VoIP Monitor enables you to measure and track performance of voice quality across WAN links. Leveraging Cisco� IP SLAs, VoIP Monitor collects and analyzes VoIP performance statistics including MOS, jitter, network latency, packet loss and other important quality of service (QoS) metrics. These features enable you to proactively find the root cause of VoIP performance degradation and measure expected voice quality in advance of a VoIP deployment.