How does it work?

The operation is very simple Homfor IP DoorCom.

Homfor IP DoorCom is basically a phone with IP technology. When pressing the button or select a caller in the display, Homfor IP Doorcom calls the preset phone number. Depending on how the system is configured, the phone you can be call a physical phone, a smart phone, a touch screen, a PC or any device capable of receiving Voice over IP communications.

The call receiver may open the door dialing a number in the phone keyboard.

It's that simple.