Agilent-technologies N2620A Manual do Utilizador Página 119

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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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