JPH05336034A - Wireless telephone - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a wireless telephone device that can automatically notify the user that the public line is available as soon as the public line L is available, even when the public line is in use and the cordless handset cannot make a call. The purpose is to do. [Structure] Since the standby table 12 is provided for storing the identification number of the slave unit for which a call is requested when the public line L is in use, the public line is registered for the slave unit registered in the standby table 12. As soon as L is available, a message indicating this is displayed on the display unit of the corresponding child device to notify it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless telephone device, and more particularly to a cordless telephone device composed of a plurality of slave units and a master unit connected to a public line.

[0002]

2. Description of the Related Art In recent years, wireless cordless telephone devices have been used instead of a cord between a telephone body and a handset.

In the conventional cordless telephone system, the cordless master unit is constructed as shown in FIG. 8 and the cordless slave unit is constructed as shown in FIG. The cordless base unit 1 has the following built-in components. Line I / F units 2a and 2b connected to the public line L to close the line, a transmission unit 3 that modulates control signals and voice signals to the cordless slave units 11a, 11b and 11c and transmits them as high frequency signals, and a cordless cord. A receiver 4 for reproducing control signals and audio signals from high frequency signals sent from the machines 11a, 11b, 11c, a multiplexer 5 for digitizing signals of a plurality of lines and time-division multiplexing them into the same signal, A demultiplexing unit 6 that demultiplexes the demultiplexed signal into a plurality of individual signals, a radio control unit 7 that manages the transmitting unit 3, the receiving unit 4, the multiplexing unit 5, and the demultiplexing unit 6, and demultiplexing. A line switching unit 8 for selecting one set or two sets of the input of the unit 6 and the output of the multiplexing unit 5 to connect to the line I / F units 2a and 2b, and a central control unit 9 for controlling the entire device are provided. It is built in. An antenna 10 is connected to the transmitter 3 and the receiver 4.

The cordless cordless handsets 11a, 11b and 11c each receive a speaker 20, a microphone 21, a key input section (keypad) 22, data from the key input section 22 and control signals sent from the cordless cordless handset 1. The control unit 23 for controlling the control signal, the control signal / voice signal sent from the control unit 23 is modulated to generate a high frequency signal, and the control signal / voice signal is reproduced from the high frequency signal sent from the cordless base unit 1. It is composed of a cordless transmitter / receiver 24, an antenna 25, and a display 26.

The configuration of this cordless telephone device will be described in detail with reference to the flowchart shown in FIG. When making a call from the cordless cordless handset 11a, the cordless cordless handset 11
Power on a and press the call button (step A). Then, the control unit 23 controls the cordless transmitter / receiver unit 24 to send a control signal to the cordless base unit 1, and the cordless base unit 1 receives this signal by the receiving unit 4 (step B), reproduces it, and then demultiplexes it. Send to 6. Next, the wireless control unit 7 of the cordless base unit 1 decodes this control signal and detects that there is a call request from the cordless handset 11a (step C).
Then, this detection signal is sent to the central control unit 9 and at the same time confirmation is performed using the transmitting unit 3 via the downlink slot corresponding to the uplink time slot transmitted by the cordless handset 11a (A
CK) signal to the cordless cordless handset 11a to connect the wireless link to the cordless cordless handset 11a. Here, the central control unit 9 has already controlled the line switching unit 8 to select two sets of the input from the demultiplexing unit 6 and the output to the multiplexing unit 5, and the public line via the line I / F units 2a and 2b. When it is closed to L, all public lines L to which the cordless base unit 1 can be connected are in use. Therefore, the central control unit 9 controls the wireless control unit 7 via the transmission unit 3 to send out a signal (busy signal) indicating that all the public lines L are in use to the cordless cordless handset 11a. A message "line busy" is displayed on the display unit 26 of 11a to notify the user that the call cannot be made (step Y). The user then presses the end button to disconnect the wireless link (step Z).

On the other hand, if there is at least one available public line L to which the cordless base unit 1 can be connected, the central control unit 9 receiving the detection signal controls the line switching unit 8 (step D), The line switching unit 8 selects a slot corresponding to the time slot from the plurality of lines from the demultiplexing unit 6 and connects it to the line I / F unit 2a or 2b corresponding to the free public line L.

