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, when the changes take place immediately.
To update a SIP trunk phone number:
Control Center displays a list of all services assigned to the accounts under your enterprise ID. If you have more than ten services, you can view the rest of your services by clicking one of the blue linked Show numbers at the top of the list or you can click the blue down arrow at the bottom of the list to add ten services at a time to the view.