JP5812442B2 - IP telephone terminal and system - Google Patents

Description

  The present invention relates to a technology that enables a call by an IP telephone terminal even when a communication line used by the IP telephone terminal is abnormal.

  The extension telephone disclosed in Patent Document 1 is connected to the extension of the main apparatus that accommodates the outside line and the extension, and stores the other party telephone number during a call. Then, when any of the abnormality of the extension, the abnormality of the main unit, or the power failure is detected during the call through the extension, it is connected to the detour outside line that bypasses the main unit, and via the detour outside line. Automatically call the other party's phone number when an abnormality occurs. According to the extension telephone, since an automatic call is made via a bypass line when an abnormality occurs during a call on a normal use line, it is troublesome to make a call using the bypass line after checking the telephone number of the other party. Can be omitted.

  The IP telephone terminal disclosed in Patent Document 2 includes an IP extension operation unit and an IP extension operation unit, and the IP extension operation unit is connected to an IP switching apparatus that accommodates the IP extension via a LAN or WAN, and performs IP exchange. The IP external line operation unit functions as a terminal directly connected to the IP external line without going through the IP switching apparatus. The IP telephone terminal activates the IP outside line operation unit when detecting an abnormality of the IP switching apparatus, and enables communication via the IP outside line. According to the IP telephone terminal, the IP telephone line (corresponding to the IP outside line) used at the normal time is utilized even in the event of a failure of the IP switching apparatus, so there is no need to permanently install a communication line at the time of the failure. .

  A home security linkage system disclosed in Patent Document 3 includes a first home security system introduced in a first house, a second home security system introduced in a second house, and a security company. Management system. The first home security system and the second home security system are connected to the management system via respective communication lines and are also connected to each other by a protection line. One of the first home security system and the second home security system, for example, the first home security system, when an abnormality such as an intruder or disaster is detected, notifies the management system via its own communication line. At the same time, the second home security system is notified via the protection line. When the second home security system receives a notification from the first home security system via the protection line, the second home security system notifies the management system via its own communication system. According to the home security cooperation system, for example, even if an intruder disconnects the communication line between the first home security system and the management system, the abnormality detected by the first home security system is notified to the management system. Can do.

  The system disclosed in Patent Document 4 includes a plurality of network node devices such as HGW (home gateway) and a management server. The plurality of network node devices are respectively connected to a network (for example, PSTN: Public Switched Telephone Network) via connection lines (for example, telephone paths) that are independent from each other, and are connected to a connection line (for example, a network other than the telephone path). Route) to the management server. When a large-scale disaster or the like occurs, the management server notifies each network node device of an emergency state via a network route, and each network node device responds to the notification of the emergency state with its own telephone route. The management server is notified of whether or not connection to the PSTN is possible. The management server notifies the network node device information about the network node device that cannot be used. The disabled network node device or a terminal under the disabled network node device connects to the PSTN via the enabled network node device notified from the management server.

JP 2008-258841 A JP 2008-135806 A JP 2007-257113 A JP2012-080453A

  However, the extension telephone disclosed in Patent Document 1 must always be installed with a detour outside line.

  The IP telephone terminal disclosed in Patent Document 2 substantially has the function of an IP switching apparatus in itself, and uses the function of the IP switching apparatus provided in itself when an abnormality occurs in the IP switching apparatus normally used. However, it is impossible to secure a communication line when an abnormality occurs in the IP telephone line itself connected to the IP telephone line.

  In the home security system disclosed in Patent Document 3, when a line between one home security system, for example, the first home security system and the management system is disconnected, an abnormality detected by the home security system is changed to another Instead, the home security system can notify the management system, and a communication path from the first home security system to any emergency contact cannot be secured.

  In the system disclosed in Patent Literature 4, it is necessary for the management server to collect network node devices, and when the management server is not functioning, it is impossible to secure a communication path for the network node devices.

  Further, in the system disclosed in Patent Document 4, each network node device also requires a net route for connecting to the management server, separately from the call route. In addition, in order for the network node device to be impossible to obtain information on the network node device, it is necessary to communicate with the management server via the network route. In addition to the telephone route, if the network route is abnormal, The network node device cannot obtain information on the network node device, and cannot connect to the PSTN via the network node device.