After that, when a telephone number is input in the cordless cordless handset 11a using the key input unit 22 as in a normal wired telephone, the control unit 23 causes the multi-frequency signal (DTMF) corresponding to the input telephone number. ) Is sent. This signal is transmitted to the cordless transmitter / receiver 24 and the antenna 25 of the cordless handset 11a.
The cordless master unit 1 side receives this signal via the antenna 10 by the receiving unit 4 and receives the line I /
It is sent to the public line via the F section 2a or 2b (step E), and normal conversation becomes possible (step F). As described above, the cordless cordless handset 11a is called.

Next, the case of receiving an incoming call will be described.
When the cordless handset 11a receives an incoming call, the central control unit 9 of the cordless base unit 1 detects an incoming call from the public line L, and the central control unit 9 notifies the cordless handset 11a of the incoming call. In order to transmit the control signal, the wireless controller 7 is controlled to transmit the control signal via the transmitter 3. In cordless cordless handset 11a,
The control signal from the cordless base unit 1 is received by the cordless transmitter / receiver 24 via the antenna 25 and input to the controller 23. Next, the control unit 23 detects from the control signal that the cordless master unit 1 has an incoming call and is calling the cordless slave unit 11a, sounds the ringing tone of the cordless slave unit 11a, and the user has an incoming call. Let me know. After that, when the user presses the call button of the cordless cordless handset 11a, the cordless transceiver unit 24 is used to transmit a confirmation (ACK) signal to the cordless cordless handset 1. Confirm cordless base unit 1 (ACK)
When the signal is received by the receiver 4 and the confirmation signal is detected by the wireless controller 7, the confirmation signal is sent to the central controller 9.
After that, the central control unit 9 controls the line switching unit 8 to select a slot from which the cordless handset 11a is notified of the incoming call from a plurality of slots with the multiplexing unit 5, and corresponds to the line where the incoming call is made. At the same time as connecting to the line I / F unit 2a or 2b, a wireless link to the cordless base unit 1 and the cordless handset 11a is connected and a call state is entered.

In place of the transmitter 3, receiver 4, multiplexer 5, and demultiplexer 6 having the configuration shown in FIG. 8, a plurality of transmitters 3a, 3b, 3c, as shown in FIG. It is also possible to replace with a plurality of receiving units 4a, 4b, 4c,
When making a call, the cordless cordless handset 11a is turned on and the call button is pressed. Then, the control unit 23 controls the cordless transmission / reception unit 24 to send a control signal to the cordless base unit 1, and the cordless base unit 1 receives and reproduces this signal by the receiving unit 4a. Next, the wireless controller 7 of the cordless base unit 1
Detects the call request from the cordless cordless handset 11a, sends this detection signal to the central control unit 9 and at the same time confirms using the transmitting unit 3a (AC
K) Send a signal to the cordless cordless handset 11a
Connect the wireless link to 11a. Here, if all public lines L to which the cordless base unit 1 can be connected are in use, the central control unit 9 causes the wireless control unit 7 to use all the public lines L for the cordless handset 11a via the transmitting unit 3a. A signal indicating that there is a signal (busy signal) is controlled to be sent, and the user is notified that the call cannot be made. This causes the user to press the end button to disconnect the wireless link. On the other hand, if there is at least one available public line L to which the cordless base unit 1 can be connected, the central control unit 9 which has received the detection signal controls the line switching unit 8 so that the line switching unit 8 transmits an idle signal. A section is selected and connected to the line I / F section 2a or 2b corresponding to an empty line. After this, normal conversation is possible by the above procedure. When receiving an incoming call, the central control unit 9 of the cordless base unit 1 detects an incoming call from the public line L.
Then, the central control unit 9 controls the wireless control unit 7 so as to transmit a control signal via the idle transmission unit, for example, the transmission unit 3a to notify the cordless handset 11a of an incoming call.
In the cordless cordless handset 11 a, the control signal from the cordless cordless handset 1 is received by the cordless transmitter / receiver 24 via the antenna 25 and input to the controller 23. Next, the control unit 23 detects from the control signal that the cordless master unit 1 has an incoming call and is calling the cordless slave unit 11a, sounds the ringing tone of the cordless slave unit 11a, and the user has an incoming call. Let me know. After that, when the user presses the call button of the cordless cordless handset 11a, a confirmation (ACK) signal is transmitted to the cordless cordless handset 1 using the cordless transceiver 24. The cordless base unit 1 receives the confirmation (ACK) signal at the receiving unit 4a corresponding to the transmitting unit 3a that has transmitted the incoming call signal, and when the wireless control unit 7 detects this confirmation signal, the central control unit 9 receives this confirmation signal. Send out. After that, the central control unit 9 changes the line switching unit 8
Line I corresponding to an idle line by controlling the receiver 4a
At the same time as connecting to the / F section 2a or 2b, a wireless link is connected to the cordless base unit 1 and the cordless handset 11a, and a call state is entered.

