JP5109440B2 - Terminal status notification device and method, program, call control server - Google Patents

Description

  The present invention relates to a telephone control technique, and more particularly to a terminal state notification technique for notifying a calling telephone terminal of the state of a receiving telephone terminal.

In a general telephone device, as a function for confirming an incoming call when there is no call, an incoming call history is stored in a memory, and the incoming call history is read from the memory and displayed on a display unit such as an LCD according to a user's history browsing operation. There is a function to display.
Further, a technique has been proposed in which a caller telephone number stored as an incoming call history in a memory is read and automatically transmitted using such an incoming call history in accordance with a user operation (for example, Patent Documents). 1 etc.).

JP-A-3-268550

However, in such a conventional technology, the user of the receiving side telephone terminal can confirm the presence / absence of the incoming call by browsing the incoming call history, but the user of the calling side telephone terminal cannot confirm the state of the receiving side telephone terminal. There was a problem.
For this reason, even if there is no user on the receiving side, it is necessary to make a call again or periodically and repeatedly, which places a heavy burden on the calling side user in terms of operation and spirit.
The present invention has been made to solve such a problem, the terminal status notification device and method the user can check the status of the called telephone terminal of the calling telephone terminal, a program, to provide a call control server It is an object.

In order to achieve such an object, a terminal status notification device according to the present invention is connected to a telephone terminal via a communication network, and transmits and receives various control messages to and from the telephone terminal. A storage unit that stores, as monitoring information, a monitoring source telephone terminal that has requested monitoring of the status of the monitoring destination telephone terminal and a terminal status indicating absence / absence release of the monitoring destination telephone terminal regarding the monitoring destination telephone terminal to be monitored In response to receiving a setting message indicating absence / absence cancellation from the monitoring destination telephone terminal, the absence / absence cancellation state of the monitoring destination telephone terminal is detected, and this terminal state is associated with the monitoring destination telephone terminal. The terminal status monitoring unit registered in the monitoring information and the monitoring information on the monitoring source telephone terminal corresponding to the monitoring destination telephone terminal in response to the detection of the absence of the monitoring destination telephone terminal by the terminal status monitoring unit Confirmed, the terminal state notifying unit for notifying absence releases the monitoring telephone terminal to the monitoring source telephone terminal, in response to reception of the incoming messages from any telephone terminal for monitoring telephone terminals in the absence state, the A call control unit is provided for confirming whether or not the originating telephone terminal matches the monitoring source telephone terminal of the monitoring destination telephone terminal by monitoring information, and notifying the monitoring destination telephone terminal of an incoming call according to the match .

  Further, in response to reception of a response message from the monitoring destination telephone terminal with respect to the incoming call, the terminal status notification unit confirms the monitoring source telephone terminal corresponding to the monitoring destination telephone terminal with the monitoring information and sends the monitoring source telephone terminal to the monitoring source telephone terminal. While notifying the absence of the monitoring destination telephone terminal, the registration of the monitoring source telephone terminal for the monitoring destination telephone terminal in the monitoring information may be deleted.

In addition, the terminal status notification method according to the present invention includes a communication step of connecting to a telephone terminal via a communication network by a communication interface unit, and transmitting and receiving various control messages to and from the telephone terminal, and a status by a storage unit. A storage step of storing, as monitoring information, a monitoring source telephone terminal that requested monitoring of the status of the monitoring destination telephone terminal and a terminal status indicating absence / absence release of the monitoring destination telephone terminal regarding the monitoring destination telephone terminal to be monitored In response to receiving a setting message indicating absence / absence cancellation from the monitored telephone terminal, the terminal status monitoring unit detects the absence / absence cancellation status of the monitored telephone terminal and monitors the terminal status. The terminal status monitoring step of registering in the monitoring information in association with the destination telephone terminal and the terminal status notification unit detect the absence of the monitoring destination telephone terminal by the terminal status monitoring unit. Depending on the monitoring source telephone terminal corresponding to the monitoring telephone terminal confirmed by monitoring information, the terminal state notifying step of notifying the absence releases the monitoring telephone terminal to the monitoring source telephone terminal, the call control unit In response to reception of an incoming message from any telephone terminal to the monitoring destination telephone terminal in the absence state, the monitoring information checks whether the calling telephone terminal matches the monitoring source telephone terminal of the monitoring destination telephone terminal, and A call control step of notifying the monitoring destination telephone terminal of an incoming call in accordance with the match .

In addition, the program according to the present invention is connected to a telephone terminal via a communication network and transmits / receives various control messages to / from the telephone terminal, thereby setting a terminal state indicating absence / absence release of any telephone terminal. The monitoring source telephone terminal that requested the monitoring of the status of the monitoring destination telephone terminal related to the monitoring destination telephone terminal to be monitored by the storage unit to the computer of the terminal status notification device that notifies other telephone terminals, and the monitoring destination A storage step for storing the terminal status indicating absence / absence cancellation of the telephone terminal as monitoring information, and the monitoring by the terminal status monitoring unit in response to reception of a setting message indicating absence / absence cancellation from the monitored telephone terminal A terminal state monitoring step of detecting the absence / absence release state of the destination telephone terminal and registering this terminal state in the monitoring information in association with the monitoring destination telephone terminal; The state notification unit confirms the monitoring source telephone terminal corresponding to the monitoring destination telephone terminal with the monitoring information in response to the detection of the absence of the monitoring destination telephone terminal by the terminal status monitoring unit, and sends the monitoring source telephone terminal to the monitoring source telephone terminal. In response to reception of an incoming message from an arbitrary telephone terminal to the monitoring destination telephone terminal in the absence state by the terminal state notification step for notifying the absence release of the monitoring destination telephone terminal and the call control unit, the calling side telephone terminal Is matched with the monitoring source telephone terminal of the monitoring destination telephone terminal by the monitoring information, and a call control step of notifying the monitoring destination telephone terminal of an incoming call is executed according to the match .

The call control server according to the present invention is a call control server that performs call control by connecting to a telephone terminal via a communication network and transmitting / receiving various control messages to / from the telephone terminal. A storage unit that stores, as monitoring information, a monitoring source telephone terminal that has requested monitoring of the status of the monitoring destination telephone terminal and a terminal status indicating absence / absence cancellation of the monitoring destination telephone terminal, In response to receiving a setting message indicating absence / absence cancellation from the monitoring destination telephone terminal, the absence / absence cancellation status of the monitoring destination telephone terminal is detected, and the terminal status is associated with the monitoring destination telephone terminal and monitored. When the terminal status monitoring unit registered in the information and the terminal status monitoring unit detect the absence of the monitoring destination telephone terminal, the monitoring source telephone terminal corresponding to the monitoring destination telephone terminal is confirmed with the monitoring information, A terminal state notifying unit which monitors the source telephone terminal notifies the absence releases the monitoring destination telephone terminal, in response to reception of the incoming messages from any telephone terminal for monitoring telephone terminals in the absence state, the calling side telephone terminal Is provided with a call control unit that confirms whether or not it matches the monitoring source telephone terminal of the monitoring destination telephone terminal by monitoring information and notifies the monitoring destination telephone terminal of an incoming call according to the match .

According to the present invention, the terminal status monitoring unit detects the absence / absence release status of the monitored telephone terminal in response to the reception of the setting message indicating the absence / absence cancellation from the monitored telephone terminal. The status is registered in the monitoring information in association with the monitoring destination telephone terminal, and the monitoring source corresponding to the monitoring destination telephone terminal is detected by the terminal status notification unit according to the detection of the absence of the monitoring destination telephone terminal by the terminal status monitoring unit The telephone terminal is confirmed by the monitoring information, the absence of the monitoring destination telephone terminal is notified to the monitoring source telephone terminal, and in response to receiving an incoming message from any telephone terminal for the monitoring destination telephone terminal in the absence state, Whether the caller side telephone terminal matches the monitoring source telephone terminal of the monitoring destination telephone terminal is confirmed by the monitoring information, and an incoming call is notified to the monitoring destination telephone terminal according to the match .

  As a result, the status of the telephone terminal is monitored by the terminal status notification device by monitoring registration from the telephone terminal with the telephone terminal being absent as the monitoring destination telephone terminal, and the telephone terminal is notified of the absence by the telephone terminal. You will be notified. Therefore, it is possible to easily confirm the absence of the telephone terminal with the telephone terminal, and it is not necessary to make another call even when the other party is absent, or to repeat the call periodically. The mental burden can be greatly reduced.

Next, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, with reference to FIG. 1, a terminal state notification device according to a first exemplary embodiment of the present invention will be described. FIG. 1 is a block diagram showing a configuration of a terminal state notification device according to the first exemplary embodiment of the present invention.

  This terminal status notification device 1 is composed of a call control device such as a call control server, and is connected to telephone terminals 2 and 3 via a telephone network (communication network) 5 and performs various controls between these telephone terminals 2 and 3. It has a function of notifying the monitoring source telephone terminal of the state of the monitored telephone terminal to be monitored by transmitting and receiving messages. In each embodiment of the present invention, for the sake of easy understanding, a case where the monitoring source telephone terminal is composed of the telephone terminal 2 and the monitoring destination telephone terminal to be monitored is composed of the telephone terminal 3 will be described as an example.

  In the present embodiment, the storage unit indicates the monitoring source telephone terminal that requested monitoring of the status of the monitoring destination telephone terminal and the absence / absence release of the monitoring destination telephone terminal regarding the monitoring destination telephone terminal that is the target of status monitoring. The terminal status is stored as monitoring information, and the terminal status monitoring unit detects the absence / absence release status of the monitoring destination telephone terminal upon receipt of a setting message indicating the absence / absence cancellation from the monitoring destination telephone terminal. The terminal status is registered in the monitoring information in association with the monitoring destination telephone terminal, and the terminal status notification unit detects the absence of the monitoring destination telephone terminal by the terminal status monitoring unit. The corresponding monitoring source telephone terminal is confirmed by the monitoring information, and the absence of the monitoring destination telephone terminal is notified to the monitoring source telephone terminal.

