Performance of VoIP over legacy ethernet using OPNET / Mohd Fairuz Shar

Voice over Internet Protocol (VoIP) is predicted to become the usable and widely use technology of packet switching in common communication network. The voice, data video integrated technology will be reduced communication system operational costs among users especially in big companies. VoIP is support by Quality of Services (QoS) to give more reliable service. This paper studies VoIP performance over legacy Ethernet by comparison between hub and switch. The simulation model of VoIP LAN with hub and switch are developed to compare the performance for both networks. The simulation models derived based on the campus network located in a small area of not more than 100 meters, considering the maximum length of the lOBaseT LAN. These network models have been simulated using OPNET Modeler 8.1 Tools. The results for both network models are analyzed and compared. End-to-end delay, Ethernet delay and throughput produced are compared between switched Ethernet and a hub-based Ethernet.