The Results table that appears in the Analysis Console shows how VoIP performance metrics were evaluated. You can control how Vivinet Assessor evaluates the quality of VoIP calls on your network by changing the result ranges in the Assessment Options dialog box. From the Assess VoIP Quality view, click Options > Assessment Options, and then click the Result Ranges tab.
|
Indicator |
Description |
|---|---|
|
Call Quality |
Determines how MOS estimates are mapped to VoIP quality ratings. The MOS scale runs from 1 to 5, with 1 representing the lowest quality. Vivinet Assessor rates call quality as Poor, Acceptable, or Good. Enter numbers from 1 to 5, inclusive, to determine which Mean Opinion Scores are rated Good and Acceptable; all lower scores are then rated Poor. For more information, see Section 8.5.1, Mean Opinion Score. |
|
Delay |
Determines how delay (latency) is mapped to VoIP quality ratings. Set the maximum amount of delay (in milliseconds) that a call can have if its quality is rated Good or Acceptable. Any call with higher delay is then rated Poor. For more information, see Section 8.5.2, Delay. |
|
Lost data |
Determines how data loss is mapped to VoIP quality ratings. Set the maximum amount of datagrams lost (in % of total datagrams sent) that a call can have if its quality is rated Good or Acceptable. Any call with a higher percentage of data loss is then rated Poor. For more information, see Section 8.5.5, Lost Data. |
|
Jitter Buffer Loss |
Determines how datagrams lost due to jitter buffer overruns or underruns are mapped to VoIP quality ratings. If jitter is detected, jitter buffer loss becomes a MOS impairment. Set the maximum amount of jitter buffer loss, expressed as a percentage of all datagrams sent, that a call can have if its quality is rated Good or Acceptable. Any call with higher jitter buffer loss is then rated Poor. For more information, see Section 8.5.3, Jitter. |
|
Unavailable |
Refers to an endpoint that could not be reached during a VoIP Quality assessment. An endpoint may be considered unavailable for various reasons, including network outages or problems with the endpoint software. For more information, see Section 8.4.6, Endpoint Availability. |