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User Guide for the Cisco Network Analysis Module (NAM) Traffic Analyzer, 5.0
OL-22617-01
Chapter 3 Monitoring and Analysis
Media
• Voice Call Statistics: Number of calls per signaling protocol (SCCP, SIP, MGCP, and H.323) at each
interval during the selected interval.
• Top N End Points by Jitter (ms): Endpoints that have the largest average of endpoint reported jitter
during the selected interval.
• Top N End Points by Packet Loss (%): Endpoints that have the largest average of endpoint
reported packet loss during the selected interval.
• Top N Calls by Jitter (ms): Calls that have the longest endpoint-reported jitter during the selected
interval.
• Top N Calls by Packet Loss (%): Calls that have the most endpoint reported packet loss percent
during the selected interval.
Calls Table
The Calls Table shows you calls that the NAM detected by inspecting voice signaling protocols’ payload.
For this table to have data, the NAM must see:
• SCCP protocol: Call Information message of the call.
• SIP protocol: SIP INVITE message of the the call. Note that SIP protocol will be detected as per
call leg.
• H.323 protocol: Call SETUP of the call.
• MGCP protocol: Create connection message of the call. Note that MGCP will be detected per call
leg.
Note SIP and MGCP will be detected per call leg. Each call could be 2 or more parties. Each party has
its own call leg from the call party to control entity, e.g. Cisco Call Manager or MGCP gateway.
Any information that is not detected by NAM will be displayed as "-" or blank on the GUI screen.
To view the active calls, choose Analyze > Media > Detailed Views > Call Table. The Calls Table and
RTP Streams for the Selected Call Table display. These tables show a list of all currently active calls.
Note Some values in the Calls table are not available until the end of the call, and Cisco Unified
Communications Manager must be configured to have the IP phones send out the call status and quality
information.
Note All calculated metrics in Table 3-21, Calls Table, are based on a one minute interval.
Table 3-21 provides descriptions of the fields of the Calls Table.
Tab l e 3-21 Calls Table
Field Description
Calling Number Calling number as it appears in the signaling protocol.
Called Number Called number as it appears in the signaling protocol.