VOICE OVER INTERNET PROTOCOL (VoIP) MENGGUNAKAN ASTERISK SEBAGAI SESSION INITIATION PROTOCOL (SIP) SERVER

Voice communication by telephone can be done through the Internet without the cost and distance limitations. However, until now UNDIP not take advantage of this technology. Thus research needs to be done for the implementation of VoIP technology using asterisk as the Session Initiation Protocol (SIP) in the environment of the University of Diponegoro in particular and public in general. VoIP is a technology that allows voice conversations remotely through Internet media. Voice data converted into digital code and flowed through the network that sends packets of data. Research method used is a method of analysis and design methods. As a server, asterisk is one of the solutions to pressing development costs in the fee. VoIP using SIP as the communication protocol can be selected because of its ability to reach TCP and UDP in the local network or Internet. Asterisk as a VoIP server, using SIP protocol running on TCP and UDP without burdening the performance of TCP. Delay that occurred in VoIP communication are caused by changes in the data into sound. VoIP system resulting from the research may have been used through the local network or Internet. Thus, the handling of communications that occur can be done anywhere VoIP users are able to do with the terms of the relationship of the VoIP communication server UNDIP. Keyword : VoIP, Asterisk, SIP, communications