[Terminal status notification device (call control server)]
Next, with reference to FIG. 1, the configuration of the terminal state notification device according to the first exemplary embodiment of the present invention will be described in detail. The terminal status notification device according to the first exemplary embodiment of the present invention shows a case where the terminal status notification device is mounted on a general call control server used in an IP telephone system such as a SIP server. Hereinafter, the terminal state notification device according to the first embodiment is referred to as a call control server 1.

The call control server (terminal state notification device) 1 is provided with a communication interface unit (hereinafter referred to as a communication I / F unit) 11, a storage unit 12, and a control unit 13 as main functions.
The communication I / F unit 11 includes a dedicated data communication circuit and has a function of transmitting and receiving various control messages by performing data communication with the telephone terminals 2 and 3 via the telephone network 5.
The storage unit 12 includes a storage device such as a hard disk or a memory, and has a function of storing processing information and programs 12P used for various processes in the control unit 13. The program 12P is a program that realizes various processing units by being read and executed by the control unit 13, and is read in advance from a recording medium or an external device and stored in the storage unit 12.

  Main processing information stored in the storage unit 12 includes call control information 12A and monitoring information 12B. The call control information 12A is various information used for call control by the control unit 13, such as the telephone number and control state of the outgoing / incoming telephone terminal. The monitoring information 12 </ b> B is various information used for monitoring the telephone terminal by the control unit 13. FIG. 2 is a configuration example of monitoring information. Here, the monitoring destination telephone number that is the telephone number (identification information) of the monitoring destination telephone terminal to be monitored, the monitoring source telephone number that is the telephone number (identification information) of the monitoring source telephone terminal that requested monitoring, and the monitoring The monitoring destination telephone terminal status indicating the absence / absence release status of the destination telephone terminal is registered as a set.

The control unit 13 has a microprocessor such as a CPU and its peripheral circuits, and reads and executes the program 12P of the storage unit 12 to realize various processing units by cooperating the hardware and the program. have.
As main processing units realized by the control unit 13, there are a call control unit 13A, a monitoring request receiving unit 13B, a terminal state monitoring unit 13C, and a terminal state notification unit 13D.

The call control unit 13A sends and receives calls to the telephone terminals 2 and 3 by transmitting and receiving control messages to and from the telephone terminals 2 and 3 connected via the telephone network 5 via the communication I / F unit 11. It has a function to perform various call controls such as incoming calls and calls.
In response to receiving the monitoring registration request message from an arbitrary telephone terminal, the monitoring request receiving unit 13B associates the arbitrary telephone terminal with the designated monitoring destination telephone terminal as a monitoring source telephone terminal, and monitors the monitoring information in the storage unit 12 The registration of the monitoring source telephone terminal by the arbitrary telephone terminal for the designated monitoring destination telephone terminal is deleted from the monitoring information 12B in response to the function of registering to 12B and the reception of the monitoring cancellation request message from the arbitrary telephone terminal And a function of initially registering an entry related to an arbitrary telephone terminal in the monitoring information 12B in response to a status notification registration message from the arbitrary telephone terminal.

The terminal state monitoring unit 13C detects the absence / absence release state of the monitoring destination telephone terminal in response to the reception of the setting message indicating the absence / absence release from the monitoring destination telephone terminal, and the detected terminal state. A function of registering in the monitoring information 12B of the storage unit 12 in association with the monitoring destination telephone terminal.
The terminal status notifying unit 13D has a function of confirming the monitoring source telephone terminal corresponding to the monitoring destination telephone terminal with the monitoring information in response to the detection of the absence of the monitoring destination telephone terminal by the terminal status monitoring unit 13C, and the monitoring source A function of notifying the telephone terminal of the absence of the monitored telephone terminal.

[Monitoring phone terminal]
Next, the configuration of the monitoring source telephone terminal according to the first embodiment of the present invention will be described with reference to FIG. FIG. 3 is a block diagram showing the configuration of the monitoring source telephone terminal according to the first embodiment of the present invention.

The telephone terminal 2 that is a monitoring source telephone terminal includes, as main functional units, a communication interface unit (hereinafter referred to as a communication I / F unit) 21, a voice processing unit 22, a display unit 23, an operation input unit 24, and a storage unit 25. And a control unit 26 are provided.
The communication I / F unit 21 includes a dedicated data communication circuit, and transmits and receives various control messages and voice packets by performing data communication with the call control server 1 and the telephone terminal 3 via the telephone line 2A and the telephone network 5. It has a function.

  The voice processing unit 22 is composed of a dedicated signal processing circuit, and outputs a voice signal received by the communication I / F unit 21 and a voice signal obtained by the decoding from a speaker (not shown). A function, a function of encoding a voice signal input from a microphone (not shown), a function of outputting a voice packet obtained by this encoding to the communication I / F unit 21, and an instruction from the control unit 26 And a function of outputting various sound signals such as a ring tone from the speaker in response to the sound.

The display unit 23 is composed of a display device such as an LCD or an LED. In response to an instruction from the control unit 26, the state of the telephone terminal 2 such as an incoming call display or a monitoring mode indicating a monitoring request state of the telephone terminal 2 is displayed. In addition, it has a function of displaying various information such as the status of the monitoring destination telephone terminal received via the telephone network 5 and the telephone number of the other party telephone terminal.
The operation input unit 24 includes operation detection circuits such as operation keys and switches. The operation input unit 24 detects various operations by the user such as dial operation, transmission operation, response operation, monitoring request operation, and monitoring release operation, and outputs them to the control unit 26. It has a function to do.

  The storage unit 25 includes a storage device such as a memory and a hard disk, and has a function of storing processing information and programs 25P used for various processes in the control unit 26. The program 25P is a program that realizes various processing units by being read and executed by the control unit 26, and is read in advance from a recording medium or an external device and stored in the storage unit 25.

  Main processing information stored in the storage unit 25 includes call control information 25A and monitoring processing information 25B. The call control information 25 </ b> A is various information such as a control state of the telephone terminal 2 used for call control in the control unit 26. The monitoring process information 25B is information indicating the monitoring request status by the telephone terminal 2, that is, the status of monitoring mode setting (monitoring requested) / cancellation (monitoring not requested) and the telephone number of the monitoring destination telephone terminal. FIG. 4 is a configuration example of the monitoring process information. Here, monitoring mode information indicating monitoring mode setting / canceling and a monitoring destination telephone number are registered.

The control unit 26 includes a microprocessor such as a CPU and its peripheral circuits, and reads and executes the program 25P of the storage unit 25, thereby realizing various processing units in cooperation with the hardware and the program. have.
As main processing units realized by the control unit 26, there are a call control unit 26A and a monitoring processing unit 26B.

The call control unit 26A transmits and receives control messages to and from the call terminal 2 via the communication I / F unit 21 with the call control server 1 connected via the telephone network 5. And has a function of performing various call controls such as a telephone call.
The monitoring processing unit 26B sends a monitoring registration request message specifying a monitoring destination telephone terminal to be monitored in response to a monitoring mode setting operation using a monitoring mode setting key by the user detected by the operation input unit 24. A function for transmitting from the communication I / F unit 21 to the call control server 1 via the telephone network 5, and a monitoring mode setting and a monitoring destination telephone number in response to reception of a registration completion message returned in response to the monitoring registration request message Is registered in the monitoring processing information 25B of the storage unit 25.

  In addition to this, the monitoring processing unit 26B performs the monitoring cancellation specifying the monitoring destination telephone terminal to be monitored in response to the monitoring mode cancellation operation using the monitoring mode setting key or the like detected by the user by the operation input unit 24. The function of transmitting a request message from the communication I / F unit 21 to the call control server 1 via the telephone network 5 and the cancellation of the monitoring mode in response to the reception of the registration completion message returned in response to the monitoring cancellation request message It has a function of registering in the monitoring processing information 25B of the storage unit 25 and a function of displaying the monitoring mode state on the display unit 23.

[Monitoring phone terminal]
Next, the configuration of the monitoring destination telephone terminal according to the first embodiment of the present invention will be described with reference to FIG. FIG. 5 is a block diagram showing the configuration of the monitoring destination telephone terminal according to the first embodiment of the present invention.

The telephone terminal 3 that is a monitoring destination telephone terminal to be monitored includes a communication interface unit (hereinafter referred to as a communication I / F unit) 31, a voice processing unit 32, a display unit 33, and an operation input unit 34 as main functional units. A storage unit 35 and a control unit 36 are provided.
The communication I / F unit 31 includes a dedicated data communication circuit, and transmits and receives various control messages and voice packets by performing data communication with the call control server 1 and the telephone terminal 2 via the telephone line 3A and the telephone network 5. It has a function.

  The voice processing unit 32 is composed of a dedicated signal processing circuit, and outputs a voice signal obtained by the decoding and a voice signal received by the communication I / F unit 31 from a speaker (not shown). A function, a function of encoding a voice signal input from a microphone (not shown), a function of outputting a voice packet obtained by this encoding to the communication I / F unit 31, and an instruction from the control unit 36 And a function of outputting various sound signals such as a ring tone from the speaker in response to the sound.

The display unit 33 includes a display device such as an LCD or an LED, and in response to an instruction from the control unit 36, the state of the telephone terminal 3 such as an incoming call display and a monitoring mode indicating a monitoring request state of the telephone terminal 3 is displayed. And a function of displaying various information such as the telephone number of the other party telephone terminal received via the telephone network 5.
The operation input unit 34 includes operation detection circuits such as operation keys and switches. The operation input unit 34 detects various operations by the user such as dial operation, transmission operation, response operation, absence setting operation, and absence release operation, and outputs them to the control unit 36. It has a function to do.

  The storage unit 35 includes a storage device such as a memory and a hard disk, and has a function of storing processing information and programs 35P used for various processes in the control unit 36. The program 35P is a program that realizes various processing units by being read and executed by the control unit 36, and is read in advance from a recording medium or an external device and stored in the storage unit 35.

