The Cloud Calls Self Service option lets Team Owners enable or disable the Cloud Calls feature to their team members, and allows team members set up Cloud Calls independently.
To enable Self Service, Team Owner must first switch the Enable team calls toggle. 

After Team Owner enables the Enable team calls toggle, they can manually enable Cloud Calls for each team member including Team Owner. 

The Self Service option lets team members manually set up the following features:

Note: the Call recording feature can be set up by Team Owner only. 

Note: if Team Owner enabled Cloud Calls for the team, but did not enable them for a particular team member, they can do this manually from the Calls section of the Settings page.