H.323 beacon: an H.323 application related end-to-end performance troubleshooting tool
Proceedings of the ACM SIGCOMM workshop on Network troubleshooting: research, theory and operations practice meet malfunctioning reality
An OPNET-based simulation approach for deploying VoIP
International Journal of Network Management
An Analytical Tool to Assess Readiness of Existing Networks for Deploying IP Telephony
ISCC '06 Proceedings of the 11th IEEE Symposium on Computers and Communications
On the deployment of VoIP in Ethernet networks: methodology and case study
Computer Communications
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Deploying IP telephony or voice over IP (VoIP) is a major and challenging task. This paper describes an analytical design and planning simulator to assess the readiness of existing IP networks for the deployment of VoIP. The analytical simulator utilizes techniques used for network fl ows and queuing network analysis to compute two key performance bounds for VoIP: delay and bandwidth. The simulator is GUI-based and has an interface with drag-and-drop features to easily construct any generic network topology. The simulator has an engine that automates and implements the analytical techniques. The engine determines the number of VoIP calls that can be sustained by the constructed network while satisfying VoIP QoS requirements and leaving adequate capacity for future growth. As a case study, the paper illustrates how the simulator can be utilized to assess the readiness to deploy VoIP for a typical network of a small enterprise. We have made the analytical simulator publicly available in order to improve and ease the process of VoIP deployment.