H3C Technologies H3C Intelligent Management Center - Manual (Page 103)

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Viewing or modifying the test thresholds
1. Click the Service tab.
2. From the left navigation tree, select Voice Service Manager > VSM Settings > VSM Settings.
The VSM Settings page appears.
3. Click the Test Thresholds tab.
4. View or modify the test thresholds.
NOTE:
A channel is rated as a specific quality level only when all the following test thresholds for this level are
met.
{
Average Packet Loss Ratio (%)—The value is in the range of 0.0 to 100.0. A higher quality level
must have a smaller value than a lower quality level.
{
Maximum Jitter (ms)—The value is an integer in the range of 0 to 200 milliseconds. A higher
quality level must have a smaller value than a lower quality level.
{
Maximum Delay (ms)—The value is an integer in the range of 0 to 500 milliseconds. A higher
quality level must have a smaller value than a lower quality level.
{
MOS Value—The value is in the range of 1.0 to 5.0. A higher quality level must have a greater
value than a lower quality level.
5. Click OK. To restore all the default values, click Default.
Figure 15 shows the channel quality evaluation flow.