QOS for SIP End-Points, using MPA

The IP traffic’s QoS information can be collected during calls involving parties that use SIP signaling. The QoS data can also be collected in all services that can be requested on active calls. The QoS is an information flow from the end-points, including the Media Gateways, to collect the QoS information directly from the end-points, in accordance with the RFC 3611, “RTP Control Protocol Extended reports (RTCP XR)”, and present it via the MPA application.

See the Mitel Performance Analytics (MPA) documentation, the sections about Voice metrics: SIP set voice quality ratings by call (R factor) over multiple interfaces.