[0010]

However, the conventional cordless telephone device of the cordless base unit 1 shown in FIG. 8 or FIG. 10 has the following problems.

In response to a call from the cordless cordless handset 11c, if the public line L to which the cordless cordless handset 1 can be connected is in use by the cordless cordless handsets 11a and 11b, the central control unit 9
Controls the line switching unit 8, and the line I / F unit 2a or 2b
A signal (busy signal) indicating that the public line L is in use is sent to the cordless slave unit 11c without closing the line to notify the user. Therefore, the cordless cordless handset 11c cannot make a call. After that, the user had to make a call again at a certain time, and the procedure was very troublesome.

The present invention provides a radiotelephone device capable of automatically notifying the user of the availability of the public line L as soon as the public line L is available, even when the public line L is in use and a call cannot be made from the cordless handset. With the goal.

[0013]

According to a first aspect of the present invention, there is provided a wireless telephone device in which a master unit stores, as a memory, an identification number of a cordless slave unit that has made a call request when all public lines are in use. A standby table is set up, a line information display unit is provided in the slave unit to notify the free state of the public line, and the central control unit of the master unit is in use when all public lines connected to the master unit are in use. It newly detects when it is not possible to make a call from another child device, registers the identification number of the calling child device in the standby table, and sends a line busy signal to the child device to display the child device. The public line busy information is displayed in the section, and as soon as the public line becomes available, the master unit sends a line idle signal to the slave unit to display the public line idle information on the display unit of the slave unit. And

According to the third and fourth aspects of the present invention, the wireless telephone device has a standby table for accumulating the identification numbers of the handset units that have requested the call when all public lines are in use, and guidance reproduction for storing voice messages. The central control unit of the base unit detects the case where a call from another handset cannot be newly made because all public lines connected to the base unit are in use, and the caller When the line number voice message read from the guidance playback unit is sent to the handset unit while registering the machine identification number in the standby table, and a free public line is detected,
It is characterized in that the line unused voice message read from the guidance reproducing unit is transmitted to the slave unit.

[0015]

According to the constitutions of claims 1 and 2, when all the public lines connectable to the master unit are in use, if a call request is newly issued from another slave unit to the master unit, The device registers the identification number of the slave device that has made a call request in the standby table, and as soon as the public line is available, the master device makes a call to the slave device based on the identification number of the slave device in the standby table, After the wireless link with the device is established, a signal indicating the line availability information is transmitted to display the line information on the display unit of the child device and automatically notify the user.

According to the third and fourth aspects of the present invention, since the public line connected to the base unit is all in use, the base unit will not operate if a call from another handset cannot be newly made. The identification number of the cordless handset that requested the call is registered in the standby table, and as soon as the public line is available, the parent device calls the cordless handset based on the identification number of the cordless handset in the standby table, After the wireless link is established, the voice message stored in the guidance reproducing unit is read out to the child device, and the fact that the public line is available is notified by the voice message.

[0017]

Embodiments of the present invention will be described below with reference to FIGS. It is to be noted that components having the same functions as those of the conventional configuration shown in FIGS.

1 to 3 show a first embodiment. FIG. 1 is a block diagram showing a configuration of a cordless master unit according to the present invention, and a block diagram of cordless slave units 11a, 11b, 11c is a diagram.
This is the same as the conventional example shown in FIG.

FIG. 2 is a flowchart showing a calling process of the cordless telephone device of the present invention, and FIG. 3 is a flowchart showing a public line availability notification process of the cordless telephone device of the present invention.

The line I / F section 2a of the cordless base unit 15,
Line I / F unit 2b, transmitting unit 3, receiving unit 4, multiplexing unit 5,
The demultiplexing unit 6, the line switching unit 8 and the antenna 10 are the same as in the conventional example. 12 is a waiting table for storing the identification number of the cordless cordless handset when another cordless cordless handset 15 makes a call request from another cordless cordless handset while all public lines L are in use, and 13 is the entire system A central control unit for controlling the transmitting unit, a transmitting unit 3, a multiplexing unit 5, and a receiving unit 4.
And a demultiplexing unit 6 for managing the wireless control unit.

Control unit of cordless cordless handsets 11a, 11b, 11c
23 is the data from the key input unit 22 and the cordless master unit
It receives control signals from 15 and controls each part.
The display unit 26 displays public line information, which will be described later, and the number of people waiting for the public line L to become available.

The operation of the cordless telephone device configured as described above will be described below. The case of receiving an incoming call using the cordless telephone device of the present invention is exactly the same as the conventional example. A case of making a call using the cordless telephone device of the present invention will be described with reference to the flowchart shown in FIG.

When making a call from the cordless cordless handset 11c, first, the cordless cordless handset 11c is turned on and the call button is pushed (step A). Then, the control unit 23 controls the cordless transmission / reception unit 24 to send a control signal to the cordless base unit 15, and the cordless base unit 15 receives this signal by the reception unit 4 (step B), reproduces it, and then demultiplexes it. Send to 6. The wireless control unit 14 of the cordless base unit 15 decodes this control signal and detects that there is a call request from the cordless handset 11c (step C). At this time, if there is at least one free public line L, a call can be made in the same manner as the conventional example (step D, step E, step F).

On the other hand, if all public lines L to which the cordless base unit 15 can be connected are in use, the number of people waiting for the public line L to be vacant is counted (step G), and the upstream time slot transmitted by the cordless handset 11c. A cordless cordless handset is transmitted to the cordless cordless handset 11c by using the transmitting unit 3 via the downlink slot corresponding to the above, and a busy signal indicating that the public line L is all in use and the number of people waiting for the public line L to be vacant. 11c
Then, the busy signal from the cordless base unit 15 is received by the cordless transmitter / receiver 24 via the antenna 25 and is received by the controller 23.
Is input to. Next, the control unit 23 notifies the user by displaying the busy status of the public line and the number of people waiting for the public line on the display unit 26 of the cordless cordless handset 11c, and then displays the automatic call registration method ( Step H). The user selects whether or not to wait for a free line according to the displayed automatic call registration method (step I), and operates the operation button on the operation unit of the cordless cordless handset 11c.

In the above selection, if the user does not wait for the line to be available, the user presses the end button to disconnect the wireless link between the cordless master unit 15 and the cordless slave unit 11c (step J).

In the above selection, if the line is to be vacant, the control unit 23 controls the cordless transmitter / receiver unit 24 to send a control signal to the cordless base unit 15, and the cordless base unit 15 causes the receiving unit 4 to send this signal. Is received, decoded by the wireless controller 14 and sent to the central controller 13. The central control unit 13 receives this signal and registers the identification number of the cordless cordless handset 11c in the waiting table 12 (step K). Thereafter, the user of the cordless cordless handset 11c pushes the end button to disconnect the wireless link (step L).

After the cordless master unit 15 sends the information of the public line L to the cordless slave unit 11c, the signal reception waiting timer of the cordless master unit 15 is started, so that the automatic call registration signal from the cordless slave unit is started. Alternatively, if the end signal is not received within a certain period of time, the wireless link between the cordless master device 15 and the cordless slave device 11c is disconnected (step J).

