JPH0831904B2 - Telephone device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a telephone device which is used by connecting to a subscriber telephone network or the like.

(Prior art) As a communication means for various matters such as communication and meetings,
Telephones have been widely used in the past. A telephone is very convenient because it allows you to easily make a real-time call with a person at any place regardless of distance.

By the way, when a telephone call is being made by the telephone device, for example, the telephone device is often put on hold during a call, or even if the call is not put on hold, the telephone device is often left temporarily while keeping the call state. In such a case, the speaker who becomes the held party or the call waiting side cannot communicate with the other party until the other party releases the hold or returns to the call. For this reason, for example, it is possible to make an urgent need during the above-mentioned hold or before the other speaker returns to the call, and even if the user wants to disconnect the call by this, he / she must wait until the other speaker returns to the call. was there.
Also, if you disconnect the line without waiting for the other party to return to the call, the other party who returns to the call does not know the reason why the line is disconnected, so you may feel anxious and wait for the incoming call from the other party. Or, it was troublesome because I had to make an extra call to the other party.

(Problems to be Solved by the Invention) As described above, in the conventional telephone device, when one speaker leaves the device during a call, the other speaker wants to disconnect the line, but There is a problem that you have to wait until you return to the call, or if you disconnect the line without waiting, the other party who returns to the call does not know the reason for disconnecting the line It was happening.

Therefore, the present invention pays attention to the above situation, and even when one speaker temporarily disconnects from the call during a call and the other speaker needs to disconnect the line, the line can be generated without causing a problem. It is possible to disconnect the caller, thereby reducing the irritation and anxiety of the speaker, taking an appropriate response after disconnecting, and connecting to the telephone network that does not have the function of sending the end call signal. The purpose is to provide a telephone device.

[Configuration of the Invention] (Means for Solving the Problems) The present invention relates to the above-mentioned telephone device used in a system which enables a telephone call by connecting a plurality of telephone devices through a line including a telephone network. When a predetermined operation for notifying the disconnection of a line is performed during a call by providing a notification means, in response to this operation, predetermined disconnection notification information is generated, and this information is generated before disconnection of the line. Disconnection notification monitoring means for transmitting to a telephone device of a call partner through a line including the telephone network and monitoring whether predetermined line disconnection notification information arrives from the phone device of the call partner during a call, Disconnection notification means is provided, and when the disconnection notification monitoring means detects the arrival of the line disconnection notification information, the disconnection notification means notifies the speaker that the other party disconnects the line. is there.

The present invention is also adapted to respond to a hold release operation or a call end operation when notifying that the line has been disconnected,
It is also characterized in that a predetermined multi-frequency signal or a voice signal is used as the line disconnection notification information, and further that a visual display by a display or a loud sound output unit of a notification sound or a voice message is used as the notification unit.

Another aspect of the present invention is to provide means for transmitting preset line disconnection notification information in response to a call end operation to a telephone device of a call partner through a line including a telephone network before disconnecting the line, and during a call. Is provided with disconnection notification monitoring means for monitoring whether predetermined line disconnection notification information comes from the telephone device of the other party, and disconnection notification means, and the disconnection notification monitoring means detects the arrival of the line disconnection notification information. In this case, the disconnect notification means notifies the speaker that the other party has disconnected the line.

(Operation) As a result, according to the present invention, when one speaker disconnects the line during a call, by transmitting predetermined line disconnection notification information by operating a dial key, for example, in the other telephone device. The speaker is notified that the line has been disconnected. Therefore, when one speaker needs to disconnect the line due to urgent need while being held or while waiting for a call, it sends the line disconnection notification information without waiting until the other speaker returns to the call. After that, the line can be immediately disconnected. Therefore, the frustration of the one speaker is eliminated.
In addition, the speaker who performed the hold operation or who left the call, even if the call was disconnected when returning to the call,
Since the fact that the line has been disconnected is notified, this notification allows the other party to know that the line has been disconnected due to some circumstances. Therefore, there is no need to wait for an incoming call from the other party with anxiety or to make a troublesome re-call, and an appropriate response can be taken.

