How to unlock the door with a landline phone? Marcelino Diaz November 15, 2021 19:30 Updated If you are receiving intercom calls to a landline phone you will need to press 9 to unlock the door for a visitor. Related articles Why can't I Remote Unlock the door? How to troubleshoot Door Controller Error Message: Check Internet Connection (SwiftReader Troubleshoot) What is Audit Logs? How do I edit or view my User details? Comments 0 comments Please sign in to leave a comment.