JP2005039565A - Ip telephone network and call detouring method used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an IP telephone network which allows services to be performed between bases without user's paying his or her attention to an outside line number even in the case that communication between the bases is impossible. <P>SOLUTION: Extension number-outside line number tables 16, 26, and 36 wherein extension numbers including extension numbers between the bases 1 to 3 and outside line numbers corresponding to them are stored are arranged in each of bases 1 to 3 correspondingly to a communication control device 11 and communication control devices 21 and 31 for backup. In the case that normal extension calls between the bases 1 to 3 are impossible due to the occurrence of a fault of the IP network 100, the communication control device 11 and communication control devices 21 and 31 for backup respectively switch the extension calls between the bases 1 to 3 to connections passing a line switching network 200 on the basis of information of extension numbers-outside line numbers preliminarily set in the extension number-outside line number tables 16, 26, and 36. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an IP telephone network and a call detour method used therefor, and more particularly to a detour method when a failure occurs in an IP (Internet Protocol) telephone network.

  Conventionally, in this type of IP telephone network, as shown in FIG. 5, bases 5 to 7 are connected by an IP network 100 and a circuit switching network 200. Here, the IP network 100 is a network that performs communication of IP packets between the bases 5 to 7, and the circuit switching network 200 is a public line that is used when a local line is transmitted and a local line is received.

  The communication control device 51 controls each of the IP telephones 54, 55, 64, 65, 74, 75 and the IP-line switching conversion devices 52, 62, 72 at the bases 5-7. The backup communication control devices 61 and 71 periodically communicate with the communication control device 51 of the base 5 serving as a reference, and if the communication with the communication control device 51 can be normally performed, the backup communication control devices 61 and 71 do not perform the main operation as a device. However, if the backup communication control devices 61 and 71 cannot normally communicate with the communication control device 51, the IP terminals 64, 65, 74, and 75 and the IP-line switching conversion devices 62 and 72 in the bases 6 and 7 are used. To control extension calls within the bases 6 and 7 and outgoing / incoming calls to the office lines.

  The IP-circuit switching converters 52, 62, and 72 perform mutual conversion between voice information on the IP packet and voice information on the circuit switching. The call processing of these IP-line switching conversion devices 52, 62, 72 is controlled by the communication control device 51.

  In the bases 6 and 7, if the IP-circuit switching conversion device 62 cannot normally communicate with the communication control device 51, it is controlled by the backup communication control device 61. Similarly, if the IP-line switching conversion device 72 cannot normally communicate with the communication control device 51, it is controlled by the backup communication control device 71.

  The routers 53, 63, and 73 are installed between the network in each of the bases 5 to 7 and the IP network 100, and route IP packets that cross between the bases 5 to 7.

  IP telephones 54, 55, 64, 65, 74, and 75 are telephones having an IP interface, and convert analog voice information from the receiver into IP packets, or convert voice information received by IP packets into analog packets and send them to the receiver. The call processing of these IP telephones 54, 55, 64, 65, 74, 75 is normally controlled by the communication control device 51.

  However, the IP telephones 64 and 65 installed at the site 6 are controlled by the backup communication control device 61 installed within the site 6 if communication with the communication control device 51 cannot be performed normally. Similarly, the IP telephones 74 and 75 installed at the site 7 are controlled by the backup communication control device 71 installed within the site 7 if communication with the communication control device 51 cannot be performed normally.

JP 2000-349901 A JP 2000-354071 A

  However, in the above-described conventional IP telephone network, when communication of IP packets cannot be performed between bases due to failure of the IP network or the like, an extension call between bases cannot be performed. There is a problem that a call must be made by calling the outside line after checking the outside line number of the other party.

  Therefore, an object of the present invention is to solve the above-mentioned problems, and even when communication between bases becomes impossible, an IP telephone network and a user can make a call between the bases without being aware of the external line number and The object is to provide a call detouring method used for this purpose.

  The IP telephone network according to the present invention is based on an IP (Internet Protocol) terminal installed in each base and an IP-circuit switching converter for connecting the bases via the circuit switching network during normal operation. The communication control device at the base is controlled, and the call between the bases is connected to the extension via the IP network, and the IP terminal and the IP-circuit switching converter in the base other than the reference base when a failure occurs Is an IP telephone network that is controlled by a backup communication control device, and is an extension number set in advance when an extension connection via the IP network is not possible for a call that is arranged at each base and straddles between the bases -Sending an outside line via the IP-line switching conversion device based on the outside line number information and sending the line switching line And a means for connecting the base via network.

