Microsoft® Lync® Server 2013 Unleashed Second Edition

Voice over IP (VoIP)

As internal networks began to grow, it paved the way for Voice over IP (VoIP) based PBXs to emerge. Instead of using traditional analog lines to provide connections between internal users, the VoIP handsets connected to the PBX over the IP protocol, just like a computer or any other device on the network. This allowed voice and data traffic to share a common infrastructure, which cuts down on wiring and management overhead. The disadvantage to VoIP in early implementations was that it relied on shared networks where there were few controls in place and no QoS deployed for the voice traffic. As networks and IP PBX systems matured in later years, more businesses attracted by the lower total cost of ownership and advanced feature ...