  Main processing information stored in the storage unit 35 includes call control information 35A and absence processing information 35B. The call control information 35 </ b> A is various information such as a control state of the telephone terminal 3 used for call control in the control unit 36. The absence processing information 35B is information indicating the setting state of the absence of the user in the telephone terminal 3, that is, the state of setting (absence) / cancellation (absence cancellation) of the absence mode. FIG. 6 is a configuration example of absence processing information. Here, the absent mode information indicating the setting / cancellation of the absent mode is registered.

The control unit 36 has a microprocessor such as a CPU and its peripheral circuits, and reads and executes the program 35P of the storage unit 35, thereby realizing various processing units in cooperation with the hardware and the program. have.
As main processing units realized by the control unit 36, there are a call control unit 36A and an absence processing unit 36B.

The call control unit 36A transmits and receives control messages to and from the telephone terminal 3 by transmitting and receiving control messages to and from the call control server 1 connected via the telephone network 5 via the communication I / F unit 31. And has a function of performing various call controls such as a telephone call.
The absence processing unit 36B sends an absence registration message indicating the absence of the user from the communication I / F unit 31 in response to the absence mode setting operation using the absence mode setting key by the user detected by the operation input unit 34. A function of transmitting to the call control server 1 via the telephone network 5 and a function of registering the absence mode setting in the absence processing information 35B of the storage unit 35 in response to the reception of the registration completion message returned in response to the absence registration message. And have.

  In addition to this, the absence processing unit 36B displays the absence release notification message indicating the presence or absence of the user in response to the absence mode release operation using the absence mode setting key or the like detected by the user by the operation input unit 34. Is sent from the communication I / F unit 31 to the call control server 1 via the telephone network 5, and the absence mode release is stored in response to the reception of the registration completion message returned in response to the absence release notification message. A function of registering in the 35 absence processing information 35B, and a function of displaying the state of the absence mode on the display unit 33.

[Operation of First Embodiment]
Next, the operation of the terminal state notification device according to the first exemplary embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a sequence diagram showing an initial registration operation and an absence registration operation in the terminal state notification device according to the first embodiment of the present invention. FIG. 8 is a sequence diagram illustrating a monitoring registration operation in the terminal state notification device according to the first embodiment of the present invention. FIG. 9 is a sequence diagram showing a terminal state notification operation in the terminal state notification device according to the first embodiment of the present invention. FIG. 10 is a sequence diagram illustrating a monitoring release operation in the terminal state notification device according to the first embodiment of the present invention.

[Initial registration operation]
First, an initial registration operation in the terminal state notification device (call control server) 1 according to the first embodiment of the present invention will be described with reference to FIG. Here, a case will be described as an example where the monitoring source telephone terminal is the telephone terminal 2 and the monitoring destination telephone terminal to be monitored is the telephone terminal 3.

In response to activation of the telephone terminal 3 or line connection (step 100), the control unit 36 of the telephone terminal 3 uses the absence processing unit 36B to send a status notification registration message indicating use of the terminal status notification function to the communication I / F unit. 31 to the call control server 1 via the telephone network 5 (step 101).
When receiving the status notification registration message from the telephone terminal 3 by the communication I / F unit 11, the control unit 13 of the call control server 1 receives the monitoring destination specified by the status notification registration message by the monitoring request reception unit 13 B. An entry relating to the telephone terminal 3 is initially registered in the monitoring information 12B of the storage unit 12 (step 102). After registration, the monitoring request receiving unit 13B returns a registration completion message from the communication I / F unit 11 to the telephone terminal 3 (step 103).

  Thereafter, when the control unit 36 of the telephone terminal 3 receives the registration completion message from the call control server 1 by the communication I / F unit 31, the absence processing unit 36 </ b> B sends an absence cancellation notification message indicating cancellation of user absence. Transmission is performed from the communication I / F unit 31 to the call control server 1 via the telephone network 5 (step 104).

  When the control unit 13 of the call control server 1 receives the absence cancellation notification message from the telephone terminal 3 by the communication I / F unit 11, the terminal state monitoring unit 13C detects the absence cancellation state of the telephone terminal 3, The absence cancellation state is associated with the telephone terminal 3 and registered in the monitoring information 12B of the storage unit 12 (step 105). After registration, the terminal state monitoring unit 13C returns the absence cancellation notification message from the communication I / F unit 11 to the telephone terminal 3 (step 106).

  When the absence processing unit 36B of the telephone terminal 3 receives the absence release notification message from the call control server 1 through the communication I / F unit 31, it registers the absence mode release in the absence processing information 35B of the storage unit 35 (step S31). 107) The absence mode release state is displayed on the display unit 33 (step 108), and the series of absence release operations is terminated. As a result, both the telephone terminal 3 and the call control server 1 are in the absence mode release state.

[Out of office operation]
Next, the absence registration operation in the terminal state notification device (call control server) 1 according to the first embodiment of the present invention will be described with reference to FIG.
When the absence input operation by the user is detected by the operation input unit 34 in the absence mode release state (step 110), the control unit 36 of the telephone terminal 3 displays the absence registration message indicating the absence of the user by the absence processing unit 36B. Is transmitted from the communication I / F unit 31 to the call control server 1 via the telephone network 5 (step 111).

  When the communication I / F unit 11 receives the absence registration message from the telephone terminal 3, the control unit 13 of the call control server 1 detects the absence state of the telephone terminal 3 by the terminal state monitoring unit 13C, and the absence The state is associated with the telephone terminal 3 and registered in the monitoring information 12B of the storage unit 12 (step 112). After registration, the terminal state monitoring unit 13C returns the absence registration notification message from the communication I / F unit 11 to the telephone terminal 3 (step 113).

  When the communication I / F unit 31 receives the registration completion message from the call control server 1, the absence processing unit 36B of the telephone terminal 3 registers the absence mode setting in the absence processing information 35B of the storage unit 35 (step 114). The absence mode setting state is displayed on the display unit 33 (step 115), and a series of absence registration operations are terminated. As a result, both the telephone terminal 3 and the call control server 1 are in the absence mode setting state.

[Monitoring registration operation]
Next, with reference to FIG. 8, the monitoring registration operation in the terminal state notification device (call control server) 1 according to the first embodiment of the present invention will be described.
When the operation input unit 24 detects a call operation to the telephone terminal 3 by the user (step 120), the control unit 26 of the telephone terminal 2 calls the telephone terminal 3 specified by the call operation by the call control unit 26A. Is transmitted from the communication I / F unit 21 to the call control server 1 via the telephone network 5 (step 121).

  When the communication I / F unit 11 receives the outgoing message from the telephone terminal 2, the control unit 13 of the call control server 1 refers to the monitoring information 12B of the storage unit 12 by the call control unit 13A, The terminal status of the designated telephone terminal 3 is confirmed. Here, when the absence registration is confirmed for the telephone terminal 3 (step 122), a busy message indicating that the telephone terminal 3 cannot respond is returned to the telephone terminal 2 (step 123).

When the communication I / F unit 21 receives a busy message from the call control server 1, the call control unit 26 </ b> A of the telephone terminal 2 outputs a busy tone (busy tone) from the speaker by the voice processing unit 22.
Thereafter, when a monitoring mode setting operation by the user is detected by the operation input unit 24 (step 124), the control unit 26 designates the telephone terminal 3 as a monitoring destination telephone terminal to be monitored by the monitoring processing unit 26B. A monitoring registration request message is transmitted from the communication I / F unit 21 to the call control server 1 via the telephone network 5 (step 125).

  When the control unit 13 of the call control server 1 receives the monitoring registration request message from the telephone terminal 2 by the communication I / F unit 11, the monitoring request receiving unit 13B specifies the monitoring destination specified by the monitoring registration request message. The telephone terminal 2 as the monitoring source is associated with the telephone terminal 3 and registered in the monitoring information 12B of the storage unit 12 (step 126). After registration, the monitoring request receiving unit 13B returns a registration completion message from the communication I / F unit 11 to the telephone terminal 2 (step 127).

  When the communication processing unit 21 receives the registration completion message from the call control server 1 via the communication I / F unit 21, the monitoring processing unit 26B of the telephone terminal 2 registers the monitoring mode setting in the monitoring processing information 25B of the storage unit 25 (step 128). ), The monitoring mode setting state is displayed on the display unit 23 (step 129), and the series of monitoring registration operations is terminated. As a result, both the telephone terminal 2 and the call control server 1 are in the monitoring mode setting state.

[Out of office release action]
Next, with reference to FIG. 9, the absence cancellation operation in the terminal state notification device (call control server) 1 according to the first embodiment of the present invention will be described.
When the absence input operation by the user is detected by the operation input unit 34 in the absence mode setting state (step 130), the control unit 36 of the telephone terminal 3 causes the absence processing unit 36B to cancel the absence. A notification message is transmitted from the communication I / F unit 31 to the call control server 1 via the telephone network 5 (step 131).

  When the control unit 13 of the call control server 1 receives the absence cancellation notification message from the telephone terminal 3 by the communication I / F unit 11, the terminal state monitoring unit 13C detects the absence cancellation state of the telephone terminal 3, The absence cancellation state is associated with the telephone terminal 3 and registered in the monitoring information 12B of the storage unit 12 (step 132). After registration, the terminal state monitoring unit 13C returns the absence release notification message from the communication I / F unit 11 to the telephone terminal 3 (step 133).

  When the absence processing unit 36B of the telephone terminal 3 receives the absence release notification message from the call control server 1 through the communication I / F unit 31, it registers the absence mode release in the absence processing information 35B of the storage unit 35 (step S31). 134) The absence mode release state is displayed on the display unit 33 (step 135), and the series of absence release operations is terminated. As a result, both the telephone terminal 3 and the call control server 1 are in the absence mode release state.