  The present invention has been made in view of the above circumstances. Even when an abnormality occurs in a communication line used by an IP telephone terminal in a normal state without going through a management server, the IP telephone terminal can be connected to an arbitrary call partner. Provide technology that enables calls.

  One aspect of the present invention is an IP telephone terminal. The IP telephone terminal performs a call through a communication network, and is normally connected to the communication network through a first connection line.

  The IP telephone terminal holds information necessary for connecting an abnormality detection unit for detecting an abnormality of the first connection line and another IP telephone terminal having a base unit function via the second connection line. An information holding unit, and when the abnormality detecting unit detects an abnormality of the first connection line, the information held by the information holding unit is used to transmit the information via the second connection line. By connecting to another IP telephone terminal and becoming a slave unit of the other IP telephone terminal, the telephone is connected to the communication network via the other IP telephone terminal.

  Another aspect of the present invention is also an IP telephone terminal. The IP telephone terminal has a base unit function, is connected to a management server, is connected to a communication network via a first connection line, and has a spare connection unit and a control unit.

  The spare connection unit is for connecting to another IP telephone terminal via the second connection line. The control unit connects to the other IP telephone terminal so that the other IP telephone terminal can be a slave when the management server instructs to relay a call performed by the other IP telephone terminal. The spare connection is controlled to do so.

  Yet another aspect of the present invention is a system. The system includes a management server and a plurality of IP telephone terminals that are respectively connected to a communication network through different first connection lines and perform a call via the communication network.

The management server has an abnormality detection unit and a control unit.
The abnormality detection unit detects an abnormality of the first connection line corresponding to a predetermined IP telephone terminal among the plurality of IP telephone terminals.

  When the abnormality detecting unit detects an abnormality of the first connection line corresponding to the predetermined IP telephone terminal, the control unit is connected to the predetermined IP telephone terminal separately from the predetermined IP telephone terminal. Instruct at least one IP telephone terminal having a base unit function, which can be connected by a line, to relay a telephone call by the predetermined IP telephone terminal.

  When at least one IP telephone terminal is instructed by the management server to relay a call performed by the predetermined IP telephone terminal, the predetermined IP telephone terminal becomes a slave unit via the other connection line. The predetermined IP telephone terminal is connected by the separate connection line.

  Note that the IP telephone terminal and system in each aspect described above are replaced with devices and methods, and the program that causes the computer to execute processing by the IP telephone terminal or management server in each aspect described above are examples of aspects of the present invention. ,It is valid.

  According to the first aspect, it is possible to make a call from the IP telephone terminal to an arbitrary call partner even when an abnormality occurs in the communication line used by the IP telephone terminal during normal operation without going through the management server. . According to the second or third aspect, when an abnormality occurs in both the communication line that the IP telephone terminal normally uses and the connection line between the IP telephone terminal and the management server, A call from an IP telephone terminal to an arbitrary call partner is possible.

It is a figure which shows the IP telephone system concerning the 1st Embodiment of this invention. It is a figure which shows the IP telephone terminal in the IP telephone system shown in FIG. 2 is a flowchart showing an operation at the time of starting each IP telephone terminal in the IP telephone system shown in FIG. 3 is a flowchart showing the operation of each IP telephone terminal and SIP server after an abnormality of the first connection line of one IP telephone terminal is detected in the IP telephone system shown in FIG. It is a figure which shows the IP telephone terminal in the IP telephone system concerning the 2nd Embodiment of this invention. It is a flowchart which shows the operation | movement at the time of starting of each IP telephone terminal in the IP telephone system concerning the 2nd Embodiment of this invention. 6 is a flowchart showing an operation example of each IP telephone terminal and SIP server after an abnormality of the first connection line of one IP telephone terminal is detected in the IP telephone system according to the second exemplary embodiment of the present invention. . It is a figure which shows the IP telephone system concerning the 3rd Embodiment of this invention. It is a figure which shows the management server in the IP telephone system shown in FIG. It is a figure which shows the IP telephone terminal which relays the telephone call of the other IP telephone terminal in the IP telephone system shown in FIG. FIG. 9 is a flowchart showing an operation when each IP telephone terminal is activated in the IP telephone system shown in FIG. 8. FIG. FIG. 9 is a flowchart showing the operation of each IP telephone terminal, management server, and SIP server after an abnormality of the first connection line of one IP telephone terminal is detected in the IP telephone system shown in FIG. 8.

