JP7024496B2 - Telephone control device - Google Patents

Description

The present invention relates to a terminal control technique when a wireless terminal internally accommodated in a telephone control device via a base station is reconnected to the base station.

For telephone systems such as business phone systems and PBX systems, wireless terminals such as PHS (Personal Handy-phone System) and DECT (Digital Enhanced Cordless Telecommunications) can be used as telephone control devices such as main devices and PBX devices. Some are accommodated by extension via a base station and provide various telephone services such as voice calls.

Further, in such a telephone system, in order to expand the area where the wireless terminal can move, a plurality of base stations are connected to the telephone control device, and the wireless terminal communicates between these base stations while continuing voice communication and data communication. Some perform so-called handover control that can be moved (see, for example, Non-Patent Document 1).

Normally, in such handover control, the wireless areas of two adjacent base stations are partially overlapped and arranged, and when the wireless terminal passes through the overlapping areas, it is used for voice communication via the base station of the moving source. The procedure of forming a new extension-side path via the destination base station while retaining the original extension-side path of, and disconnecting the original extension-side path when the formation of the new extension-side path is completed. Stepping on.
In addition, for handover control, even if the wireless terminal moves out of the service area that does not enter the wireless area of any base station, the voice call is not immediately disconnected and is maintained for a certain period of time to maintain the original. Some will resume voice calls when they return to the base station area.

Japanese Unexamined Patent Publication No. 5-22188

"Agrea (LT900) Mobile Solution", Saxa Co., Ltd., http://www.saxa.co.jp/product/business/lt900/function/mobile.html, 2017

However, in such a conventional technique, when the wireless terminal returns to the range of the original base station and resumes the original voice call, the wireless terminal controls the reconnection by telephone based on the terminal information held by the wireless terminal. Since it is a request to the device, there is a problem that the original voice call cannot be resumed when the terminal information of the wireless terminal disappears due to the loss of power supply.

As a technology for dealing with battery exhaustion and operation stoppage due to malfunction in wireless terminals, when the battery voltage falls below the threshold voltage, the data recorded in the volatile memory in the wireless telephone is converted to the non-volatile memory. A technique for transferring has been proposed (see, for example, Patent Document 1).
Therefore, if such a conventional technique is used, the operating state before the operation is stopped can be held by the wireless terminal, and after the operation is restarted, the held operating state is notified to the telephone control device to make a voice call. Is conceivable.

However, when the wireless terminal returns to the range of a different base station instead of the original base station, the connection form is different from the terminal information held by the wireless terminal, and the extension held by the telephone system side. Since the connection form is different from that of the side pass, the original voice call cannot be resumed.
In addition, the case where the wireless terminal returns to the range of a different base station instead of the original base station corresponds to the handover control, but in the handover control, the predetermined procedure as described above may be taken. Since it is a condition, it cannot be applied to cases where the user returns to the range of a different base station.

The present invention is for solving such a problem, and an object of the present invention is to provide a terminal control technique capable of resuming a voice call even when the operation of the wireless terminal during a voice call is restarted after the operation is stopped. It is supposed to be.

In order to achieve such an object, the telephone control device according to the present invention is a telephone control device that exchanges and connects a wireless terminal accommodated in an extension to a communication network via a base station, and controls the operating state of the wireless terminal. When the terminal management unit that sequentially acquires and records in the terminal information of the storage unit and the terminal connection confirmation indicating that the wireless terminal is connected to the base station are notified from the base station, the terminal connection confirmation is recorded in the storage unit. It is provided with a call control unit that controls the wireless terminal according to the latest operating state before the notification of the terminal connection confirmation recorded in the terminal information by referring to the terminal information related to the wireless terminal. When the call control unit indicates that the latest operating state is talking to the other party terminal via the communication network, the call control unit transmits an extension side path reforming instruction to the wireless terminal via the base station. By connecting the network-side path with the other terminal and the extension-side path via the communication network in response to the completion of the reformation of the extension-side path with the radio terminal via the base station, the radio is used. The call between the terminal and the other party terminal is resumed.