A case where the public line L is vacant in this state will be described with reference to the flow chart shown in FIG.
When the central control unit 13 detects that the user who has been using the public line L has ended the call (step M), the line I / F unit 2a or 2b corresponding to the vacant line is controlled to be in the off-hook state (step N). At this time, the public line L
If there is an incoming call from, the call can be made by the same processing as the conventional example (step O). Next, when there is no incoming call from the public line L, the central control unit 13 controls the line switching unit 8 to select one slot from a plurality of slots with the multiplexing unit 5 (step P) and wait for standby. The identification number of the cordless cordless handset 11c registered in the table 12 is read (step Q). After that, the central control unit 13 controls the wireless control unit 14 to transmit the control signal to the cordless cordless handset 11c via the transmission unit 3 (step R). In the cordless cordless handset 11c, the control signal from the cordless cordless handset 15 is received by the cordless transmitter / receiver 24 via the antenna 25 and input to the controller 23. Next, the control unit 23 detects from the control signal that the cordless master unit 15 is calling the cordless slave unit 11c and sounds a ringing tone of the cordless slave unit 11c to notify the user (step S). In this state, by starting the signal reception waiting timer of the cordless base unit 15, if the cordless handset 11c does not respond within a certain period of time, the wireless link and the public line L are cut off as they are (step T). On the other hand, when the user presses the call button of the key input unit 22 of the cordless cordless handset 11c, the cordless cordless handset 11
When c responds, a confirmation (ACK) signal is transmitted to the cordless master device 15 using the cordless transceiver 24. The cordless base unit 15 receives the confirmation (ACK) signal at the receiving unit 4,
When the wireless controller 14 detects this confirmation signal, the central controller 13
This confirmation signal is sent to. After that, the central control unit 13 connects the wireless link with the cordless cordless handset 11c, and controls the wireless control unit 14 so as to transmit a control signal indicating that the line is idle via the transmitting unit 3. In the cordless cordless handset 11c, the control signal from the cordless cordless handset 15 passes through the antenna 25, is received by the cordless transmitter / receiver 24, is input to the controller 23, and recognizes that the public line L has a vacant line. It is displayed on the display unit 26 of the cordless cordless handset (step U). Specifically, the message sentence “There is a free line and it is possible to make a call” is displayed on the display unit 26.

After that, when a telephone number is input in the cordless cordless handset 11c using the key input unit 22 (step V), the control unit 23 responds to the input telephone number in the same manner as an ordinary wired telephone. A frequency signal (DTMF) is transmitted. This signal is sent via the cordless transmitter / receiver 24 and the antenna 25 of the cordless cordless handset 11c, and the cordless cordless handset 15
On the side, this signal is received by the receiving unit 4 via the antenna 10 and sent to the public line L via the line I / F unit 2a or 2b (step W), and a normal conversation becomes possible (step X). ).

As described above, as soon as the public line L becomes available, a message is displayed on the display unit 26 and the user is automatically notified that the public line is free. Therefore, the user can redial the availability of the public line. There is no need to carry out the troublesome work of searching, and it is very easy to use.

FIG. 4 shows a second embodiment. Instead of the transmitter 3, the receiver 5, the multiplexer 5, and the demultiplexer 6 in the first embodiment, a plurality of transmitters 3a, 3b, 3c and a plurality of receivers as shown in FIG. 4a, 4b, 4
It is also possible to replace it with c.

5 to 7 show a third embodiment. In the third embodiment, a voice message can be used to notify the child device that there is a vacancy in the public line L. In the third embodiment, a guidance reproducing unit 16 is provided in addition to the waiting table 12 described above. The guidance playback unit 16
Notify that a plurality of public lines L connected to the cordless base unit 15 are all in use and that a line use voice message used to notify the number of people waiting for a line and that the public line is idle It is configured to store and reproduce the line unused voice message used for. Specifically, as a voice message to use the line, I'm sorry, but the line is blocked. Right now, 3 people are waiting, but if you press "1" I will inform you as soon as the line is available " , As the line unused voice message, a voice message "I'm sorry to have kept you waiting. Please dial because the line is free" is registered in advance.

FIG. 6 is a flow chart showing the calling process of the cordless base unit of the third embodiment, and FIG. 7 is a flow chart showing the line availability notification process of the cordless base unit of the third embodiment. The operation of the cordless telephone device configured as described above will be described below.

Control unit of cordless cordless handsets 11a, 11b, 11c
When the call button of the key input unit 22 is pressed after the power is turned on, 23 transmits a control signal requesting a calling operation to the cordless base unit 15 via the cordless transmitter / receiver unit 24 and the antenna 25 (step A) The receiving unit 4 of the cordless base unit 15 receives the control signal from the antenna 10 and reproduces it at the demultiplexing unit 6 (step B), and the wireless control unit 14 decodes this control signal and decodes the control signal of the cordless handset units 11a, 11b and 11c. The call origination request is detected (step C). At this time, if there is at least one free public line L, a call can be made in the same manner as the conventional example (step D, step E, step F).