Further, according to the present invention, the telephone device on the terminating end generates line disconnection notification information and sends it to the telephone device of the other party via the line including the telephone network before disconnecting the line, and The telephone device detects and notifies the line disconnection notification information. That is, the line disconnection notification information is generated in the telephone device and is sent to the telephone device of the other party via the line. For this reason,
For example, even when connected to an exchange that does not have a function of transmitting a call termination signal, such as some private branch exchanges and US exchanges, it is possible to reliably notify the telephone device of the other party of the disconnection of the line.

According to another invention, the line disconnection notification information is automatically transmitted in response to the call termination operation, so that the speaker on the disconnecting side particularly performs an operation for transmitting the line disconnection information. There is no need for this, and operability can be improved.

(Embodiment) First Embodiment FIG. 1 shows the configuration of a telephone device in the same embodiment.

This telephone device has a call circuit 2 connected to a subscriber line 1 via a line switch LS, and a handset 3 connected to this call circuit 2, and a call signal passes through the call circuit 2 described above. Is transmitted and received between the handset 3 and the subscriber line 1. Further, the telephone device includes a control circuit 4a having a microcomputer as a main control unit, for example. This control circuit 4a is provided with an incoming / outgoing call control means. When a calling operation is detected from the state of the hook switch HS, the line switch LS is first closed to form a DC loop, and then the dial key 5 is pressed. The line switch LS is opened / closed according to the data, whereby the dial pulse is sent to the subscriber line 1. When an incoming signal of 16 Hz arrives from the exchange (not shown) via the subscriber line 1 and this is detected by the incoming call detection circuit 6, first, the tone oscillator 7 is driven to output a ringing tone signal through the drive circuit 8 and the speaker 9. To generate a ringing tone. Then, when the subscriber lifts the handset 3 in this state and responds, this is detected from the state of the hook switch HS, the line switch LS is closed and the generation of the ringing tone is stopped, and the telephone call is possible thereafter. It should be noted that when the subscriber performs a call end operation, this is detected from the state of the hook switch HS to open the line switch L, and thereafter the standby state is restored.

Further, the telephone device of this embodiment includes a hold switch DS. When the hold switch DS is pressed during a call, the control circuit 4a supplies a hold operation signal to the call circuit 2 and a drive signal to the hold sound generation circuit 11. And
The handset 3 is disconnected from the subscriber line 1, and the hold tone generated from the hold tone generation circuit 11 is sent to the subscriber line 1 and also output from the handset of the handset 3. Further, at this time, the control circuit 4a lights the hold display light emitting diode (hold LED) 12 to display that the device is on hold.

By the way, the telephone device of the present embodiment displays a DTMF detection circuit 13 for receiving a DTMF (Dual Tone Mulch Frequency) signal coming through the subscriber line 1 and that the line is disconnected at the other end of the call. A disconnection notification light emitting diode (disconnection LED) 14 for disconnection, and further has disconnection notification monitoring means 41 and disconnection notification control means 42a as new control functions of the control circuit 4a.

Of these, the disconnection notification monitoring means 41 first detects the DT during a call.
The detection signal of the MF detection circuit 13 is periodically input to monitor whether or not a predetermined DTMF signal as a line disconnection notification signal comes from the telephone device of the other party. On the other hand, the disconnection notification monitoring means 42a, when it is detected that the DTMF signal as the disconnection notification signal has arrived by the disconnection notification monitoring means 41 during a call, according to the preset predetermined control procedure, the telephone device side of the other party The disconnect LED 14 is used to notify that the line has been opened.

Next, the operation of the device configured as described above is controlled by a control circuit.
It will be described according to the control procedure of 4a. During a call with an arbitrary partner telephone device, the control circuit 4a monitors whether or not the holding switch DS is set to the holding state in step 2b as shown in FIG. 2, and the holding state is set. If not, turn off the hold LED 12 in step 2c,
In step 2d, the call end is monitored from the state of the hook switch HS. Then, when the call end is detected, the process goes to step 2e to open the line switch LS to open the line and return to the standby state.

On the other hand, if the speaker presses the hold switch DS during the above call,
The control circuit 4a shifts from step 2b to step 2f, and here supplies the hold operation signal to the communication circuit 2 and the drive signal to the hold sound generation circuit 11. Then, the handset 3 is disconnected from the subscriber line 1, and the hold tone generated from the hold tone generation circuit 11 is sent to the subscriber line 1 and is also output from the handset of the handset 3. Further, a light emitting diode (hold LED) 12 for holding display is turned on to display that the device is on hold.