  The call detouring method according to the present invention is based on an IP (Internet Protocol) terminal installed in each base and an IP-circuit switching converter for connecting the bases via a circuit switching network during normal operation. The communication control device of the base is controlled, the call between the bases is connected to the extension via the IP network, and the IP terminal and the IP-circuit exchange conversion device in the base other than the reference base when a failure occurs Is a call detour method for an IP telephone network that is controlled by a backup communication control device, and is set in advance at each of the sites when an extension connection via the IP network is not possible for a call across the sites. Based on the extension number-external line number information, an external line is transmitted via the IP-line switching converter and the line is transmitted. Connecting between said bases via conversion network.

  That is, in the IP telephone network of the present invention, during normal operation, the communication control device at the base controls the IP telephones and IP-circuit switching converters installed in each base, and calls between bases are made IP In a system in which an extension is connected via a network and an IP telephone and an IP-line switching converter in a base other than the base are controlled by a backup communication control device when a failure occurs, In the situation where the extension connection via the IP network is not possible, an outside line is transmitted via the IP-line switching conversion device using the preset extension number-outside number table, and the bases are connected via the circuit switching network. It is possible to make a call between them and avoid a situation in which the call cannot be made.

  More specifically, in the IP telephone network of the present invention, in a situation where extension calls between bases are not possible, a backup communication control device in a base other than the base base is set in advance extension number-external line Based on the contents of the number table, connection via a circuit switching network is automatically performed for extension calls between bases.

  In a conventional IP telephone network, an IP telephone and an IP-circuit switching converter installed in a base other than the reference base normally communicate with the communication control device in the reference base due to an IP network failure or the like. If this is not possible, the backup communication control device controls each device in the base other than the base base, making it possible to make internal calls within the base and to make and receive calls on the office line. No extension connection is possible.

  On the other hand, in the IP telephone network of the present invention, even if the communication between the bases becomes impossible due to failure of the IP network or the like, the extension communication number-external line number in which the backup communication control device of each base is preset. Since connections are made via a circuit-switched network using a table, even if a failure occurs in the IP network and communication between bases via the IP network becomes impossible, the user is not aware of the external line number and is not aware of the external line number. Can be called.

  The present invention is configured and operated as described below, so that even if communication between bases becomes impossible, the user can make a call between the bases without being aware of the external line number. Is obtained.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an IP (Internet Protocol) telephone network according to an embodiment of the present invention. Referring to FIG. 1, the IP telephone network according to the embodiment of the present invention corresponds to each of the bases 1 to 3 corresponding to the communication control device 11 and the backup communication control devices 21 and 31 provided in the bases 1 to 3, respectively. Similar to the conventional IP telephone network shown in FIG. 4 except that an extension number-external number table 16, 26, 36 for storing an extension number including an extension number between them and an external number corresponding thereto is provided. It becomes the composition of.

  If the communication control device 11 and the backup communication control devices 21 and 31 each fail in the IP network 100 and cannot normally perform extension calls between the bases 1 to 3, the extension number / external number tables 16 and 26 are stored in advance. , 36, the extension call between the bases 1 to 3 is switched to the connection via the circuit switching network 200 based on the extension number-external line number information set in.

  As a result, in the embodiment of the present invention, even when the communication between the bases cannot be performed due to the failure of the IP network 100 or the like, the communication control device 11 and the backup communication control devices 21 and 31 have the extension number-external number. By making a connection via the circuit switching network 200 based on the contents stored in the tables 16, 26, and 36, the user can make a call between bases without being aware of the external line number.

  FIG. 2 is a flowchart showing the operation of the communication control apparatus according to one embodiment of the present invention, and FIG. 3 is a flowchart showing the operation of the backup communication control apparatus according to one embodiment of the present invention. Since an IP telephone network according to an embodiment of the present invention has the same configuration as that of the embodiment of the present invention shown in FIG. 1, an embodiment of the present invention will be described with reference to FIGS. .

  As shown in FIG. 1, an IP telephone network according to an embodiment of the present invention is configured by connecting bases 1 to 3 with an IP network 100 and a circuit switching network 200. Here, the IP network 100 is a network that performs communication of IP packets between the bases 1 to 3, and the circuit-switched network 200 is a public line that is used when a local line is transmitted and a local line is received.

  In the base 1 serving as a reference, a communication control device 11, an IP-line switching conversion device 12, a router 13, IP telephones 14 and 15, and an extension number-external number table 16 are arranged. Instead of the IP telephones 14 and 15, an IP terminal [for example, an information terminal such as a personal computer or a PDA (Personal Digital Assistant)] that performs IP communication may be used.

  In the bases 2 and 3 which are not the standard, backup communication control devices 21 and 31, IP-line switching conversion devices 22 and 32, routers 23 and 33, IP telephones 24, 25, 34 and 35, and extensions Number-outline number tables 26 and 36 are provided, respectively. Instead of the IP telephones 24, 25, 34, and 35, IP terminals [for example, information terminals such as personal computers and PDAs] that perform IP communication may be used.

  The communication control device 11 controls the IP telephones 14, 15, 24, 25, 34, 35 and the IP-line switching conversion devices 12, 22, 32 at the bases 1 to 3 (step S1 in FIG. 2). In addition, when the IP network 100 cannot communicate with the bases 2 and 3 due to a failure or the like (step S2 in FIG. 2), the communication control device 11 uses the extension number for the extension call between the base 1 and the bases 2 and 3 Switching to connection via the circuit switching network 200 based on the contents preset in the outside line number table 16 (step S3 in FIG. 2).

  The backup communication control devices 21 and 31 periodically communicate with the communication control device 11 (step S11 in FIG. 3). If the communication control device 11 and the communication control device 11 can communicate normally (step S12 in FIG. 3), the backup communication control devices 21 and 31 perform the main operation as a device. Returning to step S11, periodic communication with the communication control device 11 is performed.

  On the other hand, if the backup communication control devices 21 and 31 cannot communicate normally with the communication control device 11 (step S12 in FIG. 3), the IP terminals 24, 25, 34, and 35 in the bases 2 and 3 and the IP line Exchange converters 22 and 32 are controlled to control extension calls within bases 2 and 3 and outgoing and incoming calls to the office line (step S13 in FIG. 3).

  When the backup communication control devices 21 and 31 cannot make an extension call between the bases 1 to 3 (step S14 in FIG. 3), line switching is performed based on the contents set in advance in the extension number / outline number tables 26 and 36. The connection is automatically switched to the connection via the network 200 (step S15 in FIG. 2).

  The IP-circuit switching converters 12, 22, and 32 perform mutual conversion between voice information on IP packets and voice information on circuit switching, and their call processing is controlled by the communication controller 11.

  However, when the communication with the communication control device 11 cannot be normally performed, the IP-circuit switching conversion device 22 installed at the site 2 is controlled by the backup communication control device 21. Similarly, the IP-circuit switching conversion device 32 installed at the site 3 is controlled by the backup communication control device 31 when the communication with the communication control device 11 cannot be performed normally.

  The routers 13, 23, and 33 are installed between the network in each of the bases 1 to 3 and the IP network 100, and route IP packets that cross between the bases 1 to 3.

  IP telephones 14, 15, 24, 25, 34, and 35 are telephones having an IP interface, and analog voice information from a receiver (not shown) is converted to IP packets, or voice information received by IP packets is converted to analog and used as a receiver. The communication control device 11 normally controls the transmission and the call processing.

  However, the IP telephones 24 and 25 installed at the site 2 are controlled by the backup communication control device 21 installed within the site 2 when communication with the communication control device 11 cannot be performed normally. Similarly, the IP telephones 34 and 35 installed at the site 3 are controlled by the backup communication control device 31 installed within the site 3 when communication with the communication control device 11 cannot be performed normally.

  Although the present embodiment has the above-described configuration, the configuration and operation of the IP network 100, the circuit switching network 200, and the routers 13, 23, and 33 are well known to those skilled in the art. Are not directly related to each other, and detailed description of their configuration and operation is omitted.

