INTERCEPT SYSTEM, PATH CHANGING DEVICE, AND COMPUTER PROGRAM

摘要

An intercept system, a route changing device and a computer program of the present invention are provided with a call controller such as an SIP server computer for controlling the call between a plurality of communication devices connected through a packet network, a route setting device such as a router for setting a route along which communication on the call between the communication devices is relayed, and a duplicating device for duplicating a packet to be intercepted, acquire communication device identification information for identifying positions on the packet network of the communication devices from the call controller, set the route setting device in such a way that a packet received from one communication device is transmitted to the duplicating device as to the communication on the call between the communication devices identified by the acquired communication device identification information, and return the received packet to the route setting device after the duplication of the received packet by the duplicating device for interception.