. Voice over Internet Protocol is an upcoming technology. VoIP enables voice communication through the Internet. Internet provides lot of services to the people. VoIP differs from conventional networks. The online transmission of audio data over networks faces lot of problems. Real time voice transmission is not as easy as ordinary text data. Networks are not designed to support real time commu...

— Voice services over Internet Protocol (VoIP) are nowadays much promoted by telecommunication and Internet service providers. However, the utilization of open networks, like the Internet, raises several security issues that must be accounted for. On top of that, there are new sophisticated attacks against VoIP infrastructures that capitalize on vulnerabilities of the protocols employed for the...

Voice over Internet Protocol (VoIP) is a rapidly growing technology that enables transport of voice over data networks such as Ethernet local area networks (LANs). This growth is due to the integration of voice and data traffic over the existing networking infrastructure, low cost, and improved network management offered by the technology. This research investigates the performance of VoIP traf...

The Security threats to current circuit switched networks dedicated to a single voice application such as the Public Switched Telephone Network (PSTN) are considered minimal. However, in open environments such as the Internet, conducting an attack on voice applications such as Voice over IP (VoIP) is much simpler. This is because VoIP services such as Session Initiation Protocol (SIP) are using...

Deploying IP telephony or voice over IP (VoIP) is a major and challenging task for data network researchers and designers. This paper outlines guidelines and a step-by-step methodology on how VoIP can be deployed successfully. The methodology can be used to assess the support and readiness of an existing network. Prior to the purchase and deployment of VoIP equipment, the methodology predicts t...

Article History: Received 5, May, 2015 Received in revised form 12, May, 2015 Accepted 6, June, 2015 Published online 28, June, 2015 VoIP (Voice Over Internet Protocol) is an advanced technology that has a great potential to develop new telecommunication with much lower cost and better QoS. VoIP, a new technology has been increasingly popular in recent times due to its affordability and reduced...

Voice communication carried out using the Internet Protocol (IP) for the transaction is known as Voice over Internet Protocol (VoIP). Voice over Internet Protocol is a technology for communicating using “Internet protocol” instead of traditional analog systems. Some VoIP services need only a regular phone connection, while others allows making telephone calls using an Internet connection instea...

As more and more people are using VoIP softphones in their laptop and smart phones, vulnerabilities in VoIP protocols and systems could introduce new threats to the computer that runs the VoIP softphone. In this paper, we investigate the security ramifications that VoIP softphones expose their host to and ways to mitigate such threats. We show that crafted SIP traffic (noisy attack) can disable...

The Voice over Internet Protocol (VoIP) services are currently present in our personal and professional activities and will be key services in Next Generation Networks (NGN). Hence, in order to keep and attract new customers, the quality of delivery for VoIP services needs to be measured and optimized to ensure Quality of Service (QoS) and Quality of Experience (QoE) support to users in future ...

The continuous development in the field of communication have paved the way for Voice over Internet Protocol (VoIP). VoIP is a group of hardware and software that facilitates people to utilize the Internet as the transmission medium for telephone calls by transmitting voice data in packets using IP instead of using conventional circuit transmissions of the Public Switched Telephone Network (PST...