-Direct (DID) numbers will not work due to a RingCentral issue. Must use: +15615551212x104
-If you are creating it as a custom module/accounts/contacts integration make sure you have Phone and Mobile fields in the module
-If you are using business hours, make sure your deluge time is within the business hours. Your CRM Deluge time might not match your set timezone.
-Make you re-authorize after update or just to trouble shoot. How to do it:
-If you are using assignment rules make sure each user has their user profile phone number reflecting the main number x Extension