JP2001016257A - Inter-station communication system by internet protocol - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily manage routing information and to freely select a physical line through which an inter-station signal is transmitted/received without the need for a common line signal network. SOLUTION: A server 21 manages a telephone number, a called exchange 30 to be connected corresponding to the telephone number, a point code to be identified, an Internet protocol IP address and a trunk group number of a speech path to be set by using a connection number retrieval table 24 and retrieves the identification information and a trunk group number on the basis of the telephone number sent from a caller exchange 10. When the server 21 completes the retrieval, the server 21 transmits an IP packet to which the point cord, the IP address and the trunk group number obtained from the retrieval are attached to the caller exchange. Furthermore, the caller exchange attaches a telephone number received from a telephone set 11 to the IP packet to identify to which call the information corresponds.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-office communication system based on the Internet protocol, and more particularly, to a system which can easily manage routing information, does not require a common channel signaling network, and can freely use a physical line for transmitting and receiving inter-office signals. The present invention relates to an inter-station communication system using an Internet protocol that can be selected.

[0002]

2. Description of the Related Art Conventionally, an exchange individually manages routing information necessary for call connection, determines a route to a destination exchange to be connected based on a telephone number input from a subscriber, and calls the exchange. Processing related to connection is being performed.

[0003]

However, in the prior art, the management of routing information in accordance with the change of the telephone network configuration must be individually performed in each exchange, and the management is complicated. Further, when the routing is changed due to a telephone network failure or network congestion, a process of instructing a change in the routing between the exchanges and detouring or blocking a specific route is required. Therefore, processing of the inter-station signal becomes complicated.

When a so-called common channel signaling network is used, the telephone exchange establishes and releases a communication path or communicates various traffic information via the common channel signaling network. However, the common channel signaling network has a large equipment scale,
Expensive.

Accordingly, the present invention provides an inter-office communication system using an Internet protocol which can easily manage routing information, does not require a common channel signaling network, and can freely select a physical line for transmitting and receiving inter-office signals. The task is to provide.

[0006]

According to the present invention, there is provided an interoffice communication system in which a plurality of exchanges are connected to the Internet, and a server is connected to the Internet. A connection number search table for storing a telephone number and a call path, a communication processing unit for receiving an Internet Protocol (IP) packet, and information processing for setting a call path based on the telephone number attached to the IP packet The calling exchange, which receives the call from the telephone, stores the telephone number, loads the telephone number in a first IP packet, sends the first IP packet to the Internet, and receives the first IP packet. The server loads the telephone number and the search result of the call path into a second IP packet, and Sent to the side switch, the calling-side exchange, based on the first 2IP packet exchange connects the call to the receiving-side exchange.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an inter-station communication system according to the Internet Protocol (IP) of the present invention. In FIG. 1, an originating exchange 10 accommodates a subscriber line 12 to which a telephone set 11 is connected and a communication path 13. The originating exchange 10 has an IP interface 13 and is connected to the Internet 20. A server 21 is connected to the Internet 20.
Similarly, the destination exchange 30 accommodates the subscriber line 32 and the communication path 13 to which the telephone set 31 is connected, and accommodates the IP interface 33. Here, for the sake of explanation, only the calling side and the called side are distinguished from each other, and this is not intended only for transmission from a specific device.

FIG. 2 is a block diagram of the server 21. The server 21 has an IP interface 22 and is connected to the Internet. The server 21 includes a communication processing unit 23, a connection number search table 24, and an information processing unit 25.
It consists of.

FIG. 3 is a conceptual diagram showing the structure of a connection number management table managed by the server 21.

The operation of the inter-station communication system based on the IP of the present invention will be described below with reference to FIGS.

When the originating exchange 10 receives the telephone number input from the telephone 11, the IP packet to which the numerical value of the received telephone number is added is sent to the IP address of the server 21 which is recognized in advance by the originating exchange. 13 and sent out. At this time, the telephone number is stored in the originating exchange 10. The IP packet sent from the originating exchange 10 is delivered to the server 21 via the Internet 20.

In the server 21, the communication processing unit 23 performs processing for receiving the IP packet from the originating exchange 10. In the information processing unit 25, the connection number search table 24
, And uses the value of the telephone number added to the IP packet as a key to search for information about the destination exchange, which is the other party's device for which the calling telephone exchange sets the call path. As shown in FIG. 3, the server 21 manages the telephone number, the corresponding point code and IP address for identifying the destination exchange to be connected, and the trunk group number of the call path to be set in the connection number search table 24. The identification information and the trunk group number are searched from the telephone number sent from the originating exchange. Upon completion of the search, the server 21 sends an IP packet to which the point code, the IP address and the trunk group number obtained from the search are added, to the originating exchange. In addition, a telephone number input from the telephone set 11 is added to the IP packet in order to identify which call the information corresponds to in the originating exchange.