[Terminal status notification operation]
Next, with reference to FIG. 10, the terminal state notification operation in the terminal state notification device (call control server) 1 according to the first embodiment of the present invention will be described.
When the terminal state monitoring unit 13C detects the absence release state of the telephone terminal 3 in the monitoring mode setting state, the control unit 13 of the call control server 1 responds to the telephone terminal 3 by the terminal state notification unit 13D. The telephone terminal 2 to be monitored is confirmed by the monitoring information 12B of the storage unit 12, and an absence cancellation notification message indicating the absence cancellation at the telephone terminal 3 is transmitted from the communication I / F unit 11 via the telephone network 5. (Step 140).

  When the communication I / F unit 21 receives the absence cancellation notification message from the call control server 1, the control unit 26 of the telephone terminal 2 displays the absence cancellation state at the monitoring destination telephone terminal 3 by the monitoring processing unit 26B. The data is displayed on the unit 23 (step 141). Thereafter, when a call operation by the user is detected by the operation input unit 24 (step 142), the control unit 26 sends a call message to the telephone terminal 3 that has been released by the call control unit 26A as a call destination. Transmission is performed from the communication I / F unit 21 to the call control server 1 via the telephone network 5 (step 143).

  When the communication I / F unit 11 receives the outgoing message from the telephone terminal 2, the control unit 13 of the call control server 1 refers to the monitoring information 12B of the storage unit 12 by the call control unit 13A, The terminal state of a certain telephone terminal 3 is confirmed. Here, when the absence of the telephone terminal 3 is confirmed (step 144), an incoming message notifying the transmission from the telephone terminal 2 is transmitted from the communication I / F unit 11 to the telephone terminal 3 via the telephone network 5. (Step 145).

  When the communication I / F unit 31 receives an incoming message from the call control server 1, the control unit 36 of the telephone terminal 3 displays the incoming call from the telephone terminal 2 on the display unit 33 by the call control unit 36A ( Step 146). Thereafter, when a response operation by the user is detected by the operation input unit 34 (step 147), the control unit 36 sends a response message indicating a response to the incoming call from the communication I / F unit to the call control unit 36A. It returns to the control server 1 (step 148).

  In response to this, the response message is transferred to the telephone terminal 2 via the call control unit 13A of the call control server 1 (step 149) and negotiated between the telephone terminals 2 and 3 via the telephone network 5. After that, a telephone call is started between the telephone terminals 2 and 3 (step 150), and a series of terminal state notification operations and subsequent outgoing operations are completed.

[Release action]
Next, with reference to FIG. 10, the monitoring cancellation | release operation | movement in the terminal state notification apparatus (call control server) 1 concerning the 1st Embodiment of this invention is demonstrated.
When the monitoring mode release operation by the user is detected by the operation input unit 24 in the monitoring mode setting state (step 160), the control unit 26 of the telephone terminal 2 monitors the monitoring processing information stored in the storage unit 25 by the monitoring processing unit 26B. The monitoring terminal telephone terminal 3 is confirmed from 25B, and a monitoring cancellation request message designating the telephone terminal 3 is transmitted from the communication I / F unit 21 to the call control server 1 via the telephone network 5 (step 161).

  When the communication canceling request message from the telephone terminal 2 is received by the communication I / F unit 11, the control unit 13 of the call control server 1 receives the monitoring destination specified by the monitoring cancel request message by the monitoring request receiving unit 13B. The monitoring registration is canceled by deleting the registration of the monitoring source telephone terminal 2 with respect to the telephone terminal 3 from the monitoring information 12B of the storage unit 12 (step 162). After canceling the registration, the monitoring request receiving unit 13B returns a monitoring cancellation notification message from the communication I / F unit 11 to the telephone terminal 2 (step 163).

  When the monitoring processing unit 26B of the telephone terminal 2 receives the monitoring cancellation notification message from the call control server 1 by the communication I / F unit 21, it registers the monitoring mode cancellation in the monitoring processing information 25B of the storage unit 25 (step 164) The monitor mode release state is displayed on the display unit 23 (step 165), and the series of monitor release operations is terminated. Thereby, both the telephone terminal 2 and the call control server 1 are in the monitoring mode release state.

[Effect of the first embodiment]
As described above, according to the present embodiment, in the terminal status notification device (call control server) 1, the terminal status monitoring unit 13C receives the setting message indicating the absence / absence release from the monitored telephone terminal 3, The absence / absence release state of the monitoring destination telephone terminal 3 is detected, the terminal state is registered in the monitoring information 12B in association with the monitoring destination telephone terminal 3, and the terminal state notification unit 13D causes the terminal state monitoring unit 13C to In response to the detection of the absence of the monitoring destination telephone terminal 3, the monitoring source telephone terminal 2 corresponding to the monitoring destination telephone terminal 3 is confirmed with the monitoring information, and the monitoring destination telephone terminal 2 is not present. The release is notified.

  As a result, the status of the telephone terminal 3 is monitored by the terminal status notification device (call control server) 1 by monitoring registration from the telephone terminal 2 with the telephone terminal 3 being absent as the monitoring destination telephone terminal. In response to the absence cancellation, the telephone terminal 2 is notified of this. Accordingly, it is possible to easily confirm the absence of the telephone terminal 3 on the telephone terminal 2, and there is no need to make another call even when the other party is absent, or to repeat the call periodically. Operation and mental burden can be greatly reduced.

  In the present embodiment, since the terminal status notification device (call control server) 1 is implemented in the terminal status notification device (call control server) 1, the absence status of a plurality of telephone terminals can be managed collectively. Further, it is not necessary to install advanced functions for the telephone terminal, and a terminal state monitoring service can be realized without increasing the processing load on the telephone terminal.

  Further, in the present embodiment, in response to reception of a monitoring registration request message from an arbitrary telephone terminal by the monitoring request receiving unit 13B, the arbitrary telephone terminal is designated as the monitoring source telephone terminal for the designated monitoring destination telephone terminal. Since the information is associated and registered in the monitoring information, the state monitoring of the desired telephone terminal from any telephone terminal can be easily registered.

[Second Embodiment]
Next, with reference to FIG. 11, a terminal state notification device according to a second exemplary embodiment of the present invention will be described. FIG. 11 is a configuration example of monitoring information used in the terminal state notification device according to the second embodiment of the present invention.
In the first embodiment, a case will be described in which a call control server (terminal state notifying device) 1 notifies the monitoring origin telephone terminal 2 of the absence cancellation in response to the absence cancellation of the telephone terminal 3 as a monitoring destination. did. In the present embodiment, the call control server (terminal status notification device) 1 calls the monitoring source telephone terminal 2 monitored and registered for the telephone terminal 3 in response to the absence of the telephone terminal 3 that is the monitoring destination. A case of notifying the terminal 3 will be described.

The call control server (terminal state notification device) 1 according to the present embodiment has the following configuration in addition to the configuration of the first embodiment.
In response to reception of the monitoring source notification setting message from an arbitrary telephone terminal, the monitoring request reception unit 13B associates the monitoring source notification with the monitoring source telephone terminal including the arbitrary telephone terminal, and monitors the storage unit 12 It has a function of registering in the information 12B.
The terminal status notification unit 13D confirms whether or not the monitoring source notification corresponding to the monitoring destination telephone terminal is necessary by the monitoring information 12B of the storage unit 12 in response to the detection of the absence of the monitoring destination telephone terminal by the terminal status monitoring unit 13C. A function to confirm the monitoring source telephone terminal corresponding to the monitoring destination telephone terminal with the monitoring information 12B of the storage unit 12 in response to the confirmation of the monitoring source notification necessity, and the monitoring source telephone terminal as the monitoring source. And a function of notifying the monitoring destination telephone terminal of the fact.

In the configuration example of the monitoring information in FIG. 11, in addition to the monitoring destination telephone number, the monitoring source telephone number, and the monitoring destination telephone terminal status, the monitoring source notification necessity indicating whether the monitoring destination telephone terminal needs to be notified to the monitoring destination telephone terminal. Is registered as a set.
The configuration other than the above regarding the call control server (terminal state notification device) 1 according to the present embodiment is the same as that of the first embodiment, and detailed description thereof is omitted here.

[Operation of Second Embodiment]
Next, with reference to FIG. 12 and FIG. 13, the operation of the terminal state notification device according to the second exemplary embodiment of the present invention will be described. FIG. 12 is a sequence diagram showing the absence registration operation and the monitoring source notification setting operation in the terminal state notification device according to the second embodiment of the present invention. The same or equivalent parts as those in FIG. Is attached. FIG. 13 is a sequence diagram illustrating the absence release operation and the monitoring source notification operation in the terminal state notification device according to the second embodiment of the present invention.

[Out of office operation]
First, the absence registration operation in the terminal state notification device (call control server) 1 according to the second embodiment of the present invention will be described with reference to FIG. Here, a case will be described as an example where the monitoring source telephone terminal is the telephone terminal 2 and the monitoring destination telephone terminal to be monitored is the telephone terminal 3.

  When the absence input operation by the user is detected by the operation input unit 34 in the absence mode release state (step 110), the control unit 36 of the telephone terminal 3 displays the absence registration message indicating the absence of the user by the absence processing unit 36B. Is transmitted from the communication I / F unit 31 to the call control server 1 via the telephone network 5 (step 111).

  When the communication I / F unit 11 receives the absence registration message from the telephone terminal 3, the control unit 13 of the call control server 1 detects the absence state of the telephone terminal 3 by the terminal state monitoring unit 13C, and the absence The state is associated with the telephone terminal 3 and registered in the monitoring information 12B of the storage unit 12 (step 112). After registration, the terminal state monitoring unit 13C returns the absence registration notification message from the communication I / F unit 11 to the telephone terminal 3 (step 113).

  When the absence processing unit 36B of the telephone terminal 3 receives the absence registration notification message from the call control server 1 through the communication I / F unit 31, it registers the absence mode setting in the absence processing information 35B of the storage unit 35 (step 114) The absence mode setting state is displayed on the display unit 33 (step 115), and the series of absence registration operations is terminated. As a result, both the telephone terminal 3 and the call control server 1 are in the absence mode setting state.

