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A security alarm[1] is a system designed to detect intrusion – unauthorized entry – into a building or area. Security alarms are used in residential, commercial, industrial, and military properties for protection against burglary (theft) or property damage, as well as personal protection against intruders. Car alarms likewise protect vehicles and their contents. Prisonsalso use security systems for control of inmates.
Some alarm systems serve a single purpose of burglary protection; combination systems provide both fire and intrusion protection. Intrusion alarm systems may also be combined with closed-circuit television surveillance systems to automatically record the activities of intruders, and may interface to access control systems for electrically locked doors. Systems range from small, self-contained noisemakers, to complicated, multi-area systems with computer monitoring and control.
The most basic alarm consists of one or more sensors to detect intruders, and an alerting device to indicate the intrusion. However, a typical premises security alarm employs the following components:
- Premises control unit (PCU), Alarm Control Panel (ACP), or simply panel: The “brain” of the system, it reads sensor inputs, tracks arm/disarm status, and signals intrusions. In modern systems, this is typically one or more computer circuit boards inside a metal enclosure, along with a power supply.
- Sensors: Devices which detect intrusions. Sensors may be placed at the perimeter of the protected area, within it, or both. Sensors can detect intruders by a variety of methods, such as monitoring doors and windows for opening, or by monitoring unoccupied interiors for motions, sound, vibration, or other disturbances.
- Alerting devices: These indicate an alarm condition. Most commonly, these are bells, sirens, and/or flashing lights. Alerting devices serve the dual purposes of warning occupants of intrusion, and potentially scaring off burglars. These devices may also be used to warn occupants of a fire or smoke condition.
- Keypads: Small devices, typically wall-mounted, which function as the human-machine interface to the system. In addition to buttons, keypads typically feature indicator lights, a small multi-character display, or both.
- Interconnections between components. This may consist of direct wiring to the control unit, or wireless links with local power supplies.
- Security devices: Devices to detect thieves such as spotlights, cameras & lasers.
In addition to the system itself, security alarms are often coupled with a monitoring service. In the event of an alarm, the premises control unit contacts a central monitoring station. Operators at the station see the signal and take appropriate action, such as contacting property owners, notifying police, or dispatching private security forces. Such signals may be transmitted via dedicated alarm circuits, telephone lines, or Internet.
Somers Point
Somers Point is a city in Atlantic County, New Jersey,United States. At the 2010 United States Census, the city’s population was 10,795,[10][11][12] reflecting a decline of 819 (-7.1%) from the 11,614 counted in the 2000 Census, which had in turn increased by 398 (+3.5%) from the 11,216 counted in the 1990 Census.[21]
The City of Somers Point is in the eastern part of Atlantic County, southwest of Atlantic City.
Somers Point was once known as the Somerset Plantation and its settlement started around 1693. The Somers Mansion, with a commanding view of Somers Point’s harbor, was built in 1725. Somers Point was designated as a port of entry in 1791 and remained one until it was abolished in 1915.[22][23]
Somers Point was originally incorporated as a borough by an act of the New Jersey Legislature on April 24, 1886, from portions of Egg Harbor Township, based on the results of a referendum held five days earlier. The borough was reincorporated on April 2, 1890, based on the previous day’s referendum. Somers Point was incorporated as a city on April 9, 1902, from all of Somers Point borough and additional portions of Egg Harbor Township.[24][25] The borough was named for John Somers.[26][27]