  Embodiments of the present invention will be described below with reference to the drawings. For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. Note that, in each drawing, the same element is denoted by the same reference numeral, and redundant description is omitted as necessary.

  Each element described in the drawings as a functional block for performing various processes can be configured by a CPU, a memory, and other circuits in terms of hardware, and a program loaded in the memory in terms of software. Etc. Therefore, it is understood by those skilled in the art that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof, and is not limited to any one. Note that, in each drawing, the same element is denoted by the same reference numeral, and redundant description is omitted as necessary.

  Further, the above-described program can be stored using various types of non-transitory computer readable media and supplied to a computer. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROM (Read Only Memory) CD-R, CD -R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory)). The program may also be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

<First Embodiment>
FIG. 1 shows an IP telephone system 100 according to a first embodiment of the present invention. The IP telephone system 100 performs voice communication using VoIP (Voice over Internet Protocol), and uses SIP (Session Initiation Protocol) as a session control protocol. SIP is a protocol usually known by those skilled in the art, and details thereof are omitted.

  As illustrated, the IP telephone system 100 includes a SIP server 110 and a plurality of IP telephone terminals (three in the illustrated example: 130A, 130B, and 130C), and the SIP server 110 and each IP telephone terminal communicate with each other. Each IP telephone terminal connected to the network 120 makes a call via the communication network 120 or the SIP server 110.

  IP phone terminal 130A, IP phone terminal 130B, and IP phone terminal 130C are connected to communication network 120 by routes RA, RB, and RC, respectively. Hereinafter, for each IP telephone terminal, the connection line connecting the IP telephone terminal and the communication network 120 is referred to as a first connection line of the IP telephone terminal. That is, the first connection lines of IP telephone terminal 130A, IP telephone terminal 130B, and IP telephone terminal 130C are RA, RB, and RC, respectively. In normal times, each IP telephone terminal is connected to the communication network 120 via its own first connection line.

  Each IP telephone terminal can be connected to other IP telephone terminals. Hereinafter, a line for connecting to another IP telephone terminal is referred to as a second connection line of the IP telephone terminal.

  As an example, it is assumed that a house where the IP phone terminal 130A and the IP phone terminal 103B are installed is in the vicinity, and a connection line XR is provided between them. The connection line XR is a second connection line for the IP telephone terminal 130A and a second connection line for the IP telephone terminal 130B. Note that the second connection line XR may be either wired or wireless.

  As an example, the second connection line is provided only between the IP telephone terminal 130A and one other IP telephone terminal (IP telephone terminal 130B). A second connection line may be provided between the two. The same applies to IP telephone terminal 130B.

  Further, it is assumed that IP telephone terminal 130C is remote from IP telephone terminals 130A and 130B, and neither of IP telephone terminal 130A nor IP telephone terminal 130B is provided with a second connection line.

  FIG. 2 shows IP telephone terminal 130A. Note that a SIP telephone terminal has one or both of a slave function and a master function, but in this embodiment, the IP telephone terminal 130A has at least a slave function. On the other hand, as will be described later, IP telephone terminal 130B has at least a master unit function.

  As shown in FIG. 2, IP telephone terminal 130 </ b> A includes SIP communication unit 140, information holding unit 142, abnormality detection unit 144, call unit 146, and standby connection unit 148.

  The SIP communication unit 140 is a functional block that performs communication by SIP. When the first connection line RA is normal, that is, when the first connection line RA is normal, the SIP communication unit 140 communicates with the SIP server 110 via the first connection line RA and the communication network 120. Various communications are performed.

  The information holding unit 142 holds information necessary for connecting to another IP telephone terminal via the second connection line of the IP telephone terminal 130A. Here, these pieces of information become information necessary for connecting to the IP telephone terminal 130B via the second connection line XR.

  When the second connection line XR is a wired line, the information held in the information holding unit 142 recognizes, for example, a spare I / F (not shown) connected to the IP telephone terminal 130A. Information, address information for identifying the IP telephone terminal 130B, and the like.

  When the second connection line XR is a wireless line, the information held in the information holding unit 142 can be, for example, an SSID (Service Set Identifier) or an encryption key.

  In the following, as an example, it is assumed that the second connection line XR is a wireless line, and the IP telephone terminal 130A and the IP telephone terminal 130B are connected by WiFi Direct at the time of connection. IP phone terminal 130A and IP phone terminal 130B both have a wireless AP (Access Point) function, and use the wireless AP function in normal times.

