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| Click on a letter to browse the terms associated with it. |
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| Alarm Panel | The alarm panel or control panel is the metal "box" that holds the circuit board or "brains" of the alarm system, along with the backup battery that powers your alarm during a blackout. Be sure your panel is installed in an area where it cannot easily be tampered with and we highly recommend avoiding systems where the “brains” and the keypad are combination units. |
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| AGC | Automatic Gain Control or AGC is a section in an electronic circuit that has feedback and regulates the output voltage level to fall within predetermined margins. Often used in a camera to give a constant one volt peak-to-peak video output, when light levels reduce after the lens auto iris is fully open. |
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| ASCII | American Standard Code for Information Interchange is a 128-character set that includes the upper case and lower-case English alphabet, numerals, special symbols and 32 control codes. A 7-bit binary number represents each character. Therefore, one ASCII-encoded character can be stored in one byte of computer memory. |
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| Aspherical lens | An Aspherical is a lens that has an aspherical (not spherical) surface. It is harder and more expensive to manufacture, but it offers certain advantages over a normal spherical lens such as a lower F number. Thus, providing a better low light and typically better image overall. |
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| Auto iris (AI) | An automatic method of varying the size of a lens aperture in response to changes in scene illumination. |
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| ANR (Bosch) | Automatic Network Replenishment (patent-pending). ANR uses local storage in the encoder to buffer video if the network connectivity between the encoder and the NVR is lost. Conventional NVRs experience recording gaps during network failures, but Bosch’s NVR uses ANR to automatically replenish those gaps. It even staggers the information relay to the NVR so the network doesn’t get overloaded. The replenishment process is automatic in that as soon as the network is up again synchronization proceeds. If the available bandwidth is low then the replenishment process is automatically throttled back so as to not overload the network. Network Fault-Tolerance - one of the greatest concerns about IP-based CCTV is the dependence on the network. The IP network is a tremendous strength for CCTV, but reliable IP Video deployments have contingency plans against its weakness. What happens if the network goes down? Maybe not due to a malicious attack but simply part of some scheduled maintenance? Network down-time means you have stopped recording video as well as have lost the ability to view it live or replay. Recording at the Edge overcomes this issue because network outage only impacts live video - the video continues to be recorded at the edge uninterrupted. Conversely in a centralized storage model both live and the ability to record is lost. However centralized recording is popular due to the economies of scale of having massive reliable RAID 5 disk arrays shared between hundreds or thousands of cameras. Bosch's patent-pending Automatic Replenishment, or ANR, combines the buffering qualities of Recording at the Edge with an intelligent central network video recorder that tracks any 'gaps' in its recordings due to network interruptions, and automatically fills, or replenishes, the gap. With ANR, you never miss a thing. |
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| Abort (Security Alarm) | an authorized system user manually cancels an alarm after an armed zone trips. Used mainly when the zone trip was accidental, such as opening of an armed door, and a police response is not needed. |
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| Abort Report (Security Alarm) | a report sent by the panel following an alarm report to indicate that alarm has been cancelled by an authorized user and no dispatch is required. |
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| Account Number (DMP) | the number that identifies all reporting systems to the central station. The account number is included along with any reports the panel sends to the receiver. |
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| Alarm Panel | The main controlling CUP in the alarm system to which all zones, phone lines, and devices are connected. |
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| Away/Stay | A panel mode of operation that provides for the system to be configured into just two areas: a perimeter and an interior. Exterior Doors and windows are assigned to the perimeter, while inside devices such are Motion Detectors and doors are assigned to the interior area. |
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| Ambush (Security Alarm) | A silent, invisible alrm signal sent to the central station that indicates a user is being fored to disarm the system. Some security panels use a unique ambush code number to prevent false alarms. |
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| Ambush Code (Security Alarm) | A special code entered to indicate a duress condition that directly threatens the user. This code does not activate signaling devices at the premises. |
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| Area (Security Alarm) | Part of a protected premise, such as the front office, that is programmed to operate separately from the other parts of the premises. Areas can have their own keypads, zones, account numbers, and arming and disarming schedules. |
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| Authority Having Jurisdiction (AHJ) | The organization, office, or individual responsible for approving equipment, and installation, or a procedure. The AHJ may be Federal, State, Local, or other regional department or individual, such as a fire chief, fire marshal, chief of fire prevention bureau, labor department, health department, building official, electrical inspector, or others having statutory authority. For insurance purposes, the AHJ may be an insurance inpection department, rating bureau, or other insurance company representitive. |
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| Address (Bosch AutoDome) | Each Bosch AutoDome has a numerical address in the control system in which it is located. This allows the appropriate dome to be operated. The address may be set locally using the Bilinx Configuration Tool for Imaging Devices (CTFID) or remotely using the Fast Address function (see Fast Address). |
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| Advanced Alarm Control (Bosch AutoDome) | AutoDome's flexible and sophisticated alarm management subsystems that allows "rules" to be created that define which inputs(s) activate one or more outputs (see Alarm Rule). In its most basic form, a rule could define which inputs(s) should activate which output(s). In a more complex form, a rule can be programmed to take a specific keyboard command (pre-existing or not) and perform a dome function, or any combination of the above |
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| Advanced Diagnostics (Bosch AutoDome) | Bosch's combination of built-in On Screen Displays (OSD) and status LEDs that are used to check critical camera parameters such as internal temperature, input voltage levels, and network connectivity. This allows a technician to quickly determine the source of problems and ensure that the dome is functioning within correct operating limits. |
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| Alarm Rule (Bosch AutoDome) | AutoDome's alarm management subsystem that uses "if this, do that" rules to perform specific actions when an event occurs. |
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| Aperture | The size of the opening in the iris. This controls the amount of light that reaches the CCD Sensor. The larger the F-Stop numbers, the less light reaches the sensor. |
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| AutoBlack (Bosch AutoDome) | A technique of boosting the video signal level to produce a full amplitude video signal even when the scene contrast is less than full range (e.g. glare, fog mist, etc.) The darkest part of the signal is set to black and the lightest part to white, thus increasing the contrast. |
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| AutoDome (Bosch AutoDome) | Fully integrated, high speed, pan/tilt/zoom camera built into a protective dome housing allowing full and continuous 360 degree coverage of the scene. |
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| Auto Focus | The lens continuously adjusts to the correct focus automatically for the sharpest picture. |
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| AutoIris | The lens iris opening is automatically adjusted to allow the correct illumination of the camera sensor. |
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| Automatic Gain Control | The electronics that regulate the gain or amplification of the video signal. |
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| AutoPan (Bosch AutoDome) | The camera pans continuously between right and left limit settings. |
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| AutoPivot (Bosch AutoDome) | As the camera tilts through the vertical position, the camera is rotated to maintain the correct orientation of the image. |
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| AutoPlayback (Bosch AutoDome) | This function records the sequence of movements of the AutoDome PTZ for later playback allowing a set pattern to be repeated automatically. This function is often called Guard Tour. |
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| AutoScaling (Bosch AutoDome) | As the camera zooms in to increase the size of objects on the monitor screen, the pan and tilt speeds are reduced so that the relative speed on the screen remains constant for similar joystick control positions. |
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| AutoTrack (Bosch AutoDome) | A patented technology that integrates motion detection into the camera allowing tracking of an object and zooming in to optimize size and perspective. |
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| Auto White Balance | A feature that allows a color camera to automatically adjust its output color to give a natural color independent of the lighting used. |
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