After you complete the Utilization assessment, you can try the Bandwidth Modeling feature. Bandwidth Modeling lets you project the effects of different codecs and call volumes, and helps you determine whether more bandwidth is required to support high-quality VoIP traffic after deployment. In other words, you can test multiple “what if” VoIP usage scenarios.
Bandwidth Modeling is pretty straightforward. Click the Model Bandwidth view tab, select a link in the Monitored Links table, and click Create Modeled Link.
In the Create a Modeled Link dialog box, select the parameters you want to test, and then click OK. A bandwidth model is displayed in the Modeled Links table.
Feel free to experiment with different variations of models using the links discovered during the Sample Network Inventory. For more information, see Section 6.0, Task 4: Modeling Bandwidth.