Once users and devices are created you can then create the users call flows.
Create a Basic CallFlow: This article will show you how to create a basic user call flow. This is where you can assign a number and extension to a user.
Create a Voicemail Box: Once the baisc call flow for a user is built the next step is to add a voicemail box to that user call flow.
Once the user call flows have been created you can then create menu call flows.
How To Create a Menu: This article outlines how to make a menu to use the press 1 press 2 press 3 feature.
Time of Day Routing: Once an auto attendant is created this will allows you to create a open hours menu and closed hours menu for more advanced call flows.