  Next, the operation of the call detour method in the IP telephone network according to the present embodiment will be described. The communication control device 11 is registered as the first priority communication control device in the IP telephones 14 and 15 and the IP-line switching conversion device 12 installed in the base 1 serving as a reference.

  In the IP telephones 24 and 25 and the IP-line switching conversion device 22 installed at the base 2, the communication control device 11 is registered as the first priority communication control device, and the backup communication control device 21 as the second priority communication control device. Is registered.

  Similarly, the communication control device 11 is registered as the first priority communication control device and the communication control device as the second priority communication control device in the IP telephones 34 and 35 and the IP-line switching conversion device 32 installed at the base 3. 31 is registered.

  In this state, when each device in the bases 1 to 3 and the IP network 100 are operating normally, the IP telephones 14, 15, 24, 25, 34, 35 and the IP-line switching converters 12, 22, 32 are provided. Selects the communication control device 11 as the communication control device to be connected, the call processing is controlled by the communication control device 11, and the extension connection between the bases 1 to 3 is performed via the IP network 100.

  In addition, with respect to the outgoing and incoming calls of the office line, the IP-line connection converters 12, 22, and 32 installed in the same base 1 to 3, or the IP- installed in another base via the IP network 100. This is done using a circuit switched converter.

  Next, a case where a failure has occurred in the IP network 100 will be described. Due to the failure of the IP network 100, the bases 1 to 3 cannot communicate with each other via the IP network 100 between the bases 1 to 3.

  In this case, the IP telephones 24 and 25 and the IP-circuit switching converter 22 installed at the site 2, and the IP telephones 34 and 35 and the IP-circuit switching converter 32 installed at the site 3 are installed at the site 1. It becomes impossible to communicate with the existing communication control device 11.

  Therefore, the IP telephones 24 and 25 and the IP-line switching conversion device 22 installed at the site 2 select the backup communication control device 21 as the communication control device to be connected, and are controlled by the backup communication control device 21.

  Similarly, the IP telephones 34 and 35 and the IP-circuit switching converter 32 installed at the base 3 select the backup communication control device 31 as the communication control device to be connected, and are controlled by the backup communication control device 31. The

  In this state, the IP telephones 14, 15, 24, 25, 34, 35 and the IP-line switching converters 12, 22, 32 installed in the bases 1 to 3 are respectively the communication control device 11 and the backup communication. Controlled by the control device 21 and the backup communication control device 31, the extension connection to the office lines via the extension connections in the bases 1 to 3 and the IP-line switching converters 12, 22, and 32 installed in the bases. Incoming calls are possible, and extension connection between bases via the IP network 100 is not possible.

  In this state, for example, a case where a call is made from the IP telephone 14 installed at the base 1 to the IP telephone 35 installed at the base 3 will be described. The communication control apparatus 11 receives a call request from the IP terminal 14 to the IP terminal 35, but cannot issue an incoming call instruction to the IP terminal 35 because a failure has occurred in the IP network 100.

  Therefore, the communication control apparatus 11 checks the external line number of the IP terminal 35 based on the contents registered in advance in the extension number-external line number table 16, and sends the external line number of the IP telephone 35 to the IP-line switching conversion apparatus 12. Instructs to make a call.

  This outgoing call arrives at the IP-circuit switching conversion device 32 installed at the base 3, and the IP-circuit switching conversion device 32 notifies the backup communication control device 31 of the incoming call, and the backup communication control device 31. After confirming that the IP telephone 35 is free, it issues an incoming call instruction.

  As a result, a series of calls from the IP telephone 14 to the IP-circuit switching conversion apparatus 12, the circuit switching network 200, the IP-circuit switching conversion apparatus 32, and the IP telephone 35 is set. You will be able to make a call. Note that the backup communication control devices 21 and 31 perform the same control as the communication control device 11 described above and switch to the connection via the circuit switching network 200 when the extension connection between the bases occurs.

  As described above, in this embodiment, the communication control device 11 and the backup communication control devices 21 and 31 are set in advance in the extension number / external number table 16, 26 and 36 in a state where communication between bases is not possible. Connection can be established via the circuit switching network 200 by checking the external line number of the other party's IP telephone from the internal line number based on the contents and transmitting the external line. Therefore, in this embodiment, a user of an IP telephone can make a call between bases without being aware of the external line number of the other party.

