This network diagram outlines an advanced IP telephony system interconnected with a computer network. It features IP telephony servers, telephony application servers, routers, core distribution network switches, and various end-user devices including computers and mobile SIP clients. The setup illustrates the flow of voice and data across the network, ensuring efficient communication within a corporate environment. This detailed layout is essential for network engineers, VoIP specialists, and IT professionals tasked with designing or managing integrated communication systems.