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User Guide for the Cisco Network Analysis Module (NAM) Traffic Analyzer, 5.0
OL-22617-01
Chapter 2 Setting Up The NAM Traffic Analyzer
Alarms
Note If you leave a selection blank, it means that that parameter will not be considered. If you select
“Any”, it will use any of the selections for that parameter, if encountered.
Step 4 Click Submit to set the thresholds, click Reset to reset the thresholds to their default value, or click
Cancel to remove any changes you might have made.
Step 5 When finished, click Submit.
Setting Voice Signaling Thresholds
You can set up the NAM to monitor voice call quality. When Cisco Call Manager’s call detail records
option is enabled, Cisco IP phones, both SCCP and SIP, will report the call’s jitter and packet loss at the
end of the call. The NAM intercepts this information and raises an alarm when the alarm condition
crosses the rising threshold.
To set up a voice signaling threshold:
Step 1 Choose Setup > Alarms > Thresholds.
RTP Stream Metrics Choose a metric from the list:
• Jitter: Variation of packet arrival time compare to expected arrival time.
• Adjusted packet loss percent: Percent of packet loss which includes
packets actually lost and packets that arrived beyond the NAM
expected buffering capability of the endpoint.
• Actual packet loss percent: Percent of packets that the NAM has never
seen.
• MOS: Mean opinion score that is composed of both jitter and adjusted
packet loss.
• Concealment seconds: Number of seconds in which the NAM detected
packets lost.
• Severe concealment seconds: Number of seconds in which the NAM
detected packets lost of more than 5%.
Enter a Rising threshold and a Falling threshold.
Add Metrics (button) Click the Add Metrics button to add another row.
Delete (button) Click the Delete button to remove that Metrics row.
Table 2-20 RTP Streams Thresholds (continued)
Field Description