Now, in the hold state, the control circuit 4a monitors the arrival of the predetermined DTMF signal in step 2g while monitoring the hold release operation in step 2b. In this state, it is assumed that the speaker of the other party urgently inputs a predetermined DTMF signal as a line disconnection notification signal by using a dial key and then disconnects the line by hooking the handset. The DTMF signal is composed of, for example, a combination of #, * and numeral keys. Above DTMF
When a signal arrives, the control circuit 4a detects this DTMF signal by the detection signal of the DTMF detection circuit 13 and shifts to step 2h, where the disconnection LED 14 blinks. And step 2
After opening the line switch LS with i to open the line,
In step 2j, the operation for releasing the hold is monitored. In this state, when the speaker presses the hold switch DS again to release the hold state, the control circuit 4a puts the hold in step 2l.
The LED 12 is turned off, but the disconnection LED 14 continues to blink for a certain period of time. Therefore, the speaker can know from the blinking operation of the disconnect LED 14 that the other speaker has disconnected the line while on hold.

Incidentally, when a certain time has elapsed from the time of releasing the hold, the control circuit 4a turns off the disconnection LED 14 in step 2l and returns to the standby state. Further, if the hold release operation is not performed even after a lapse of a predetermined time during the hold, the disconnection LED 14 is turned off after the lapse of the predetermined time in step 2k.

In this way, according to the present embodiment, the disconnect LED 14 is made to blink when a predetermined DTMF signal arrives from the callee on the hold side during the hold, so that the speaker on the hold side disconnects from the disconnect LE.
By blinking D14, you can know that the other party has disconnected the line while on hold. Therefore, if the speaker on the held side needs to disconnect the line due to an urgent need while in the hold release waiting state, the line can be disconnected immediately by inputting a predetermined DTMF signal and then performing on-hook operation. . For this reason, it is not necessary to wait until the speaker on the holding side releases the holding state, and this eliminates the annoyance. Also, even if the line is disconnected during the hold, the speaker on the hold side can know that the other speaker disconnects the line while the call is on hold, without anxiety. For example, it is possible to wait for an incoming call from the other party.

Second Embodiment FIG. 3 shows the configuration of the telephone device in the second embodiment. In the figure, the same parts as those in FIG. 1 are designated by the same reference numerals and detailed description thereof will be omitted.

This telephone device uses a liquid crystal (LCD) display 16
And a message memory 15 composed of a ROM in which notification message information is stored in advance. Further, the control circuit 4b is
A disconnection notification monitoring means 41 for monitoring arrival of a disconnection notification from a detection signal of the DTMF detection circuit 13 and a disconnection notification control means 42b having a notification message display function are provided.

In such a configuration, the control circuit 4b, as shown in FIG. 4 (a), sends a predetermined DTMF which is a line disconnection notification signal during the hold.
When a signal arrives, the disconnect LED 14 blinks in step 2h, the code of the received DTMF signal is decoded in step 4a, and then the line switch in step 2i.
Open the LS and open the line. And the control circuit 4b
As shown in FIG. 4 (b), the operation of the hold release operation is monitored, and when the hold release operation is performed by the speaker, step 2l
After the hold LED 12 is turned off in step 4, the process proceeds to step 4bi, and the notification message information corresponding to the code of the DTMF signal previously decoded here is selectively read from the message memory 15. Then, this notification message information is output to the display 16 and displayed. FIG. 5 shows an example of the contents of the DTMF code and the notification message. The above cutting
The blinking of the LED 14 and the notification message displayed on the display 16 are extinguished and erased at the time point when a fixed time has elapsed after the suspension is released in step 4d.

Therefore, according to the present embodiment, the held party speaker can inform the holding party speaker of the reason for disconnecting the line by entering the DTMF code corresponding to the reason when disconnecting the line. , Also, the speaker on the hold side, after releasing the hold operation,
By blinking the disconnect LED 14, it is possible to know that the other party has disconnected the line while the call is on hold, and the reason can be clearly known from the notification message displayed on the display 16. Therefore, it is possible to communicate between the holding side and the held side at the time of the rotational disconnection being held,
It is possible to eliminate the irritation and anxiety of both parties.

