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Glossary of Terms - Access Control


Intercom installation

Anti-passback:

A means of preventing the sharing of an access control credential. Anti-passback can be based upon disabling a credential for a period of time after it is used, or by remembering the credential holder’s in/out status.


Biometrics:

The measurement of a physical trait that is unique, such as a fingerprint, hand geometry or iris pattern. In access control, this is used to identify authorized users and to grant or deny access.


CAT 5:

A very common cable type that consists of several twisted pairs in an overall protective jacket. Used for network cabling and many access control data functions.


Circuit closed:

An electrical circuit in which current normally flows until interrupted by the opening of a switch-type electronic component. (2) A circuit or switch in which the contacts are open during normal operations.


Circuit, open:

An electrical circuit in which current does not flow until permitted by the opening of a switch or a switch-type electronic component. A circuit or switch in which the contacts are closed during normal operations.


Contacts:

Electrically conductive points, or sell points, are used to make or break an electrical circuit mechanically.Controller,


Control Panel:

A circuit board or group of circuit boards that contain programming for the operation of access control or another system.


Electric Strike:

A door unlocking device that is installed in the door jamb and that works in conjunction with a mechanical lock or latch mechanism.


Electrified Lock:

A mechanical locking device that has been modified to allow an electric circuit to lock or unlock it.


Electromagnetic Lock (Magnetic Lock, Mag Lock):

A device that locks/unlocks an opening without moving parts, using pure electromagnetic attraction


Fail-safe:

An electric lock that automatically unlocks with any power interruptions.


Fail-secure:

An electric lock that requires power to unlock. (Most fail secure devices are always unlocked for egress, however.)


Proximity:

A common access card technology, proximity uses radio frequency to communicate between a card or tag and a reader without physical contact.


Reader:

A device that obtains data from an access credential (card, tag, etc.) and send the data to a controller for an access decision. (Some units combine reader and controller in one device.)

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- Are experts in the field with over 10 years’ experience in designing, installing and maintaining security systems.


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- Have a team of expert installers ready to help protect you and your property


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To find out more about anything mentioned above, please don’t hesitate to get in touch today on 0161 284 0738 or Marcus@ispycctv.co.uk