The abnormality detection unit 144 detects an abnormality such as a line disconnection with respect to the first connection line RA.
The call unit 146 is a functional block necessary for making a call, such as a dial unit or a speaker.

  The spare connection unit 148 does not operate when the first connection line RA is normal, and when the abnormality detection unit 144 detects an abnormality in the first connection line RA, the backup connection unit 148 uses the second connection line XR. Connection from IP telephone terminal 130A to IP telephone terminal 130B is executed.

  With reference to FIG. 3, an operation example at the time of activation of each IP telephone terminal will be described. At this time, the first connection line of each IP telephone terminal is normal, and each IP telephone terminal connects to the communication network 120 via its own first connection line, and the SIP server 110 via the communication network 120. Communicate with.

  First, the IP telephone terminal 130A registers its location information (telephone number, IP address, etc.) in the SIP server 110 using the SIP communication unit 140 (S1). In response to this, the SIP server 110 temporarily holds the location information of the IP telephone terminal 130A and sets a registration expiration date (location information holding period) for the IP telephone terminal 130A (S2).

  Similarly, the IP phone terminal 130B and the IP phone terminal 130C also register their own location information in the SIP server 110, and the registration expiration date is set by the SIP server 110 (S4 and S5, S6 and S7).

  IP telephone terminal 130A further holds information necessary for connecting to IP telephone terminal 130B via second connection line XR (S3). These pieces of information are input to the IP telephone terminal 130A by the user, for example.

  Thereafter, each IP telephone terminal makes a call via its first connection line, the SIP server 110, and the communication network 120.

  FIG. 4 shows an operation example of the SIP server 110 and each IP phone terminal when communication via the first connection line RA becomes impossible, such as when the first connection line RA of the IP phone terminal 130A is disconnected. It is a flowchart to show.

  As shown in FIG. 4, first, the abnormality detection unit 144 of the IP telephone terminal 130A detects an abnormality of the first connection line RA (S1).

  When the abnormality detection unit 144 detects an abnormality in the first connection line RA, the backup connection unit 148 of the IP telephone terminal 130A uses the information held in the information holding unit 142 to connect the second connection line XR. To the IP telephone terminal 130B (S2). Specifically, IP telephone terminal 130A turns off the wireless AP function, enables the wireless slave function by the WiFi Direct function, and wirelessly connects IP telephone terminal 130B via second connection line XR. Belongs to AP.

  As a result, IP telephone terminal 130A bypasses IP telephone terminal 130B and can secure a connection path to communication network 120.

  Next, IP telephone terminal 130A registers its location information in IP telephone terminal 130B. Since IP telephone terminal 130B has a parent device function, a registration expiration date is set for IP telephone terminal 130A in accordance with registration from IP telephone terminal 130A (S3, S4).

As a result, IP telephone terminal 130A becomes a slave of IP telephone terminal 130B, and calls to any call destination can be made.
For example, when the user inputs the telephone number of IP telephone terminal 130C using the dial part included in call section 146, the communication section of IP telephone terminal 130A sends the telephone number of IP telephone terminal 130C to IP telephone terminal 130B. Register (S5).

  In response, IP telephone terminal 130B responds to IP telephone terminal 130A in accordance with SIP (S6).

  Further, IP telephone terminal 130B registers the telephone number of the call destination (IP telephone terminal 130C in this case) registered by IP telephone terminal 130A in SIP server 110 (S7). In response to this, the SIP server 110 replies to the IP telephone terminal 130B (S8) and makes a call to the IP telephone terminal 130C (S9).

  Thereafter, a call is established between the IP telephone terminal 130A and the IP telephone terminal 130C that is the call destination via the SIP server 110 and the IP telephone terminal 130B through a reply from the IP telephone terminal 130C in accordance with SIP (S10). ~ S20).

  As described above, according to the IP telephone system 100 according to the first embodiment, an abnormality has occurred in the communication line (first connection line) normally used by the IP telephone terminal without using the management server. Sometimes, the IP telephone terminal can make a call to any other party.

<Second Embodiment>
The IP telephone system according to the second embodiment of the present invention is provided with IP telephone terminal 230A, IP telephone terminal 230B, and IP telephone terminal 230C instead of IP telephone terminal 130A, IP telephone terminal 130B, and IP telephone terminal 130C. Except for this point, it is the same as the IP telephone system 100.

