Our customer called, their 20 year old telephone entry system had failed, in Montclair. We replaced it with a Door King 1800 series entry system. The visitor dials two digits that correspond to the tenant. The system dials the tenants phone number and the tenant answers. They can speak to each other through the system. If the tenant wants to, they can buzz in the visitor, through their own phone. These systems eliminate the need for intercoms in every apartment. Greatly reducing maintenance costs associated with maintaining intercom systems in commercial buildings.