Voice Over Internet Protocol Advantages And Disadvantages

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ABSTRACT Voice over Internet Protocol (VoIP) is a type of hardware and software. It enables people to use the Internet as the transmission medium for telephone calls by sending voice data in packets using IP. VoIP service is cheap and easy to use. Since it is simple, upgrading also simpler too. The advantages of VoIP service like free charge is produce the major disadvantages too because the spam callers like as advertiser, telemarketers, prank callers are using this free charges for generating the bulk unwanted calls and messages. Our aim is to block the spam calls without user involvement. The pre acceptance method are based on caller trust and reputation for block the unwanted calls by using call duration, call rate of the VoIP users. First, by use of call duration and call rate we have to compute the social network strength and trust value of the user. Next we have to find the global reputation of a caller across the network. Then the global reputation value will compare with threshold value, if the value is higher than the threshold value means the caller is legitimate caller or else the global reputation value is lower than the threshold vale, then it is non-legitimate caller. Key words: VoIP, SPIT, Direct trust, Reputation. INTRODUCTION VoIP is used for data transition on IP based networks. With the growth of broadband connectivity, VoIP is a new trend in voice communication. The VoIP technique is simple, that the analog signals are converted to digital signal

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