JPH07303140A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To provide the cordless telephone system capable of informing a slave set side about an end of speech in a natural form when speech end processing is made by a master station side in the case of talking between the master station and the slave station. CONSTITUTION:A handset 1 is connected to an external line (L1, L2) or a voice compression section 10a and a voice expansion section 10b via a speech processor 2 to attain external line speech or extension speech. Then the master station side is provided with a tone generating section 33 and a one generating section outputs a pseudo busy tone in a prescribed timing based on a control signal from a CPU 6 and it is transmitted from an antenna 13 via a voice compression section, a band limit filter 11 and a transmission section 12 to a corresponding slave station. When extension speech end processing is made such as depression of an extension button at the master station in the case of extension speed in a timing, the tone generating section is operated attended therewith and a tone is kept being outputted till an extension speech end signal comes from the slave station.

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, and more specifically, it has a slave station connected by radio, and can communicate between the master station and the slave station via the radio. The present invention relates to an improvement in the telephone device at the end of the call.

[0002]

2. Description of the Related Art There is a cordless telephone device that can make a call from a portable child station to an outside line through a parent station or as an intercom (extension) between a parent and child. When making such an extension call, by pressing a predetermined operation button (switch) such as an extension button generally provided on the originating station (master / slave) side, the other station is called and communication between the parent and child is performed. If is connected, a predetermined call is made, and after the call ends, a predetermined process is performed to release the communication line. Then, the predetermined process is generally performed by on-hooking on the master station side, but in the case of a slave station, it is performed by pressing a predetermined operation button or the like.

On the other hand, as a usage mode of the extension call,
It may be used simply to make contact between parents and children.
Also, in order to transfer from one station that received an incoming call from the outside line to the other station, once the connection with the outside line was put on hold, the other station was called, and the outside line was placed using the above extension call. There is a case to inform.

As a cordless telephone device having such a structure, there is a cordless telephone device disclosed in, for example, Japanese Patent Publication No. 4-8983. The invention disclosed in this publication improves the function at the time of ending the extension call in the cordless telephone device having the extension call function, and when the operation for ending the extension call is performed on the master station side, The slave station is intentionally returned to the reception standby state.

[0005]

However, in the cordless telephone device disclosed in the above-mentioned conventional publication, when the extension call termination processing is performed on the master station side, the slave station side is put into a standby state, that is, a silent state. Become. Even in a general cordless telephone device (which does not have the function of automatically returning to the standby state disclosed in the prior art publication) capable of extension communication, the same phenomenon (becomes a silent state) occurs although the standby state does not occur.

[0006] Then, the person using the slave station disconnects the call regardless of his / her intention. Therefore, if the person on the slave station side has no intention of ending the extension call, the speaker suddenly becomes silent. In that case, the user may be aware that the battery of the slave station has run out or other trouble has occurred, which is anxious. On the contrary, there is a possibility that the parent station may misunderstand that the extension call is simply terminated even though the call is disabled due to a failure or the like.

The present invention has been made in view of the above background, and an object of the present invention is to solve the above problems and to make a call when a call is made between a master station and a slave station. When the call end process is performed in, the mobile station side can be notified of the call end in a natural manner, and then a predetermined process can be performed as necessary, and a new device / part is provided to perform the process. It is to provide a cordless telephone device that can be operated without any need.

[0008]

In order to achieve the above object, in the cordless telephone device according to the present invention, it is possible to wirelessly connect to a master station which is connected to a telephone line and has a transceiver, and the master station. A cordless telephone device that is connected to an outside line via the master station and is capable of performing an extension call with the master station, the extension call ending to the master station. A message generating means is provided to detect that a predetermined extension call termination process has been performed on the master station side during an extension call, and activates the extension termination message generating means to extend the extension to the slave station via the radio. The control means outputs a call end message.

