Restrict Outbound Calls | Only Allow Outbound Calls to Assigned Numbers

Submitting on behalf of a customer.
A client would like to only allow users to call specific numbers that they assign, meaning if the numbers that they dial are not in the list of assigned numbers, it shall not go through or it should be restricted.

This allows the account to have more control over the numbers that can be called by their users making sure that called numbers are only company allowed.