JP3202064B2 - Wireless telephone equipment - Google Patents

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 comprising a plurality of slave units and a master unit connected to a public line.

[0002]

2. Description of the Related Art In recent years, a cordless telephone device using a radio has been used instead of a cord between a telephone body and a handset.

In a conventional cordless telephone device, a cordless base unit is configured as shown in FIG. 8, and a cordless slave unit is configured as shown in FIG. The following is built in the cordless parent machine 1. A line I / F unit 2a, 2b connected to the public line L for closing the line, a transmission unit 3 for modulating a control signal / audio signal to the cordless slave units 11a, 11b, 11c and transmitting the same as a high frequency signal; A receiver 4 for reproducing control signals and audio signals from high-frequency signals transmitted from the transmitters 11a, 11b and 11c, a multiplexer 5 for digitizing signals of a plurality of lines and time-division-multiplexing them into the same signal, A multiplexing / demultiplexing unit 6 for separating the multiplexed signal into a plurality of individual signals; a radio control unit 7 for managing the transmitting unit 3, the receiving unit 4, the multiplexing unit 5 and the multiplexing / demultiplexing unit 6; A line switching unit 8 for selecting one or two sets of the output of the unit 6 and the input of the multiplexing unit 5 and connecting to the line I / F units 2a and 2b, and a central control unit 9 for controlling the entire apparatus. Built-in. An antenna 10 is connected to the transmitting unit 3 and the receiving unit 4.

The cordless handsets 11a, 11b, and 11c receive a speaker 20, a microphone 21, a key input unit (keypad) 22, data from the key input unit 22, and a control signal sent from the cordless base unit 1, and each unit. , Which controls the control signal / audio signal sent from the control unit 23 to generate a high-frequency signal, and reproduces the control signal / audio signal from the high-frequency signal sent from the cordless base unit 1 , An antenna 25, and a display unit 26.

The configuration of the cordless telephone device will be described in detail with reference to a flowchart shown in FIG. When calling from the cordless handset 11a, the cordless handset 11
Turn on the power of a and press the talk button (step A). Then, the control unit 23 controls the cordless transmitting / receiving 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 the signal, and then reproduces the signal. Send to 6. Next, the wireless control unit 7 of the cordless base unit 1 decodes the control signal and detects that there is a call request from the cordless handset 11a (step C).
Then, this detection signal is transmitted to the central control unit 9 and, at the same time, it is confirmed using the transmission unit 3 via the downlink slot corresponding to the uplink time slot transmitted by the cordless handset 11a (A
CK) signal is transmitted to the cordless handset 11a to establish a wireless link to the cordless handset 11a. Here, the central control unit 9 has already controlled the line switching unit 8 and the output from the demultiplexing unit 6
And the input of the multiplexer 5 selects two pairs, the line I / F unit 2a,
When the public line L is connected to the public line L via 2b, all the public lines L to which the cordless parent machine 1 can be connected are in use. Therefore, the central control unit 9 controls the wireless control unit 7 to transmit a signal (busy signal) indicating that all the public lines L are in use to the cordless handset 11a via the transmission unit 3, and the cordless handset. A message "line busy" is displayed on the display unit 26 of the display 11a to notify the user that the call cannot be made (step Y). The user 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 master unit 1 can be connected, the central control unit 9 having received 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 to the line I / F unit 2a or 2b corresponding to the empty public line L.

[0007] Thereafter, when a telephone number is input using the key input unit 22 in the cordless handset 11a in the same manner as a normal wired telephone, the control unit 23 transmits a multi-frequency signal (DTMF) corresponding to the input telephone number. ). This signal is transmitted to the cordless transceiver 24a and the antenna 25 of the cordless handset 11a.
This signal is received by the receiving unit 4 via the antenna 10 at the cordless base unit 1 side, and received by the line I /
The data is transmitted to the public line via the F section 2a or 2b (step E), and ordinary conversation becomes possible (step F). Thus, the call of the cordless handset 11a is performed.

