EXFO EXpert VoIP Test Tools - Manual (Page 74)

Test Results
68 EXpert VoIP Test Tools
Responder Statistics
Responder Statistics
Displays the result information for packets that travelled from the controller
to the responder.
From the Tests menu, tap Results and the Responder Statistics tab.
MOS / R-factor

EXFO Conversion MOS is the Voice Quality Conversational Mean
Opinion Score (MOS) score for the RTP stream from the Controller to
Responder.

User R-Factor is the Voice Quality R-factor for the RTP stream from the
Controller to Responder.
RTP Statistics

Packet Count is the number of good packets received at Responder.

Lost Packets is the number of lost RTP packets going from the
Controller to Responder.

Late Packets is the number of RTP packets that arrived with a higher
jitter than the acceptable Jitter input parameter value. The test discards
all late packets.

Early Packets is the number of packets received and dropped by the
Responder that were too early and could not be buffered within the
jitter buffer.

Total Lost Packets is the total number of RTP packets that were either
lost, early, or late. This value is calculated using the jitter buffer length
input parameter value.

Total Lost Packets (%) is the percentage of RTP packets that were
either lost or late.