  FIG. 5 shows an IP telephone terminal 230A in the IP telephone system according to the second embodiment. IP telephone terminal 230B and IP telephone terminal 230C have the same configuration as IP telephone terminal 230A.

  As shown in FIG. 5, IP telephone terminal 230 </ b> A further includes emergency contact address storage unit 240 as compared with IP telephone terminal 130 </ b> A. The emergency contact address storage unit 240 stores a telephone number of an emergency contact address.

  FIG. 6 is a flowchart showing an operation example when IP telephone terminal 230A, IP telephone terminal 230B, and IP telephone terminal 230C are activated. As shown in step S3 of FIG. 6, when the IP telephone terminal 230A is activated, the information holding unit 142 holds information necessary for connecting to the IP telephone terminal 230B via the second connection line XR. The telephone number of the emergency contact is stored in the emergency contact storage unit 240. The telephone number of this emergency contact is also input by the user, for example.

  Except for step S3, the flowchart shown in FIG. 6 is the same as the flowchart shown in FIG.

  FIG. 7 is a flowchart showing an operation example of the SIP server 110 and each IP telephone terminal after the abnormality detecting unit 144 of the IP telephone terminal 230A detects the abnormality of the first connection line RA. As shown in step S5 of FIG. 7, in the second embodiment, the IP telephone terminal 230A does not wait for an input by the user when an abnormality in the first connection line RA is detected, and performs SIP communication. Using unit 140, the telephone number of the emergency contact stored in emergency contact storage unit 240 is automatically registered in IP telephone terminal 130B. Except for step S5, the flowchart shown in FIG. 7 is the same as the flowchart shown in FIG.

  The IP telephone system according to the second embodiment is more convenient because it can automatically make a call to an emergency contact address when the connection line is abnormal in a normal state, in addition to the effect obtained by the IP telephone system 100. It is.

<Third Embodiment>
FIG. 5 shows an IP telephone system 300 according to the third embodiment of the present invention. Similar to the IP telephone systems according to the first and second embodiments, the IP telephone system 300 performs voice communication using VoIP, and uses SIP as a session control protocol.

  As illustrated, the IP telephone system 300 includes a SIP server 110, a management server 310, and a plurality of IP telephone terminals (three in the illustrated example: 330A, 330B, and 130C). Each IP telephone terminal is connected to the communication network 120. Each IP telephone terminal makes a call via the communication network 120 to the SIP server 110, and the management server 310 monitors information on the IP telephone terminal registered in the SIP server 110 via the communication network 120.

  IP telephone terminal 330A, IP telephone terminal 330B, and IP telephone terminal 130C are connected to communication network 120 by first connection line RA, first connection line RB, and first connection line RC, respectively. The IP phone terminal 330A and the IP phone terminal 330B are respectively installed in houses located in the vicinity of each other, and can be connected via the second connection line XR. Also in the present embodiment, as an example, it is assumed that the second connection line XR is a wireless line.

  Note that IP telephone terminal 130C is remote from IP telephone terminal 330A and IP telephone terminal 330B, and the second connection line is not provided between IP telephone terminal 330A and IP telephone terminal 330B. And

  IP phone terminal 330A does not include information holding unit 142, abnormality detection unit 144, and backup connection unit 148 provided in IP phone terminal 130A of IP phone system 100. Except for this point, the IP telephone terminal 330A is the same as the IP telephone terminal 130A.

  In the IP telephone system 300 according to the present embodiment, the management server 310 can detect an abnormality in the first connection line RA, and when detecting an abnormality in the first connection line RA, the communication network 120. Via IP, the IP telephone terminal 330B is instructed to relay a call performed by the IP telephone terminal 330A. Hereinafter, the instruction given to the IP telephone terminal 330B by the management server 310 is referred to as “relay instruction”.

  FIG. 9 shows the management server 310. As illustrated, the management server 310 includes an abnormality detection unit 312 and a control unit 314.

  The abnormality detection unit 312 is a functional block that detects the presence or absence of an abnormality in the first connection line RA with respect to the IP telephone terminal 330A. In the present embodiment, the abnormality detection unit 312 of the management server 310 holds information on the IP telephone terminal (IP telephone terminal 330A in this case) to be managed, and the IP telephone terminal 330A in the SIP server 110 By monitoring the registration information, it is detected whether there is an abnormality in the first connection line RA.