Next, a case where a call is received 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. For this purpose, the wireless control unit 7 is controlled to transmit a control signal via the transmission unit 3. In the cordless handset 11a,
The control signal from the cordless base unit 1 is received by the cordless transmitting / receiving unit 24 via the antenna 25 and input to the control unit 23. Next, the control unit 23 detects from the control signal that there is an incoming call to the cordless base unit 1 and calls the cordless handset 11a, sounds the ringing sound of the cordless handset 11a, and determines that there is an incoming call to the user. To inform. Thereafter, when the user presses the talk button of the cordless handset 11a, an acknowledgment (ACK) signal is transmitted to the cordless base unit 1 using the cordless transceiver 24. Cordless parent machine 1 confirmed (ACK)
When the signal is received by the receiving unit 4 and the confirmation signal is detected by the wireless control unit 7, the confirmation signal is transmitted to the central control unit 9.
Thereafter, the central control unit 9 controls the line switching unit 8 to select a slot that has notified the cordless handset 11a of the incoming call from a plurality of slots with the multiplexing unit 5, and corresponds to the line that has received the incoming call. At the same time as the connection to the line I / F unit 2a or 2b, the wireless link between the cordless base unit 1 and the cordless slave unit 11a is connected, and a call state is established.

[0009] Instead of the transmitting section 3, receiving section 4, multiplexing section 5, and demultiplexing section 6 having the configuration shown in FIG. 8, a plurality of transmitting sections 3a, 3b, 3c, as shown in FIG. It is also possible to replace with a plurality of receivers 4a, 4b, 4c,
When making a call, the power of the cordless handset 11a is turned on and the talk button is pressed. Then, the control unit 23 controls the cordless transmitting / receiving 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 control unit 7 of the cordless base unit 1
When the control unit decodes the control signal and detects that there is a call request from the cordless handset 11a, it sends this detection signal to the central control unit 9 and at the same time confirms using the transmission unit 3a (AC
K) Send the signal to the cordless slave unit 11a and send it to the cordless slave unit.
Connect the wireless link to 11a. Here, if all the public lines L to which the cordless base unit 1 can be connected are in use, the central control unit 9 sends the wireless control unit 7 via the transmission unit 3a to the cordless slave unit 11a and all the public lines L are in use. It controls to send a signal (busy signal) indicating that there is, and notifies the user that calling is not possible. The user then presses the end button to disconnect the wireless link. On the other hand, if there is at least one vacant public line L to which the cordless base unit 1 can be connected, the central control unit 9 having received the detection signal controls the line switching unit 8 so that the line switching unit 8 Unit is selected and connected to the line I / F unit 2a or 2b corresponding to the idle line. After this, normal conversation becomes 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.
The central control unit 9 controls the wireless control unit 7 to transmit a control signal via the idle transmission unit, for example, the transmission unit 3a in order to notify the cordless handset 11a of the incoming call.
In the cordless handset 11a, the control signal from the cordless base unit 1 is received by the cordless transmitting / receiving unit 24 via the antenna 25 and input to the control unit 23. Next, the control unit 23 detects from the control signal that there is an incoming call to the cordless base unit 1 and calls the cordless handset 11a, sounds the ringing sound of the cordless handset 11a, and determines that there is an incoming call to the user. To inform. Thereafter, when the user presses the talk button of the cordless handset 11a, an acknowledgment (ACK) signal is transmitted to the cordless base unit 1 using the cordless transceiver 24. The cordless base unit 1 receives the acknowledgment (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 the acknowledgment signal, the central control unit 9 sends the acknowledgment signal Send out. Thereafter, the central control unit 9 sets the line switching unit 8
And selects the receiving unit 4a and selects the line I corresponding to the idle line.
/ F unit 2a or 2b and, at the same time, connect a wireless link to cordless base unit 1 and cordless slave unit 11a to enter a call state.

