Call Verification - A central station operator places one or more phone calls in an attempt to verify that a real alarm has occurred and not a false alarm. Typically the first call placed is to the alarm location and the operator asks for a Code Word if there is an answer. If there is no answer, depending on your dispatch procedures, the operator may try one or more additional phone numbers in an attempt to reach someone. If no contact is made, or you do not give the Code Word, the operator will dispatch the authorities. Local jurisdictions that utilize enhanced call verification (operator must place 2 phone calls before dispatching an alarm event) have found that it greatly reduces the number of false alarms.
Carbon Monoxide Detector (CO) - A device that detects the presence of dangerous levels of the toxic gas carbon monoxide in order to prevent carbon monoxide poisoning. If a high level of carbon monoxide is detected, the device sounds an alarm, giving people in the area a chance to ventilate the area and safely leave the building. At high levels, breathing carbon monoxide gas is fatal within minutes. When connected to your security system, the central station operator will dispatch the authorities.
Cellular Alarm Monitoring - A primary or secondary communication path that uses the cellular network to send signals from the alarm panel to the central station. The benefits of cellular monitoring are that no phone line is needed and there is no chance of a criminal cutting your alarm communication line as it is a wireless cellular signal. If used as a backup to regular phone monitoring, in the event of an alarm your security system will attempt to send the signal through your regular phone line. If it does not detect a dial tone, it automatically switches to the cellular transmitter, and makes a “cell phone call” to the monitoring station.
Central Station (or Monitoring Center) - A secure location staffed 24/7 by central station operators that receives signals from customers' security systems, verifies alarms, and calls the appropriate authorities.
Closed circuit television (CCTV) - A visual surveillance system used to monitor a variety of environments. The picture is viewed or recorded but not broadcast. Often used as part of a home or business security system, the system may involve a fixed communication link between camera(s), digital video recorders and monitors.
Closing - See Arm
Contact (Door/Window Sensors) - Sensors attached to your doors and windows that are triggered upon opening. You can set some systems to "chime" to notify you every time a door or window is open.
Control Keypad - Some keypads house the security panel.
Control Panel - The central computer or “brains” of a security system. Every sensor on the security system transmits to the control panel. A control panel can be connected with a central monitoring station to make it a monitored security system.