How do visitors enter the premises when no-one is in the house?
In general, they don’t – gates are put in place to provide perimeter security. However, there are a range of intercom systems that will dial a mobile number when the intercom button is pressed at the gate and the system can be programmed so that the owner of the mobile phone, once he or she knows who wants to get in, can press a number on their mobile phone which will open the gate – either partially to allow pedestrian access or fully to let a vehicle enter the property. The mobile phone user could be on the other side of the world but the technology still enables them to control the home entrance system.