Further, in one configuration example of the telephone control device according to the present invention, when the call control unit indicates that the latest operating state is during a call with the other party terminal, it depends on whether or not the network side path remains. Therefore, it is determined whether or not the extension side path reforming instruction needs to be transmitted.

Further, in one configuration example of the telephone control device according to the present invention, when the call control unit indicates that the latest operating state is in a call with the other party terminal, the call control unit indicates that the latest operating state is during a call. The original base station to which the wireless terminal is connected is compared with the new base station notified of the terminal connection confirmation, and if the original base station and the new base station are different, the original base station is used. The base station is instructed to disconnect the extension side path used for the call by the wireless terminal.

Further, in one configuration example of the telephone control device according to the present invention, the call control unit determines whether or not the elapsed time from the latest operating state to the notification of the terminal connection confirmation is within a certain time. It is intended to determine whether or not the extension side path reformation instruction needs to be transmitted.

Further, in one configuration example of the telephone control device according to the present invention, the path transmitted by the call control unit when the extension side path reforming instruction newly forms an extension side path with the wireless terminal. It consists of formation instructions.

According to the present invention, the operating state of the wireless terminal is maintained on the telephone control device side. Therefore, when the wireless terminal during a voice call resumes operation after the operation is stopped, the wireless terminal is further lost due to power loss. Even if the terminal information disappears, it is possible to automatically resume the call between the wireless terminal and the other party's terminal according to the connection to the base station according to the resumption of the operation of the wireless terminal.

It is a block diagram which shows the structure of a telephone control device. It is a sequence diagram which shows the voice call start operation. It is a sequence diagram which shows the voice call resumption operation which concerns on 1st Embodiment. It is a sequence diagram which shows the voice call resumption operation which concerns on 2nd Embodiment.

Next, an embodiment of the present invention will be described with reference to the drawings.
[First Embodiment]
First, the telephone control device 10 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration of a telephone control device.

The telephone control device 10 is used in a telephone system 1 such as a business telephone system or a PBX system, and is connected to a communication network NW via a communication line L1 and a base station 21 connected to a communication line L2. , 22 to accommodate the wireless terminal 20 as an extension, and to accommodate a plurality of extension terminals (extension telephones) 23 via the communication line L2, and to exchange and connect these wireless terminals 20 and the extension terminal 23 to the communication network NW. It has a function to provide a voice call service.

In the following, for ease of understanding, the case where the telephone system 1 has two base stations 21 and 22 and one wireless terminal 20 will be described as an example, but the present invention is not limited to this, and the base is not limited to this. There may be three or more stations, and there may be a plurality of wireless terminals.

As a specific example of the telephone control device 10, there is a telephone control device used as a main device or a PBX device in a telephone system 1 such as a business phone system or a PBX system. The communication network NW is an existing communication network such as ISDN (Integrated Services Digital Network), PSTN (Public Switched Telephone Network), and mobile communication network, in addition to the next generation network (NGN) and IP communication network.

[Telephone control device]
Next, with reference to FIG. 1, the configuration of the telephone control device 10 according to the present embodiment will be described in detail.
The telephone control device 10 includes a network I / F unit 11, an extension I / F unit 12, a switch unit 13, a storage unit 14, a terminal management unit 15, and a call control unit 16 as main functional units. They are connected to each other via bus B. Among these functional units, the terminal management unit 15 and the call control unit 16 are realized by the cooperation of the CPU and the program.

The network I / F unit 11 has a function of transmitting and receiving a call control message (call control signal) and voice data (voice signal) to and from the communication network NW via the communication line L1.
The extension I / F unit 12 has a function of transmitting and receiving control messages and voice data between the base stations 21 and 22 and the extension terminal 23 via the communication line L2.
The switch unit 13 is connected between the network side path connected from the network I / F unit 11 to the remote terminal 30 via the communication network NW and the wireless terminal 20 via the base stations 21 and 22. It has a function to exchange and connect with the extension side path.

