Voice over Internet Protocol (VOIP) is one of the most notable applications of internet. Some other well known terms used for VOIP in literature include IP telephony or Internet telephony. It can be a better replacement for the traditional telephone systems because of its high resource utilization as well as low cost. Beside this, wireless LAN Network (WLAN) has emerged as a robust networking t...

1 1 SUMMARY The sustained rate of technological change in the telecommunications industry has opened up significant windows of opportunities for telecommunications networks operators to develop value-added services and multimedia applications. The growth of the Internet raises the issue of a possible migration from traditional circuit-switched networks designed for basic voice communication tow...

Voice over Internet Protocol (VoIP) is one of the fastest growing Internet applications. It is a viable alternative to the traditional telephony systems due to its high resource utilization and cost efficiency. Meanwhile, Wireless Local Area Networks (WLANs) have become a ubiquitous networking technology that has been deployed around the world. Driven by these two popular technologies, Voice ov...

This Magic Quadrant evaluates network service providers (NSPs) that offer international network services to multinational companies (MNCs) with regional networks in Asia/Pacific. The providers focus on data services, especially Internet Protocol (IP) VPNs and, increasingly, Ethernet offerings. Most also offer voice services, especially voice over IP (VoIP) and IP telephony in association with I...

This paper surveys packet loss in Voice over Internet Protocol (VOIP). The voice quality is affected by many network impairments. IP networks are on a steep slope of innovation that will make them the long term carrier of all types of traffic, including voice. Such networks are not designed to support real time voice communication because of their variable characteristics. The conversational qu...

Voice over Internet Protocol (VoIP) is a general term for a family of transmission technologies to delivery of voice communications over IP networks such as the Internet or other packet-switched networks. VoIP systems employ session control protocols to control the set-up and tear-down of calls as well as audio codecs which encode speech allowing transmission over an IP network as digital audio...

Voice over Internet Protocol is a category of hardware and software that enables people to use the Internet as the transmission medium for telephone calls by sending voice data in packets using IP rather than by traditional circuit transmissions of the PSTN. The transmission of real time voice data is not as easy as ordinary text data and the real time voice transmission faces lot of difficulti...