[0010]

However, the conventional cordless telephone 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 handset 11c, if the public line L to which the cordless handset 1 can be connected is being used by the cordless handset 11a and 11b, the central control unit 9
Controls the line switching unit 8, and controls 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 handset 11c without closing the line to notify the user. For this reason, a call cannot be made from the cordless handset 11c. After that, the user had to call again at a certain time, and the procedure was very troublesome.

An object of the present invention is to provide a radio telephone apparatus capable of automatically notifying a user that a public line is available as soon as the public line L is available, even when a call cannot be made from a cordless handset while the public line L is in use. With the goal.

[0013]

According to a first aspect of the present invention, there is provided a wireless telephone device in which a base unit stores an identification number of a cordless handset that has requested a call when all public lines are in use. A standby table is provided for the slave unit, and a line information display unit is provided for the slave unit to notify the vacant state of the public line, and the central control unit of the master unit is used when all the public lines connected to the master unit are in use. Detects when it is impossible to make a call from another handset, registers the identification number of the called handset in the standby table, transmits a line busy signal to the handset, and displays the handset. The public line busy information is displayed on the unit, and as soon as the public line is available, the base unit transmits a line free signal to the child unit and displays the public line idle information on the display unit of the child unit. And

According to a third aspect of the present invention, there is provided a wireless telephone apparatus wherein a standby table for storing identification numbers of handset units requesting a call when all public lines are in use, and a guidance reproduction for storing voice messages. The central control unit of the master unit detects the case where it is impossible to make a call from another slave unit because all the public lines connected to the master unit are in use. When the identification number of the device is registered in the standby table and the line-use voice message read from the guidance playback unit is transmitted to the child device, when a vacant public line is detected,
A line unused voice message read from a guidance reproducing unit is transmitted to the slave unit.

[0015]

According to the first and second aspects of the present invention, when all of the public lines connectable to the master unit are in use and a call request from another slave unit is newly issued to the master unit, The handset registers the identification number of the handset that requested the call in the standby table, and as soon as the public line becomes available, the base unit calls the handset based on the identification number of the handset in the standby table, and After the establishment of the wireless link with the device, a signal indicating the line availability information is transmitted, whereby the line information is displayed on the display unit of the child device and automatically notified to the user.

According to the third and fourth aspects of the present invention, since all the public lines connected to the master unit are in use, if a call cannot be newly made from another slave unit, the master unit will Register the identification number of the handset that has made the call request in the standby table, and then, as soon as the public line becomes available, the base unit calls the handset based on the identification number of the handset in the standby table, and communicates with the handset. After the wireless link is established, the voice message stored in the guidance reproduction unit is read out to the slave unit, and the fact that the public line is free is notified by the voice message.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 8 and 11 showing the conventional configuration will be described with the same reference numerals.

1 to 3 show a first embodiment. FIG. 1 is a block diagram showing a configuration of a cordless base unit according to the present invention, and a block diagram of cordless slave units 11a, 11b and 11c is shown in FIG.
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 idle notification process of the cordless telephone device of the present invention.

The line I / F section 2a,
Line I / F unit 2b, transmitting unit 3, receiving unit 4, multiplexing unit 5,
The demultiplexing unit 6, line switching unit 8, and antenna 10 are the same as in the conventional example. Reference numeral 12 denotes a standby table for storing the identification number of the cordless handset when there is a call request from another cordless handset to the cordless base unit 15 while all the public lines L are in use. The central control unit 14 controls the transmitting unit 3, the multiplexing unit 5, and the receiving unit 4.
And a multiplexing / demultiplexing unit 6.

Control part of cordless handset 11a, 11b, 11c
Reference numeral 23 denotes data from the key input unit 22 and a cordless base unit.
The control section 15 receives the control signal sent from 15 and controls each section.
The display unit 26 displays the public line information described later and the number of people waiting for the public line L free.

