Patent ID: 8553677

Claim:
A communication system, wherein: said communication system includes a communication network, said communication network includes plural servers, a terminal T 1 is connected to said communication network, a terminal T 2 or a server W 2 is connected to said communication network, a server S 1 receives an IP packet including a telephone number or a host name of said terminal T 2 or said server W 2 , a server D 1 receives said telephone number or said host name of said terminal T 2 or said server W 2 from said server S 1 , based on said telephone number or host name of said terminal T 2 or said server W 2 , said server D 1 replies an IP address S 2 A of a server S 2 administering and controlling a communication of said terminal T 2 or said server W 2 to said server S 1 , a control of a communication between said terminal T 1 and said terminal T 2 or said server W 2 by using IP packet, is carried out by said server S 1 and S 2 , and, said communication between said terminal T 1 and said terminal T 2 or said server W 2 by using IP packet, is carried out via said communication network and is not carried out via said server S 2 .