KR100417118B1 - Intelligent Phone Exchange System - Google Patents

Abstract

The present invention assigns each extension number to a telephone in an area separated from each other, and exchanges a call received according to the extension number with a corresponding telephone through an Internet Protocol network (hereinafter referred to as an IP network). An intelligent telephone exchange system for automatically exchanging a corresponding telephone through a PSTN in case of failure of the IP network, the system comprising at least one IP telephone and at least one telephone; A private branch exchange network connected to an external public switched telephone network (PSTN) for exchanging incoming and outgoing signals of the IP telephone and the landline telephone; A gateway connected to an Internet Protocol (IP) network to perform a routing function in IP telephony and data communication; A gatekeeper connected to the IP network to monitor the state and operation of the gateway to perform a control function according to an intelligent telephone exchange; A landline telephone connected to the public telephone network and serving as a voice communication terminal between subscribers; A mobile communication terminal between subscribers wirelessly connected to a mobile communication network associated with the public telephone network; Integrate connectable voice communication means in isolated area into one local area telephone exchange network, and exchange the incoming call to the telephone by IP telephone number via IP network, and call route of corresponding IP telephone number When the quality of the call does not exceed the standard value because of congestion over the standard value, it is characterized in that it is automatically exchanged with a landline telephone number via the public telephone network.

Description

Intelligent Phone Exchange System {Intelligent Phone Exchange System}

The present invention relates to a telephone exchange system, and more particularly, an extension number is assigned to a telephone in a region separated from each other, and a call received according to the extension number is referred to as an Internet Protocol network (hereinafter referred to as an IP network). It is related to the intelligent telephone exchange system that exchanges the telephone through the PSTN in case of failure of the IP network.

While wired telephones have been the voice communication means of connecting isolated areas for hundreds of years, they are shrinking considerably due to the universalization of mobile communication systems and the emergence of voice and video calls over the Internet.

Nevertheless, most homes and businesses use landline telephones because they offer low communication rates and good communication conditions. In particular, many telephones, such as companies, connect to one private exchange and communicate through extension numbers. It will be used as the main voice communication means for the time being.

A communication network configured for voice communication of such wired telephone subscribers is generally called a public switched telephone network (PSTN), and recently, a mobile communication network is connected with the PSTN for convenience of wired and wireless telephone subscribers.

However, the above-described conventional telephone exchange system has a disadvantage in that the telephones in the separated areas cannot be bundled into one switching network because only adjacent telephones are connected. It is very convenient to connect the main office and branch of the same company to one exchange network, but the conventional technology does not provide such convenience.

The present invention has been made to solve the above-mentioned problems, regardless of whether the phone is locally adjacent or isolated telephones are integrated into a single telephone exchange network, each assigned an extension number, and the telephones in the areas separated from each other through the extension number also the internal call Its purpose is to provide an intelligent telephone exchange system for performing the above-mentioned.

Another object of the present invention is to provide an intelligent telephone exchange system for exchanging by connecting to each other via a PSTN in the event of an unexpected failure during the connection of telephones in separate areas to the IP network.

1 is a block diagram showing the configuration of an intelligent telephone exchange system according to the present invention;

2 is a flowchart showing the operation of the intelligent telephone exchange system according to the present invention.

3 is a flow chart illustrating in detail the adjacent gateway assignment step of FIG.

4 is a flow chart showing in detail the corresponding gateway assignment step of FIG.

5 is a flow chart showing in detail the addressing step of FIG.

<Description of the symbols for the main parts of the drawings>

10: A local telephone line 20: B local telephone line

30: C local telephone line 40: IP network

50: routing server 60: PSTN

The present invention for achieving the above object is at least one IP telephone and at least one telephone; A private branch exchange network connected to an external public switched telephone network (PSTN) for exchanging incoming and outgoing signals of the IP telephone and the landline telephone; A gateway connected to an Internet Protocol (IP) network to perform a routing function in IP telephony and data communication; A gatekeeper connected to the IP network to monitor the state and operation of the gateway to perform a control function according to an intelligent telephone exchange; A landline telephone connected to the public telephone network and serving as a voice communication terminal between subscribers; A mobile communication terminal between subscribers wirelessly connected to a mobile communication network associated with the public telephone network; Integrate connectable voice communication means in isolated area into one local area telephone exchange network, and exchange the incoming call to the telephone by IP telephone number via IP network, and call route of corresponding IP telephone number When the quality of the call does not exceed the standard value because of congestion over the standard value, it is characterized in that it is automatically exchanged with a landline telephone number via the public telephone network.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of an intelligent telephone exchange system according to the present invention. The first telephone line 10 and the second local telephone line 20, which are voice communication means for performing IP communication, and an Internet protocol method are shown in FIG. IP network 30 for transmitting and receiving a predetermined signal, and the incoming and outgoing signals of the first and second telephone lines are monitored to exchange to the PSTN network when the telephone exchange through the IP network is difficult. Gate-Keeper (50) is provided to control the loss.