Third Embodiment FIG. 6 shows the configuration of the telephone device in the third embodiment. In the figure, the same parts as those in FIG. 1 are designated by the same reference numerals and detailed description thereof will be omitted.

This telephone device stores voice message information in advance.
Voice message memory 17 consisting of ROM and voice synthesis circuit 1
8 and the DTMF as the control function of the control circuit 4c.
A disconnection notification monitoring means 41 that monitors arrival of a disconnection notification from a detection signal of the detection circuit 13 and a disconnection notification control means 42c having a voice message output control function are provided.

In such a configuration, when the control circuit 4c enters the hold state, the hold LED 1 is set in step 2f as shown in FIG. 7 (a).
2 is lit to indicate that the call is on hold, and the arrival of the DTMF signal is monitored in step 2g. When a predetermined DTMF signal arrives from the other party in this state, the control circuit 4c decodes the code of the DTMF signal in step 7a, and then opens the line in step 2i. And
As shown in FIG. 7 (b), the operation for canceling the hold is monitored in step 2j. In this state, if the hold switch DS is pressed and the hold is released, the control circuit 4c sets the hold LE in step 2l.
After turning off D12, in step 7b, the voice message information corresponding to the DTMF code previously decoded in step 7a is selectively read from the voice message memory 17, and this voice message information is supplied to the voice synthesis circuit 18 in step 7c. To do. Therefore, a voice signal corresponding to the voice message information is generated from the voice synthesizing circuit 18, and the voice signal is amplified by the drive circuit 8 and then outputted from the speaker 9 in a loud voice. As the voice message output at this time, for example, the notification message shown in FIG. 5 is used.
The output of the voice message is repeated in step 7d by a fixed circuit, for example, twice.

In this way, according to the present embodiment, when the speaker on the hold side disconnects the line during the hold, the DTMF signal corresponding to the reason for disconnecting the line is input by the dial key and transmitted, whereby the device on the hold side is Then, when the speaker releases the holding state, a voice message indicating that the speaker on the other side disconnects the line and the reason thereof is output in a loud voice and notified to the speaker. Therefore, the speaker on the hold side can clearly know the reason why the line is disconnected in the hold state by the voice message.

Fourth Embodiment FIG. 8 shows the construction of a telephone device in the same embodiment, and the same parts as those in FIG. 6 are designated by the same reference numerals.

In addition to the configuration of the telephone device shown in FIG. 6, the telephone device of the present embodiment has a digital / analog (A / A) for converting a voice message signal arriving from a device of a communication partner via a subscriber line 1 into a digital signal. D) A conversion circuit 21, a voice message memory 20 including a RAM for storing the reception voice message information output from the A / D conversion circuit 21, and reception voice message information read from the voice message memory 20. Analog-to-analog (D / A) conversion circuit 22 that converts the sound into an analog signal and outputs the sound from the speaker 9
It has and. Also, as the control function of the control circuit 4d,
A disconnection notification monitoring means 41 for monitoring arrival of a disconnection notification from the detection signal of the DTMF detection circuit 13 and a disconnection notification control means 42d having a loudness output control function for a voice message sent from the speaker of the other party of the call are provided. ing.

In such a configuration, the control circuit 4d monitors the arrival of the DTMF signal in step 2g in the call holding state as shown in FIG. 9 (a), and in this state, it is a line disconnection notification signal from the device of the other party. When the arrival of a predetermined DTMF signal is detected, it is monitored in steps 9a and 9b whether or not a voice message arrives within a fixed time. In this state, if a voice message related to line disconnection is sent from the other party within a certain time, this voice message will be
After being converted into a digital signal by the A / D conversion circuit 21, it is sequentially written in the voice message memory 20. And step 9d
To determine whether or not reception is complete, and when reception is complete, step
Move to 2i and open the line. If the voice message does not arrive within the fixed time, the process moves to step 2i after the fixed time and the line is opened.

