Intercom systems keep getting better, cheaper

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Do you ever wish you could talk to someone at the front door while you're upstairs or monitor the sounds from the baby's room while you're in the kitchen? A central intercom system will allow you to do just that, and more. You can pipe music through the house, call everyone for dinner, even remotely scan a security camera at the front or back door–all from a central location. Intercom systems are nothing new, but, like many things electronic, they have evolved over the years. New technology has led to improved performance and often to lower prices, and many systems are very simple for the do-it-yourselfer to install, even in an existing home. As is typically the case with a home improvement project, your first step is to decide what type of system you wish to install. An intercom system is simply a two-way transmit/receive unit that allows one person to talk in one location and another to listen at a different location. From there, you can increase to multi-room capabilities; r...