The storage unit 14 is composed of a storage device such as a hard disk or a semiconductor memory as a whole, and has a function of storing various processing data used for call control and terminal control in the telephone control device 10 and a program to be executed by the CPU. ing.

The terminal information 14A is the main processing data stored in the storage unit 14. The terminal information 14A is data indicating the latest operating state of the wireless terminal 20. As an example of this terminal information 14A, the date and time regarding the operating state, the base station identification information of the base station to which the wireless terminal 20 is wirelessly connected, the path information regarding the extension side path formed with the base station, and the communication network. There are other party identification information indicating the other party terminal 30 for a call / communication connected via the NW, display contents displayed on the wireless terminal 20, and the like.

The terminal management unit 15 has a function of sequentially acquiring the operating state of the wireless terminal 20 and sequentially recording it in the terminal information 14A of the storage unit 14.

The call control unit 16 has a function of performing call control such as outgoing / incoming call using the communication network NW, call control of the wireless terminal 20 and the extension terminal 23 based on the operation of the wireless terminal 20 and the extension terminal 23, and a base station 21. When the terminal connection confirmation indicating that the wireless terminal 20 is connected to the base station is notified from (22), the terminal information 14A regarding the wireless terminal 20 recorded in the storage unit 14 is referred to, and the terminal information 14A is used. It has a function of controlling the wireless terminal 20 according to the latest operating state before the recorded terminal connection confirmation notification.

Specifically, when the call control unit 16 indicates that the latest operating state is in a call with the remote terminal 30 via the communication network NW, the call control unit 16 connects to the wireless terminal 20 via the base station 21 (22) on the extension side. A path reforming instruction is transmitted, and a network-side path and an extension-side path with the other terminal 30 via the communication network NW are completed according to the completion of formation of the extension-side path with the wireless terminal 20 via the base station 21 (22). It has a function of resuming a call between the wireless terminal 20 and the other party terminal 30 by connecting to.

Further, the call control unit 16 has a function of determining whether or not an extension side path reforming instruction needs to be transmitted depending on whether or not the network side path remains when the latest operation state indicates that the call is in progress with the other terminal 30. It has a function of determining whether or not an extension side path reformation instruction needs to be transmitted depending on whether or not the elapsed time from the latest operating state to the notification of terminal connection confirmation is within a certain time.

The wireless terminal 20 is a wireless communication terminal connected to the base stations 21 and 22 via the wireless line L3 based on a wireless system such as PHS or DECT.
The extension terminal 23 is an extension telephone terminal used in a general telephone system such as a business phone system or a PBX system.

[Operation of the first embodiment]
Next, the operation of the telephone control device 10 according to the present embodiment will be described.
First, with reference to FIG. 2, the operation of the telephone control device 10 at the start of the voice call of the wireless terminal 20 will be described. FIG. 2 is a sequence diagram showing a voice call start operation.

As shown in FIG. 2, when the power is turned on, the wireless terminal 20 confirms the wireless status based on the beacons from the base stations 21 and 22 (step S100), and the base station having the best wireless status, in this example, the base. The station 21 is selected as a connection target, and the base station selection indicating the selection result is transmitted to the base station 21 via the wireless line L3 (step S101).
The base station 21 notifies the telephone control device 10 of the terminal connection confirmation indicating that the connection of the wireless terminal 20 to itself has been confirmed according to the base station selection notified from the wireless terminal 20 via the communication line L2. (Step S102).

The terminal management unit 15 of the telephone control device 10 acquires the content of the terminal connection confirmation notified from the base station 21, and records in the terminal information 14A of the storage unit 14 that the wireless terminal 20 is connected to the base station 21. do. Since the terminal information 14A is recorded by the terminal management unit 15 every time the operating state of the wireless terminal 20 changes, for example, the description of these recording steps and the individual description in the sequence diagram are omitted.