As another solution, a master station connected to a telephone line and provided with a transceiver, and a slave station wirelessly connectable to the master station, the slave station being the master station In a cordless telephone device which is connected to an external line through the telephone and is capable of making an extension call with the master station, a tone control signal for digital control is output from a CPU incorporated in the master station to the slave station. An MSK signal generating unit for converting to the above is provided, and the output of the MSK signal generating unit is superposed on the transmission system of the extension call so that it can be transmitted to the slave station, and at the time of the extension call, the predetermined extension call end at the master station side. A control means for detecting that the processing has been performed and intermittently giving the same code to the MSK signal generating section is provided, and an intermittent sound of a single frequency is output to the slave station via the radio. May be.

Further, preferably, on the premise of the above various cordless telephone devices, after the extension call termination message is output, the extension termination message generating means is operated until the extension call completion signal is received from the slave station side. It is to be. Further, it is more preferable that the control means further has a function of stopping the output when a certain period of time elapses after the output of the extension call end message is started. Furthermore, it is more preferable that the extension call end message is a pseudo-generated busy tone.

[0011]

When the master station and the slave station are wirelessly connected to each other and are in an extension call state, if the master station has a process for ending the extension call, the control means detects it and the extension By operating the end message generating means or the MSK signal generating section, the pseudo busy tone and other predetermined messages (when the MSK signal generating section is used, the same code (1 or 0) is intermittently output. Output signal). This message is transmitted to the slave station via radio. As a result, even if the user of the slave station suddenly hangs up the extension call regardless of his / her intention, if it is based on the instruction from the master station side, he / she can hear the pseudo busy tone as described above, which causes a malfunction. Not
By the instruction from the master station side, it will be known that the extension call has ended.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a cordless telephone device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a block diagram of the parent station (parent device) side of the cordless telephone device of this embodiment, and FIG. 2 is a block diagram of the child station (child device) side. As shown in the figure, in this example, the transmitter 1a and the receiver 1b are the speech processor 2
It is possible to connect to the outside lines (L1, L2) via.
When making a call, the button input unit 5 detects that the button unit 4 formed on the surface of the main unit body is pressed, and sends the detected number to the CPU 6. Then, based on the control signal from the CPU 6, the dial pulse corresponding to the button (destination dial number) pressed by the dial pulse generator 7 is output to the outside line side.

On the other hand, when a call is made from the slave station to the outside line, the speech processor 2 is switched to the outside line L1,
L2 is connected to the voice compression unit 10a and the voice decompression unit 10b,
The signal sent from the outside line side is compressed by the voice compression unit 10a, passed through the band limiting filter 11 to remove the unnecessary frequency band, and transmitted from the antenna 13 to the slave station using the transmission unit 12. To do. On the contrary, the signal sent from the child station is received by the receiving unit 14 via the antenna 13, and is expanded to the audible area by the voice expanding unit 10b.
It is designed to be sent to an outside line via.

In addition, in the extension call between the parent station and the child station, the speech processor 2 is switched to connect the handset 1 to the voice compression unit 10a and the voice decompression unit 10b, which is similar to the connection between the child station and the outside line. It is done according to the principle. The switching of the connection line in the speech processor 2 is performed by the control signal from the CPU 6.

Further, as shown in FIG. 2, on the slave station side, the output of the transmitter 20a is sent to the transmitting unit 23 via the voice compressing unit 21a and the band limiting filter 22, and the parent unit via the antenna 24. It is designed to be sent to the station. Then, the signal received by the receiving unit 25 via the antenna 24 is expanded into the audible region by the voice expanding unit 21b and output from the handset 20b.

Further, when transmitting from the slave station side, the button input section 28 detects the depression of the button section 27 formed on the surface of the slave unit main body (not shown), and the dial number pushed is detected by the CPU 29 of the slave station. , CPU on the master station side via the transmitter 23
6 to operate the dial pulse generator 7.

