Teams calling now allows for users to get a private line that rings to their primary account. Users must already have a Teams calling license and primary phone number to be eligible for a private line. To request a private line be added to a user's account, please place a Pinnacle order for a new number and specify it is for a private line. 

Please see Microsoft's documentation below for additional requirements and call handling of Teams private lines. 

https://learn.microsoft.com/en-us/microsoftteams/private-line