Passive VoIP monitoring probes provide single-point quality and performance measurements on live user traffic, including MOS on every live call, and on detected intrusive test calls generated by other Omni-Q probes. Users can configure passive probes according to how they wish to monitor their target traffic. First they define their target traffic, and then they decide which tests to execute on it. Once test actions are defined, the probe continuously monitors the selected targets 24 hours a day, 7 days a week. The unique filter-trigger-action mechanism of the probes is direction-aware and is based on the probes’ sophisticated run-time signaling and packet-by-packet analysis capabilities, where wild characters such as * and ? can be applied to the extracted User@domain, SRC/DST IP:Port, E164 and Alias, and where masks and ranges can be applied to IP addresses. VoIP Monitoring - Passive Probes The passive probes support a three-level operational approach to VoIP monitoring and a troubleshooting all-in-one probe. In the first layer, enhanced detail record (eDR) of performance measurements (including RTP jitter, packet loss, MOS, and others) are collected for each relevant session. For VoIP traffic, the passive probe further correlates the user-plane/RTP streams with their signaling call flows (e.g., H.323, SIP, and MGCP sessions) and conducts signaling-related measurements such as answer delay, ASR and termination causes. VoIP Monitoring - Second Level In the second level of VoIP monitoring, signaling storage is performed. In signaling storage, abnormal sessions can be specifically targeted, and their detailed call-flow decodes collected and stored for online, real-time operations and customer support. The signaling flow decode is provided for each session, and is displayed together with all the other quality detail records of the session. These provide a more comprehensive picture that could be further utilized for assessing and correcting degradation on the network.
The flow display is not just graphical, but is based on accurately time-stamped frames collected from probe hardware. (The arrival times are accurate to within 200 nanoseconds.) VoIP Monitoring - Third Level In the third level of VoIP monitoring, as the need arises for more immediate and in-depth run-time troubleshooting capabilities of sessions in progress, the probe server unit can be used for remote testing capabilities, saving on the operational cost of sending a field engineer. These capabilities are obtained via RADCOM’s Consultants and Network Consultant troubleshooting add-on applications. VoIP Monitoring - Data Services Part of the benefit of moving into an IP network is having a single network running Voice (VoIP) and data services. An important part of a comprehensive network of service monitoring is to analyze the data services in parallel to the VoIP services. RADCOM's Internet probe is the ideal tool for this. | 
