JP4393694B2 - Telephone device having busy tone elimination filter and door phone - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a telephone device capable of communicating with a door phone and a door phone capable of communicating with the telephone device, and more particularly to a technique for removing busy sound.
[0002]
[Prior art]
Conventionally, in a telephone device that can connect to and communicate with both a telephone line and a door phone, for example, when a resident is out, a visitor calls the telephone device in the residence with a door phone attached to the entrance. In this case, the telephone device can be connected to a mobile terminal such as a mobile phone by transferring the call to the mobile terminal via the telephone line, and the door phone and the mobile phone can communicate with each other via the telephone device. Some have a transfer function.
Therefore, the transfer function of the telephone device enables the resident to respond to the visitor at the entrance while on the go.
[0003]
[Problems to be solved by the invention]
In addition, conventional telephone devices detect busy tone (Busy Tone) generated from the telephone line after the end of the call when the correspondence with the visitor is completed and the mobile phone is ended. In some cases, the end of the mobile phone is detected and the call with the mobile phone is disconnected.
In the case of the telephone device that detects the end of the call by detecting the busy sound, the busy sound is output from the telephone device to the door phone.
[0004]
Therefore, the visitor may know that the response by the doorphone is transferred to the terminal such as an external mobile phone through the telephone line by the telephone device by the busy sound. This makes it possible for a visitor to know the absence of a resident, leaving anxiety in terms of security.
[0005]
On the other hand, when a mobile phone is terminated, the end of the cellular phone is detected by detecting a local line interruption that occurs when the polarity of the telephone line is reversed immediately after the end of the call (before the busy tone is generated). There is also a telephone device that disconnects a call with a mobile phone.
In the case of a telephone device that detects the end of the call by detecting the instantaneous disconnection of the local line, since the call with the mobile phone is disconnected before the busy sound is generated, the busy sound is output from the telephone device to the door phone. Absent.
[0006]
However, even when this telephone device can use the communication incoming call function (Catch Phone: registered trademark) and a call is made from a third party, the telephone line is disconnected instantaneously.
Therefore, in the telephone device that detects the end of the call by detecting the instantaneous disconnection of the local line, when a call is made from a third party, the call with the mobile phone is disconnected. There is a problem that communication with a mobile phone is interrupted.
[0007]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a telephone device and a door phone that are highly safe without outputting a busy tone.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a telephone device of the present invention is a telephone device having a function of connecting to and communicating with both a telephone line and a door phone, and the door phone with respect to a terminal connected to the telephone line. the communication from the transfers, and the telephone control unit to terminate communication by detecting a busy tone to be generated from the telephone line during call termination of the terminals, the busy tone for the audio output to the intercom And a filter to be removed.
[0009]
According to this telephone device, since the end of the call is not detected by detecting the instantaneous disconnection of the office line, the call disconnection between the door phone and the terminal due to the communication incoming call function is eliminated.
In addition, since the filter for removing the busy sound generated from the telephone line with respect to the sound output to the door phone is provided, the busy sound is not output to the door phone. Therefore, the visitor's correspondence is transferred to the external terminal through the telephone line by the telephone device, so that the visitor is not informed and the safety is improved.
[0010]
The telephone device of the present invention has an insertion switching unit that inserts and switches the filter for audio output to the door phone,
The telephone control unit switches the insertion switching unit during the transfer to insert the filter.
[0011]
According to this telephone device, since the filter is inserted at the time of transfer in which busy sound is generated, the busy sound is not output to the door phone, and the filter is not inserted except at the time of transfer. The band that contains the busy tone is not removed.
[0016]
The door phone of the present invention includes a door phone filter that removes busy sound generated from the telephone line when the call is ended when communication is transferred by the telephone device via the telephone line .
[0019]
According to this door phone, since the busy tone of the telephone line in Japan is approximately 400 Hz, the busy tone can be blocked by the filter having the cutoff frequency.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
The telephone device of the present invention will be described with reference to the following drawings.
[First Embodiment]
FIG. 1 is a configuration diagram of a telephone device system according to the present embodiment, and FIG. 2 is a filter characteristic diagram.
[0021]
The telephone device system according to the present embodiment includes a telephone device 10 connected to a telephone line 70 indoors, and a door phone 50 connected to the telephone device 10 via a door phone adapter 30 and installed at a front door. .
First, the configuration of the telephone device 10 will be described in detail. The telephone device 10 includes a telephone control unit 12, an operation unit 14, an input / output unit 16, a telephone line input / output unit 18, a filter 20, and an insertion switching unit 22.
