What you are asking is possible. The best way for the dialing issue is to restrict access to outside lines but still be able to dial 911. These are very detailed changes that really needs a person that is trained on the product to assist you. There are several people on here that would be willing to assist you. I would also contact Samsung to find a new dealer in your area. If you had a major service issue it would be to your benift to know now who to call. The changes that you are talking about should only be done by an experienced tech.