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

When calling from the cordless handset 11c, first, the power of the cordless handset 11c is turned on and the call button is pressed (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 the signal, and then reproduces the signal. 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 vacancy of the public line L, a call can be made in the same manner as in the conventional example (step D, step E, step F).

On the other hand, if all the public lines L to which the cordless base unit 15 can be connected are in use, the number of people waiting for the idle state of the public line L is counted (step G), and the up time slot transmitted by the cordless handset 11c is counted. And transmitting a busy signal to the cordless handset 11c indicating that all of the public lines L are in use and the number of people waiting for the public line L to be vacant by using the transmitting unit 3 through the downlink slot corresponding to the cordless handset 11c. 11c
In the control unit 23, the busy signal from the cordless base unit 15 is received by the cordless transmitting / receiving unit 24 via the antenna 25,
Is input to Next, the control unit 23 notifies the user by displaying the busy state of the public line and the number of people waiting for the public line on the display unit 26 of the 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 buttons on the operation unit of the cordless handset 11c.

If the user does not wait for a free line in the above selection, the wireless link between the cordless parent device 15 and the cordless child device 11c is disconnected by pressing the end button (step J).

If it is determined in the above selection that a line is to be idle, the control unit 23 controls the cordless transmission / reception unit 24 to send a control signal to the cordless base unit 15. Is received by the wireless control unit 14 and transmitted to the central control unit 13. The central controller 13 receives this signal and registers the identification number of the cordless handset 11c in the standby table 12 (step K). Thereafter, when the user of the cordless handset 11c presses the end button, the wireless link is disconnected (step L).

Also, after transmitting the information of the public line L from the cordless base unit 15 to the cordless base unit 11c, a signal reception waiting timer of the cordless base unit 15 is started, so that an automatic call registration signal from the cordless base unit is transmitted. Alternatively, when the end signal is not received within a certain period of time, the wireless link between the cordless parent device 15 and the cordless child 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 flowchart 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 central control unit 13 controls the line I / F unit 2a or 2b corresponding to the vacant line and sets the line to the off-hook state (step M). N). At this time, the public line L
If there is an incoming call, a call can be made by the same processing as in the conventional example (step O). Next, if there is no incoming call from the public line L, the central control unit 13 controls the line switching unit 8, selects one slot from the plurality of slots with the multiplexing unit 5 (step P), and waits. The identification number of the cordless handset 11c registered in the table 12 is read (step Q). Thereafter, the central control unit 13 controls the wireless control unit 14 to transmit a control signal to the cordless handset 11c via the transmission unit 3 (step R). In the cordless handset 11c, the control signal from the cordless base unit 15 is received by the cordless transmitting / receiving unit 24 via the antenna 25 and input to the control unit 23. Next, the control unit 23 detects that the cordless parent device 15 is calling the cordless child device 11c based on the control signal, sounds a ringing tone of the cordless child device 11c, and notifies the user (step S). By starting the signal reception waiting timer of the cordless base unit 15 in this state, 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 (step T). On the other hand, when the user presses the talk button of the key input unit 22 of the cordless handset 11c, the cordless handset 11
When c responds, an acknowledgment (ACK) signal is transmitted to the cordless base unit 15 using the cordless transmitting / receiving unit 24. The cordless base unit 15 receives an acknowledgment (ACK) signal at the receiving unit 4,
When the radio control unit 14 detects this confirmation signal, the central control unit 13
This confirmation signal is sent to Thereafter, the central control unit 13 connects the wireless link with the cordless handset 11c, and controls the wireless control unit 14 to transmit a control signal indicating that a line is free via the transmitting unit 3. In the cordless handset 11c, the control signal from the cordless base unit 15 is received by the cordless transmission / reception unit 24 via the antenna 25 and input to the control unit 23, and when it recognizes that the public line L has become free, the line is released. It is displayed on the display unit 26 of the cordless handset (step U). Specifically, a message saying “there is an available line and a call is possible” is displayed on the display unit 26.

