Specifications

© 2006 Cisco Systems, Inc.
All rights reserved.
Product Features 2-94
NAM / Traffic Analyzer v3.5 Tutorial
© 2006 Cisco Systems, Inc. All rights reserved.
Product Features 2-94
NAM / Traffic Analyzer v3.5 Tutorial
Setup > Monitor > Voice Monitoring
Enabling Traffic Monitoring
Voice
Enabling Traffic Monitoring
Voice
If you enable voice monitoring, the Traffic
Analyzer software generates the Aggregate
Statistics table as well as the detailed reports
illustrated on the next page.
If you enable voice monitoring, the Traffic
Analyzer software generates the Aggregate
Statistics table as well as the detailed reports
illustrated on the next page.
Enabling Voice Monitoring
Performance monitoring of voice applications is critical because voice traffic is much more sensitive to
fluctuations in network performance than data. Packet loss and jitter are two very important indicators of call
quality. The NAM can monitor voice-over-IP (VoIP) calls by collecting data from a variety of sources,
including the Cisco Call Managers. It can also monitor VoIP performance by collecting SCCP, H.323, MGCP,
or SIP packets between IP phones and the Cisco Call Manager that are generated during call setup and tear-
down, giving you visibility into Cisco Call Manager and network performance (packet loss and jitter statistics).
In addition, the NAM can monitor Real-Time Control Protocol (RTCP) to provide real-time reporting on call
statistics.
Enabling voice monitoring is also a straightforward process. From the Setup > Monitor window, choose
Voice Monitoring from the list in the left corner. The Voice Monitor Setup window allows you to turn on voice
monitoring by protocol, either SCCP, H.323, MGCP, SIP or all four of them. You also have the option of
defining how many voice call packet loss and jitter entries the NAM will track before overwriting the oldest
entries with newer entries. The advantage to customizing these parameters is that it enables you to influence
the amount of resources dedicated to this table. For example, more rows means that more memory in the
NAM is allocated to the table. Adjusting your table size is one of the configuration parameters you will want to
consider when you evaluate your monitoring needs against the resource utilization and performance of your
NAM. To view the results of your configuration, choose Monitor > Voice > Voice Overview and drill down to
the detail screen by choosing the protocol you want to view and clicking the Details button.