When receiving the IP packet from the server 21, the originating exchange 10 checks the telephone number added to the IP packet against the previously stored number to determine which call corresponds to the information. recognize. Further, the route of the telephone line is determined from the point code of the destination exchange added to the IP packet, and the corresponding subscriber line and the telephone line are switched and connected.

Further, in the originating exchange, the point packet and the IP address of the destination exchange 30 are designated as destinations, and an IP packet to which a trunk group number and a telephone number are added is transmitted from the IP interface 13 to the Internet 2.
Send to 0.

The destination exchange, which has received the IP packet transmitted via the Internet 20, recognizes the route of the call path from the trunk group number added to the IP packet, and is accommodated in its own device from the telephone number. It recognizes the current subscriber number and establishes a call path with the originating exchange 10.

FIG. 4 is a block diagram of an interoffice communication system in which each of an area code search server and a local code search server (local search server) is connected to the Internet. The purpose of this system is to separate the area code search server and the local area search server, thereby reducing the amount of information to be managed by each server and easily managing and changing the information.

When the originating exchange 10 recognizes from the input telephone number that the call is for an outside area, it transmits and receives an IP packet to and from the area code search server in the same manner as in the above-described embodiment, and the area is outside the area. Establish a call path with the destination exchange.

On the other hand, when the originating exchange recognizes the local telephone number from the input telephone number, it sends an IP packet similar to that of the above-described embodiment to the local area search server.

The local area search server manages a connection number search table between the subscriber line accommodating number in the local station of the originating exchange and the telephone number. The local area search server searches the telephone line number obtained from the originating exchange for a subscriber line accommodation number in the local station to be connected.
Return it to the originating exchange.

The originating exchange exchange-connects the subscriber line accommodation number of the calling side, which is stored in advance, and the subscriber line accommodation number obtained from the local area search server to establish a call.

[0021]

According to the present invention described above, the management of data is facilitated by centrally managing the change of the office data by changing the network configuration or the routing of the communication path in the search table of the server. .

Further, according to the present invention, since it is possible to transmit and receive inter-station signals between telephone exchanges via the Internet, it is not necessary to prepare a common channel signaling network, and the telephone network is not required. The equipment required for construction can be reduced.

Further, according to the present invention, since it is possible to freely select a physical line for transmitting and receiving an inter-station signal, communication can be performed by increasing the multiplicity of the inter-station signal using a high-speed line. Accordingly, it is possible to reduce the cost required for communication of the inter-station signal.

Also, according to the present invention, by accommodating the conventional interface to the common channel signaling network and the present invention together in a switchboard, communication can be performed due to congestion of the common channel signaling network or network failure. Since it becomes possible to provide a backup line in the event that the communication cannot be performed, it is possible to improve the reliability of the call path connection processing in the exchange.

[Brief description of the drawings]

FIG. 1 is a block diagram of an inter-office communication system according to the Internet protocol of the present invention.

FIG. 2 is a block diagram of a server.

FIG. 3 is a table showing an example of a connection number management table;

FIG. 4 is a block diagram of an inter-office communication system according to the present invention including an area code search server and a local search server;

[Explanation of symbols]

 Reference Signs List 10 originating exchange 11, 31 telephone 12, 32 subscriber line 13, 33 communication path 20 Internet protocol (IP) interface 21 server 22 Internet 23 communication processing unit 24 connection number search table 25 information processing unit 30 destination exchange 40 toll Office number search server 41 Local search server

Claims (3)

[Claims] 1. An interoffice communication system according to an Internet protocol in which a plurality of exchanges are connected to the Internet and a server is connected to the Internet, the server comprising: a connection number search table for storing a telephone number and a communication path; A communication processing unit for receiving an Internet Protocol (IP) packet, and an information processing unit for setting a communication path based on a telephone number attached to the IP packet. Storing the telephone number, loading the telephone number in a first IP packet and sending the first IP packet to the Internet, and receiving the first IP packet, the server compares the telephone number and the search result of the call path with the first 2 is sent to the originating exchange via the Internet, and the originating exchange exchanges the second IP packet. Based on Tsu Miyako, interoffice communication system, characterized by switching connection of the call to the receiving-side exchange. 2. The originating exchange sends a third IP packet loaded with a point code, an IP address, a trunk group and a telephone number of the destination exchange to the Internet, and the destination exchange exchanges the third IP packet. 2. A communication path with an originating exchange is established based on
The inter-station communication system according to claim 1. 3. An area code search server and a city code search server are connected to the Internet. Each server has a connection number search table storing telephone numbers and communication paths, and an Internet protocol (I).
2. The inter-station communication system according to claim 1, further comprising: P) a communication processing unit that receives a packet; and an information processing unit that sets a communication path based on a telephone number assigned to the IP packet.