Essentially a door phone intercom system is a way to screen and identify visitors without having to actually open the door. In many cases you don't even have to go near the door in order to see who is there. It works like this – a visitor to your home pushes the door phone system's button, which looks much like a doorbell button or buzzer. The phone that is connected to the system rings with a unique tone to let you know it's the door and not a caller. You simply answer the phone and speak with the person waiting outside. Some systems take it even a step further and utilize a camera system that allows you to actually view who is at the door through a closed circuit video feed.
The benefits of these systems are obvious. There's no need to risk opening the door or even peeking through a peephole, for one. You can ensure that the person at the door is someone you know or want to speak with before you open the door for them. And it's also much easier to recognize a phone ringing than it is to hear a knock at the door, especially in the middle of a busy day. And certain door phone intercom systems will actually allow you to 'buzz' the person through, remotely unlocking or even opening the door through the use of a simple button.
The more advanced models like the Valcom VIP 170IP HandsFree Talkback Intercom system includes numerous extra features that basic models won't include. You'll get auto talkback VOX operation, for instance, the ability to connect to IP closed circuit television cameras, door or gate relay, and even a notification that alerts you when a door is ajar. Integration into IP phone systems is a major advantage of the more modern door phone intercom systems and one that you can't afford to simply overlook, especially if you're looking for the best systems on the market.
Another great thing about a door phone intercom system is that when compared to other security options they're actually very inexpensive. Alarm systems usually involve an installation fee followed by a monthly charge, guards are only for those with plenty of case and a real need for them, and closed circuit television systems can be costly for larger options. And CCTV systems don't work too well at preventing certain dangers from occurring. If you're looking for an affordable way to increase your home's security, utilizing door phone systems may be the perfect choice for your needs.