Herein, the first and second telephone lines 10 and 20 include a plurality of telephones 16 and 16, a private branch exchange (hereinafter referred to as a PBX) 14 and 24, Each of the gateways 12 and 22 performs a routing function.

On the other hand, the PBX (14, 24) is connected to an external wired telephone 80 through a wired telephone network, that is, a PSTN (50), respectively, and connected to the mobile telephone 70 through a mobile communication network 60, respectively do.

Let us look at the detailed configuration of each intelligent telephone exchange system.

The first and second telephone lines 10 and 20 may be connected to a single private branch office switching network regardless of whether they are adjacent to each other or are separated from each other. The switching network may be referred to as a public switched telephone network (hereinafter referred to as a PSTN). And through this PSTN.

The IP network 30 is a network using an Internet protocol, and can perform telephone communication and internet communication through the IP network.

The gatekeeper 40 monitors and manages an exchange function and a state of the gateways 12 and 22 during voice telephony communication through the gateway.

For reference, the gatekeeper 40 1) a component of an H.323 video conferencing system that performs call address analysis, connection admission control, subnet bandwidth management, and the like. 2) Communication: An H.323 entity on the LAN that provides address translation and LAN access control to H.323 terminals and gateways. The gatekeeper manages the device registry in the multimedia network, and devices register with the gatekeeper at startup and request approval from the gatekeeper for calls.

Here, the gateways 12 and 22 support H.323 of the ITU-T, which is a communication protocol of the International Telecommunication Union (ITU), which is used for the development and rational use of the telecommunication field. It is an international organization that promotes cooperation and promotes the efficiency and use of telecommunication services.

In addition, since the gatekeeper 40 secures all the information of the gateways 12 and 22, the gatekeeper 40 can perform user authentication, routing management, gateway state management telephone connection, call recording, and illegal gateway blocking.

In addition, the gateway refers to a routing device in an IP network, but nowadays, it also refers to a node that performs this function. In this case, the term router is used, and the term gateway is used in the application layer. Refers to a special purpose device that converts information from one protocol stack to another.

The gateway applied in this embodiment is an IP telephony gateway for voice signal and facsimile signal, and it is possible to connect up to 8 telephony terminal devices, and has 100% compatibility with all domestic exchanges.

In addition, it is connected to the gateway of the designated telecommunications provider so that it is possible to make inexpensive calls for local and international phone calls and international phone calls, and multiple connections between the Internet and the general phone network do not affect the existing communication environment. do.

In particular, by specifying the number of calls per gateway in advance, the traffic congestion is prevented beforehand to ensure the same call quality as the landline telephone, and 100% compatible with the gateway that supports ITU-T's H.323 call control protocol. It is compatible with other services and automatically routes calls through IP networks or service providers that charge the lowest rates.

The detailed operation flow of the intelligent telephone exchange system having the above-described configuration is as follows.

Figure 2 is a flow chart showing the operation flow of the intelligent telephone exchange system according to the present invention, the user picks up the handset of the telephone and proceeds to the telephone number input step (S110) to enter the telephone number to call, and then to the telephone number The signal transmission step (S115) of transmitting the signal according to the gatekeeper is performed.

The gatekeeper proceeds to the idle channel check step (S120) of checking whether an idle channel, i.e., idle channel, exists, and if there is an idle channel, checks whether the call volume specified for the gateway has been exceeded. To perform the call volume check step (S125).

If the specified call amount is exceeded, the gateway check step (S130) is performed to check whether the gateway is normal, and if the gateway is normal, the corresponding gateway assignment step (S135) to allocate the gateway is performed.

However, if the idle channel does not exist in the idle channel check step (S120), or does not exceed the designated call amount in the call volume check step (S125), or the gateway is not normal in the gateway check step (S130), A neighbor gateway assignment step (S140) of allocating the nearest gateway is performed.

In other words, if the gateway cannot be allocated due to an unspecified cause, the gateway installed at a location adjacent to the gateway is allocated to perform normal IP communication.

Subsequently, the allocation confirmation step (S145) is performed to confirm whether the gateway is successfully allocated, and if the gateway is not allocated, the connection release step (S150) is performed to release the connection.