After that, in response to the outgoing call operation by the user (step S110), the wireless terminal 20 transmits a outgoing call request including the dial number of the remote terminal 30 whose operation has been input to the telephone control device 10 (step S111).
When the telephone control device 10 receives a transmission request from the wireless terminal 20 via the base station 21 via the extension I / F unit 12, the call control unit 16 receives the network I / F unit 11 and the communication line L1. A transmission request to the remote terminal 30 is transmitted to the communication network NW via the above (step S112).

Further, the call control unit 16 transmits a path formation instruction from the extension I / F unit 12 to the wireless terminal 20 via the base station 21 in response to the reception of the transmission request (step S113).
The base station 21 transfers the path formation instruction from the telephone control device 10 to the wireless terminal 20 via the wireless line L3, and the telephone control device 10 is based on information such as the type of the path included in the path formation instruction. A base station path forming process is executed between the two (step S114), and a base station path for a voice call connecting the telephone control device 10 and the base station 21 via the communication line L2 is formed (step S115).

Further, the wireless terminal 20 receives the path formation instruction transferred from the base station 21 via the wireless line L3, and is connected to the base station 21 based on information such as the type of the path included in the path formation instruction. In (step S116), a terminal path forming process is executed to form a terminal path for a voice call connecting the telephone control device 10 and the base station 21 via the wireless line L3 (step S117).

After that, when the call control unit 16 receives the response from the remote terminal 30 from the communication network NW via the network I / F unit 11 and the communication line L1 (step S120), the call control unit 16 receives the response from the remote terminal 30 (step S120), the remote terminal via the communication network NW. The extension side path of the wireless terminal 20 including the terminal path and the base station path formed as described above is connected to the network side path with 30 (step S121). As a result, a voice call between the wireless terminal 20 and the other terminal 30 is started (step S122).

Next, with reference to FIG. 3, a call reforming operation of the telephone control device 10 will be described when the operation of the wireless terminal 20 during a voice call with the other party terminal 30 is temporarily stopped and then resumed. do. FIG. 3 is a sequence diagram showing a voice call resumption operation according to the first embodiment.

As shown in FIG. 3, when the wireless terminal 20 stops operating due to loss of power due to battery consumption or malfunction during a voice call with the other terminal 30 via the base station 21 (step S150). (Step S151), the terminal path to and from the base station 21 is disconnected (step S152).

After that, when the operation is restarted by connecting an external battery such as a battery pack to the wireless terminal 20 or charging the wireless terminal 20 with a charger (step S160), the wireless terminal 20 is in the same state as when the normal power supply is started. Similarly, the radio status is confirmed based on the beacons from the base stations 21 and 22 (step S161), the base station with the best radio status, in this example, the original base station 21 is selected as the connection target, and the selection is made. The base station selection indicating the result is transmitted to the base station 21 via the wireless line L3 (step S162).

The base station 21 notifies the telephone control device 10 of the terminal connection confirmation indicating that the connection of the wireless terminal 20 to itself has been confirmed according to the base station selection notified from the wireless terminal 20 via the communication line L2. (Step S163).
The call control unit 16 of the telephone control device 10 refers to the terminal information 14A regarding the wireless terminal 20 recorded in the storage unit 14 in response to the terminal connection confirmation notified from the base station 21, and is recorded in the terminal information 14A. Before notifying the terminal connection confirmation, the latest operating state is confirmed (step S170).

Here, since it is shown that the latest operating state of the wireless terminal 20 was in a call with the other terminal 30 (step S171), the call control unit 16 first indicates the original base station of the wireless terminal 20 in the latest operating state. Is compared with the new base station of the wireless terminal 20 notified by the terminal connection confirmation. In this case, since the original base station 21 and the new base station 21 match (step S172), it is determined that the base station path between the base station 21 and the base station 21 can be reused, and the connection between the original base station 21 and the new base station 21 is determined to be reusable. Do not send the disconnection instruction of the base station path of, and keep it as it is.

