Phone intercom system gets the communication by fixed or mobile network. The outside device with a display and anti-violence buttons made by inox iron. You could contact with users by a preset call.
To use the phone intercom, usually, you have to order a phone line associated to unlimited callings fare. You have to autorize the numbers before.
You could programme settings like fixed, mobile, national and insternantional numbers. You coud set up the schedule the opening time.
We have different models to different uses, contact us if you want a system addapted to you.