Furthermore, both the master station and the slave station have operation switches 30 and 31 such as extension buttons and hold buttons, and the outputs of the operation switches 30 and 31 are output to the button input section 5, respectively.
Connected to 28. As a result, when the hold button is pressed, it is detected by the button input units 5 and 28, and is sent to the CPU 6 of the master station directly or through the communication line (a predetermined signal is sent from the CPU 29 to the master station). , Put the called outside line on hold.

When the extension button is pressed once (when no extension call is being made), the extension button is pressed.
It is detected by 28 and sent to the respective CPUs 6, 29.
Then, each of the CPUs 6 and 29 outputs an extension call signal to the other party using the transmission units 12 and 23. When the extension button is pressed on the master station side, the CPU 6
Sends the call signal and the speech processor 2
To activate the handset 1 to activate the voice compression / decompression units 10a, 1
Connect to 0b to secure a communication line between parent and child. When the extension button is pressed on the slave station side, the receiving unit 1 of the master station
When the CPU 6 receives the extension calling signal via 4, the switching processing of the speech processor 2 is performed as described above.

When the extension button is pressed again in the extension telephone call state, the CPUs 6 and 29 determine that the extension telephone call has ended, and predetermined termination processing (release of the communication line, return to the standby state, switching of the speech processor 2, etc.). do. Further, in the case of the master station, even when the handset 1 is placed at a predetermined position on the master unit and is hooked on, it is detected and the extension call is released. The configurations of the respective units described above are the same as the conventional ones, and thus detailed description thereof will be omitted.

Here, in the present invention, the master unit side is provided with a tone generating section 33 as a call end message outputting means for generating a pseudo busy tone, and the pseudo busy tone is output from the tone generating section 33 at a predetermined timing. It can be transmitted from the antenna 13 via the voice compression unit 10a, the band limiting filter 11, and the transmission unit 12, and can be transmitted to the corresponding slave station. This pseudo busy tone is actually a square wave output from the output port of the CPU 6, and based on that, a tone that turns on and off at a predetermined frequency is created. Then, the operation of the tone generating section 33 is operated based on a signal from the CPU 6 as a control means. Then, the CPU 6 of this control means portion
The function of is as shown in FIG. 3, for example.

That is, first, it is assumed that an extension call state is established based on an extension call from the master station or the slave station side (ST1). This state is detected by the CPU 6. In this state, it is judged whether or not there is an extension call termination processing command (pressing the extension button of the master station, on-hook of the master station) from the master station side (ST2), and if there is such a command, a tone is generated. The unit 33 is operated to output the pseudo busy tone so as to be superimposed on the communication path from the master station to the slave station, and is transmitted to the slave station side (ST3).

As a result, even if the user of the slave station suddenly disconnects the extension call regardless of his / her intention, if the extension call is based on the instruction from the master station side, the pseudo busy tone is generated as described above in the handset 2.
Since it is output from 0b, it will not be erroneously recognized as a failure. When the user of the slave station receives the pseudo busy tone, the user presses the extension button, and the CPU 29 sends an end signal to the master station based on the push button. When the master station (CPU 6) receives the signal associated with the depression of the extension button on the slave station side, it stops the operation of the tone generating section 33 and stops the transmission of the pseudo busy tone (ST4, 5). The function between the steps 2 and 5 is as a control means. Thus, by stopping the transmission of the pseudo busy tone after waiting for the response from the slave station side, the slave station user can surely confirm that the extension call end processing has been performed on the master station side. it can.

Then, in the present example, after that, the master station is put in a standby state, or when the extension call is being performed for transfer of an outside call and the parent station goes out to the outside line, the standby state is set. Instead, the hold state is released (performed based on the control signal from the CPU 6), and the speech processor 2 is operated to perform a predetermined process such as connecting the master station and an outside line.
On the slave station side, the CPU 29 outputs a signal corresponding to the pressing of the extension button to the master station and then returns to the standby state.

In the above-described embodiment, the pseudo-busy tone similar to the busy tone sent from the central office side at the end of the normal outside line call is used as the extension call end message output from the tone generator 33. The invention is not limited to this, and may be various other messages.

