GSM intercoms are a wireless door entry system that uses mobile phone technology via a sim card, The systems allows calls to be made to a landline or mobile, allowing visitors to communicate to the occupant & for them to release the door/gate.
Intercom panels are available either with a digital keypad & LCD display or call buttons.
These intercom systems are very universal & popular at remote sites as no cabling is required back to the telephone handset. You can remotely re programme the intercom without having the hassle of visiting the site when tenants move in or out of the property. You can also check the signal strength via text message.