
Voice Testing with the FrameScope Pro 3
N2620A User’s Guide 101
Each iteration shown is based on the RTCP message exchanged
during the VoIP test.
• The Inter-arrival Jitter, To t a l P ac ke t L o s s , and Packet Loss Ratio
are based on the received RTP packets. Packet Round-trip Delay
is based on the RTCP packet information.
• R-Factor and Mean Opinion Score are based on Inter-arrival Jitter,
Total P acke t Los s , Packet Loss Ratio, and Packet Round-trip Delay.
If no RTCP packet is sent, then Packet Round-trip Delay will be
set to zero.
• Total P acke ts Se n t reports the number of packets sent from the
FrameScope Pro.
• Total P acke t Los t is based on RFC 1889/3550 “Cumulative
Number of Packets Lost”.
• Packet Loss Ratio is based on RFC 1889/3550 “Fraction Lost”.
• Total P acke ts Di s card ed refers to the number of packets
dropped at the receiving side if there are errors in the RTP
header information.
• Packet Discard Ratio refers to the discarded packet ratio for
each RTCP interval.
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