VoIP Monitor is a network-based call setup and call quality monitoring product that tracks the call quality users experience, provides alerts on call performance problems, and isolates performance issues to speed troubleshooting and mean-time-to-repair (MTTR). VoIP Monitor enables IP telephony management to assess the performance of their Cisco Unified Communications Manager (Call Manager) IP PBX by tracking, evaluating, and reporting on key metrics without deploying server agents or probes. For every call, VoIP Monitor reports on user call quality and the underlying network performance metrics associated with it. VoIP Monitor also breaks out performance data from the IP and Public Switched Telephone Network (PSTN) legs of calls that pass through voice gateways traveling to endpoints in the PSTN. This data lets IT organizations know if the network is responsible for less-than-optimal call quality.