LIMIT AND PREVENT THE UNWANTED USE OF THE INTERNET PHONE SERVICE BY IDENTIFYING AND BLOCKING THE URI OF THE SIP PROTOCOL

Abstract

This research aims to establish a mechanism to prevent disgruntled calls(SPIT) over the Internet to general users. By the development of the program Work with the normal operation of the program Asterisk VoIP Gateway, who serves as the program developed monitoring mechanism will be two parts. 1) Check the normal behavior of the call If the destination number is a number used to connect to the incoming previously believe that such a call is a normal call interact with each other already, it will record them in the white list. The numbers above the normal call system will allow the interface to the destination number. 2)detection of abnormalities of the call from the source to the destination by checking the number of the caller is trying to call multiple numbers of same incoming numbers at time can indicate that the caller is unsolicited call. System, it will record them in the black list. This caller will be disconnected immediately so as not to interfere with target callee which when same caller connect again, it can be concluded immediately that it was normal or abnormal by use the White list and Black list.