On the contrary, if the gateway is not assigned, an address translation verification step (S155) of checking whether or not the IP address (for example, 123.80.25.34) should be converted into a real phone number (for example, 02-123-4567). Then, if there is an alias (Alias) performs an address specifying step (S160) specifying the original IP address corresponding to the alias.

After the designated result receiving step (S165) for receiving the addressed result is performed, a disconnection confirmation step (S170) for checking whether the caller has released the connection is performed.

If the connection is not released by the caller, the call step S175 is performed to connect the caller and the receiver to the call state, and then the loop ends.

On the other hand, the adjacent gateway assignment step (S140) will be described in more detail as follows.

3 is a flowchart illustrating the neighboring gateway allocation step of FIG. 2 in more detail. After performing the gateway search step (S1410) in which the gateway loads the registered database and starts searching, it is checked whether there is a gateway currently available. Perform an available gateway check step (S1420).

At present, if there is no gateway available at all, the allocation failure return step (S1430) of returning to the allocation failure is performed, and then branches to the allocation checking step (S145), and if there is a gateway available, branches to the path D. .

Here, the corresponding gateway assignment step (S135) will be described in more detail as follows.

4 is a flowchart illustrating the corresponding gateway allocation step of FIG. 2 in more detail. When the gateway loads a registered database and starts a search, the gateway is loaded from the path D. A flag check step (S1355) of checking whether it is normal is performed.

If the flag is normal, the network state, for example, a network state checking step (S1365) for testing the traffic state of the data, etc., proceeds, and if the current network state is not normal or the flag is not normal, A failure return step S1375 of returning that the allocation is failed is performed.

On the contrary, if the current network state is normal, a corresponding gateway assignment step (S1380) for allocating the corresponding gateway is performed, and then a success return step (S1385) for returning that the assignment of the gateway is successful is performed.

Meanwhile, the address specifying step S160 will be described in more detail as follows.

FIG. 5 is a flowchart illustrating the addressing step of FIG. 2 in detail, and after performing an alias search step (S1610) of searching for an alias corresponding to the called party's phone, it is determined whether an alias corresponding to the called party exists. The alias existence check step (S1615) is performed.

If there is an alias in the alias existence confirmation step (S1615), the number conversion step (S1620) of converting to the actual number corresponding to the alias name is performed, and then a successful succession return step (S1625) returning that addressing was successfully performed. ).

According to a preferred embodiment of the present embodiment disclosed as described above has the following advantages.

First, since it can be selectively operated among an IP call using an IP network and a PSTN call using a PSTN, there is an advantage of preferentially selecting a relatively inexpensive IP call.

Second, even if the network state is unstable or the traffic volume is congested during the exchange process to the IP call, if the call quality over a predetermined level is not secured, the user convenience is increased by automatically switching to the PSTN call.

Third, connectable voice call means, for example, IP phone, landline phone, mobile phone has the advantage that can be exchanged by integrating into a single local area network.

Fourth, there is an advantage that the voice communication means (for example, IP telephone, landline telephone, mobile telephone) which are separated from each other locally can be integrated and exchanged in one premises switching network.

Claims (4)

An IP telephone for at least one IP communication and a PSTN telephone for PSTN communication, A private branch exchange network connected to an external public switched telephone network (PSTN) for exchanging incoming and outgoing signals between the IP telephone and the PSTN telephone; A gateway for connecting to an Internet Protocol (IP) network and the PSTN and performing a routing function when performing IP voice communication, PSTN voice communication, and data communication; A gatekeeper connected to the IP network and monitoring the state and operation of the gateway to check the channel assignment state and the amount of calls assigned to the gateway, and to control the communication through the PSTN network when communication over the IP network is difficult. , Mobile communication terminal wirelessly connected to the mobile communication network connected to the public telephone network to perform communication between subscribers It includes, and the IP phone, PSTN phone and mobile communication terminal installed to be spaced apart from each other to a single local telephone switching network, and exchange the incoming and outgoing incoming calls to the phone and the terminal to the IP telephone number via the IP network, An intelligent telephone exchange system, characterized in that the IP telephone number is automatically exchanged with the landline telephone number via the public telephone network when the corresponding IP telephone number does not form a communication path due to the channel assignment status of the gateway and the designated call volume. The method of claim 1, Intelligent gateway system, characterized in that the gateway supports the H.323 protocol of ITU-T. The method of claim 1, And the gatekeeper is displayed to monitor the operation state of the gateway on a screen. delete