Then, after the line is released, when the speaker performs the hold release operation to restart the call, the control circuit 4d is shown in FIG. 9 (b).
After the hold LED 12 is turned off in step 2l as shown in, the presence or absence of the voice message received in step 9e is determined. If it is assumed that a voice message is being received, the process proceeds to step 9f, where the received voice message information is read from the voice message memory 20, and this received voice message information is sent to the D / A conversion circuit 22 in step 9g. Supply. Therefore, the voice synthesizing circuit 18 outputs a voice signal corresponding to the received voice message information, and the voice signal is amplified by the drive circuit 8 and then outputted from the speaker 9 in a loud voice. Therefore, the speaker can know from the received voice message that the other speaker has disconnected the line and the reason.

On the other hand, when the voice message does not come from the other party, the control circuit 4d moves to step 9i and RO
The ready-made voice message information is read from the message memory 19 made of M, and the ready-made voice message information is supplied to the voice synthesis circuit 18 in step 9j. As a result, a voice signal corresponding to the above-mentioned ready-made voice message information is generated from the voice synthesizing circuit 18, and this voice signal is amplified by the drive circuit 8 and then outputted from the speaker 9 in a loud voice. In other words, if the other party sends only the DTMF signal when the line is disconnected and does not send the voice message, the message memory is
The ready-made voice message stored in 19 will be output in a loud voice.

In this way, according to the present embodiment, the held party speaker can send out a free voice message when disconnecting the line, and the holding party speaker uses the above free voice message when releasing the holding party. The reason why the speaker disconnects the line and the instruction of the other speaker can be clearly known, and an appropriate response can be taken. Also, since it has a function to output the voice message of the existing voice, the speaker on the hold side does not necessarily have to send the voice message, just input the DTMF signal corresponding to the voice message of the ready voice. You can disconnect the line immediately.

Fifth Embodiment FIG. 10 shows the configuration of the telephone device in the same embodiment. In the figure, the same parts as those in FIG. 3 are designated by the same reference numerals and detailed description thereof will be omitted.

The telephone device of this embodiment includes a DTMF generation circuit 23 and further includes disconnection notification information transmission control means 43 as a new control function of the control circuit 4e. This disconnection notification information transmission control means 43 is used for the above-mentioned DTMF generation circuit before the line is released when the talker ends and the handset 3 hooks the handset 3.
A drive signal is supplied to 23, whereby a predetermined DTMF signal as a disconnection notification signal is automatically sent to the partner device.

That is, when the call end operation is performed, the control circuit 4e
As shown in FIG. 11, the process proceeds from step 2d to step 11a, where the DTMF generation circuit 23 is instructed to generate a predetermined DTMF signal. Therefore, a predetermined DTMF signal which is a disconnection notification signal is generated from the DTMF generation circuit 23, and this DTMF signal is sent to the telephone device of the communication partner via the subscriber line 1.
Then, when the transmission of the DTMF signal is completed, the control circuit 4e proceeds from step 11b to step 2e, where the line switch LS is opened to open the line.

In this way, according to the present embodiment, when the speaker on the hold side performs the call end operation, the DTMF signal which is the line disconnection notification signal is automatically sent to the speaker on the hold side. Become.
Therefore, the hold party talks to DTMF when disconnecting.
The operation and work for sending out a signal or a voice message in place of it are not necessary at all, and the handling is simplified accordingly.

The present invention is not limited to the above embodiments. For example, in the above-described embodiments, the case where the call is on hold has been described as an example. Can be carried out. FIG. 12 shows an example of the control procedure and control contents of the control circuit in that case, and the arrival of a predetermined DTMF signal is monitored in step 12b during a call, and the line disconnection notification signal is sent in this state. When a predetermined DTMF signal arrives, the line is immediately released in step 12e. Then, after this line is opened, a notification sound is output for a predetermined time from the speaker 9 for generating the ringing sound in step 12d. Therefore, even if the other party disconnects the line while the speaker is temporarily away from the telephone device without holding the call, the fact that the speaker is away from the telephone device is notified to that effect. become.

Further, in this case, the notification that the line has been disconnected may be performed when the speaker returns to the call and hooks the handset. In this way, when the speaker returns to the telephone device, the other party's line disconnection is notified, so that the speaker can be sure that the other party has disconnected the line. it can. At this time, as in the second to fourth embodiments, if a notification message is displayed or aloud in addition to the notification sound or the blinking of the LED, the reason for disconnecting the line can be surely given to the speaker. It's even more convenient because you can tell.

