One of our offices in California cannot dial 9-1-855-xxx-xxxx, 9-1-866-xxx-xxxx, 9-1-877-xxx-xxxx or 9-1-888-xxx-xxxx numbers from their MLS phones. Any assistance on how to add these "area codes" would be greatly appreciated. Is #412 the access code to get into "Allowed Lists?" Do they need to get into "List Entry" at the console and find a blank one to add the four "area codes?