Simple to operate and low on maintenance. No additional cabling to flats as it can plug into an exchange line or PABX. No separate reply telephones or monitors required. Proximity access can be integral part of TelePorter panel. Each resident can have their own PIN access code if required, to allow them into the building. The door system simple comprises an Entrance Panel and a controller unit. Alpha numeric display, allowing clearer concise information to be displayed.