VoIP Over Wireless LAN

Abstract

(VOIP) networks combine both voice and data communications networking technologies. VOIP networks combine the best of voice and data communications networking technologies. But that combination also creates some challenges, as the industry attempts to meld the best of circuit switching (from the voice side) and packet switching (from the data side) into single technology. TCP/IP protocol stack is not sufficient for VOIP. Seamless wireless LAN is fast becoming a reality. VOIP over WLAN as technology enables IP voice to be sent over an (802.11) WLAN. Voice over IP over Wireless LAN is getting great attention from the industry and the products for VOIP OVER WLAN deployment are emerging rapidly. This technology can bring people many benefits. It has all the advantages of VOIP systems along with greater mobility. Mobility usually means increased productivity since it also reduces the cost for deployment of wired phones. Just as when introducing voice to IP networks, VOIP Over WLAN has the same problems as VOIP regarding deployment. Some characteristics of wireless networks cause additional difficulties. Carrying voice over wireless networks introduces new challenges. The WLAN industry is working hard to enable 802.11-based networks to accommodate the technical characteristics of VOIP. In this project, the work has been carried out is implementing SIP Soft Phone in simputer which is a ARM based handheld device running Linux and having wireless environment. The performance of call flow and media streams has been also measured and analyzed.