[0022]
The telephone control unit 12 is connected to each unit in the telephone device 10 and controls each unit or performs processing corresponding to an input signal from the unit. For example, by controlling the telephone line input / output unit 18, communication with the telephone line 70, other telephone devices 72 connected to the telephone line 70, portable terminal devices connectable via the base station 74, For example, communication with a terminal such as a mobile phone 76 is enabled.
[0023]
The telephone control unit 12 can also communicate with the door phone 50 via the door phone adapter 30. For example, an indoor telephone device 10 can be used to answer a call from the door phone 50 by a visitor who has visited the front door.
Furthermore, the telephone control unit 12 performs control based on a transfer function for transferring a call from the door phone to a terminal connected to the telephone line 70. For example, if the transfer function of the telephone device 10 is operated (transfer mode) by an input operation to the operation unit 14 when going out, when a call is made from the door phone 50, the call is set to a preset terminal (others). By making a transfer call to the telephone device 72 or the mobile phone 76) and causing the doorphone 50 to communicate with the terminal, the terminal can make a call with the visitor on the doorphone 50 side.
[0024]
The storage unit 12a includes a communication history such as a telephone number corresponding to an abbreviated dial of the telephone device 10, a telephone number that has recently been called (or that has been called), including a telephone number of a transfer destination terminal described later. Is a storage unit that stores. The storage in the storage unit 12 a is stored by inputting a number from the operation unit 14, or the communication history is automatically stored by performing communication through the telephone line 70.
[0025]
The operation unit 14 is used for input to the storage unit 12a, input of a telephone number when a call is made from the telephone device 10 to another telephone device 72, and input of various settings such as a transfer function. It consists of a combination of a numeric keypad and a plurality of function keys.
The input / output unit 16 includes an acoustic input / output unit for inputting / outputting sound such as a receiver, a speaker, and a microphone (not shown), and a display unit for displaying a telephone number, input guidance, setting status, and the like. When the door phone 50 is provided with an imaging device such as an outdoor shooting camera, the input / output unit 16 includes a monitor that displays a captured image of the outdoor shooting camera.
The telephone line input / output unit 18 is an interface for connecting the telephone device 10 to the telephone line 70, and communicates with the telephone line 70 under the control of the telephone control unit 12.
[0026]
The filter 20 is a band-pass filter for removing the busy sound from the audio output output to the door phone 50, and is constituted by a digital signal processing circuit. When the telephone device is designed, the cutoff frequency, Q value, attenuation, etc. It can be set. Of course, a known analog circuit may be used.
In addition, the busy sound is generated in a period of 0.5 seconds and pauses for 0.5 seconds. Since the frequency at the time of occurrence is specified within 400 ± 20 Hz, the cutoff frequency of the filter 20 is It is set to about 400 Hz so that the busy sound can be removed. In the present embodiment, the Q value of the filter 20 is set to 200, and the attenuation is set to −40 dB. FIG. 2 shows a filter characteristic diagram of the filter 20.
[0027]
The insertion switching unit 22 is controlled by the telephone control unit 12 and switches so that the filter 20 is inserted into the audio output to the door phone 50 when the transfer function is operated. Then, other than at the time of transfer, for example, at the time of a call from the handset of the telephone device 10, the voice output from the telephone control unit 12 is controlled to be output as it is without inserting the filter 20.
The above is the configuration of the telephone device 10.
[0028]
Next, the door phone adapter 30 is an adapter that is interposed between the door phone 50 and the telephone device 10, and is also an interface that performs mutual communication between the door phone 50 and the telephone device 10, and is installed indoors, for example. Further, in the present embodiment, the door phone adapter 30 is configured as a separate body, but may be configured to be housed in the telephone device 10.
[0029]
The door phone 50 includes a door phone control unit 52, a door phone input / output unit 54, and a door phone operation unit 56.
The door phone control unit 52 is a unit that controls each unit in the door phone and communicates with the telephone device 10 via the door phone adapter 30. For example, when a call is made to the telephone device 10 by the operation of the door phone operation unit 56, control is performed so that a chime sound is output from the door phone input / output unit 54, and communication (call) with the telephone device 10 is controlled. Make a call.
[0030]
The doorphone input / output unit 54 includes an acoustic input / output unit for inputting / outputting sound, such as a speaker and a microphone (not shown), and an imaging device such as an outdoor photographing camera for photographing a visitor. The door phone operation unit 56 is provided with at least an operation button for calling.
The above is the configuration of the telephone device system.
[0031]
Next, the operation of the telephone device system configured as described above will be described with reference to FIG. FIG. 3 is a flowchart showing the operation of the telephone device system in this embodiment.
