1. From the dashboard, select Extensions.
2. Click on the gear icon and select "+Add".
3. Change the type to Conference. Name the extension. Choose the extension number and owner. Click Next to assign a device number, or check the box to "Skip extension assignment" and click Finish.
4. To associate this extension with a public number, click on the edit icon and select a number from the "Company Number" list that pops up. Numbers are only available to select if they have been associated with the logged-in user's account. Click Finish to save changes.