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VoIP is an emerging technology, where the voice information is transmitted through the internet. This technology is very useful but at the same time very challenging due to its susceptibility to various network variations. The VoIP packet transmission can get degraded easily and thus resulting in the packet loss, which in turn degrades network performance. In this paper, we propose to develop a hybrid...
Nowadays point to point communication have been drawing a lot of interest, because in this it communicate at specific place as per our choice at a time so that all signal will go in one direction which avoid wastage of signal which spread in all direction. ISM (Industrial, Scientific and Medical) band is a part of the radio spectrum that can be used for many purposes without a license. It is also...
Voice over IP (VoIP) gains more and more attractiveness by large companies as well as private users. Therefore, the risk increases that VoIP systems get attacked by hackers. In order to effectively protect VoIP users from misuse, researchers use, e.g., honeynets to capture and analyze VoIP attacks occurring in the Internet. Global VoIP security threats are analyzed by studying several millions of...
VoIP is technology for transmitting voice and data over IP for communication. It has various benefits such as, voice messaging, calling, video messaging as well as video conferencing with file sharing. VoIP is better than Public Switched Telephone Network (PSTN) and cellular network. We can see all the services in VoIP based application such as Skype, Google talk. Due to the file sharing and information...
Voice over Internet Protocol (VoIP) has grown substantially in the past ten years when compared to the public switched telephone network (PSTN) network, a circuit switched system because of its advantages of low cost and flexible advanced digital communication features. VoIP is an application that runs on the internet, and thus acquires its inherent security issues. We will take a closer look at VoIP...
All-IP network in Indonesia are still few in number. It is estimated that more than 5 years from now there are a combination of non-IP networks and all-IP network. At this time, an international VoIP service in Indonesia is given by the regulated and unregulated providers. The regulation of VoIP services are included in government regulation number KM.23.2002 about internet telephony for public use...
This paper compares two telecommunication standards for plaintext transmission over Session Initiation Protocol (SIP): SIP extension for Text over Internet Protocol (ToIP) and SIP extension for Instant Messaging (IM). ToIP provides a real-time text service, while IM provides a near realtime text service. Originally, SIP is a Voice over Internet Protocol (VoIP) call signaling protocol that uses Real-time...
VoIP or Telephony systems are increasingly replacing PSTN infrastructures for its easy management and low cost. While moving telephony to the public IP platform broadens its service capabilities, some security problems may occur because the amount of threats existing in IP networks and also the implementation weaknesses of IP based telephony systems. In this paper for evolving effective countermeasures...
Voice over Internet Protocol (VoIP) has become a very popular technology as it allows the users to make phone calls over the public internet. Some of its predominant features such as efficiency, cost-effectiveness and long distance communication made VoIP to stand apart from the traditional Public Switched Telephone Networks (PSTN). Session Initiation Protocol (SIP) is the contemporary signaling protocol...
In this paper we present the multiplexing of SIP, RTP, and RTCP streams using one network port. The motivation for this work is to improve and simplify the administration of a SIP-based VoIP session and to enhance the service reliability. This work extends the idea of RFC 5761, which deals only with the merging of RTP and RTCP protocols. The proposed approach resolves existing drawbacks of the session...
The Internet has now become such an important infrastructure that is capable of sending information within a very short time and easy to access. It is considered as public networks that provide affordable WAN services to most customers. Applications such as video conferencing, file transfer protocol and VoIP are the example of typical network applications supported by the Internet Protocol. Various...
In this paper a real-time video/voice over IP (VVoIP) applications has implemented in Hadoop cloud computing system and it is denoted CLC-IHU. It really outperforms the previous VVoIP using P2P connection (called SCTP-IHU) due to the easy-to-use and high-performance on video phone call. User does not need to know what is a real IP and web interface achieves interaction by adopt TCP-based RMTP instead...
Internet protocol (IP) is emerging as a ubiquitous protocol for communications and applications. IP-based services aims to provide consumers anytime-anywhere access to content over range of electronic devices and to integrate services & content, to tie them together. This paper presents an overview of various network architectures and their evolution to include an all IP based infrastructure fuelled...
Voice over Internet Protocol (VOIP) is a technology that transports voice data packets across packet-switched networks using the Internet Protocol (IP). Losing packets in the network is inevitable, and losing voice packets degrades audio quality. The Sender-Based loss-recovery techniques can be used to mitigate the undesired effects of packet loss in VOIP system. In this Paper we introduce a newly...
VoIP usage is rapidly growing due to its cost effectiveness, dramatic functionality over the traditional telephone network and its compatibility with public switched telephone network (PSTN). Internet service providers (ISPs) and telecommunication authorities are interested in detecting commercial usage of VoIP to either block or prioritize it. In this paper we propose taxonomy of existing VoIP detection...
This paper describes usage of operator-independent Public user identities (PUI) for IP multimedia communication services for enterprises. This is a particular relevant topic for enterprises that wish to use their own domain name for public identification for (IMS based) communication services. Whereas usage of enterprises-specific domain names is common for services like mail and HTTP, it has some...
VoIP (Voice over IP) systems are more and more replacing PSTN (Public Switched Telephone Network) infrastructures. This increases the dependency on available and secure VoIP systems for successful business. Attacks against VoIP systems are becoming more imaginative and many attacks can cause damage, e.g., gain money for attackers or create costs for the victim. Therefore, in this paper the current...
One of the most interesting applications of single — sided Quality of Experience (QoE) metrics is their use in improving the quality of the service, as perceived by the user. This can be done either at the application level — by for example changing the encoding in use, or the level of error correction applied — or at the network level, for instance by choosing a different DiffServ marking strategy,...
This design mainly aims at the small and medium-sized enterprise. On its existing internal integration local area network, it realizes the special-purpose IP telephone network in the enterprise, and it also realizes the main purpose that is the “zero” long-distance phone bill trans-regional enterprise. Because of VoIP is the technology of analog voice signal digitized and making the real-time transmission...
As the Internet technology, speech technology progress and development, VOIP gradually become the mainstream of the present and future voice technology. VOIP and operation in IP network application system based on IP other as common security threat and weaknesses, including all the threat from IP network layer. VOIP technology safety problems also gradually revealed, more and more get more extensive...
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