Arris NVG599 - Page 56

Administrator’s Handbook
56
For Line 1 and Line 2, the two available phone lines, the Call Statistics page displays the following information:
Call Statistics - Line 1 and Line 2
Last Call/Cumulative – Incoming/Outgoing
RTP Packet Loss Real-time Transport Protocol packets dropped
RTP Packet Loss percentage Percent of Real-time Transport Protocol packets dropped
Total RTCP Packets Total Real-time Transport Control Protocol packets
Average Inter Arrival Jitter Calculated continuously in milliseconds as each data packet is received and averaged.
Max Inter Arrival Jitter The maximum value in milliseconds recorded as each data packet is received.
Sum of Inter Arrival Jitter Calculated continuously in milliseconds as each data packet is received and totalled.
Sum of Inter Arrival Jitter
Squared
Calculated continuously in milliseconds as each data packet is received and the total is
squared.
Sum of Franc Loss Fraction Lost: The fraction of RTP data packets lost since the previous SR or RR packet
was sent. This fraction is defined to be the number of packets lost divided by the num-
ber of packets expected. This number will be calculated on every RTCP SR packet. Sum
of the fraction lost is calculated with all the RTCP packets.
Sum of Franc Loss Squared Fraction lost is squared with every RTCP SR or RR packet. Sum of all values will give the
Sum of Franc Loss Squared.
Max One Way Delay One-way delay will be calculated in milliseconds on every RTCP SR or RR packet. This
value is (systime - lsr - dslr) / 2
lsr means last SR timestamp
dslr means delay since last SR.
Sum of One Way Delay The sum of all the one-way delays calculated in milliseconds on every RTCP packet is
displayed as Sum of One Way Delay.
Sum of One Way Delay
Squared
One-way delay is squared with every RTCP SR or RR packet. Sum of all values will give
the Sum of One Way Delay Squared.
Avg Round Trip Time Average time in milliseconds from this local source to destination address and back
again for all logged calls
Max Round Trip Time Maximum amount of time in milliseconds from this local source to destination
address and back again for all logged calls
Sum of Round Trip Time Sum of time in milliseconds from this local source to destination address and back
again for all logged calls
Sum of Round Trip Time
Squared
Sum squared of time from this local source to destination address and back again for
all logged calls