If you don't already have an intercom system installed in your home, there are now easy options for installing one. New wireless intercoms make installation a breeze.

There are two kinds of wireless intercoms. One communicates through your house wiring so technically it's not wireless. These systems put a digital signal on your house wiring. These systems may work well, but there are some issues with them. One is that house wiring is done in two "phases." 220 volts comes into the house and then splits into two 110 volt circuits or phases. Sometimes the digital signal won't cross to the other phase so half your house may receive the signal and half won't. These systems are also a little fussy about how you plug them in. They may not work if you plug them into power strips or any kind of a surge protector. These systems can be prone to pick up noise from electrical appliances as well.

The other type of wireless system actually sends wireless signals through the air. These systems are not prone to the problems of the house wiring system. They may, however, interfere with other wireless systems in your house. Fortunately the systems available won't interfere with your wireless computer network or even the newer cordless phones.

You can find more info at this location: http://hubpages.com/hub/How-To-Buy-A-Home-Intercom-System