After that, the call control unit 16 determines whether or not the path reforming instruction needs to be transmitted by confirming whether or not the network-side path with the other party terminal 30 via the communication network NW remains. In this example, since the voice call is not terminated from the remote terminal 30 and the network side path remains, it is determined that it is necessary to transmit the path reformation instruction (step S173), and the following steps are taken. The voice call reformation process from S180 to S185 is executed.

First, the call control unit 16 transmits a path reforming instruction to the wireless terminal 20 via the base station 21 which is the transmission source of the terminal connection confirmation (step S180).
The base station 21 transfers the path reforming instruction from the telephone control device 10 to the wireless terminal 20 via the wireless line L3 (step S181). At this time, the base station 21 confirms whether the base station path to and from the telephone control device 10 used by the wireless terminal 20 remains, and in this example, the corresponding base station path remains. No new base station path is formed.

Further, the wireless terminal 20 receives the path reforming instruction transferred from the base station 21 via the wireless line L3, and based on the information such as the type of the path included in the path reforming instruction, the wireless terminal 20 and the base station 21 A terminal path forming process is executed between the two (step S182) to form a new terminal path for a voice call connecting the telephone control device 10 and the base station 21 via the wireless line L3 (step S183).

After that, the call control unit 16 adds an extension of the wireless terminal 20 including the remaining base station path and the terminal path reshaped as described above to the network side path with the remaining partner terminal 30. Reconnect the side path (step S184). As a result, the voice call between the wireless terminal 20 and the other terminal 30 via the original base station 21 is resumed (step S185).

In step S170 of FIG. 3, the time related to the latest operating state of the wireless terminal 20 recorded in the terminal information 14A of the storage unit 14 is confirmed, and the elapsed time from the latest operating state to the notification of the terminal connection confirmation is a fixed time. If it exceeds, it may be determined that it is not necessary to transmit the extension side path reformation instruction. As a result, if a certain amount of time has passed from the operation stop to the operation restart and there is a high possibility that the original voice call is not maintained, the transmission of the path reforming instruction is avoided, and the unnecessary path reforming process is performed. Execution can be suppressed.

Further, the path reforming instruction transmitted in step S180 of FIG. 3 is called when a new extension side path is formed between the telephone control device 10 and the wireless terminal 20 described in step S113 of FIG. The path formation instruction transmitted from the control unit 16 may be used. As a result, the extension side path can be reshaped by using the existing processing operation without changing the processing operation of the base stations 21 and 22 and the wireless terminal 20. Therefore, the present invention can be applied to an existing telephone system without newly replacing the base stations 21 and 22 and the wireless terminal 20 or updating the software.

Further, when the terminal information 14A includes the original display contents on the wireless terminal 20, the path reforming instruction transmitted in step S180 of FIG. 3 includes, for example, a talk time, a call partner's name or telephone number, and a call line. It may be transmitted including the original display contents such as the line lamp display related to. As a result, the display content immediately before the operation of the wireless terminal 20 is stopped can be quickly restored.

Further, in step S171 of FIG. 3, if the latest operating state of the wireless terminal 20 is not during a call with the other terminal 30, the execution of the subsequent steps will be cancelled. At this time, as described above, the original display content on the wireless terminal 20 included in the terminal information 14A, for example, the display content such as the clock / calendar display displayed in the idle state is transmitted to the wireless terminal 20. You may do it.
When the original base station 21 and the new base station 21 do not match in step S172 of FIG. 3, the details will be described later with reference to FIG.

Further, in step S173 of FIG. 3, if the network side path is disconnected due to a reason such as the end call operation being performed on the remote terminal 30, and the network side path does not remain, it is not necessary to transmit the path reformation instruction. Judging that, the execution of the steps after this will be canceled. At this time, as described above, the original display content on the wireless terminal 20 included in the terminal information 14A, for example, the display content such as the clock / calendar display displayed in the idle state is transmitted to the wireless terminal 20. You may do it. Further, the display content indicating that the other party terminal 30 has finished speaking may be transmitted to the wireless terminal 20, and further, screen data that can be selectively operated to retransmit to the other party terminal 30 may be transmitted.