Further, although the case where the DTMF signal is used as the line disconnection notification signal has been described in the above embodiment, a specific voice signal may be used instead of the DTMF signal. As a specific audio signal, for example, a combination of pronunciations that do not have meaning that is not used in normal and ordinary calls, and even if they have meaning, they are mostly used in normal calls such as "line disconnection" and "disconnection disconnection". It suffices to use words that are not present, and the device on the receiving side may be configured to recognize and detect the patterns of these voice signals by the voice recognition circuit. In addition, when the voice signal is used as the line disconnection notification signal in this way, it may be difficult to distinguish the voice signal from the hold tone. To improve this, for example, a blank part for a few seconds where a voice signal does not intermittently exist in the hold tone is provided, and the speaker on the hold side puts a voice signal as a line disconnection notification signal in this blank part. It may be inserted and sent out. At this time, if a guide message indicating the meaning of the blank portion is inserted at the beginning of the held sound, it is possible to clearly inform the person to be held of the meaning of the blank portion in the held sound.

Further, in the third, fourth, and fifth embodiments, the voice message is reproduced by using the voice synthesizing circuit, the A / D converting circuit, and the D / A converting circuit. However, a tape recorder or the like is used. You may make it record and reproduce. Further, in each of the above-described embodiments, the notification that the line has been disconnected is performed by selectively using an optical display means or a means using an audible sound, but both may be used in combination. Alternatively, other means such as vibration may be used. In addition, although an indicator for disconnection notification may be provided as an optical display means, an LCD indicator for displaying the call time, an LED for displaying the on-hook transmission mode, a dial keypad itself as an indicator, etc. If there are existing indicators of the above, these indicators may be used.

Furthermore, in each of the embodiments described above, the case where the line disconnection notifying means and the line disconnection notifying means are provided in the telephone device has been described. However, an additional device having these functions is prepared, and this additional device You may make it exhibit the same function by adding to a telephone device.

In addition, the type and content of the line disconnection notification information, the type and configuration of the line disconnection notifying means, the control procedure and control content of the control circuit, and the like can be variously modified and implemented without departing from the scope of the present invention.

[Effects of the Invention] As described in detail above, the present invention provides
When a predetermined operation to notify the disconnection of a line is performed during a call, a predetermined line disconnection notification information is generated in response to this operation, and this information is called through a line including the above telephone network. A disconnection notification monitoring means for sending out to the other party's telephone device and monitoring whether or not predetermined line disconnection notification information arrives from the other party's telephone device during a call, and a disconnection notification means are provided, and the disconnection notification monitor is provided. When the means detects the arrival of the line disconnection notification information, the disconnection notifying means notifies the speaker of the fact that the other party disconnects the line.

Another aspect of the present invention is to provide a means for transmitting preset line disconnection notification information to a telephone device of a call partner before disconnecting the line in response to a call end operation, and to predetermine from the telephone device of the call partner during a call. Disconnection notification monitoring means for observing whether or not the line disconnection notification information arrives, and disconnection notification means, and when the disconnection notification monitoring means detects the arrival of the line disconnection notification information, the disconnection notification means Is used to notify the speaker that the other party has disconnected the line.

