By consolidating voice, video and data networks onto a single IP network, organizations have reduced the cost of communications, taken advantage of underused network capacity and laid a foundation for unified communications.
IP-based voice networks must deliver the same continuously available service that was provided with traditional TDM voice networks. High availability starts with a hierarchical network design that allows for separation of core, distribution and access layers. To ensure QoS, all forms of traffic — voice, video and data — are assigned the appropriate class of service (CoS). CoS and Priority Queuing when configured and tested will give real time user experience.