Thereafter, when a telephone number is input using the key input unit 22 in the cordless handset 11c (step V), as in a normal wired telephone, the control unit 23 makes a call corresponding to the input telephone number. Transmit a frequency signal (DTMF). This signal is sent via the cordless transmitting / receiving unit 24 and the antenna 25 of the cordless handset 11c,
On the side, this signal is received by the receiving unit 4 via the antenna 10 and transmitted to the public line L via the line I / F unit 2a or 2b (step W), so that ordinary 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 has become available, so that the availability of the public line is dialed again. There is no need to perform the cumbersome task of checking, and the usability is greatly improved.

FIG. 4 shows a second embodiment. Instead of the transmitting unit 3, the receiving unit 5, the multiplexing unit 5, and the demultiplexing unit 6 in the first embodiment, as shown in FIG. 4, a plurality of transmitting units 3a, 3b, 3c, and a plurality of receiving units 4a, 4b, 4
It is also possible to substitute c.

FIGS. 5 to 7 show a third embodiment. In the third embodiment, the child device can be notified by voice message that the public line L is free. In the third embodiment, a guidance reproducing unit 16 is provided in addition to the standby table 12. The guidance playback unit 16
A line use voice message used for notifying that a plurality of public lines L connected to the cordless base unit 15 are all in use and the number of people waiting for a line to be idle, and that the public line is idle. It is configured to accumulate and reproduce a line-unused voice message used for this purpose. To be specific, a voice message saying "I'm sorry, but the line is occupied. Now three people are waiting, but if you press" 1 ", you will be notified as soon as the line is available." As a voice message not in use on the line, a voice message saying, "We have been waiting, please dial because the line is free" is registered in advance.

FIG. 6 is a flowchart showing the transmission processing of the cordless base unit of the third embodiment, and FIG. 7 is a flowchart showing the line free notification processing 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 handset 11a, 11b, 11c
23, after the power is turned on, when the call button of the key input unit 22 is pressed, a control signal for requesting a call operation to the cordless base unit 15 is transmitted to the cordless base unit 15 through the cordless transmitting / receiving unit 24 and the antenna 25 (step A) Yes. The receiving unit 4 of the cordless base unit 15 receives the control signal from the antenna 10 and reproduces it by the demultiplexing unit 6 (step B), and the wireless control unit 14 decodes the control signal and outputs the control signal to the cordless handset 11a, 11b, 11c. It is detected from which call request (step C). At this time, if there is at least one vacancy of the public line L, a call can be made in the same manner as in 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 unsent calls of the slave units is counted from the standby table 12 (step G).
Then, the wireless unit composed of the transmitting unit 3 and the receiving unit 4 is connected to the guidance reproducing unit 16 (step H), and all the public lines L are in use via the transmitting unit 3, and A line-use voice message for notifying the number of persons is notified (step I). This allows cordless handset
From the speaker 20 of the handset that made the call out of 11a, 11b, and 11c, for example, "I'm sorry, but the line is busy. Right now, three people are waiting. I'll let you know as soon as it is available. "

After transmitting the voice message, the cordless base unit 15 waits for a response from the cordless handset to register in the queue of the standby table 12, and the user of the handset uses the key input unit 22 to connect to the line. Choose whether to wait for availability,
The selected information is transmitted to the cordless base unit 15 (step J).

If it is determined in the above selection that the slave unit does not wait for a free line, the wireless link between the cordless master unit 15 and the slave unit is cut off (step K). On the other hand, if it is determined in the above selection that the slave unit waits for a free line, 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 slave unit
When the end button is pressed, the wireless link is disconnected (step M).

