Computer Telephony Integration ( CTI ) refers to managing telephony task, ie. Calls & SMS with computer softwares or Mobile Apps like managing emails. In early days peoples used to write business latters on pappers, and wait for response. This took couples of days to get the business up and running. The papper work almost replaced by using emails. Simillarly, hardware telephones is being replaced with Softphone. It reduce the tear and wear expanses and also enabled portablity of communication. SST provide intratation of Computer with Telephony and help user to faster communication.