4 and 5 show a second embodiment of the present invention. In this embodiment as well, since the basic structure of the first embodiment described above can be used, the same parts are designated by the same reference numerals and the description thereof is omitted. Then, in this embodiment, when performing the various processes shown in the first embodiment, predetermined information is transmitted and received between the CPU 6'on the master side and the CPU 29 on the slave side. This information is transmitted and received by converting the digital signal representing each function into two frequency tones (MSK).
System), and superimposes it on the analog audio signal output from the audio compression units 10a and 21a and sends it to the other party.

Specifically, on the master side and the slave side respectively,
Audio compression units 10a, 21a and band limiting filters 11, 2.
The output signals from the MSK signal generators 40 and 41 are added to the line connecting the two. In addition, the MSK signal detectors 42 and 43 that receive the MSK signals sent from the MSK signal generators 40 and 41 are respectively included in the receiver 1
The signal lines going from 4, 25 to the voice expanding units 10b, 21b are branched and connected.

Then, the MSK signal generators 40, 41
Receives two control signals (digital signals of a combination of "1/0" of a predetermined number of bits) output from the CPUs 6 ', 29, and outputs two control signals corresponding to "1" and "0" respectively. It is designed to convert tones of different frequencies (see FIG. 6). In the case of 1200 BPS, "1" is "1200 Hz" and "0" is "1800 Hz".
In the case of 2400 BPS, "1" becomes "120"
At "0 Hz", "0" becomes "2400 Hz".

When the MSK signal detectors 42 and 43 detect the reception of the MSK signal converted into the tone signal, the MSK signal detectors 42 and 43 perform the reverse conversion to detect the tone frequency, and the value "0/1" is detected. Of the CPU 6 ',
Give to 29. Then, the CPU 6 ', 29 discriminates the control command from the given digital signal and performs a predetermined process. By doing so, it is possible to send and receive the control signal using the same transmission path as that of general voice for a call.

Since the MSK signal is a sound that is offensive to humans, when the MSK signal detecting sections 42 and 43 receive the MSK signal, the sound expanding sections 10b and 21b are muted so that the user cannot hear. I have to. The function of generating and detecting the MSK signal and the function of muting are also implemented in the telephone of the first embodiment, but are omitted in FIG. Since the specific configuration of each of the above-mentioned units is the same as the conventional one, detailed description thereof will be omitted.

In the present invention, the CP built in the master station
U6 'is provided with a function of intermittently giving the same code to the MSK signal generation unit 40 when a predetermined extension call termination process is performed on the master station side. That is, as shown in FIG. 7, for example, the CPU 6 ′ repeatedly outputs and stops the same code “1” at fixed time intervals. Then MS
The K signal generating section 40 outputs the tone signal having the frequency corresponding to the code only when the digital signal "1" is input, and outputs the tone signal when the signal from the CPU 6'is not sent. Not (silence). Therefore, in the output of the MSK signal generator 40, tone signals of the same frequency are intermittent (in this example, the on time is the same as the off time).
It will be turned on and off. As a result, a pseudo busy tone similar to the busy tone is generated and output.
Then, the tone signal (pseudo busy tone) that is turned on and off intermittently is transmitted to the slave station via the band limiting filter 11, the transmission unit 12, and the antenna 13. The intermittent sound does not necessarily have to have the same on time and off time.

On the other hand, on the slave station side, the pseudo busy tone is received from the antenna 24 via the receiving section 25. The received pseudo busy tone, which was originally generated by the MSK signal generator 40 on the master station side, is a tone signal that is intermittent in a short time, and its form is completely different from that of a normal control signal. Therefore, the MSK signal detector 43 cannot recognize the MSK signal and sends it to the voice decompressor 21b as it is. Therefore, the user of the child station can hear the pseudo busy tone through the handset 20b. In addition, a regular MS
The K signal may inform the slave station side that an intermittent tone is to be sent, and the mute function may not be activated. This allows
The pseudo busy tone can be reliably transmitted to the slave station user.

