A quality home security alarm system may decrease the chances that someone breaks into your home. Even if the alarm system does not keep someone from breaking in, it may cause the burglar to be in your home a shorter amount of time.

A quality home security alarm system generally includes these basic components:

• Control panel where the system wiring terminates, the backup battery is located and where it is connected to the phone lines for a monitored system.
• Keypad where the system is armed and disarmed.
• Siren to sound the audible alarm.
• Inside motion detector that senses changes in a room caused by human movement. Special motion detectors are available for those with pets.
• Door and window contacts that sound the alarm when the door or window is opened while the security system is activated.
• A central monitoring station that receives notice 24 hours a day, 7 days a week if any of these system components are set off or activated.
  

Some home security alarm systems include these additional components:

• Smoke detectors
• Closed circuit TV to monitor and/or record activity inside or outside
• Glass break detectors
• Panic buttons
• Pressure mats for under rugs
• Alarm screens for windows
  

Motion detectors are not recommended as the primary means of detection because they are activated only after someone breaks in. By themselves, motion sensors do not deter someone from the initial act of breaking and entering. However, other security components, such as surveillance cameras or window sensors, have been shown to deter some burglars from taking that first step to enter your home and harm your property. 

When a home security system is connected to a central monitoring station, these are the steps that occur:

• Your activated security system component senses something.
• The system waits 30 to 45 seconds to give you a chance to deactivate the system to prevent false alarms.
• If the alarm is not deactivated, the security system sends a message to the monitoring company over telephone lines.
• The monitoring company receives the message and verifies the alarm, usually by calling your home. If they do not receive the proper password or do not receive an answer, the police are called.
• The police respond and also notify the fire department or medics if needed.
• There is usually a monthly fee for the monitoring service.
  

Unmonitored systems usually have a combination of loud alarms and flashing lights. This type of system relies on neighbors or passers-by to call the police. The lights and alarms should be installed on the street side of the house where they can be easily seen, but in a position that does not provide easy access.

Choosing a home security system provider can be confusing. It's wise to ask a variety of questions to help differentiate the reputable, reliable firm from the "here today, gone tomorrow" company.

• How long has the company been in business? Find out if they are members of the local Chamber of Commerce or Better Business Bureau.
• Request references from two or three customers who purchased a system similar to what is appropriate for you. Call these people and ask if they are satisfied with the quality of the system, installation, service, and value of their investment.
• Ask about equipment warranties. What types of service agreements are available? What is the average response time for a service call?
• How does the alarm company screen new employees? Do they conduct background checks for criminal records, etc., especially for installers and service personnel?
• Obtain quotes from at least three different companies. When comparing prices, be sure that you consider company reputation, reliability, and longevity in addition to evaluating the specific coverage, features, and functionality of the proposed solution.