When the user who has been using the public line L terminates the call and the central control unit 13 detects that the public line L is free (step N) while the standby table 12 has a standby state. , Line I / F corresponding to vacant line
The section 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, a call can be made by the same processing as in the conventional example (step P). If there is no incoming call from the public line L, the central control unit 13
Connects the wireless unit composed of the transmitting unit 3 and the receiving unit 4 to the guidance reproducing unit 16 (step Q), and reads the identification number of the slave unit registered in the standby table 12 (step R). Thereafter, the central control unit 13 controls the wireless control unit 14 to transmit a control signal to the slave through the transmission unit 3 (step S). In the slave unit, the control signal from the cordless base unit 15 is received by the antenna 25 and the cordless transmitting / receiving unit 24 and input to the control unit 23. Next, the control unit 23 detects from the control signal that the cordless base unit 15 is calling the slave unit, sounds a ringing tone of the slave unit, and notifies the user (step T). If the slave 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 presses the talk button of the key input unit 22 of the slave unit and the slave unit answers, the cordless transmitting / receiving unit 24 transmits an acknowledgment (ACK) signal to the cordless base unit 15. The cordless base unit 15 receives the acknowledgment (ACK) signal at the receiving unit 4, and sends the acknowledgment signal to the central control unit 13 when the wireless control unit 14 detects the acknowledgment signal. afterwards,
The central control unit 13 connects the wireless link with the slave unit,
Control the wireless control unit 14 to transmit a voice message indicating that the line is free via (step V),
The wireless unit constituted by the transmitting unit 3 and the receiving unit 4 is connected to the idle line I / F (step W). At this time, a voice message, for example, "Please wait, please dial now because the line is free" is generated from the speaker 20 of the slave unit.

Thereafter, as in the case of a normal wired telephone, when a telephone number is input using the key input unit 22 in the slave unit, the control unit 23 outputs a multi-frequency signal (DTMF) corresponding to the input telephone number. Send. This signal is sent via the cordless transmission / reception unit 24 and the antenna 25 of the slave unit, and the cordless base unit 15 receives this signal via the antenna 10 and the reception unit 4 and via the line I / F unit 2a or 2b. The message is sent to the public line (step X), and ordinary conversation is enabled (step Y).

As described above, as soon as the public line L becomes available, the user is automatically notified by voice message that the public line is available. There is no need for it, and it is very easy to use.

It should be noted that, instead of the transmitting section 3, the receiving section 5, the multiplexing section 5, and the demultiplexing section 6 in the third embodiment, a plurality of transmitting sections 3a, 3b, 3c, And a plurality of receiving units 4a, 4b, 4c.

In each of the above embodiments, various states are notified by the display of a message on the display unit 26 of the slave unit or the voice message from the speaker 20 of the slave unit. It is also possible to configure to notify various states by using the message sentence at 26 and using the voice message from the speaker 20 of the slave unit.

[0043]

According to the first and second aspects of the present invention, the master unit is provided with a standby table for storing the identification numbers of the slave units that have requested a call when all the public lines are in use, The slave unit is provided with a line information display unit to notify the vacant state of the public line, and the central control unit of the master unit is newly connected from another slave unit while all the public lines connected to the master unit are in use. Detects the case where calling is not possible, registers the identification number of the calling handset in the memory, transmits a line busy signal to the handset, and displays the public line busy information on the display unit of the handset, When detecting the vacancy of the public line, the line switching unit is controlled to select one slot from the plurality of slots with the multiplexing unit, and the identification number of the slave unit registered in the standby table is read and recognized. The child device whose number was read
Since the idle line signal is transmitted via the transmission unit to display the public line idle information on the display unit of the slave unit, as soon as the public line is available, the cordless master unit recognizes the child of the identification number registered in the standby table. Since a message to that effect is displayed on the display unit of the handset to notify the user, there is no need for the user of the handset to perform the troublesome work of dialing and checking the availability of the public line, which is very convenient. .