[Effect of the first embodiment]
As described above, in the present embodiment, the terminal management unit 15 sequentially acquires the operating state of the wireless terminal 20 and records it in the terminal information 14A of the storage unit 14, and the call control unit 16 causes the base station 21 (22). When the terminal connection confirmation is notified from, the terminal information 14A is referred to, and when it is indicated that the latest operating state of the wireless terminal 20 is talking with the other terminal 30 via the communication network NW, the base station 21 (22) ) Is transmitted to the wireless terminal 20 via the communication network NW in response to the completion of the reformation of the internal path with the wireless terminal 20 via the base station 21 (22). By connecting the network side path to the terminal 30 and the extension side path, the call between the wireless terminal 20 and the other party terminal 30 is resumed.

As a result, the operating state of the wireless terminal 20 is maintained on the telephone control device 10 side. Therefore, when the wireless terminal 20 during a voice call resumes operation after the operation is stopped, the wireless terminal 20 is further lost due to power loss. Even if the terminal information of the wireless terminal 20 has disappeared, it is possible to automatically resume the call between the wireless terminal 20 and the other terminal 30 according to the connection to the base station 21 according to the resumption of the operation of the wireless terminal 20. Become.

[Second Embodiment]
Next, the telephone control device 10 according to the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a sequence diagram showing a voice call resumption operation according to the second embodiment.
In FIG. 3 described above, the case where the original base station and the new base station match before and after the operation stop of the wireless terminal 20 has been described, but after the operation stop of the wireless terminal 20, what is the original base station? It is possible that the user may move to the radio area of another different base station. In this case, depending on the restart of the operation of the wireless terminal 20, the connection is made with another base station different from the original base station. In the present embodiment, a case where the original base station and the new base station do not match will be described.

As shown in FIG. 4, after the wireless terminal 20 loses power due to battery exhaustion or malfunction and stops operating, an external battery such as a battery pack can be connected to the wireless terminal 20 or the wireless terminal 20 can be used with a charger. When the operation is restarted by charging (step S200), the radio status is confirmed based on the beacons from the base stations 21 and 22 (step S201) as in the case of normal power activation, and the radio status is the highest. A good base station, in this example, a base station 22 different from the original base station 21 is selected as a connection target, and a base station selection indicating the selection result is transmitted to the base station 22 via the wireless line L3. (Step S202).

The base station 22 notifies the telephone control device 10 of the terminal connection confirmation indicating that the connection of the wireless terminal 20 to itself has been confirmed according to the base station selection notified from the wireless terminal 20 via the communication line L2. (Step S203).
The call control unit 16 of the telephone control device 10 refers to the terminal information 14A regarding the wireless terminal 20 recorded in the storage unit 14 in response to the terminal connection confirmation notified from the base station 22, and is recorded in the terminal information 14A. Before notifying the terminal connection confirmation, the latest operating state is confirmed (step S210).

Here, since it indicates that the latest operating state of the wireless terminal 20 was in a call with the other terminal 30 (step S211), the call control unit 16 first first connects the original connection base of the wireless terminal 20 in the latest operating state. The station is compared with the new connection base station of the wireless terminal 20 notified by the terminal connection confirmation. In this case, since the original base station 21 and the new base station 22 do not match (step S212), the call control unit 16 uses the base that the wireless terminal 20 used to make a call to the original base station 21. Instructing the disconnection of the station path (step S213). In response to this, the base station 21 disconnects the base station path from the telephone control device 10 used by the wireless terminal 20 for the call (step S214).

After that, the call control unit 16 determines whether or not the path reforming instruction needs to be transmitted by confirming whether or not the network-side path with the other party terminal 30 via the communication network NW remains. In this example, since the voice call is not terminated from the other party terminal 30 and the network side path remains (step S215), the following voice call reforming process from steps S220 to S227 is performed. Execute.