[Monitoring source notification setting operation]
Next, a monitoring source notification setting operation in the terminal state notification device (call control server) 1 according to the second embodiment of the present invention will be described with reference to FIG.
The control unit 36 of the telephone terminal 3 performs call control from the communication I / F unit 31 via the telephone network 5 by using the absence processing unit 36B after the absence registration operation is completed. It transmits to the server 1 (step 200).

  When the control unit 13 of the call control server 1 receives the monitoring source notification setting message from the telephone terminal 3 by the communication I / F unit 11, the control request receiving unit 13 </ b> B sends the monitoring source telephone terminal 3 to the monitoring source telephone terminal. Then, the monitoring source notification requirement is associated and registered in the monitoring information 12B of the storage unit 12 (step 201). After registration, the monitoring request reception unit 13B returns a notification registration notification message from the communication I / F unit 11 to the telephone terminal 3 (step 202).

  When the absence processing unit 36B of the telephone terminal 3 receives the notification registration notification message from the call control server 1 by the communication I / F unit 31, it registers the monitoring source notification mode setting in the absence processing information 35B of the storage unit 35. (Step 203) The monitoring source notification mode setting state is displayed on the display unit 33 (Step 204), and the series of monitoring source notification setting operations is terminated. As a result, both the telephone terminal 3 and the call control server 1 are in the monitoring source notification mode setting state.

[Out of office release operation and monitoring source notification operation]
Next, with reference to FIG. 13, the absence cancellation operation and the monitoring source notification operation in the terminal state notification device (call control server) 1 according to the second embodiment of the present invention will be described.
When the absence input operation by the user is detected by the operation input unit 34 in the absence mode setting state (step 210), the control unit 36 of the telephone terminal 3 causes the absence processing unit 36B to cancel the absence. A notification message is transmitted from the communication I / F unit 31 to the call control server 1 via the telephone network 5 (step 211).

  When the control unit 13 of the call control server 1 receives the absence cancellation notification message from the telephone terminal 3 by the communication I / F unit 11, the terminal state monitoring unit 13C detects the absence cancellation state of the telephone terminal 3, The absence cancellation state is associated with the telephone terminal 3 and registered in the monitoring information 12B of the storage unit 12 (step 212). After registration, the terminal state monitoring unit 13C returns the absence release notification message from the communication I / F unit 11 to the telephone terminal 3 (step 213).

  When the absence processing unit 36B of the telephone terminal 3 receives the absence release notification message from the call control server 1 through the communication I / F unit 31, it registers the absence mode release in the absence processing information 35B of the storage unit 35 (step S31). 214) The absence mode release state is displayed on the display unit 33 (step 215). As a result, both the telephone terminal 3 and the call control server 1 are in the absence mode release state.

  On the other hand, after detecting the absence release state of the telephone terminal 3 by the terminal state monitoring unit 13C, the control unit 13 of the call control server 1 uses the terminal state notification unit 13D to send a monitoring source notification corresponding to the telephone terminal 3 that is the monitoring destination. Necessity is confirmed by the monitoring information 12B of the storage unit 12 (step 220), and the monitoring source telephone terminal 2 corresponding to the monitoring destination telephone terminal 3 is stored in the storage unit 12 according to the confirmation of the monitoring source notification necessity. The monitoring information 12B is confirmed (step 221), and a monitoring source notification message indicating the telephone number of the telephone terminal 2 is transmitted from the communication I / F unit 11 to the telephone terminal 3 (step 222). Further, the terminal state notification unit 13D registers the necessity of the monitoring source notification corresponding to the telephone terminal 3 in the monitoring information 12B of the storage unit 12 (step 223).

  When the absence processing unit 36B of the telephone terminal 3 receives the monitoring source notification message from the call control server 1 by the communication I / F unit 31, it registers the release of the monitoring source notification mode in the absence processing information 35B of the storage unit 35. (Step 224), the telephone number of the monitoring source telephone terminal 2 notified by the monitoring source notification message is displayed on the display unit 33 (Step 225), and the series of absence cancellation operation and monitoring source notification operation are terminated. As a result, both the telephone terminal 3 and the call control server 1 enter the monitoring source notification mode release state.

[Effect of the second embodiment]
Thus, in the present embodiment, in the terminal state notification device (call control server) 1, the terminal state notification unit 13D detects the absence of the monitored telephone terminal 3 by the terminal state monitoring unit 13C. Since the monitoring source telephone terminal 2 corresponding to the monitoring destination telephone terminal 3 is confirmed by the monitoring information 12B in the storage unit 12, the monitoring destination telephone terminal 3 is notified that the monitoring source telephone terminal 2 is the monitoring source. Thus, the user of the telephone terminal 3 whose absence has been canceled can easily grasp that there was an incoming call when he / she was absent and that it is necessary to contact the caller.

[Third Embodiment]
Next, a terminal state notification device according to a third embodiment of the present invention will be described.
In the first embodiment, when the absence of the telephone terminal 3 is registered, the call control server (terminal state notification device) 1 sends a busy message to the telephone terminal in response to a call from the telephone terminal 2 to the telephone terminal 3. The case of transmitting to 2 has been described. In the present embodiment, a description will be given of a case where an incoming call is notified to the monitoring destination telephone terminal 3 when a call is made from the monitoring terminal telephone 2 to the telephone terminal 3 registered as the monitoring destination. .

The call control server (terminal state notification device) 1 according to the present embodiment has the following configuration in addition to the configuration of the first embodiment.
The call control unit 13A monitors whether the caller telephone terminal matches the monitoring source telephone terminal of the monitoring destination telephone terminal in response to reception of an incoming message from any telephone terminal to the monitoring destination telephone terminal in the absence state. And a function of notifying the monitoring destination telephone terminal of an incoming call according to the match.
The configuration other than the above regarding the call control server (terminal state notification device) 1 according to the present embodiment is the same as that of the first embodiment, and detailed description thereof is omitted here.

[Operation of Third Embodiment]
Next, with reference to FIG. 14, the operation of the terminal state notification device according to the third exemplary embodiment of the present invention will be described. FIG. 14 is a sequence diagram showing a missed call operation in the terminal state notification device according to the third embodiment of the present invention.

[Missed calls]
When the operation input unit 24 detects the user's call operation to the phone terminal 3 (step 300), the control unit 26 of the phone terminal 2 calls the phone terminal 3 designated by the call operation by the call control unit 26A. Is transmitted from the communication I / F unit 21 to the call control server 1 via the telephone network 5 (step 301).

  When the communication I / F unit 11 receives the outgoing message from the telephone terminal 2, the control unit 13 of the call control server 1 refers to the monitoring information 12B of the storage unit 12 by the call control unit 13A, The terminal status of the designated telephone terminal 3 is confirmed. Here, when the absence registration is confirmed for the telephone terminal 3 (step 302), it is confirmed by the monitoring information 12B whether the originating telephone terminal 2 matches the monitoring source telephone terminal of the monitoring destination telephone terminal 3 (step 303). In response to the confirmation of the match, the call control unit 13A transmits an incoming message notifying the transmission from the telephone terminal 2 from the communication I / F unit 11 to the telephone terminal 3 via the telephone network 5 (step 304). .

  When the communication I / F unit 31 receives an incoming message from the call control server 1, the control unit 36 of the telephone terminal 3 displays the incoming call from the telephone terminal 2 on the display unit 33 by the call control unit 36A ( Step 305). Thereafter, when a response operation by the user is detected by the operation input unit 34 (step 306), the control unit 36 sends a response message indicating a response to the incoming call from the communication I / F unit to the call control unit 36A. It returns to the control server 1 (step 307). Further, the control unit 36 of the telephone terminal 3 registers the absence mode cancellation in the absence processing information 35B of the storage unit 35 by the absence processing unit 36B (step 308), and displays the absence mode cancellation state on the display unit 33 ( Step 309).

When the communication I / F unit 11 receives a response message from the telephone terminal 3, the control unit 13 of the call control server 1 detects the absence cancellation state of the telephone terminal 3 by the terminal state monitoring unit 13C, and the absence The release state is associated with the telephone terminal 3 and registered in the monitoring information 12B of the storage unit 12 (step 310). As a result, both the telephone terminal 3 and the call control server 1 are in the absence mode release state.
Further, the control unit 13 of the call control server 1 transfers the response message from the telephone terminal 3 to the telephone terminal 2 by the call control unit 13A (step 311). As a result, after negotiation is performed between the telephone terminals 2 and 3 via the telephone network 5, a telephone call is started between the telephone terminals 2 and 3 (step 312).

  In response to the reception of the response message, the control unit 13 of the call control server 1 deletes the entry of the monitoring source telephone terminal 2 for the telephone terminal 3 from the monitoring information 12B of the storage unit 12 by the monitoring request reception unit 13B. Thus, the monitoring registration is canceled (step 320), and after the registration is canceled, the communication I / F unit 11 returns a monitoring cancellation notification message to the telephone terminal 2 (step 321).

  When the monitoring processing unit 26B of the telephone terminal 2 receives the monitoring cancellation notification message from the call control server 1 by the communication I / F unit 21, it registers the monitoring mode cancellation in the monitoring processing information 25B of the storage unit 25 (step 322) The monitoring mode release state is displayed on the display unit 23 (step 323), and the series of missed call operations is terminated. Thereby, both the telephone terminal 2 and the call control server 1 are in the monitoring mode release state.

[Effect of the third embodiment]
As described above, according to the present embodiment, in the terminal state notification device (call control server) 1, the call control unit 13A responds to reception of an incoming message from any telephone terminal with respect to the monitored telephone terminal 3 in the absence state. Thus, it is confirmed in the monitoring information 12B of the storage unit 12 whether the calling telephone terminal matches the monitoring source telephone terminal 2 of the monitoring destination telephone terminal 3, and an incoming call is notified to the monitoring destination telephone terminal 3 according to the match. Therefore, even when the user of the telephone terminal 3 set as absent has forgotten the absence canceling operation, the telephone terminal 3 can be notified of an incoming call in response to a re-call from the monitoring source telephone terminal 2.

