How to unlock the door with a landline phone? Marcelino Diaz July 19, 2022 17:40 Updated If you are receiving intercom calls to a landline phone you will need to press 9 to unlock the door for a visitor. Intercom calls will come from the following number: (240) 709-1512. Related articles Why can't I Remote Unlock the door? Error Message: Check Internet Connection (SwiftReader Troubleshoot) How to troubleshoot Door Controller How do I edit or view my User details? How do I create a custom PIN? Comments 0 comments Please sign in to leave a comment.