First, the call control unit 16 transmits a path reforming instruction to the wireless terminal 20 via the base station 22 which is the transmission source of the terminal connection confirmation (step S220).
The base station 22 transfers the path reforming instruction from the telephone control device 10 to the wireless terminal 20 via the wireless line L3 (step S221).

At this time, the base station 22 confirms whether the base station path to and from the telephone control device 10 used by the wireless terminal 20 remains. In this example, since the corresponding base station path does not remain, the base station 22 executes a base station path forming process with the telephone control device 10 (step S222), and telephone control via the communication line L2. A new base station path for voice communication connecting the device 10 and the base station 22 is formed (step S223).

Further, the wireless terminal 20 receives the path reforming instruction transferred from the base station 22 via the wireless line L3, and based on the information such as the type of the path included in the path reforming instruction, the wireless terminal 20 and the base station 21 A terminal path forming process is executed between the two (step S224), and a new terminal path for a voice call connecting the telephone control device 10 and the base station 21 via the wireless line L3 is formed (step S225).

After that, the call control unit 16 connects the extension side path of the wireless terminal 20 including the terminal path and the base station path reformed as described above to the network side path with the remaining partner terminal 30. (Step S226). As a result, the voice call between the wireless terminal 20 and the other terminal 30 is resumed via the base station 22 different from the original base station 21 (step S227).

In step S210 of FIG. 4, the time related to the latest operating state of the wireless terminal 20 recorded in the terminal information 14A of the storage unit 14 is confirmed, and the elapsed time from the latest operating state to the notification of the terminal connection confirmation is a fixed time. If it exceeds, it may be determined that it is not necessary to transmit the extension side path reformation instruction. As a result, if a certain amount of time has passed from the operation stop to the operation restart and there is a high possibility that the original voice call is not maintained, the transmission of the path reforming instruction is avoided, and the unnecessary path reforming process is performed. Execution can be suppressed.

Further, the path reforming instruction transmitted in step S220 of FIG. 4 is called when a new extension side path is formed between the telephone control device 10 and the wireless terminal 20 described in step S113 of FIG. The path formation instruction transmitted from the control unit 16 may be used. As a result, the extension side path can be reshaped by the existing processing operation without changing the processing operation of the base stations 21 and 22 and the wireless terminal 20. Therefore, the present invention can be applied to an existing telephone system without newly replacing the base stations 21 and 22 and the wireless terminal 20 or updating the software.

Further, when the terminal information 14A includes the original display content on the wireless terminal 20, the path reforming instruction transmitted in step S220 of FIG. 4 includes, for example, a talk time, a call partner's name or telephone number, and a call line. It may be transmitted including the original display contents such as the line lamp display related to. As a result, the display content immediately before the operation of the wireless terminal 20 is stopped can be quickly restored.

Further, in step S211 of FIG. 4, if the latest operating state of the wireless terminal 20 is not during a call with the other terminal 30, the execution of the subsequent steps will be cancelled. At this time, as described above, the original display content on the wireless terminal 20 included in the terminal information 14A, for example, the display content such as the clock / calendar display displayed in the idle state is transmitted to the wireless terminal 20. You may do it.

Further, in step S215 of FIG. 4, if the network side path is disconnected due to a reason such as the end call operation being performed on the remote terminal 30, and the network side path does not remain, it is not necessary to transmit the path reformation instruction. Judging that, the execution of the steps after this will be canceled. At this time, as described above, the original display content on the wireless terminal 20 included in the terminal information 14A, for example, the display content such as the clock / calendar display displayed in the idle state is transmitted to the wireless terminal 20. You may do it. Further, the display content indicating that the other party terminal 30 has finished speaking may be transmitted to the wireless terminal 20, and further, screen data that can be selectively operated to retransmit to the other party terminal 30 may be transmitted.