On the other hand, if all the public lines L connected to the cordless base unit 15 are in use, the number of waiting non-calls of the handset units is counted from the waiting table 12 (step G).
Then, the radio unit composed of the transmitting unit 3 and the receiving unit 4 is connected to the guidance reproducing unit 16 (step H), all the public lines L are in use via the transmitting unit 3, and waiting for an available line. A line use voice message for notifying the number of people inside is notified (step I). This allows cordless cordless handsets
From the speaker 20 of the cordless handset of 11a, 11b, 11c, for example, "Excuse me, but the line is blocked. Right now, 3 people are waiting, but when you press" 1 "the line is I'll let you know when it's available ".

After transmitting this voice message, the cordless base unit 15 waits for a response from the cordless handset that asks whether or not to register it in the queue of the standby table 12, and the user of the handset uses the key input unit 22 to enter the line. Choose whether to wait for availability,
The selected information is transmitted to the cordless master device 15 (step J).

In the above selection, if the slave does not wait for a free line, the wireless link between the cordless master 15 and the slave is cut off (step K). On the other hand, if the slave unit waits for an available line in the above selection, the central control unit 13 receives this information and registers the identification number of the slave unit in the standby table 12 (step L). After that, the user of the cordless handset uses the key input unit 22
The wireless link is disconnected by pressing the end button of (step M).

When the user who was using the public line L ends the call while the standby table 12 is in the standby state, and the central control unit 13 detects that the public line L is vacant (step N). , Line I / F corresponding to the vacant line
The part 2a or 2b is controlled to be in an off-hook state (step O). At this time, if there is an incoming call from the public line L, the call can be made by the same processing as the conventional example (step P). If there is no incoming call from the public line L, the central control unit 13
Connects the radio unit composed of the transmitting unit 3 and the receiving unit 4 to the guidance reproducing unit 16 (step Q), and further reads the identification number of the slave unit registered in the standby table 12 (step R). After that, the central control unit 13 controls the wireless control unit 14 to transmit the control signal to the slave unit via the transmission unit 3 (step S). In the slave, the control signal from the cordless master 15 is received by the antenna 25 and the cordless transmitter / receiver 24 and input to the controller 23. Next, the control unit 23 detects from the control signal that the cordless master unit 15 is calling the slave unit, sounds a ringing sound of the slave unit, and notifies the user (step T). If the handset does not respond in this state, the wireless link and the public line L are cut off (step U). On the other hand, when the user responds by pressing the call button of the key input unit 22 of the slave unit, the cordless transceiver unit 24 is used to transmit an acknowledgment (ACK) signal to the cordless master unit 15. The cordless base unit 15 receives the confirmation (ACK) signal at the receiving unit 4, and when the wireless control unit 14 detects the confirmation signal, sends the confirmation signal to the central control unit 13. afterwards,
The central control unit 13 connects the wireless link with the slave unit, and the transmitting unit 3
The wireless controller 14 is controlled (step V) to transmit a voice message indicating that a line is available via
The wireless unit composed of the transmitting unit 3 and the receiving unit 4 is connected to the idle line I / F (step W). At this time, from the speaker 20 of the child device, a voice message, for example, "I'm sorry to have kept you waiting. The line is open, please dial" is generated.

After that, when a telephone number is input using the key input unit 22 in the slave unit as in a normal wired telephone, the control unit 23 outputs a multi-frequency signal (DTMF) corresponding to the input telephone number. Send. This signal is sent via the cordless transmitter / receiver 24 of the child device and the antenna 25, and the signal of the cordless parent device 15 is received by the antenna 10 and the receiver 4 and is transmitted via the line I / F unit 2a or 2b. It is sent to the public line (step X), and normal conversation becomes possible (step Y).

As described above, as soon as the public line L becomes available, the user is automatically notified by a voice message that the public line is free. Therefore, the troublesome work of deliberately re-checking the availability of the public line is performed. There is no need, it is very easy to use.

In place of the transmitting unit 3, the receiving unit 5, the multiplexing unit 5 and the demultiplexing unit 6 in the third embodiment, a plurality of transmitting units 3a, 3b, 3c, as in the second embodiment, are used. It is also possible to replace with a plurality of receiving units 4a, 4b, 4c.

