3Com VCX V7000 Maintenance Manual page 44

44 C 2: C
HAPTER ONFIGURING THE
C R S
ALL ECORDS ERVICE
Jitter
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Packet Loss
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Round Trip Delay
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Call Start Time
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Call End Time
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Caller Extension and IP address
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Called Party extension and IP address
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In addition to call statistics, the following aggregate average statistics are
available at the endpoint or subnet level, depending on how the statistics
collection is configured. These parameters are set to default thresholds,
using EMS, on the call processor.
Computed Mean Opinion Score Average
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Jitter Average
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Packet Loss Average
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Round Trip Delay Average
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Note the following QoS monitoring considerations:
QoS configuration information (for example, monitored endpoints
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and thresholds) is persistent across system reboots and upgrades.
The endpoint statistics and call history tables available for viewing
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through EMS do not persist across reboots of the system, upgrades, or
restarts of the Accounting server.
No QoS data is lost—it is all available in the XML formatted QDRs
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stored by the Accounting server.
For more information on using QoS monitoring and collecting QoS
statistics, refer to the EMS version 2.3 documentation.