Intercoms provide a major role, in terms of security, when it comes to answering that front door.  They avoid you from presenting yourself directly to total strangers and possible harm, another advantage is your not displaying your home and furnishings as you would do, when you open the front door.  Children benefit the most from Intercom Systems as they aren't aware of the dangers in today's society.

     Below is a list of the type of intercoms available: