit 203, and the catching unit are RF switching means for switching the RF unit connected to the sub cordless handset 104 from the sub RF unit 108 to the main RF unit 106. The functions of the detection unit 204, the mute transmission unit 205, the channel maintenance transmission unit 206, and the carrier disconnection unit 207 are
Although described in the form of the PU 114, each of these RF switching units may be configured by individual hardware.

[0069]

As described above, according to the present invention,
When an external line is to be received by a sub-terminal connected to the sub-RF unit dedicated to communication between the sub-terminals during communication between the sub-terminals, the channel used by the main RF unit for external line connection is set to the sub-RF unit. Switches to the channel used by the sub RF unit and the sub RF terminal connected to the sub RF unit and the main RF
It is possible to smoothly reconnect the unit.

[Brief description of the drawings]

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

FIG. 2 is a functional block diagram of the cordless telephone device according to the embodiment.

FIG. 3 is a processing sequence diagram for reconnecting the cordless cordless handset from the sub RF unit to the main RF unit according to the embodiment.

FIG. 4 is a processing flowchart for reconnecting the cordless slave according to the embodiment from the sub RF unit to the main RF unit;

[Explanation of symbols]

 Reference Signs List 101 cordless telephone device 102 base unit terminal 103, 104 cordless handset 106, 108 RF unit 107, 109 radio control unit 110 NCU unit 114 CPU 200 control unit 201 external line incoming detection unit 202 communication processing unit 203 channel management unit 204 catch detection unit 205 Mute transmission unit 206 Channel maintenance transmission unit 207 Carrier disconnection unit

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tsuyoshi Obita 2-3-8 Shimomeguro, Meguro-ku, Tokyo Matsushita Electric Transmission System Co., Ltd. F-term (reference) 5K027 AA12 CC08 EE00 5K067 AA21 BB08 DD11 DD13 EE02 EE10 FF35 FF36 GG11 HH05 JJ35

Claims (3)

[Claims] 1. A plurality of slave terminals for performing wireless communication with a master terminal, a case where the plurality of slave terminals perform communication between the slave terminals via the master terminal, and a case where the slave terminal performs external line communication. And a main RF unit that performs wireless communication between the master terminal and the slave terminal, and performs wireless communication between the master terminal and the slave terminal only when performing communication between the slave terminals. Sub R
F section, when receiving an external line using a sub-child terminal performing wireless communication using the sub-RF part at the time of communication between the child terminal, the sub-RF part at the time of communication between the child terminal The channel used by the main RF unit is set to the sub RF while the sub RF terminal is maintaining the sub RF channel used for wireless communication with the sub child terminal.
And a RF switching means for switching to a dedicated channel. 2. When the sub-terminal receives an external line during the communication between the child terminals, the RF switching means sets the main RF unit to the sub-RF after receiving the external line from the sub-terminal. 2. The cordless telephone device according to claim 1, wherein a mute signal is transmitted to the main RF unit and the sub RF unit until the carrier is completely set up on the RF channel. 3. A plurality of slave terminals for performing wireless communication with a master terminal, a case where the plurality of slave terminals perform communication between the slave terminals via the master terminal, and a case where the slave terminal performs external line communication. And a main RF unit that performs wireless communication between the master terminal and the slave terminal, and performs wireless communication between the master terminal and the slave terminal only when performing communication between the slave terminals. Sub R
A wireless communication control method for a cordless telephone device, comprising: a sub-unit terminal that performs wireless communication using the sub-RF unit during communication between the sub-unit terminals; In the state where the sub-RF terminal maintains a sub-RF channel used by the sub-RF unit for wireless communication with the sub-sub terminal during communication between the sub-terminals, the main RF unit Switching the channel used by the sub-RF channel to the sub-RF channel.