According to the third and fourth aspects of the present invention, when all of the public lines connectable to the master unit are in use, even if there is a call request from another slave unit to the master unit, a standby table is provided. By registering the identification number of the slave unit, when detecting a vacancy of the public line, the line switching unit is controlled, one slot is selected from a plurality of slots with the multiplexing unit, and registered in the standby table. Read the identification number of the slave unit that has been
Since the line unused voice message read from the guidance playback unit is transmitted via the transmission unit, the user of the slave unit does not need to perform the troublesome work of dialing and checking the availability of the public line again, which is very convenient. Will be better.

[Brief description of the drawings]

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

FIG. 2 is a flowchart illustrating a transmission process according to the first embodiment.

FIG. 3 is a flowchart illustrating a line availability notification process according to the first embodiment;

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

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

FIG. 6 is a flowchart illustrating a transmission process according to the second embodiment.

FIG. 7 is a flowchart illustrating a line availability notification process according to the second embodiment.

FIG. 8 is a block diagram of a conventional cordless parent device.

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

FIG. 10 is a block diagram of another conventional cordless parent device.

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

[Explanation of symbols]

 2a, 2b Line interface unit 3, 3a, 3b, 3c Transmitting unit 4, 4a, 4b, 4c Receiving unit 5 Multiplexing unit 6 Demultiplexing unit 8 Line switching unit 11a, 11b, 11c Cordless handset 12 Standby table 13 Central control Unit 14 Wireless control unit 15 Cordless base unit 16 Guidance playback unit 20 Speaker 26 Display unit

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ identification code FI H04B 7/26 109K (56) References JP-A-2-217030 (JP, A) JP-A-54-60806 (JP, A) JP-A-62-277825 (JP, A) JP-A-2-60342 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04B ⁷ /24-7/26 H04Q 7/00 -7/38 H04M 1/725 H04M 3/42-3/58

Claims (4)