Further, the CPU 6'also has a control function for controlling the generation / stop of a predetermined ON / OFF signal output to the MSK signal generator 40. The function of the CPU 6'of the control means portion is as shown in FIG. 8, for example.

That is, first, it is assumed that an extension call state is established based on an extension call from the master station or the slave station side (ST1). This state means that the CPU 6 '
Is detecting. In this state, it is judged whether or not there is an extension call termination processing command (pressing the extension button of the master station, on-hook of the master station) from the master station side (ST2), and if there is such a command, the CPU 6 ' To the MSK signal generator 40
A digital signal composed of the same code is intermittently applied to generate a pseudo busy tone from the MSK signal generator 40, and the pseudo-busy tone is output so as to be superimposed on the speech path from the master station to the slave station and transmitted to the slave station side. Yes (ST3).

As a result, even if the user of the slave station suddenly hangs up the extension call regardless of his / her intention, if the extension call is based on the instruction from the master station side, the pseudo busy tone is received by the handset 2 as described above.
Since it is output from 0b, it will not be erroneously recognized as a failure. When the user of the slave station receives the pseudo busy tone, the user presses the extension button, and the CPU 29 sends an end signal to the master station based on the push button. When the CPU 6'of the master station receives the signal accompanying the push of the extension button on the slave station side, the MS 6
The output of the intermittent digital signal to the K signal generator 40 is stopped. Then, since the MSK signal generator 40 does not input the digital value, the generation of the pseudo busy tone is stopped, and the transmission of the pseudo busy tone to the slave station is stopped (ST4, 5). The above steps 2 to 5 are functions as a control means. Thus, by stopping the transmission of the pseudo busy tone after waiting for the response from the slave station side, the slave station user can surely confirm that the extension call end processing has been performed on the master station side. it can.

Then, in this example, after that, the master station is put in a standby state, or when the extension call is made for the transfer of an outside call and the parent station goes out to the outside line, the standby state is set. Instead, the hold state is released (performed based on the control signal from the CPU 6 '), and the speech processor 2 is operated to perform a predetermined process such as connecting the master station and an outside line. On the slave station side, the CPU 29 outputs a signal corresponding to the pressing of the extension button to the master station and then returns to the standby state. That is, the CPU 6'installed in the master station constitutes the control means.

In each of the above-mentioned embodiments, the condition for stopping the output of the signal for generating the pseudo busy tone to the tone generating section 33 or the MSK signal generating section 40 of the CPU 6'is defined by the extension call completion signal from the slave station side. However, the present invention does not necessarily have to have such a configuration. For example, if a pseudo busy tone is output for a certain period, the output may be stopped regardless of whether or not there is a response from the slave station side ( (See FIG. 9).

In this case, for example, Japanese Patent Publication No. 4-
As shown in No. 8983, the pseudo busy tone is stopped, the standby station return command is sent from the CPU 6, 6'of the master station to the slave station, and the CPU 29 of the slave station which received the command performs the extension termination processing. You may make it into a waiting state. That is, if there is no response from the slave station side even if the busy tone is output for a certain period of time, the slave station user may recognize that the extension call has ended, but may forget to press the extension button. In such a case, it is possible to avoid the situation in which the pseudo busy tone is continuously transmitted.

As in the above-described embodiment, the condition for stopping the output of the pseudo busy tone generation signal from the tone generation unit 33 and the CPU 6'to the MSK signal generation unit 40 is set to the extension call completion signal from the slave station side. As a general rule, after the pseudo busy tone output is started, if there is no response from the slave station side for a certain period, the output may be stopped (see FIG. 10).

Further, in each of the above-described embodiments and modifications, the processing of putting the master station into the standby state or connecting to the outside line is performed after the output of the pseudo busy tone is stopped. The present invention is not limited to this, and each process (return to the standby state, external line connection) may be performed at the same time as the output of the pseudo busy tone is started. Then, even if it is put in a standby state or connected to an external line, the output of the tone generating section 33 can be transmitted to the slave station side via the voice compressing section 10a to the transmitting section 12, while the extension call end signal from the slave station is transmitted. Can also be received by the CPUs 6 and 6'through the receiving unit 14.

