The system adopts multi-threading technology, can simultaneously support multiple network telephone platforms, the pursuit number can be set to "arbitrary number display", not easy to be intercepted by the other side's call "firewall". The functions increased in the Network Telephone Auto Pursuit System (version 4.0.0.0) (Call Death System) are as follows: (1) increase He Yue, Ali Tong, UU Call network telephone automatic recognition connection status....