Evaluation of G.711, 723.1 and 729A VIOP Codec Using Guided and Unguided Communication Network

Voice over Internet Protocol is a certain technology that lets telephone calls to be easily made over a wide number of computer networks like the Internet. There are different implementations of VoIP on the internet at the present time. Numerous of leading telephone companies like AT & T have totally transferred to VoIP. It is still not obvious how the performance differs with several network conditions, considering that the Internet does not provide QoS warranties. The main goal of this paper is to assess the performance of G.711 VIOP coder for various networks. Wired, Wireless Local Area Network (WLAN), Worldwide Interoperability for Microwave Access (WiMAX) and Universal Mobile Telecommunication System (UMTS) networks were implemented in OPNET Modeler The quality is compared using different QoS parameters such as end-to-end delay, MOS, throughput, and jitter. The VoIP co codecs applied in the measurements of QoS are G.711, 723.1 AND 729A. Simulations appeared that G.711 is the best project that gives high quality of voice in Wireless Local Area Network (WLAN) communications. The results analyzed and the implementation evaluated will award network operators a suitable chance to select the codec for better services of VoIP for well customer satisfaction.