Gone are the days when a business would install "dummy" cameras as a deterrent because of the liability and law suits which have resulted from this practice. Rather, most video security systems almost always consist of several cameras, even if only one is visible. They can be concealed in many places, including smoke detectors, telephones, exit signs and even in the frames of artwork hanging on the wall.

It is also possible to have remote monitoring, allowing someone with the proper equipment installed on their personal computer to look in on a video surveillance system at another location. This is is a feature offered to parents at a growing number of daycare centers and is becoming increasingly popular for parents who want to check on their older kids who are home alone after school, etc.

Cameras can be watched live from a monitor or recorded onto videotape. It is even possible to record sound at the same time, although signs warning consumers that they are being filmed and recorded must be posted on the doors in all public places that use audio and video systems. There are no such requirements in private homes.

-- Tips courtesy of HomeAdvisor.com