[Fourth Embodiment]
Next, with reference to FIG. 15, the terminal state notification apparatus according to the fourth exemplary embodiment of the present invention will be described. FIG. 15 is a configuration example of monitoring information used in the terminal state notification device according to the fourth exemplary embodiment of the present invention, and the same or equivalent parts as those in FIGS. 1 and 5 are denoted by the same reference numerals.
In the first to third embodiments, the case where the terminal state notification device is realized by the call control server of the IP telephone system has been described as an example. In the present embodiment, a case will be described as an example where the terminal state notification device is mounted on a telephone terminal that is a monitoring destination in the IP telephone system. The call control server 10 is a general known call control server such as a SIP server.

A telephone terminal (terminal status notification device) 30 that is a monitoring destination telephone terminal includes, as main functional units, a communication interface unit (hereinafter referred to as a communication I / F unit) 31, a voice processing unit 32, a display unit 33, and an operation input. A unit 34, a storage unit 35, and a control unit 36 are provided.
The communication I / F unit 31 includes a dedicated data communication circuit, and has a function of transmitting and receiving various control messages and voice packets by performing data communication with the call control server 10 and the telephone terminal 2 via the telephone network 5. ing.

  The voice processing unit 32 is composed of a dedicated signal processing circuit, and outputs a voice signal obtained by the decoding and a voice signal received by the communication I / F unit 31 from a speaker (not shown). A function, a function of encoding a voice signal input from a microphone (not shown), a function of outputting a voice packet obtained by this encoding to the communication I / F unit 31, and an instruction from the control unit 36 And a function of outputting various sound signals such as a ring tone from the speaker in response to the sound.

The display unit 33 includes a display device such as an LCD or an LED, and in response to an instruction from the control unit 36, the state of the telephone terminal 3 such as an incoming call display and a monitoring mode indicating a monitoring request state of the telephone terminal 3 is displayed. And a function of displaying various information such as the telephone number of the other party telephone terminal received via the telephone network 5.
The operation input unit 34 includes operation detection circuits such as operation keys and switches. The operation input unit 34 detects various operations by the user such as dial operation, transmission operation, response operation, absence setting operation, and absence release operation, and outputs them to the control unit 36. It has a function to do.

  The storage unit 35 includes a storage device such as a memory and a hard disk, and has a function of storing processing information and programs 35P used for various processes in the control unit 36. The program 35P is a program that realizes various processing units by being read and executed by the control unit 36, and is read in advance from a recording medium or an external device and stored in the storage unit 35.

Main processing information stored in the storage unit 35 includes call control information 35A, absence processing information 35B, and monitoring information 35C.
The call control information 35 </ b> A is various information such as a control state of the telephone terminal 3 used for call control in the control unit 36. The absence processing information 35B is information indicating the setting state of the absence of the user in the telephone terminal 3, that is, the state of setting (absence) / cancellation (absence cancellation) of the absence mode, and as shown in FIG. Absent mode information indicating mode setting / cancellation is registered.

  The monitoring information 35C is various information used for monitoring the telephone terminal in the control unit 36. As shown in FIG. 2, the monitoring destination telephone which is the telephone number (identification information) of the monitoring destination telephone terminal to be monitored. The number, the monitoring source telephone number that is the telephone number (identification information) of the monitoring source telephone terminal that requested monitoring, and the monitoring destination telephone terminal status indicating the absence / absence release status of the monitoring destination telephone terminal are registered as a set. ing.

The control unit 36 has a microprocessor such as a CPU and its peripheral circuits, and reads and executes the program 35P of the storage unit 35, thereby realizing various processing units in cooperation with the hardware and the program. have.
As main processing units realized by the control unit 36, there are a call control unit 36A, an absence processing unit 36B, a monitoring request receiving unit 36C, a terminal state monitoring unit 36D, and a terminal state notification unit 36E.

The call control unit 36A transmits and receives control messages to and from the telephone terminal 3 by transmitting and receiving control messages to and from the call control server 10 connected via the telephone network 5 via the communication I / F unit 31. And has a function of performing various call controls such as a telephone call.
The absence processing unit 36B has a function of registering the absence mode setting in the absence processing information 35B of the storage unit 35 in response to the absence mode setting operation using the absence mode setting key or the like detected by the user by the operation input unit 34. A function of registering the absence mode cancellation indicating the presence or absence of the user in the absence processing information 35B in response to the absence mode cancellation operation using the absence mode setting key by the user detected by the operation input unit 34; And the function of displaying the state of the absent mode on the display unit 33.

  The monitoring request receiving unit 36C, in response to receiving a monitoring registration request message from any telephone terminal, associates the requesting telephone terminal as a monitoring source telephone terminal and registers it in the monitoring information 35C of the storage unit 35; In response to reception of a monitoring cancellation request message from an arbitrary telephone terminal, a function of deleting the registration of the monitoring source telephone terminal by the requesting telephone terminal from the monitoring information 35C, and depending on the activation of the telephone terminal or line connection A function of initially registering an entry related to the telephone terminal 30 in the monitoring information 35C.

The terminal state monitoring unit 36D has a function of registering the absence / absence release state of the telephone terminal 30 detected by the absence processing unit 36B in the monitoring information 35C of the storage unit 35.
The terminal status notification unit 36E has a function of confirming a monitoring source telephone terminal corresponding to the telephone terminal 30 with monitoring information in response to detection of the absence release of the telephone terminal 30 by the absence processing unit 36B, and the monitoring source telephone terminal A function of notifying the absence of the telephone terminal 30.

[Operation of Fourth Embodiment]
Next, with reference to FIGS. 16-19, operation | movement of the terminal state notification apparatus concerning the 4th Embodiment of this invention is demonstrated. FIG. 16 is a sequence diagram illustrating an initial registration operation and an absence registration operation in the terminal state notification device according to the fourth embodiment of the present invention. FIG. 17 is a sequence diagram illustrating a monitoring registration operation in the terminal state notification device according to the fourth embodiment of the present invention. FIG. 18 is a sequence diagram illustrating the absence release operation and the terminal state notification operation in the terminal state notification device according to the fourth embodiment of the present invention. FIG. 19 is a sequence diagram illustrating a monitoring release operation in the terminal state notification device according to the fourth embodiment of the present invention.

[Initial registration operation and absence registration operation]
First, with reference to FIG. 16, the initial registration operation and the absence registration operation in the terminal state notification device (telephone terminal) 30 according to the fourth embodiment of the present invention will be described. Here, a case will be described as an example where the monitoring source telephone terminal is the telephone terminal 2 and the monitoring destination telephone terminal to be monitored is the telephone terminal 30.

  In response to activation of the telephone terminal 30 or line connection (step 400), the control unit 36 of the telephone terminal 30 notifies the monitoring request reception unit 36C of the use of the terminal state notification function by the absence processing unit 36B. In response to this, the monitoring request receiving unit 36C performs initial registration in the monitoring information 35C of the storage unit 35 related to the telephone terminal 30 (step 401). After registration, the absence processing unit 36B notifies the terminal state monitoring unit 36D of user absence cancellation. In response to this, the terminal state monitoring unit 36D registers the absence cancellation state in the monitoring information 35C in association with the telephone terminal 3 (step 402).

  Thereafter, the absence processing unit 36B registers the absence mode cancellation in the absence processing information 35B of the storage unit 35 (step 403), and displays the absence mode cancellation state on the display unit 33 (step 404), and a series of absence cancellations. End the operation. As a result, the telephone terminal 30 enters the absence mode release state.

[Out of office operation]
Next, with reference to FIG. 16, the absence registration operation in the terminal state notification device (telephone terminal) 30 according to the fourth embodiment of the present invention will be described.
When the absence setting operation by the user is detected by the operation input unit 34 (step 410), the control unit 36 of the telephone terminal 30 detects the absence state of the user by the absence processing unit 36B and sets the absence mode setting. While registering in the absence processing information 35B of the storage unit 35 (step 411), the absence mode setting state is displayed on the display unit 33 (step 412). Further, the control unit 36 registers the absence state of the telephone terminal 30 detected by the absence processing unit 36B in the monitoring information 35C of the storage unit 35 by the terminal state monitoring unit 36D (step 413), and a series of absence registration operations. Exit. As a result, the telephone terminal 3 enters the absence mode setting state.

[Monitoring registration operation]
Next, with reference to FIG. 17, the monitoring and registration operation in the terminal state notification device (telephone terminal) 30 according to the fourth embodiment of the present invention will be described.
When the operation input unit 24 detects the user's call operation to the telephone terminal 30 (step 420), the control unit 26 of the telephone terminal 2 calls the telephone terminal 30 specified by the call control unit 26A. Is transmitted from the communication I / F unit 21 to the call control server 10 via the telephone network 5 (step 421). This outgoing message is received by the call control server 10 and transferred as an incoming message to the telephone terminal 30 via the telephone network 5 (step 422).

  When the communication I / F unit 31 receives an incoming message from the call control server 10, the control unit 36 of the telephone terminal 30 refers to the monitoring information 35C in the storage unit 35 by the call control unit 36A and refers to the telephone terminal 30. Check the terminal status of. When the absence registration is confirmed for the telephone terminal 30 (step 423), a busy message indicating that the telephone terminal 30 is in a state where it cannot respond is returned to the call control server 10 (step 424). In response to this, a busy message is transferred from the call control server 10 to the telephone terminal 2 (step 425).

When the call control unit 26A of the telephone terminal 2 receives a busy message from the call control server 10 by the communication I / F unit 21, the voice processing unit 22 outputs a busy tone (busy tone) from the speaker.
Thereafter, when a monitoring mode setting operation by the user is detected by the operation input unit 24 (step 426), the control unit 26 designates the telephone terminal 30 as a monitoring destination telephone terminal to be monitored by the monitoring processing unit 26B. A monitoring registration request message is transmitted from the communication I / F unit 21 to the telephone terminal 30 via the telephone network 5 (step 427).

