With the rapid growth of the Internet, customers are demanding multimedia applications such as telephony and video on demand, to be available on the internet. Voice over Internet Protocol (VoIP) is a rapidly emerging technology for voice communication that uses the ubiquity of IP-based networks. The greatest challenge is the provisioning of Quality of Service (QoS) over limited bandwidth. Multi...

Supporting mobility in real-time applications such as Internet telephony is in demand as mobile Internet becomes prevalent. A simple solution is to use Mobile IP in order to provide transparent handoffs to upper layer applications. However, due in part to the Mobile IP’s limitations such as triangular routing delay and encapsulation overhead, application-layer solutions for mobile Internet tele...

Voice over Internet Protocol (VoIP) is a form of voice communication that uses audio data to transmit voice signals to the end user. VoIP is one of the most important technologies in the World of communication. Around, 20 years of research on VoIP, some problems of VoIP are still remaining. During the past decade and with growing of wireless technologies, we have seen that many papers turn thei...

A bstmctInternet and cellular technologies are merging to decrease transport costs and enable IP-based applications t o hundreds of millions of cellular users. Real time voice services will continue t o be dominant in future cellular systems and t o reduce system costs it is desirable t o base all services, including voice, on IP. However, the radio spectrum must be efficiently used to provide ...

Voice over Internet Protocol (VoIP) is subject to many security threats unique to both telephony and traditional Internet data transmission. As adoption of Session Initiation Protocol (SIP)-based telephony increases, concerns are rising over risks to system confidentiality, integrity and availability. Currently, several VoIP security tools are available to detect vulnerabilities and protect aga...

Nowadays, is more and more usual to implement the voice service over Internet (VoIP), due to the reduction in price both for the network operator and for the final users. In this paper, it is presented a new traffic shaper that increases the number of stablished connections and minimizes the delay time in the case of using an IP/ADSL (Internet Protocol/Asymmetric Digital Subscriber Line) enviro...

The “EOIP; Every Thing Over IP“ networks are widely replacing today’s different pillar networks in to the single converged network for Telephony(Any type of Access i.e. Mobile or Fixed Line) and data. Definitely new services will be expected in the NGN / EOIP such as broadcast media transmission and video on demand. But one major issues are always from past so many years are associated with Int...

Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Abstract This memo describes a content ne...

For many people, Voice over Internet Protocol (VoIP) looks like a nimble way of using a computer to make phone calls. Download the software, pick an identifier and then wherever there is an Internet connection, you can make a phone call. From this perspective, it makes perfect sense that anything that can be done with the telephone system — such as E911 and the graceful accommodation of wiretap...