In each of the above-described embodiments, the display unit 26 of the slave unit is configured to notify various states by displaying the message text or the voice message from the speaker 20 of the slave unit. It is also possible to configure so as to notify various states by displaying the message text at 26 and using a voice message from the speaker 20 of the slave.

[0043]

According to the first and second aspects of the invention, the master unit is provided with a standby table for storing the identification number of the slave unit for which a call is requested when all public lines are in use. The cordless handset is provided with a line information display section to notify the availability of the public line, and the central control unit of the master unit is newly used from another cordless handset while all the public lines connected to the master unit are in use. It detects when a call cannot be made, registers the identification number of the calling slave in the memory, sends a line busy signal to the slave, and displays public line busy information on the display of the slave. As soon as the public line becomes available, the base unit sends a line idle signal to the slave unit and displays the public line idle information on the display unit of the handset unit. A message to that effect appears on the display of the cordless handset with the identification number registered in the table. Since the notification to display the over-di statement, the user of the slave unit is not necessary to perform the troublesome task of examining and re-bother dial the availability of a public line, the better is very easy to use.

According to the configurations of claims 3 and 4, when all the public lines connectable to the master unit are in use, even when a call request is made to the master unit from another slave unit, the standby table By registering the identification number of the cordless handset to the mobile phone, as soon as the public line becomes available, the base unit notifies the cordless handset of the identification number registered in the standby table to that effect by a voice message read from the guidance playback unit. The user of the machine does not have to perform the troublesome work of redialing and checking the availability of the public line, and the usability is greatly improved.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing a calling process in the first embodiment.

FIG. 3 is a flowchart showing a line availability notification process in the first embodiment.

FIG. 4 is a block diagram of a cordless master device according to a second embodiment.

FIG. 5 is a block diagram of a cordless master device according to a third embodiment.

FIG. 6 is a flowchart showing a call origination process in the second embodiment.

FIG. 7 is a flowchart showing a line availability notification process in the second embodiment.

FIG. 8 is a block diagram of a conventional cordless base unit.

FIG. 9 is a flowchart showing a calling process in the conventional example.

FIG. 10 is a block diagram of another conventional cordless base unit.

FIG. 11 is a block diagram showing a configuration of a cordless cordless handset.

[Explanation of symbols]

 2a, 2b Line interface part 3, 3a, 3b, 3c Transmission part 4, 4a, 4b, 4c Reception part 5 Multiplexing part 6 Demultiplexing part 8 Line switching part 11a, 11b, 11c Cordless handset 12 Standby table 13 Central control Section 14 Wireless control section 15 Cordless master unit 16 Guidance playback section 20 Speaker 26 Display section

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04M 3/42 101

Claims (4)