  Similar to a normal SIP server, the SIP server 110 sets a registration expiration date for an IP telephone terminal when accepting registration from the IP telephone terminal. When half of the period until the registration expiration date has passed, the IP telephone terminal is made to update registration. In response, when the IP telephone terminal updates the registration, the SIP server 110 sets a new registration expiration date for the IP telephone terminal. On the other hand, when the IP telephone terminal has not renewed the registration, the SIP server 110 deletes the registration of the IP telephone terminal at the time when the last registered validity period has passed.

  Therefore, the management server 310 monitors the registration information in the SIP server 110 for the IP phone terminal 330A to be managed, and when the registration of the IP phone terminal 330A is deleted by the SIP server 110, the first IP phone terminal 330A It can be determined that there is an abnormality in the connection line RA.

  When the abnormality detection unit 312 of the management server 310 monitors the registration information of the IP telephone terminal 330A in the SIP server 110 and determines that there is an abnormality in the first connection line RA, the abnormality detection unit 312 notifies the control unit 314 accordingly. To do.

  When the abnormality detection unit 312 notifies the abnormality of the first connection line RA from the abnormality detection unit 312, the control unit 314 instructs the other IP telephone terminal (in this case, the IP telephone terminal 330) having the base unit function to relay the IP telephone terminal 330A. Send. The relay instruction includes information for connecting to the IP telephone terminal 330A via the second connection line XR. The information is sent to the management server 310 in advance by the user of the IP telephone terminal 330A, for example. It is registered.

  FIG. 10 shows IP telephone terminal 330B. The IP telephone terminal 330B includes a SIP communication unit 140, a call unit 146, a spare connection unit 332, and a control unit 334. The SIP communication unit 140 and the call unit 146 are functional blocks similar to the SIP communication unit 140 and the call unit 146 of the IP phone terminal 130A of the IP phone system 100, respectively.

  The spare connection unit 332 is for connecting to the IP telephone terminal 330A via the second connection line XR and is controlled by the control unit 334.

  Upon receiving the relay instruction from the management server 310, the control unit 334 causes the backup connection unit 332 to connect to the IP telephone terminal 330A via the second connection line XR based on the relay instruction, and Control to make the terminal 330A belong as a slave unit is performed.

  With reference to FIG. 11, an example of the operation when each IP telephone terminal is activated will be described. At this time, the first connection line of each IP telephone terminal is normal, and each IP telephone terminal connects to the communication network 120 via its own first connection line, and the SIP server 110 via the communication network 120. And communicate with the management server 310. Note that illustration of the IP telephone terminal 130C is omitted due to space limitations.

  First, the IP telephone terminal 330A registers its own location information (telephone number, IP address, etc.) in the SIP server 110 via the first connection line RA and the communication network 120 (S1). In response to this, the SIP server 110 temporarily holds the location information of the IP telephone terminal 330A, and sets a registration expiration date (location information retention period) for the IP telephone terminal 330A (S2).

  Further, the IP telephone terminal 330A communicates with itself through the first connection line RA and the communication network 120, information indicating the presence / absence of the SIP base unit function, and the second connection line XR. Information for connection is registered in the management server 310 (S3). In response to this, the management server 310 holds the information registered from the IP telephone terminal 330A in a storage device (not shown) and sends a registered response to the IP telephone terminal 330A (S4). Here, as an example, it is assumed that IP telephone terminal 330A has registered in management server 310 so that it has only a SIP slave device function.

  Similarly, the IP telephone terminal 330B also registers its location information in the SIP server 110, and the registration expiration date is set by the SIP server 110 (S5, S6). In addition, IP telephone terminal 330B registers its own telephone number and information indicating that it has the SIP base unit function with respect to management server 310, and a registered response is made from management server 310 (S7). , S8).

  Although omitted in FIG. 11, the IP telephone terminal 130 </ b> C similarly registers with the SIP server 110 and the management server 310.

  Thereafter, each IP telephone terminal can make a call via its first connection line, the SIP server 110, and the communication network 120, and the abnormality detection unit 312 of the management server 310 monitors the registration information in the SIP server 110. Do.

