As current Voice-over-IP (VoIP) systems encourage a direct communication between the callees they are similar in design to peerto-peer (P2P) approaches. Therefore, we introduce a f...
Skype is a popular peer-to-peer (P2P) voice over IP (VoIP) application evolving quickly since its launch in 2003. However, the ability to traverse network address translation (NAT...
The Session Initiation Protocol (SIP) is increasingly used as a signaling protocol for administrating Voice over IP (VoIP) phone calls. SIP can be configured in several ways so t...
In this paper, we present an approach for detection of spam calls over IP telephony called SPIT in VoIP systems. SPIT detection is different from spam detection in email in that t...
Abstract—The multimedia communication is rapidly converging towards Voice over Internet – commonly known as Voice over Internet Protocol (VoIP). Session Initiation Protocol (SI...