  When the communication I / F unit 31 receives the monitoring registration request message from the telephone terminal 2, the control unit 36 of the telephone terminal 30 receives the monitoring source telephone designated by the monitoring registration request message by the monitoring request receiving unit 36C. The terminal 3 is registered in the monitoring information 35C in the storage unit 35 (step 428). After registration, the monitoring request reception unit 36C returns a registration completion message from the communication I / F unit 31 to the telephone terminal 2 (step 429).

  When the communication processing unit 21 receives the registration completion message from the telephone terminal 30 by the communication I / F unit 21, the monitoring processing unit 26B of the telephone terminal 2 registers the monitoring mode setting in the monitoring processing information 25B of the storage unit 25 (step 430). The monitoring mode setting state is displayed on the display unit 23 (step 431), and the series of monitoring registration operations is terminated. As a result, both the telephone terminal 30 and the telephone terminal 2 are in the monitoring mode setting state.

[Terminal status notification operation]
Next, with reference to FIG. 18, the absence release operation and the terminal state notification operation in the terminal state notification device (telephone terminal) 30 according to the fourth embodiment of the present invention will be described.
When the absence input operation by the user is detected by the operation input unit 34 in the absence mode setting state (step 430), the control unit 36 of the telephone terminal 30 detects the absence release state of the user by the absence processing unit 36B. Then, the absence mode cancellation is registered in the absence processing information 35B of the storage unit 35 (step 431), and the absence mode setting state is displayed on the display unit 33 (step 432).

Further, the control unit 36 registers the absence release state of the telephone terminal 30 detected by the absence processing unit 36B in the monitoring information 35C of the storage unit 35 by the terminal state monitoring unit 36D (step 433). As a result, the telephone terminal 30 enters the absence mode release state.
Thereafter, the terminal state monitoring unit 36D transmits an absence cancellation notification message indicating the absence cancellation state of the telephone terminal 30 from the communication I / F unit 31 to the telephone terminal 2 via the telephone network 5 (step 434).

  When the call control unit 26A of the telephone terminal 2 receives the absence cancellation notification message from the telephone terminal 30 by the communication I / F unit 21, the monitoring processing unit 26B displays the absence cancellation state at the monitoring destination telephone terminal 30. This is displayed on the unit 23 (step 435), and a series of terminal state notification operations are terminated.

  Thereafter, when a call operation by the user is detected by the operation input unit 24 (step 440), the control unit 26 sends a call message with the telephone terminal 30 released from the absence by the call control unit 26A as a call destination. Transmission is performed from the communication I / F unit 21 to the call control server 10 via the telephone network 5 (step 441). This outgoing message is received by the call control server 10 and transferred as an incoming message to the telephone terminal 30 via the telephone network 5 (step 442).

  When the communication I / F unit 31 receives an incoming message from the call control server 10, the control unit 36 of the telephone terminal 30 refers to the monitoring information 35C in the storage unit 35 by the call control unit 36A and refers to the telephone terminal 30. Check the terminal status of. Here, when the absence of the telephone terminal 30 is confirmed (step 443), the call control unit 36A displays the incoming call from the telephone terminal 2 on the display unit 33 (step 444). Thereafter, when a response operation by the user is detected by the operation input unit 34 (step 445), the control unit 36 sends a response message indicating a response to the incoming call from the communication I / F unit by the call control unit 36A. It returns to the control server 10 (step 446).

  In response to this, the response message is transferred to the telephone terminal 2 via the call control server 10 (step 447), and after the negotiation between the telephone terminals 2 and 30 via the telephone network 5, the telephone terminal A call is started between 2 and 30 (step 448), and a series of terminal state notification operations and subsequent transmission operations are completed.

[Release action]
Next, with reference to FIG. 19, the monitoring cancellation | release operation | movement in the terminal state notification apparatus (telephone terminal) 30 concerning the 4th Embodiment of this invention is demonstrated.
When the monitoring mode canceling operation by the user is detected by the operation input unit 24 in the monitoring mode setting state (step 460), the control unit 26 of the telephone terminal 2 monitors the monitoring processing information in the storage unit 25 by the monitoring processing unit 26B. The monitoring destination telephone terminal is confirmed from 25B, and a monitoring cancellation request message designating the telephone terminal 30 is transmitted from the communication I / F unit 21 to the telephone terminal 30 via the telephone network 5 (step 461).

  When the communication canceling request message from the telephone terminal 2 is received by the communication I / F unit 31, the control unit 36 of the telephone terminal 30 is monitored by the monitoring request receiving unit 36 </ b> C and specified by the monitoring cancel request message 2 is deleted from the monitoring information 35C in the storage unit 35 to cancel the monitoring registration (step 462). After canceling the registration, the monitoring request receiving unit 36C returns a cancellation completion message from the communication I / F unit 31 to the telephone terminal 2 (step 463).

  When the communication I / F unit 21 receives the cancellation completion from the telephone terminal 30, the monitoring processing unit 26B of the telephone terminal 2 registers the monitoring mode cancellation in the monitoring processing information 25B of the storage unit 25 (step 464). The monitoring mode release state is displayed on the display unit 23 (step 465), and the series of monitoring release operations is terminated. As a result, both the telephone terminal 30 and the telephone terminal 2 are in the monitoring mode release state.

[Effect of the fourth embodiment]
As described above, in the present embodiment, in the telephone terminal 30, the monitoring request receiving unit 36C receives the monitoring registration request message from the telephone terminal 2 and uses the telephone terminal 2 as the monitoring source telephone terminal in the storage unit 35. The terminal status monitoring unit 36D detects the absence / absence release status of the telephone terminal 30 in response to an operation indicating absence / absence cancellation, and registers the terminal status in the monitoring information 35C. The terminal state notification unit 36E confirms the monitoring source telephone terminal 2 with the monitoring information 35E in response to the detection of the absence of the telephone terminal 30 by the terminal state monitoring unit 36D, and sends the monitoring terminal telephone terminal 2 to the monitoring source telephone terminal 2 This is a notification of absence cancellation.

  Thereby, by the monitoring registration from the telephone terminal 2, the state of the telephone terminal 30 is monitored by the terminal state notification device (telephone terminal) 30 serving as the monitoring destination telephone terminal, and in response to the absence cancellation at the telephone terminal 30, That is notified to the telephone terminal 2. Accordingly, the absence of the telephone terminal 30 can be easily confirmed by the telephone terminal 2, and it is not necessary to make another call even when the other party is absent, or to repeat the call periodically. Operation and mental burden can be greatly reduced.

  In the present embodiment, since the terminal state notification device is mounted on the telephone terminal 30, the absence state managed by the telephone terminal 30 can be directly notified from the telephone terminal 30 to the monitoring source telephone terminal 2. As a result, the procedure for exchanging the absence / release state notification between the monitoring destination telephone terminal and the call control server can be omitted as compared with the case where the terminal state notification device is installed in the call control server. Further, it is not necessary to add a special function to the call control server, and it can be introduced very easily into an existing telephone system.

[Extended embodiment]
In each of the above embodiments, the IP telephone system in which the telephone network 5 is an IP telephone network has been described as an example. However, the present invention is not limited to this. As the telephone network 5, a known communication network such as an IP network or an ISDN network that can transmit and receive various control messages by performing data communication between the call control servers 1, 10 and the telephone terminals 2, 3, 30 is used. And the same effects as described above can be obtained.

  In addition, a PBX system or a button telephone system in which a telephone terminal 3 is connected to a telephone network 5 via an IP network such as an in-house or home LAN, and a call control server (terminal state notification device) is connected to the IP network. Each embodiment of the present invention can also be applied to an IP telephone system such as the above, and the same effects as described above can be obtained. In this case, the monitoring source telephone terminal may be an extension telephone terminal of the same IP telephone system as the monitoring destination telephone terminal 2, and the telephone connected via the telephone network 5 as in the above-described embodiments. It may be a terminal.

  In the first to third embodiments, the case where the terminal state notification device is mounted on the call control server 1 will be described as an example. In the fourth embodiment, the terminal state notification device is the monitoring destination. Although the case where it is mounted on the telephone terminal 30 has been described as an example, the terminal state notification device may be connected to the telephone network 5 as a device independent of the call control server 1 and the telephone terminal 30. In this case, the function of the call control server is separated from the terminal state notification device described in the first to third embodiments. As a result, it is only necessary to additionally connect the terminal state notification device to the telephone network 5, and the terminal state monitoring service can be realized without changing the existing call control server.

In the second and third embodiments, the case where the terminal state notification device is applied to the first embodiment implemented in the call control server 1 has been described as an example, but the present invention is not limited to this. Instead, the terminal state notification device can also be applied to the fourth embodiment in which the monitoring destination telephone terminal 30 is mounted, and the same operational effects as described above can be obtained.
For example, in the second embodiment, the monitoring source telephone terminal 2 registered in the monitoring information 35 </ b> C of the storage unit 35 may be displayed on the display unit 33 in response to the absence cancellation operation at the telephone terminal 30. In the third embodiment, in response to the reception of the incoming message from the call control server 1, the incoming call display may be performed only when the caller is the monitoring source telephone terminal.

  Further, in each embodiment, when a monitoring registration request message is received from an arbitrary telephone terminal, the nuisance list registered in advance is compared with the telephone number of the requesting telephone terminal, and the telephone number of the requesting telephone terminal is determined. If it is included in the nuisance list, selection processing such as not performing monitoring registration may be performed. Thereby, the terminal state notification service for a specific telephone terminal can be stopped, and high security can be realized.

  Further, in each embodiment, when a monitoring registration request is made in the monitoring source telephone terminal 2, the telephone number of the monitoring destination telephone terminal may be input by operation using a dial key or the like, but depending on the monitoring mode setting operation during busy tone transmission Thus, the dial input operation can be omitted by using the telephone number of the destination telephone terminal that has failed in the call connection displayed on the display unit 23 as the telephone number of the monitoring destination telephone terminal.

  In each embodiment, the telephone number of the monitoring destination telephone terminal may be input with a dial key or the like when making a call after the absence release notification in the monitoring source telephone terminal 2. Accordingly, the dial input operation can be omitted by using the telephone number of the monitoring destination telephone terminal notified by the absence cancellation displayed on the display unit 23 as the telephone number of the transmission destination telephone terminal.

It is a block diagram which shows the structure of the terminal state notification apparatus concerning the 1st Embodiment of this invention. It is a structural example of monitoring information. It is a block diagram which shows the structure of the monitoring origin telephone terminal concerning the 1st Embodiment of this invention. It is an example of a structure of monitoring process information. It is a block diagram which shows the structure of the monitoring destination telephone terminal concerning the 1st Embodiment of this invention. It is a structural example of absence processing information. It is a sequence diagram which shows the initial registration operation | movement and absence registration operation | movement in the terminal state notification apparatus concerning the 1st Embodiment of this invention. It is a sequence diagram which shows the monitoring registration operation | movement in the terminal state notification apparatus concerning the 1st Embodiment of this invention. It is a sequence diagram which shows the terminal state notification operation | movement in the terminal state notification apparatus concerning the 1st Embodiment of this invention. It is a sequence diagram which shows the monitoring cancellation | release operation | movement in the terminal state notification apparatus concerning the 1st Embodiment of this invention. It is a structural example of the monitoring information used with the terminal state notification apparatus concerning the 2nd Embodiment of this invention. It is a sequence diagram which shows the absence registration operation | movement and monitoring origin notification setting operation | movement in the terminal state notification apparatus concerning the 2nd Embodiment of this invention. It is a sequence diagram which shows the absence cancellation operation | movement and monitoring origin notification operation | movement in the terminal state notification apparatus concerning the 2nd Embodiment of this invention. It is a sequence diagram which shows the missed call operation | movement in the terminal state notification apparatus concerning the 3rd Embodiment of this invention. It is a block diagram which shows the structure of the terminal state notification apparatus concerning the 4th Embodiment of this invention. It is a sequence diagram which shows the initial registration operation | movement and absence registration operation | movement in the terminal state notification apparatus concerning the 4th Embodiment of this invention. It is a sequence diagram which shows the monitoring registration operation | movement in the terminal state notification apparatus concerning the 4th Embodiment of this invention. It is a sequence diagram which shows the absence cancellation operation | movement and terminal state notification operation | movement in the terminal state notification apparatus concerning the 4th Embodiment of this invention. It is a sequence diagram which shows the monitoring cancellation | release operation | movement in the terminal state notification apparatus concerning the 4th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Call control server (terminal state notification apparatus), 10 ... Call control server, 11 ... Communication I / F part, 12 ... Memory | storage part, 12A ... Call control information, 12B ... Monitoring information, 12P ... Program, 13 ... Control part , 13A ... call control unit, 13B ... monitoring request receiving unit, 13C ... terminal status monitoring unit, 13D ... terminal status notification unit, 2 ... telephone terminal (monitoring source), 2A ... telephone line, 21 ... communication I / F unit, 22 ... voice processing unit, 23 ... display unit, 24 ... operation input unit, 25 ... storage unit, 25A ... call control information, 25B ... monitoring processing information, 25P ... program, 26 ... control unit, 26A ... call control unit, 26B ... Monitoring processing unit, 3 ... Telephone terminal, 3A ... Telephone line, 30 ... Telephone terminal (terminal status notification device), 31 ... Communication I / F unit, 32 ... Voice processing unit, 33 ... Display unit, 34 ... Operation input unit 35 ... Storage unit, 35A ... Call control information, 35 ... absent processing information, 35C ... monitoring information, 35P ... program, 36 ... control unit, 36A ... call control unit, 36B ... absent processing unit, 36C ... monitoring request receiving unit, 36D ... terminal state monitoring unit, 36E ... terminal state notification Department.

Claims (5)

A communication interface unit that connects to a telephone terminal via a communication network and transmits and receives various control messages to and from the telephone terminal;
A storage that stores, as monitoring information, a monitoring source telephone terminal that has requested monitoring of the status of the monitoring destination telephone terminal and a terminal status that indicates the absence / absence release of the monitoring destination telephone terminal regarding the monitoring destination telephone terminal that is the target of status monitoring And
In response to receiving a setting message indicating absence / absence cancellation from the monitoring destination telephone terminal, the absence / absence cancellation status of the monitoring destination telephone terminal is detected, and the terminal status is associated with the monitoring destination telephone terminal and the monitoring is performed. A terminal status monitoring unit to be registered in the information;
In response to detection of the absence release of the monitoring destination telephone terminal by the terminal status monitoring unit, the monitoring source telephone terminal corresponding to the monitoring destination telephone terminal is confirmed with the monitoring information, and the monitoring destination telephone terminal is sent to the monitoring destination telephone terminal and terminal state notifying unit to notify the absence of cancellation,
In response to reception of an incoming message from an arbitrary telephone terminal for a monitoring destination telephone terminal in an absent state, the monitoring information confirms whether the calling telephone terminal matches the monitoring source telephone terminal of the monitoring destination telephone terminal, and A terminal status notification device comprising: a call control unit that notifies an incoming call to the monitored telephone terminal in accordance with a match . In the terminal state notification device according to claim 1 ,
In response to receiving a response message from the monitoring destination telephone terminal for the incoming call, the terminal state notification unit confirms the monitoring source telephone terminal corresponding to the monitoring destination telephone terminal with the monitoring information, and sends the monitoring source telephone terminal to the monitoring source telephone terminal. A terminal state notifying device characterized by notifying the absence of a monitoring destination telephone terminal and deleting the registration of the monitoring source telephone terminal for the monitoring destination telephone terminal in the monitoring information. A communication step of connecting to a telephone terminal via a communication network by the communication interface unit, and transmitting and receiving various control messages to and from the telephone terminal;
Monitoring information about a monitoring destination telephone terminal that is a state monitoring target and a monitoring source telephone terminal that requested monitoring of the status of the monitoring destination telephone terminal and a terminal status indicating absence / absence release of the monitoring destination telephone terminal by the storage unit Storing step as
In response to receiving a setting message indicating absence / absence cancellation from the monitoring destination telephone terminal by the terminal status monitoring unit, the absence / absence cancellation status of the monitoring destination telephone terminal is detected, and the terminal status is detected as the monitoring destination telephone. A terminal status monitoring step for registering in the monitoring information in association with the terminal;
The terminal status notification unit confirms the monitoring source telephone terminal corresponding to the monitoring destination telephone terminal with the monitoring information in response to detection of the absence release of the monitoring destination telephone terminal by the terminal status monitoring unit, and the monitoring source telephone terminal a terminal state notifying step of notifying the absence releases the monitoring telephone terminal to,
Whether the calling telephone terminal matches the monitoring source telephone terminal of the monitoring destination telephone terminal according to reception of an incoming message from any telephone terminal to the monitoring destination telephone terminal in the absence state by the call control unit, the monitoring information And a call control step of notifying the monitoring destination telephone terminal of an incoming call according to the match . A terminal state in which a terminal state indicating absence / absence release of any telephone terminal is notified to another telephone terminal by connecting to the telephone terminal via a communication network and transmitting / receiving various control messages to / from the telephone terminal. In the computer of the notification device,
Monitoring information about a monitoring destination telephone terminal that is a state monitoring target and a monitoring source telephone terminal that requested monitoring of the status of the monitoring destination telephone terminal and a terminal status indicating absence / absence release of the monitoring destination telephone terminal by the storage unit Storing step as
In response to receiving a setting message indicating absence / absence cancellation from the monitoring destination telephone terminal by the terminal status monitoring unit, the absence / absence cancellation status of the monitoring destination telephone terminal is detected, and the terminal status is detected as the monitoring destination telephone. A terminal status monitoring step for registering in the monitoring information in association with the terminal;
The terminal status notification unit confirms the monitoring source telephone terminal corresponding to the monitoring destination telephone terminal with the monitoring information in response to detection of the absence release of the monitoring destination telephone terminal by the terminal status monitoring unit, and the monitoring source telephone terminal a terminal state notifying step of notifying the absence releases the monitoring telephone terminal to,
Whether the calling telephone terminal matches the monitoring source telephone terminal of the monitoring destination telephone terminal according to reception of an incoming message from any telephone terminal to the monitoring destination telephone terminal in the absence state by the call control unit, the monitoring information And a call control step of notifying the monitored telephone terminal of the incoming call according to the match . A call control server that connects to a telephone terminal via a communication network and performs call control by transmitting and receiving various control messages to and from the telephone terminal;
A storage that stores, as monitoring information, a monitoring source telephone terminal that has requested monitoring of the status of the monitoring destination telephone terminal and a terminal status that indicates the absence / absence release of the monitoring destination telephone terminal regarding the monitoring destination telephone terminal that is the target of status monitoring And
In response to receiving a setting message indicating absence / absence cancellation from the monitoring destination telephone terminal, the absence / absence cancellation status of the monitoring destination telephone terminal is detected, and the terminal status is associated with the monitoring destination telephone terminal and the monitoring is performed. A terminal status monitoring unit to be registered in the information;
In response to detection of the absence release of the monitoring destination telephone terminal by the terminal status monitoring unit, the monitoring source telephone terminal corresponding to the monitoring destination telephone terminal is confirmed with the monitoring information, and the monitoring destination telephone terminal is sent to the monitoring destination telephone terminal and terminal state notifying unit to notify the absence of cancellation,
In response to reception of an incoming message from an arbitrary telephone terminal for a monitoring destination telephone terminal in an absent state, the monitoring information confirms whether the calling telephone terminal matches the monitoring source telephone terminal of the monitoring destination telephone terminal, and A call control server comprising: a call control unit for notifying an incoming call to the monitoring destination telephone terminal in accordance with a match .

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