  FIG. 4 is a block diagram showing the configuration of an IP telephone network according to another embodiment of the present invention. In FIG. 4, in another embodiment of the present invention, a backup communication control device 41 is installed in the base 4 serving as a reference, and the extension number / external number table 16 is connected to the backup communication control device 41. Except for the above, the configuration is the same as that of the IP telephone network according to the embodiment of the present invention shown in FIG. 1, and the same components are denoted by the same reference numerals. The operation of the same component is the same as that of the above-described embodiment of the present invention.

  In the above-described embodiment of the present invention, when communication between the bases 1 to 3 via the IP network 100 becomes impossible at each of the bases 1 to 3 due to a failure of the IP network 100, the communication control device 11 is connected to the IP telephone in the base 1. 14 and 15 and the IP-circuit switching conversion device 12 are controlled. In another embodiment of the present invention, the backup communication control device 41 is connected to the IP telephones 14 and 15 and the IP-circuit switching conversion device in the base 1. 12 control is performed.

  Therefore, in this embodiment, in addition to the effects of the above-described embodiment of the present invention, not only the IP network 100 but also the communication control device 11 has a failure, the IP installed in the base 1 There is an effect that the telephones 14 and 15 and the IP-circuit switching converter 12 can be controlled.

It is a block diagram which shows the structure of the IP telephone network by embodiment of this invention. It is a flowchart which shows operation | movement of the communication control apparatus by one Example of this invention. It is a flowchart which shows operation | movement of the communication control apparatus for backup by one Example of this invention. It is a block diagram which shows the structure of the IP telephone network by the other Example of this invention. It is a block diagram which shows the structure of the conventional IP telephone network.

Explanation of symbols

1-3 bases
11 Communication control device 12, 22, 32 IP-circuit exchange conversion device 13, 23, 33 Router 14, 15, 24,
25, 34, 35 IP telephone 16, 26, 36 Extension number-outer line number table 21, 31, 41 Backup communication control device
100 IP network
200 circuit switched network

Claims (6)

  During normal operation, the communication control device of the base serving as a reference controls an IP (Internet Protocol) terminal installed in each base and an IP-circuit switching converter for connecting the bases via a circuit switching network. In addition, the call between the bases is connected to the extension via the IP network, and when a failure occurs, the IP terminal and the IP-line switching converter in the base other than the reference base are controlled by the backup communication control device. An IP telephone network that is arranged at each of the bases and based on extension number-external number information set in advance when an extension connection via the IP network is not possible for a call across the bases An outside line is transmitted via an IP-circuit switching converter and the bases are connected via the circuit switching network. IP telephone network, characterized in that it comprises a stage. An extension number-external number table that stores the extension number-external number information in advance at each of the locations;
When the extension connection via the IP network is not possible, the base communication control device and the backup communication control device connect the bases via the circuit switching network using the extension number-outline number table. The IP telephone network according to claim 1, wherein: An extension number-external number table that stores the extension number-external number information in advance at each of the locations;
The backup communication control device is disposed at all the bases,
The backup communication control device at each of the bases connects the bases via the circuit switching network using the extension number-external number table when the extension connection via the IP network is impossible. 1. The IP telephone network according to 1.   During normal operation, the communication control device of the base serving as a reference controls an IP (Internet Protocol) terminal installed in each base and an IP-circuit switching converter for connecting the bases via a circuit switching network. In addition, the call between the bases is connected to the extension via the IP network, and when a failure occurs, the IP terminal and the IP-line switching converter in the base other than the reference base are controlled by the backup communication control device. The IP telephone network call detouring method is based on extension number-external number information that is set in advance at each of the sites when an extension connection via the IP network is not possible for a call across the sites. To the outside via the IP-circuit-switching converter and to the base via the circuit-switching network. Call detour wherein the connecting between.   An extension number in which the communication control device and the backup communication control device at the reference site are disposed at each site and store the extension number-external number information in advance when extension connection via the IP network is not possible 5. The call detouring method according to claim 4, wherein the bases are connected via the circuit switching network using an outside line number table. When the extension connection via the IP network is not possible, the backup communication control device provided at all the bases is provided at the respective bases and stores the extension number-external number information in advance. 5. The call detouring method according to claim 4, wherein the bases are connected via the circuit switching network using a number table.

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