Using Control Center, you can update the configuration of your SIP trunk service depending on your organization's needs. The status of the changed phone numbers momentarily shows as update until the changes are complete, the changes take place immediately.
To update a SIP trunk phone number:
Did you know? To block outgoing calls (or adjust the calling area) for a phone number, edit the number(s) as described above and select an option from the Blocked Calls list.