  FIG. 12 shows the SIP server 110, the management server 310, and each IP phone when communication via the first connection line RA becomes impossible, such as when the first connection line RA of the IP telephone terminal 330A is disconnected. It is a flowchart which shows the operation example of a terminal. Also in this figure, illustration of the IP telephone terminal 130C is omitted. Note that the abnormality detection unit 312 of the management server 310 constantly monitors registration information in the SIP server 110.

  As shown in the figure, after the first connection line RA of the IP telephone terminal 330A is disconnected (S1), the registration information of the IP telephone terminal 330A is deleted from the SIP server 110 due to the expiration of the registration expiration date of the IP telephone terminal 330A. (S2).

  Since the abnormality detection unit 312 of the management server 310 constantly monitors the registration information in the SIP server 110, the SIP server 110 detects the deletion of the registration information of the IP telephone terminal 330A and detects the first connection of the IP telephone terminal 330A. It is determined that an abnormality has occurred in the line RA (S3).

  When the abnormality detection unit 312 determines that an abnormality has occurred in the first connection line RA, the control unit 314 of the management server 310 determines another IP telephone terminal that can relay the call of the IP telephone terminal 330A. To do. In the present embodiment, as an example, the abnormality detection unit 312 determines the installation positions of these IP telephone terminals from the telephone numbers of all IP telephone terminals managed by itself, and determines the installation positions of the IP telephone terminals 330A. An IP telephone terminal having a base unit function installed nearby is determined to be an IP telephone terminal that relays the call of IP telephone terminal 330A. Here, it is assumed that the abnormality detection unit 312 determines the IP telephone terminal 330B as the IP telephone terminal that relays the call of the IP telephone terminal 330A. Therefore, the control unit 314 of the management server 310 transmits a relay instruction to the IP telephone terminal 330B (S4). This relay instruction includes information for connecting to the IP telephone terminal 330A via the second connection line XR.

  When the IP telephone terminal 330B receives the relay instruction from the management server 310, the IP telephone terminal 330B replies to the management server 310 (S5), and uses the information included in the relay instruction, for example, the second connection line by a function such as WiFi Direct. It connects to IP telephone terminal 330A via XR and belongs to the wireless AP of IP telephone terminal 330A (S6).

  As a result, a connection path to the communication network 120 can be secured by bypassing the IP telephone terminal 330B with respect to the IP telephone terminal 330A.

  Next, IP phone terminal 330A registers its location information in IP phone terminal 330B, and a registration expiration date is set from IP phone terminal 330B (S7, S8).

As a result, IP telephone terminal 330A becomes a slave unit of IP telephone terminal 330B, and can make a call to an arbitrary call destination.
For example, when the telephone number of the IP telephone terminal 130C is input, the IP telephone terminal 330A registers the telephone number of the IP telephone terminal 130C with the IP telephone terminal 330B (S9).

  In response, IP telephone terminal 330B responds to IP telephone terminal 330A in accordance with SIP (S10).

  IP telephone terminal 330B registers the telephone number of the call destination (IP telephone terminal 130C in this case) registered by IP telephone terminal 330A in SIP server 110 (S11). In response to this, the SIP server 110 replies to the IP telephone terminal 330B (S12) and makes a call to the IP telephone terminal 130C (not shown).

  Thereafter, a call is made between IP telephone terminal 330A and call destination IP telephone terminal 130C via SIP server 110 and IP telephone terminal 330B through a reply (not shown) of IP telephone terminal 130C in accordance with SIP. Established (S13 to S19).

  Thus, according to IP telephone system 300 according to the present embodiment, the communication line (first connection line RA) that is normally used by the IP telephone terminal and the connection between the IP telephone terminal and the management server When an abnormality occurs in both the line (in this embodiment, the first connection line RA that is the same as the communication line that the IP telephone terminal normally uses), an arbitrary call can be made from the IP telephone terminal. A call to the other party is possible.

  The present invention has been described above based on the embodiment. The embodiment is an exemplification, and various modifications, increases / decreases, and combinations may be made to the above-described embodiments without departing from the gist of the present invention. It will be understood by those skilled in the art that modifications in which these changes, increases / decreases, and combinations are also within the scope of the present invention.

  For example, in the IP telephone system 300, the management server 310 determines the installation position of each IP telephone terminal from the telephone number of each IP telephone terminal, and the IP telephone terminal in which an abnormality has occurred in the first connection line that is normally used The IP telephone terminal that relays the call is determined. For example, for each IP telephone terminal, information of another IP telephone terminal that relays its own call when an abnormality occurs in its own first connection line may be registered in the management server 310 in advance.

