COMMUNICATION SYSTEM AND COMMUNICATION METHOD IN IP TELEPHONE NETWORK

摘要

PROBLEM TO BE SOLVED: To provide a communication system in an IP telephone network capable of providing a company-group telephone service in the IP telephone network. SOLUTION: In the communication system in the IP telephone network 1, an IP conversion device 20 includes a dial receiving part 23 receiving a dial number outputted from a telephone terminal 10 decided as a subscriber to the company-group telephone service and an SIP editing part 24 editing the dial number and a peculiar number to the telephone terminal 10 to an SIP signal and transmitting the SIP signal to a subscriber server 30. In the communication system, the subscriber server 30 includes a call decision part 32 transmitting the SIP signal to an application server 40 when a call from the telephone terminal 10 subscribed to the company-group telephone service is decided. In the communication system, the application server 40 includes a connection control part 42 converting the SIP signal so as to contain the peculiar number to the telephone terminal 10 related to the dial number and transmitting the converted SIP signal to the IP conversion device 20 through the subscriber server 30. COPYRIGHT: (C)2011,JPO&INPIT