[Claims] 1. A wireless telephone apparatus comprising a master unit connected to a plurality of public lines and a plurality of slave units wirelessly linked to the master unit, wherein the slave unit includes a microphone and a speaker. A key input unit, a transmission / reception unit that receives a high-frequency signal from the base unit, reproduces a control signal / voice signal, and modulates the control signal / voice signal and transmits the high-frequency signal to the base unit.
It is composed of a control unit that manages key data from the key input unit and controls the transmission / reception unit, and a display unit that displays public line information from the master unit, and the master unit is a high-frequency signal from the slave unit. Receiving unit for reproducing control signals / voice signals, a transmitting unit for modulating the control signals / voice signals and transmitting them as a high-frequency signal to the slave unit, and a plurality of public line signals are digitized into the same signal. A multiplexing unit for time division multiplexing, a demultiplexing unit for separating the time-division multiplexed signal into a plurality of individual signals, a line interface unit connected to a public line for closing the line, and the demultiplexing unit. From the standby table for registering the cordless handset identification number, a line switching unit that selects a plurality of sets of input from the unit and an output to the multiplexing unit and connects with the line interface unit, a central control unit that controls the entire device, The identification number of the calling slave unit is detected when the central control unit detects that a call from another slave unit cannot be newly made while all public lines connected to the master unit are in use. Is registered in the standby table and the line busy signal is sent to the slave unit, the public line busy information is displayed on the display unit of the slave unit, and when the public line is detected to be empty, the master unit notifies the slave unit of the line idle signal. A wireless telephone device configured to transmit the message and display public line idle information on the display unit of the handset. 2. A wireless telephone apparatus comprising a master unit connected to a plurality of public lines and a plurality of slave units linked to the master unit, wherein the slave unit is a microphone, a speaker and a key input. Section, a transmission / reception section that receives a high-frequency signal from the master unit, reproduces a control signal / voice signal, modulates the control signal / voice signal, and transmits the high-frequency signal to the master unit, and a key from the key input unit. It is composed of a control unit that manages data and controls the transmission / reception unit, and a display unit that displays public line information from the master unit, and the master unit receives high-frequency signals from a plurality of slave units and receives control signals. A plurality of receiving units for reproducing voice signals, a plurality of transmitting units for modulating control signals / voice signals and transmitting as high-frequency signals to the plurality of slave units, and a line interface connected to a public line and closing the line And the transmission of the plurality of sets Unit, a receiving unit, a line switching unit for connecting to the line interface unit by selecting an arbitrary set, a central control unit for controlling the entire device, and a standby table for registering a handset identification number. The central control unit detects when it is not possible to make a call from another child device while all the public lines connected to the parent device are in use, and the identification number of the calling child device is displayed in the standby table. When registering and transmitting a line busy signal to the slave unit, displaying public line busy information on the display unit of the slave unit, and detecting that the public line is idle, the master unit sends a line idle signal to the slave unit. A wireless telephone device configured to display public line idle information on the display unit of the handset. 3. A wireless telephone device comprising a master unit connected to a plurality of public lines and a plurality of slave units wirelessly linked to the master unit, wherein the slave unit includes a microphone and a speaker. A key input unit, a transmission / reception unit that receives a wireless signal from the master unit, reproduces a control signal / voice signal, and modulates the control signal / voice signal and transmits the modulated wireless signal to the master unit.
It is composed of a control unit that manages key data from the key input unit and controls the transmission / reception unit, and the master unit receives a wireless signal from the slave unit and reproduces a control signal / voice signal, and A transmission unit that modulates a control signal / voice signal and transmits it as a radio signal to the slave unit; a multiplexing unit that digitizes a plurality of public line signals and time-division-multiplexes them into the same signal; A demultiplexing unit for demultiplexing the received signal into a plurality of individual signals, a line interface unit connected to a public line for closing the line, and a plurality of pairs of inputs of the demultiplexing unit and outputs of the multiplexing unit are selected. A line switching unit connected to the line interface unit, a central control unit that controls the entire apparatus, a standby table that registers a handset identification number, and a guidance reproducing unit that stores a voice message, The central control unit detects when it is not possible to make a call from another child device because all public lines connected to the parent device are in use, and waits for the identification number of the calling child device. Register to the table and send the line use voice message read from the guidance playback unit to the handset,
A wireless telephone device configured to transmit a line-unused voice message read from a guidance reproducing unit to the slave unit when a free public line is detected. 4. A wireless telephone device comprising a master unit connected to a plurality of public lines and a plurality of slave units linked to the master unit, wherein the slave unit is a microphone, a speaker and a key input. Section, a transmission / reception section that receives a high-frequency signal from the master unit, reproduces a control signal / voice signal, modulates the control signal / voice signal, and transmits the high-frequency signal to the master unit, and a key from the key input unit. It is composed of a control unit that manages data and controls the transmission / reception unit, and a display unit that displays public line information from the master unit, and the master unit receives high-frequency signals from a plurality of slave units and receives control signals. A plurality of receiving units for reproducing voice signals, a plurality of transmitting units for modulating control signals / voice signals and transmitting as high-frequency signals to the plurality of slave units, and a line interface connected to a public line and closing the line And the transmission of the plurality of sets Section, receiving section to select an arbitrary set to connect to the line interface section, a central control section for controlling the entire apparatus, a standby table for registering a handset identification number, and a voice message It is composed of a guidance reproducing unit to be stored, and the central control unit detects a case where a call from another slave device cannot be newly made because all public lines connected to the master device are in use, The identification number of the calling slave unit is registered in the standby table, the line use voice message read from the guidance reproducing unit is transmitted to the slave unit, and when a free public line is detected, it is read from the guidance reproducing unit to the slave unit. A wireless telephone device configured to send line-free voice messages.