Deploying IP telephony or voice over IP (VoIP) is a major and challenging task.  This tool is 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 flows and queueing 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.

When deploying a new network service such as VoIP (Voice over IP, aka IP Telephony) over existing network, network architects, managers, planners, designers, and engineers are faced with common strategic, and sometimes challenging, questions.  What are the QoS requirements for VoIP?  Will my existing network support VoIP and satisfy the standardized QoS requirements?  If so, how many VoIP calls can the network support before upgrading prematurely any part of the existing network hardware?

These challenging questions have led to the development of this VoIP Analytical Simulator.  The Simulator will ease the deployment of VoIP over any existing networks and find the number of calls that can be supported within seconds