First, the telephone number of the transfer destination terminal is set by the key of the operation unit 14 of the telephone device 10 (step 1). Alternatively, the transfer destination may be selected from a list of telephone numbers stored in advance in the storage unit 12a.
Next, when the telephone device 10 is set to the transfer mode in which the transfer function operates, the telephone control unit 12 controls the insertion switching unit 22 to switch the filter 20 to the voice output to the door phone 50 (step 2). Thus, the telephone device 10 is set to the transfer mode.
[0032]
Thereafter, when the visitor operates the doorphone operation unit 56 of the doorphone 5 and calls the indoor telephone device 10, the telephone device 10 set in the transfer mode in step 2 is preset in step 1. The transfer call is made to the transfer destination terminal such as the mobile phone 76 (step 4).
In response to this call at the transferred terminal, communication between the terminal and the telephone device 10 is performed (step 5), and sound from the terminal is output to the intercom 50 through the filter 20 (step 6).
[0033]
When the call between the door phone 50 and the terminal is completed and the terminal is finished (step 7), a busy sound is generated from the telephone line 70. Therefore, the telephone device 10 detects the closed call by detecting the busy sound. To disconnect the call with the terminal (step 8).
Here, the telephone device 10 detects the end of the call using the busy sound. However, since the filter 20 is inserted into the sound output to the door phone 50, the end sound is output to the door phone 50. No.
Therefore, even when the user is out, the visitor who operates the door phone 50 is not known to be absent, so safety is improved.
[0034]
[Second Embodiment]
A second embodiment of the present invention will be described with reference to FIG.
FIG. 4 is a configuration diagram showing the configuration of the door phone in the telephone device system.
In the first embodiment, the filter 20 is configured in the telephone device 10, but instead, the same effect can be obtained by configuring the door phone filter 58 in the door phone 50 as shown in FIG. It is done. Note that the filter characteristic of the door phone filter 58 is the same as that of the filter 20.
In the case of the present embodiment, the configuration is the same as that of the telephone device system of the first embodiment except that the filter 20 and the insertion switching unit 22 in the telephone device 10 are eliminated.
[0035]
In the case of this embodiment, the transfer mode set by the telephone device 10 is detected by the door phone control unit 52. In this transfer mode, the door phone control unit 52 inserts the door phone filter 58 into the audio output output from the door phone input / output unit 54.
Therefore, the busy sound is not output from the door phone 50 even when the telephone device 10 detects the end of the call in the transfer mode.
[0036]
In the first and second embodiments, the telephone number of the transfer destination and the transfer mode are set by the operation unit 14 of the telephone device 10, but may be set from a terminal on the go. In this case, even if the user forgets to set the transfer mode and goes out, the transfer mode can be set from the outside.
[0037]
【The invention's effect】
According to this telephone device, since the end of the call is not detected by detecting the instantaneous disconnection of the office line, the call disconnection between the door phone and the terminal due to the communication incoming call function is eliminated.
In addition, since the filter for removing the busy sound generated from the telephone line with respect to the sound output to the door phone is provided, the busy sound is not output to the door phone. Therefore, the visitor's correspondence is transferred to the external terminal through the telephone line by the telephone device, so that the visitor is not informed and the safety is improved.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a telephone device system.
FIG. 2 is a filter characteristic diagram.
FIG. 3 is a flowchart showing the operation of the telephone device system in the present embodiment.
FIG. 4 is a configuration diagram showing a configuration of a door phone in the telephone device system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Telephone apparatus 12 Telephone control part 12a Memory | storage part 14 Operation part 16 Input / output part 18 Telephone line input / output part 20 Filter 22 Insertion switching part 30 Door phone adapter 50 Door phone 52 Door phone control part 54 Door phone input / output part 56 Door phone operation part 58 Door phone side Filter 70 Telephone line 72 Telephone device 76 Mobile phone

Claims (3)

A telephone device having a function of connecting to and communicating with both a telephone line and a door phone , wherein communication from the door phone is transferred to a terminal connected to the telephone line, telephone apparatus characterized by comprising: a telephone control unit to terminate communication by detecting the busy tone to be generated from the telephone line, and a filter for removing the busy tone for the audio output to the intercom.   An insertion switching unit that inserts and switches the filter with respect to an audio output to the door phone, and the telephone control unit switches the insertion switching unit and inserts the filter during the transfer. 1. The telephone device according to 1. A door phone capable of communicating with a telephone device, comprising: a door phone filter that removes a busy tone generated from the telephone line at the end of a call when communication is transferred through the telephone line by the telephone device. The door phone.

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