Avaya VoIP Monitoring Manager Reference
86
H
HopAddress: The Hop Address column in the Trace Route Table is the IP address of each
network node in the trace route.
HopCount: The HopCount column in the Trace Route Table indicates the hop number, that is,
the position in the path node of the trace route.
HopTime: The HopTime column in the Trace Route Table displays in milliseconds the round-trip-
time of the trace route packet, from the source to each path node in the trace route.
I
Interval: The period during which the specified number of warnings must be received to trigger
an alarm (trap).
J
Jitter: Jitter is a measure of variance in the time it takes for communications to traverse from the
sender (application) to the receiver, as seen from the application layer, or the difference
between when a packet is supposed to be received and when it is actually received. Jitter
is sometimes described as the statistical average variance in delivery time between
packets or datagrams. Avaya VoIP Monitoring Manager reports Jitter in milliseconds.
Jitter Buffer Over Runs: The number of jitter buffer over-runs metric represents the number of
times during a call the actual jitter exceeded the maximum size to which the jitter buffer is
allowed to grow. This metric is an 8-bit unsigned integer.
Jitter Buffer Under Runs: The number of jitter buffer under-runs metric represents the number
of times during a call the jitter buffer became empty or starved. This metric is an 8-bit
unsigned integer.
L
Largest Sequence Fall: The Largest Sequence Fall metric represents the number of packets
that are received later than expected, that is, after a higher-numbered packet was
received. For example, if five packets arrive in the order 1, 2, 5, 3, 4, the largest
sequence fall is 2 (generally indicating that 2 packets arrived later than expected). Note:
A value of 0xFF implies that there were too many packets out of order to be able to
calculate the correct value.
Largest Sequence Jump: The Largest Sequence Jump metric represents the maximum number
of consecutive packets lost in the last RTCP reporting interval. It is based on sequence
numbers assigned to packets as they are created. For example, when the following
packet sequence numbers 1,2,3,8 are received, the largest Sequence Jump is 4. Note: A
value of 0xFF implies that there were too many packets lost to be able to calculate the
correct value.
LargestSeqFall: Refer to Largest Sequence Fall.
LargestSeqJump: Refer to Largest Sequence Jump.
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