Door intercom systems are used to communicate with whoever is at the door, trying to identify their identity. Based on what you are looking for, you can choose between wired intercom systems and wired intercom systems. You can also choose between audio and video intercom systems. An audio system operates like a telephone, whereas the video intercom systems allow one-way access, where you are able to see whoever is trying to gain access to your property. With a front door intercom system, you will be able to verify the identification of a visitor right before you open the door. And if you ordered something, the intercom system will help you identify if the deliveryman is who he or she says he is. A house intercom system will enable you to avoid any unwanted guests, giving you the opportunity to turn them away, without even having to open the door. Moreover, would you like your elderly parents to feel safe at their homes? have a door intercom system installed at their front door. This way, it will give them peace of mind being able to verify the person trying to gain access to his/her home.