[0040]

As described above, in the cordless telephone device according to the present invention, when the master station and the slave station are wirelessly connected to each other and are in an extension call state, the extension call is terminated on the side of the master station. With this process, it is possible to output a pseudo busy tone and other predetermined messages to the slave station, so even if the user of the slave station suddenly hangs up the extension call regardless of his / her intention, It is possible to know that the extension call has ended by an instruction from the master station side, and there is no fear of being mistakenly recognized as a failure or the like.

In the case of the second aspect, the device for outputting the intermittent tone such as the pseudo busy tone is conventionally controlled between the master pole and the slave station. The MSK signal generator installed to generate the signal can be used as it is, and the software in the controller (CPU) can be used to change the state of the output signal of the controller (CPU) to the MSK signal generator. Since it is only necessary to change the parts, it is not necessary to add new parts.

[Brief description of drawings]

FIG. 1 is a block configuration diagram on a master station side showing a first embodiment of a cordless telephone device according to the present invention.

FIG. 2 is a block diagram of a cordless telephone device according to a first embodiment of the present invention on the slave station side.

FIG. 3 is a CPU of a master station which is a control unit in the first embodiment.
It is a flowchart figure which shows an example of the function of.

FIG. 4 is a block diagram of a master station side showing a second embodiment of the cordless telephone device according to the present invention.

FIG. 5 is a block configuration diagram on the slave station side showing a second embodiment of the cordless telephone device according to the present invention.

FIG. 6 is a timing chart illustrating a general function of an MSK signal generator.

FIG. 7 is a timing chart illustrating an operation of outputting an intermittent sound, which is an essential part of the second embodiment.

FIG. 8 is a CPU of a master station as a control means in the second embodiment.
It is a flowchart figure which shows an example of the function of.

FIG. 9 is a flowchart showing another example of the function of the CPU of the master station as the control means.

FIG. 10 is a flowchart showing another example of the function of the CPU of the master station as the control means.

[Explanation of symbols]

6,6 'CPU (control means) 33 tone generator (extension call end message output means) 33 MSK signal generator

Claims (5)

[Claims] 1. A master station connected to a telephone line and provided with a transceiver, and a slave station wirelessly connectable to the master station, wherein the slave station is connected to an outside line through the master station. In addition, in the cordless telephone device capable of making an extension call with the parent station, the parent station is provided with an extension call termination message generating means, and when the extension call is made, a predetermined extension call termination process is performed on the parent station side. A cordless telephone device comprising a control means for detecting that a call has been made, activating the extension end message generating means, and outputting an extension call end message to the slave station via the radio. 2. A master station connected to a telephone line and provided with a transmitter / receiver, and a slave station wirelessly connectable to the master station, wherein the slave station is connected to an outside line via the master station. A cordless telephone apparatus capable of performing an extension call with the master station, and an MSK signal generation unit for converting a digital control signal for a slave station output from a CPU incorporated in the master station into a tone signal. Is provided, the output of the MSK signal generator is superimposed on the transmission system of the extension call to enable transmission to the slave station, and it is detected that the master station side has performed a predetermined extension call termination process during the extension call. A cordless telephone device is provided with a control means for intermittently giving the same code to the MSK signal generating section, and outputting an intermittent tone of a single frequency to the slave station via the radio. 3. After outputting the extension call end message,
3. The cordless telephone device according to claim 1, wherein the extension end message generating means is operated until an extension call completion signal is received from the slave station side. 4. The control unit according to claim 1, further comprising a function of stopping the output of the extension call termination message when a predetermined period has elapsed after the start of the output of the extension call termination message. Cordless telephone device. 5. The cordless telephone device according to claim 1, wherein the extension call termination message is a pseudo-generated busy tone.