Росин.тел TDF is an iPhone application developed by ROSIN.TEL AO. This app allows users to receive intercom calls not only on their landline phone located in their apartment but also on their mobile or other internet-connected devices. With this app, you can see who is calling your apartment, open the door, or decline the call, whether you are at work, on vacation, or inside your apartment without access to the intercom. Additionally, the app can come in handy if you forget or lose your intercom key.

The app provides the ability to view call history and door opening history. For each event in the app's history, you can view images captured by the intercom camera during the event.