(57) [Claims] 1. 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, a speaker, A key input unit, a transmission / reception unit that receives a high-frequency signal from the parent device, reproduces a control signal / audio signal, modulates a control signal / audio signal, and transmits the high-frequency signal to the parent device,
A control unit that manages key data from the key input unit and controls the transmission and reception unit, and a display unit that displays public line information from the master unit, wherein the master unit is a high-frequency signal from the slave unit And a transmitting unit for receiving and reproducing a control signal / audio signal, a transmitting unit for modulating the control signal / audio signal and transmitting it to the slave unit as a high frequency signal, and digitizing a plurality of public line signals into the same signal. A multiplexing unit for time-division multiplexing, a multiplexing / 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, A line switching unit that selects a plurality of sets of inputs from the unit and outputs to the multiplexing unit and connects to the line interface unit, a central control unit that controls the entire device, and a standby table that registers a slave unit identification number. The central control unit detects the case where it is impossible to make a call from another slave unit while all the public lines connected to the master unit are in use, and identifies the identification number of the calling slave unit. And registering the line in the standby table, transmitting a line busy signal to the slave unit, displaying the public line busy information on the display unit of the slave unit, and detecting the vacancy of the public line, controlling the line switching unit and controlling the multiplexing unit. One slot is selected from the plurality of slots, and the identification number of the slave unit registered in the standby table is read, and the identification number is read.
A wireless telephone device configured to transmit a line idle signal to the slave unit via the transmission unit and display public line idle information on a display unit of the slave unit. 2. A wireless telephone device comprising a master unit connected to a plurality of public lines and a plurality of slave units linked between the master unit, wherein the slave unit includes a microphone, a speaker, and key input. Unit, a transmission / reception unit that receives a high-frequency signal from the parent device, reproduces a control signal / audio signal, modulates a control signal / audio signal, and transmits it to the parent device as a high-frequency signal, and a key from the key input unit. It comprises 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. The master unit receives high-frequency signals from a plurality of slave units, A plurality of receiving units for reproducing an audio signal, a plurality of transmitting units for modulating a control signal / audio signal and transmitting the same as a high-frequency signal to the plurality of slave units, and a line interface connected to a public line for closing the line Unit and transmission of the plurality of sets Unit, a line switching unit that selects an arbitrary set from the receiving unit and connects to the line interface unit, a central control unit that controls the entire device, and a standby table that registers a slave unit identification number, The central control unit detects when it is impossible to make a call from another handset while all the public lines connected to the base unit are in use, and stores the identification number of the called handset in the standby table. Registering and transmitting a line busy signal to the slave unit, displaying the public line busy information on the display unit of the slave unit, and controlling the line switching unit when detecting a vacancy of the public line to control a plurality of slots with the multiplexing unit. Select one of the slots, read the identification number of the slave unit registered in the standby table, and enter the identification number.
A wireless telephone device configured to transmit a line vacancy signal to the slave unit from which the data has been read, via the transmission unit, and to display public line idle information on a display unit of the slave unit. 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, a speaker, A key input unit, a transmission / reception unit that receives a wireless signal from the master unit, reproduces a control signal / audio signal, and modulates a control signal / audio signal and transmits the modulated signal as a wireless signal to the master unit;
A control unit that manages key data from the key input unit and controls the transmission / reception unit, the master unit receives a wireless signal from the slave unit and reproduces a control signal / audio signal, A transmitting unit that modulates a control signal / voice signal and transmits it to the slave unit as a wireless signal, a multiplexing unit that digitizes signals of a plurality of public lines and time-division-multiplexes them into the same signal, Multiplexing / demultiplexing unit that separates the divided signals into a plurality of individual signals, a line interface unit that is connected to a public line to close the line, and selects a plurality of sets of inputs of the multiplexing / demultiplexing unit and outputs of the multiplexing unit. A line switching unit connected to the line interface unit, a central control unit for controlling the entire apparatus, a standby table for registering a slave unit identification number, and a guidance reproducing unit for storing a voice message, The central control unit detects when it is impossible to make a call from another slave unit because all the public lines connected to the master unit are in use and waits for the identification number of the called slave unit. Register in the table and send the line use voice message read from the guidance playback unit to the slave unit,
When detecting the vacancy of the public line, the line switching unit is controlled to select one slot from the plurality of slots with the multiplexing unit, and the identification number of the slave unit registered in the standby table is read and recognized. The slave whose number was read
A wireless telephone device configured to transmit a line unused voice message read from the guidance reproducing unit via the transmitting unit . 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 includes a microphone, a speaker, and a key input. Unit, a transmission / reception unit that receives a high-frequency signal from the parent device, reproduces a control signal / audio signal, modulates a control signal / audio signal, and transmits it to the parent device as a high-frequency signal, and a key from the key input unit. It comprises 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. The master unit receives high-frequency signals from a plurality of slave units, A plurality of receiving units for reproducing an audio signal, a plurality of transmitting units for modulating a control signal / audio signal and transmitting the same as a high-frequency signal to the plurality of slave units, and a line interface connected to a public line for closing the line Unit and transmission of the plurality of sets Unit, a line switching unit for selecting an arbitrary set from among the receiving units and connecting to the line interface unit, a central control unit for controlling the entire apparatus, a standby table for registering a slave unit identification number, and a voice message. The central control unit is configured to detect when it is impossible to make a call from another slave unit because all the public lines connected to the master unit are in use. Registering the identification number of the called handset in the standby table, transmitting the line use voice message read from the guidance playback unit to the handset, and detecting a vacancy of the public line, if there is no incoming from the public line, the line switching is performed. part selects one slot out of the plurality of slots of the control to the multiplexer to read the identification number of the handset that is registered in the waiting table, the identification number is read It was in the child machine
A wireless telephone device configured to transmit the line unused voice message read from the guidance reproduction unit via the transmission unit .