Mediatrix 1104
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C HAPTER
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Statistics
The Mediatrix 1104 collects meaningful statistics that can be read via the RTP MIB.
RTP Statistics
RTP statistics are related to the transmission of information and include, but are not limited to:
Number of octets transmitted/received
Number of packets transmitted/received
Number of lost packets
Percentage of lost packets
Minimum, maximum and average Jitter interarrival time (time, in milliseconds, between the
arrival of packets)
Minimum, maximum and average latency time
These statistics are located under the rtpStats group of the rtpMIB. See the MIB Reference manual for more
details.
Statistics Buffers
Each statistics has three different buffers in which they are collected:
How are Statistics Collected?
When collecting statistics, you can do so in two ways:
Continuous collection of statistics.
In this case, the cumulated statistics are not used (disabled) and the current statistics are constantly
updated.
Collection of statistics for a defined period of time with a user-defined accuracy.
For instance, you could define to keep the statistics for the last 24 periods of 1 hour.
X To set statistics collection:
1. In the sysConfigMIB, locate the sysConfigStats group.
2. Set the period length you want to keep in the sysConfigStatsPeriodLength variable.
The length of a period may vary from 5 minutes to 24 hours, by 5-minutes sections. At expiration,
the current statistics are added to the cumulated statistics buffer and then reset. Note that modifying
the value of this variable resets statistics to 0.
Table 168: Statistics Buffers
Statistic Description
Last connection These are the statistics of the last completed connection.
Current These are the statistics of the current connection. If using the Cumulated buffer, they
are added to the cumulated statistics buffer and then reset.
Cumulated These are the cumulated statistics of all the connections. Define a period of time and
maximum number of periods you want to keep. For instance, you could define to
keep the statistics for the last 24 periods of 1 hour.
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