Terminal-to-terminal communication connection control method using IP transfer network
First Claim
1. A communication system, wherein:
- said communication system includes a first IP communication network, and said first IP communication network includes plural servers, plural network node apparatuses and a domain name server,a communication between said network node apparatus and a terminal which is outside of said first IP communication network and is connected to said network node apparatus, is carried out by using an external IP packet, and a communication inside of said first IP communication network is carried out by using an internal packet being IP encapsulated,said first IP communication network is connected to a second IP communication network via a first gateway,a terminal T1 is connected to a network node apparatus N1, and a terminal T2 is connected to said second IP communication network,said terminal T1 sends a telephone number or host name of said terminal T2 and a connection request to a server S1, said server S1 sends said telephone number or host name to said domain name server,based on said telephone number or host name, said domain name server finds an IP address of said first gateway to communicate with said terminal T2 and said domain name server replies said IP address to said server S1,based on said connection request, said server S1 sends a message to said first gateway discriminated by said IP address, andsaid network node apparatus N1 receives said external IP packet including voice or data from said terminal T1, said network node apparatus N1 converts said external IP packet into said internal packet including said external IP packet and sends said internal packet to said first gateway, and said first gateway sends said voice or data to said terminal T2 via said second IP communication network.
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Accused Products
Abstract
Both a connection server and a relay connection server are installed in an IP transfer network; a function similar to a line connection control of a subscriber exchanger is applied to a connection server; a function similar to a line connection control of a relay exchanger is applied to the relay connection server; and a terminal-to-terminal communication connection control method with using the IP transfer network is realized in such a manner that a telephone set and a terminal such as an IP terminal and a video terminal transmit/receive an initial address message, an address completion message, a call pass message, a response message, a release message and a release completion message, which can be made in a 1-to-1 correspondence relationship with line connection control messages of the common line signal system. Furthermore, while an address administration table is set to a network node apparatus of an IP transfer network, means for registering addresses of the terminals into this address administration table is employed, so that an IP packet communication by a multicast manner can be realized with improving information security performance.
61 Citations
8 Claims
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1. A communication system, wherein:
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said communication system includes a first IP communication network, and said first IP communication network includes plural servers, plural network node apparatuses and a domain name server, a communication between said network node apparatus and a terminal which is outside of said first IP communication network and is connected to said network node apparatus, is carried out by using an external IP packet, and a communication inside of said first IP communication network is carried out by using an internal packet being IP encapsulated, said first IP communication network is connected to a second IP communication network via a first gateway, a terminal T1 is connected to a network node apparatus N1, and a terminal T2 is connected to said second IP communication network, said terminal T1 sends a telephone number or host name of said terminal T2 and a connection request to a server S1, said server S1 sends said telephone number or host name to said domain name server, based on said telephone number or host name, said domain name server finds an IP address of said first gateway to communicate with said terminal T2 and said domain name server replies said IP address to said server S1, based on said connection request, said server S1 sends a message to said first gateway discriminated by said IP address, and said network node apparatus N1 receives said external IP packet including voice or data from said terminal T1, said network node apparatus N1 converts said external IP packet into said internal packet including said external IP packet and sends said internal packet to said first gateway, and said first gateway sends said voice or data to said terminal T2 via said second IP communication network. - View Dependent Claims (2, 3, 4)
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5. A communication system, wherein:
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said communication system includes a first IP communication network, and said first IP communication network includes plural servers, plural network node apparatuses and a domain name server, said first IP communication network is connected to a second IP communication network via a first gateway, a terminal T1 is connected to a network node apparatus N1, and a terminal T2 is connected to said second IP communication network, said terminal T1 sends a telephone number or host name of said terminal T2 and a connection request to a server S1, said server S1 sends said telephone number or host name to said domain name server, based on said telephone number or host name, said domain name server finds an IP address of said first gateway to communicate with said terminal T2 and said domain name server replies said IP address to said server S1, based on said connection request, said server S1 sends a message to said first gateway discriminated by said IP address, and said network node apparatus N1 receives voice or data from said terminal T1, and said network node apparatus N1 sends said voice or data to said terminal T2 via said first gateway and said second IP communication network. - View Dependent Claims (6, 7, 8)
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Specification