  In the IP telephone system 300, the management server 310 determines only one IP telephone terminal as a relay terminal for the IP telephone terminal 330A when the first connection line is abnormal with respect to the IP telephone terminal 330A. Alternatively, a plurality of IP telephone terminals capable of relaying a call of IP telephone terminal 330A may be determined, and a relay instruction may be issued to the plurality of IP telephone terminals. In this case, IP telephone terminal 330A may perform a call via any one of a plurality of IP telephone terminals connected via a protection line.

  Further, in the IP telephone system 300, each IP telephone terminal is connected to the management server 310 via its own first connection line, but the line connecting the IP telephone terminal and the management server 310 is A line different from the line connecting the IP telephone terminal and the SIP server 110 may be used. In this case, the IP telephone terminal management server 310 and the connection line in addition to the line (first connection line) connected to the communication network 120 to the SIP server 110 of the IP telephone terminal are disconnected. A call from a telephone terminal to an arbitrary call destination is possible.

DESCRIPTION OF SYMBOLS 100 IP telephone system 110 SIP server 120 Communication network 130A IP telephone terminal 130B IP telephone terminal 130C IP telephone terminal 140 SIP communication part 142 Information holding part 144 Abnormality detection part 146 Calling part 148 Preliminary connection part 230A IP telephone terminal 230B IP telephone terminal 230C IP phone terminal 300 IP phone system 310 Management server 312 Abnormality detection unit 314 Control unit 330A IP phone terminal 330B IP phone terminal 332 Preliminary connection unit 334 Control unit RA First connection line RB First connection line RC First connection line XR second connection line

Claims (4)

An IP telephone terminal that is compliant with SIP (Session Initiation Protocol), is connected to a communication network through a first connection line in a normal state, and makes a call by communicating with a SIP server connected to the communication network,
An abnormality detection unit for detecting an abnormality of the first connection line;
An information holding unit for holding information necessary for connecting to another IP telephone terminal having a base unit function via the second connection line;
When detecting an abnormality of the first connecting line by the abnormality detection unit, connected to said other IP telephone terminal via the second connecting line using the information held by the information holding unit In addition, by registering its own location information in the other IP telephone terminal, it becomes a slave unit of the other IP telephone terminal, thereby making a call by communicating with the SIP server via the other IP telephone terminal. An IP telephone terminal characterized by An emergency contact storage unit for storing the telephone number of the emergency call destination is further provided,
When the abnormality of the first connection line is detected by the abnormality detection unit, the other IP telephone is registered by registering the telephone number stored in the emergency contact storage unit in the other IP telephone terminal. IP telephone terminal according to claim 1, characterized in that making a call to the emergency contact via a terminal and a SIP server. An IP telephone terminal that conforms to SIP (Session Initiation Protocol), is connected to a management server, is connected to a communication network via a first connection line, and has a parent device function,
A spare connection unit for connecting to another IP telephone terminal via the second connection line;
When an instruction to relay a call performed by the other IP telephone terminal is issued from the management server, the registration of location information from the other IP telephone terminal is accepted and the other IP line is received via the second connection line. as can be IP telephone terminal becomes handset, IP telephone terminals that feature in that it comprises a control unit for controlling the backup connection unit to connect with the other IP telephone terminal. A management server,
A plurality of IP telephone terminals respectively connected to a communication network via different first connection lines and performing a call via the communication network;
SIP (Session Initiation Protocol) server ,
The management server
An abnormality detection unit that detects an abnormality of the first connection line corresponding to a predetermined IP telephone terminal among the plurality of IP telephone terminals by monitoring registration information of the SIP server ;
A parent that can be connected to the predetermined IP telephone terminal through a different connection line among the plurality of IP telephone terminals when an abnormality of the first connection line corresponding to the predetermined IP telephone terminal is detected; A control unit for instructing at least one IP telephone terminal provided with a function to relay a telephone call performed by the predetermined IP telephone terminal;
The at least one IP telephone terminal is
The predetermined IP telephone terminal can be a slave unit via the another connection line when the management server instructs to relay a call performed by the predetermined IP telephone terminal. A system characterized by connecting to an IP telephone terminal.

Images