VOIP Traffic

The Flowmon device supports VOIP traffic analysis and detection of its most important characteristics. For monitoring of this traffic, the Flowmon Networks proprietary technology is used, so only flow data from Flowmon Probe are supported. IPFIX protocol must be used. To enable this functionality, it is necessary to activate it on both probes on the Monitoring ports page and collector on page FMC Configuration.

The probe can recognize packets of protocols SIP, RTP, and RTCP and store information from these packets into flows. For the SIP protocol it can be, for example, service communication (call initialization, accept, reject, termination, and so on.). For the RTP protocol it can be, for example, used codec, and for protocol RTCP information about the quality of the call. Information about quality obtained from the RTCP protocol is complemented with the same information based on probe measurements. For correlated SIP/RTP/RTCP information, the Flowmon Probe must be configured to use the Extended VoIP option.