Therefore, according to these aspects of the invention, even when one speaker temporarily disconnects from the call during a call and the other speaker needs to disconnect the line, the line is disconnected without causing a problem. As a result, it is possible to provide a telephone device that can reduce the speaker's irritation and anxiety and can take an appropriate response after the disconnection.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a configuration of a telephone device according to a first embodiment of the present invention, FIG. 2 is a flow chart showing a control procedure and control contents of a control circuit in the same device, and FIG. FIG. 4 is a functional block diagram showing the configuration of the telephone device in the second embodiment, FIG. 4 is a flow chart showing the control procedure and control contents of the control circuit in the device, and FIG.
The figure shows an example of DTMF code and notification message.
FIG. 6 is a functional block diagram showing a configuration of a telephone device according to a third embodiment of the present invention, FIG. 7 is a flow chart showing a control procedure and control contents of a control circuit in the same device, and FIG. 8 is a diagram showing the present invention. 4 is a functional block diagram showing the configuration of the telephone device in the fourth embodiment, FIG. 9 is a flowchart showing the control procedure and control contents of the control circuit in the same device, FIG.
FIG. 10 is a functional block diagram showing the configuration of a telephone device in the fifth embodiment of the present invention, FIG. 11 is a flow chart showing the control procedure and control contents of the control circuit in the same device, and FIG.
The figure is a flow chart showing the control procedure and control contents of the telephone device in another embodiment of the present invention. 1 ... subscriber line, 2 ... call circuit, 3 ... handset, 4a, 4b, 4c, 4d, 4e ... control circuit, 5 ... dial key, 6 ... incoming detection circuit, 7 ... tone oscillation Circuit, 8 ...
… Drive circuit, 9 …… Speaker, 11 …… Holding sound generation circuit,
12 …… Light-emitting diode for hold display (hold LED), 13 …… D
TMF detection circuit, 14 ... Light emitting diode for disconnection display (disconnection L
ED), 15,17,19,20 ... message memory, 16 ... LCD display, 18 ... voice synthesis circuit, 21 ... analog / digital (A / D) conversion circuit, 22 ... digital / analog ( D /
A) conversion circuit, 23 ... DTMF generation circuit, 41 ... disconnection notification monitoring means, 42a, 42b, 42c, 42d ... disconnection notification control means, 43 ...
... disconnection notification information transmission control means, LS ... line switch,
HS ... hook switch, DS ... hold switch.

Claims (8)

[Claims] 1. A predetermined operation for notifying disconnection of a line during a call in the above-mentioned telephone device used in a system which enables a call by connecting a plurality of telephone devices through a line including a telephone network. In response to this operation, predetermined line disconnection notification information is generated in response to this operation, and this line disconnection notification information is sent to the telephone device of the other party via the line including the telephone network before the line is disconnected. Disconnection notification means, a disconnection notification monitoring means for monitoring whether disconnection notification information arrives from a telephone device of the other party during a call through a line including the telephone network, and the disconnection notification monitoring means A telephone device comprising: a disconnection notifying unit for notifying a speaker that the other party has disconnected the line when the arrival of the line disconnection notification information is detected. 2. The disconnection notification monitoring means monitors arrival of line disconnection notification information from the telephone device on the held side during call hold,
The disconnection notifying means notifies the speaker that the other party disconnects the line in response to the operation for releasing the call hold when the disconnection notification monitoring means detects the arrival of the line disconnection notification information. The telephone device according to claim 1. 3. A disconnection notifying means generates a predetermined multi-frequency signal as line disconnection notification information, sends the multi-frequency signal to a telephone device of a communication partner through a line including the telephone network, and notifies disconnection. The monitoring means has a multi-frequency signal detection means,
3. The telephone device according to claim 1, wherein it is monitored whether or not the predetermined multi-frequency signal arrives from a telephone device of a call partner via a line including the telephone network. 4. The disconnection notifying means generates a predetermined voice signal as line disconnection notification information, sends the voice signal to a telephone device of a call partner through a line including the telephone network, and disconnection notice monitoring means. 3. The apparatus according to claim 1, further comprising a voice recognizing unit, and monitoring whether or not the voice signal arrives from a telephone device of a communication partner via a line including the telephone network.
Or the telephone device according to 2. 5. The disconnection notifying means, when the disconnection notification monitoring means detects the arrival of the line disconnection notification information, notifies the speaker of the fact that the other party disconnects the line in response to the end call operation. The telephone device according to claim 1, wherein: 6. The telephone device according to claim 1, wherein the disconnection notifying means notifies by visually displaying on the display that the other party has disconnected the line. 7. The telephone device according to claim 1, wherein the disconnection notifying means notifies the fact that the other party has disconnected the line by outputting a notification sound or a voice message. 8. In the above-mentioned telephone device used in a system which enables telephone communication by connecting the telephone device through a line including a telephone network, this operation is performed when a call end operation is performed during a telephone call. Responsive to generating predetermined line disconnection notification information, and sending this line disconnection notification information to the other party's telephone device via the line including the telephone network before disconnecting the line, and a disconnection notification means Disconnection notice monitoring means for monitoring whether or not disconnection notice information arrives from the telephone device of the other party via the line including the telephone network, and the disconnection notice monitor means detects the arrival of the line disconnection notice information. And a disconnection notifying means for notifying the speaker that the other party has disconnected the line in the case of a call.