[Effect of the second embodiment]
As described above, in the present embodiment, when the call control unit 16 indicates that the latest operating state is during a call with the other terminal 30, the wireless terminal 20 is connected at the time of the call indicated by the latest operating state. Compare the base station 21 of the above with the new base station 22 notified of the terminal connection confirmation, and if the original base station 21 and the new base station 22 are different, the wireless terminal with respect to the original base station 21 20 is instructed to disconnect the extension side path used for the call.
As a result, the base station path between the original base station 21 that is no longer used and the telephone control device 10 can be immediately disconnected, and the communication band of the communication line L2 can be used efficiently.

[Extension of embodiment]
Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. Various modifications that can be understood by those skilled in the art can be made to the structure and details of the present invention within the scope of the present invention. In addition, each embodiment can be implemented in any combination within a consistent range.

In each of the above-described embodiments, the case where the wireless terminal 20 makes a voice call before the operation is stopped and reshapes the voice call interrupted after the operation is resumed has been described as an example, but is limited to the voice call. Instead, the interrupted data communication can be reshaped.
For example, if the operation of the wireless terminal 20 is stopped while the wireless terminal 20 is in data communication with a server connected to the communication network NW, the wireless terminal responds to a terminal connection confirmation notification from the base station in the same manner as described above. The extension side path with 20 may be reformed and connected to the net side path.

In this case, the extension side path needs to be reformed by a communication path for data communication, not a call path for voice call. The type of such an extension side path may be indicated by an extension side path reformation instruction based on the latest operating state of the wireless terminal 20 recorded in the terminal information 14A of the storage unit 14. This makes it possible to reshape the interrupted data communication.

1 ... Telephone system, 10 ... Telephone control device, 11 ... Network I / F unit, 12 ... Extension I / F unit, 13 ... Switch unit, 14 ... Storage unit, 15 ... Terminal management unit, 16 ... Call control unit, B ... Internal bus, 20 ... Wireless terminal, 21,22 ... Base station, 23 ... Extension terminal, 30 ... Remote terminal, L1, L2 ... Communication line, NW ... Communication network.

Claims (5)

It is a telephone control device that exchanges and connects wireless terminals accommodated in extensions to a communication network via a base station.
A terminal management unit that sequentially acquires the operating state of the wireless terminal and records it in the terminal information of the storage unit.
When the base station notifies the terminal connection confirmation indicating that the wireless terminal is connected to the base station, the terminal information regarding the wireless terminal recorded in the storage unit is referred to and recorded in the terminal information. It is provided with a call control unit that controls the wireless terminal according to the latest operating state before the notification of the terminal connection confirmation.
When the call control unit indicates that the latest operating state is in a call with the other terminal via the communication network, the call control unit transmits an extension side path reforming instruction to the wireless terminal via the base station. By connecting the network-side path with the other terminal and the extension-side path via the communication network in response to the completion of the re-formation of the extension-side path with the radio terminal via the base station, the radio can be used. A telephone control device characterized by resuming a call between a terminal and the other party's terminal. In the telephone control device according to claim 1,
When the call control unit indicates that the most recent operating state is during a call with the other party terminal, the call control unit determines whether or not to transmit the extension side path reforming instruction according to the presence or absence of the remaining network side path. A telephone control device characterized by. In the telephone control device according to claim 1 or 2.
When the call control unit indicates that the latest operating state was in a call with the other party terminal, the call control unit connects the terminal to the original base station to which the wireless terminal was connected at the time of the call indicated by the latest operating state. Comparing with the new base station that notified the confirmation, if the original base station and the new base station are different, the extension line used by the wireless terminal for a call to the original base station. A telephone control device characterized by instructing the disconnection of a side path. In the telephone control device according to any one of claims 1 to 3.
The call control unit is characterized in that it determines whether or not it is necessary to transmit the extension side path reforming instruction depending on whether or not the elapsed time from the latest operation state to the notification of the terminal connection confirmation is within a certain time. Telephone control device. In the telephone control device according to any one of claims 1 to 4.
The extension side path reforming instruction is a telephone control device comprising a path forming instruction transmitted by the call control unit when a new extension side path is formed with the wireless terminal.

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