Access - Glossary of Terms
The files created at the host of the access control system forms its database.
Default Degraded Mode
A mode of controller operation that provides a minimal authorization level in the event of controller failure.
Device Address
Value set on an access control device to determine its unique identity
Disabled Door
Turned off. Not active.
A generic term for a securable entry way. In many access control applications a "door" may actually be a gate, turnstile, elevator door, or similar device.
Door Ajar
A condition that occurs when a door is left open after a valid user has passed through.
Door Closer
A device or mechanism to control the closing of a swing door.
Door Forced Alarm
An alarm generated when a door is forced open, opening the door switch contact.
Dongle
Hardware device used to activate software only while present stops software theft.
Door Held Open
Alarm generated when an access controlled door is wedged in the open position after being opened by authorised means. Doors must be fitted with a door contact. Some systems offer local alarm feature prior to a full alarm at a central location.
Door Loop (reader)
This is a cable placed around the doorframe, within the floor or ceiling to dreate a larger aerial for a proximity reader. Uses for Hands free access and/or asset tagging.
Door Loop (for lock)
Flexible conduit either surface or concealed at the doors hinged edge to transfer power and monitoring to a lock or electric release.
Door Open Time
The time allowed for a controlled door to remain open after a valid entry. At the expiration of this time, the system records a transaction which may be defined as an alarm. If the alarm bypass relay is used, it would also de-energize at the end of this time.
Door Schedule
The listing of all door openings on the project by architect’s mark including a description of each door opening. The schedule is normally found in the contract plans or in the specification portion of the contract documents.
Download
Sending information from a host computer to a peripheral device in an access control system.
Duress
Forcing a person to provide access to a secure area against that person's wishes.
Duress Alarm
A device that generates a silent alarm signal in the event a person is experiencing duress.
Encryption
The rearrangement of the bit stream of a previously digitally encoded signal in a systematic fashion to make the information unrecognizable until restored on receipt of the necessary authorization key. This technique is used for securing information transmitted over a communication channel with the intent of excluding all other than authorized receivers from interpreting the message. Can be used for voice, video and other communications signals.
Enrolment
The process of collecting biometric samples from a person and the subsequent preparation and storage of biometric reference templates representing that person's identity.
Enrolment Time
The time period a person must spend to have his/her biometric reference template successfully created.
Ethernet
An IEEE standard (IEEE-802) for computer data communications. A local area network used for connecting computers, printers, workstations, terminals, etc. within the same building. Ethernet operates over twisted wire, coaxial cable, and RF at speeds up to 1000 Mbps.
Ethernet Hub
A networking device that enables attached devices to receiver all the information transmitted over the network, and to share network bandwidth.
Ethernet Hub
A networking device that enables attached devices to receiver all the information transmitted over the network, and to share network bandwidth.
Event
An action, condition or something that happens on the access system and becomes part of the information stored in the event data base. Event conditions can be used to trigger auxiliary outputs.
Electromagnetic Lock
An electric door lock that uses an electromagnet to hold a door closed.
This device may be a stand alone signaling device or it may be incorporated into a reader.
Duress Code
An alphanumeric code which, when entered into an access control system, alerts the system to a duress condition.
Egress
Exit, depart, leave (opposite of ingress). Electric Strike
A strike designed to be remotely controlled to permit the door to be opened without retracting the latch or bolt.
Electromagnetic
Pertaining to combined electric & magnetic fields associated with movements of electrons through conductors.
Electromagnetic Interference EMI
Excess electromagnetic energy radiated by an electrical device that may affect the operation of other electrical devices
Exit Delay Timer
An electronic timer that delays a person from immediate exiting a building for a preprogrammed amount of time (usually 15 or 30 seconds). It is used primarily for loss prevention or wandering patient systems.
Exit Switch
A push button, switch mat, proximity detector, or other device which starts a timer in the reader interface electronics when someone is leaving through a controlled entry or exit. The timer bypass (shunts) the door-open detector for a selected period of time.
Facility Code
When access control was originally developed, the memory capacity of chips was relatively small. If the access control systems would ever lose power, the system needed a "default mode or degraded mode". A system would go into a default mode when power was lost. In a default mode the system would fall back to the facility code to let someone enter the facility. Rather than look at each individual number, the system would look for any card that had the correct facility code. This meant that if two systems were installed across the street from each other, the system on one side of the streetmight have facility code 12, for example, and the company on the other side of the street would have facility code 13. Cardholders who had facility code 12 could not enter a building with a facility code 13, and vice versa. Although memory in chips has greatly increased, and the systems really no longer require a facility code, the access control industry still often uses a facility code in their formats as a convenient way to partition card data.
Fail Safe
A device that requires power (electrical energy) to remain locked. This is also referred to as fail unlocked.
Fail Secure
A device that requires power (electrical energy) to be unlocked. This is also referred to as fail lock.
False Acceptance
When a biometric system incorrectly identifies an individual or incorrectly verifies an impostor against a claimed identity.
False Acceptance Rate/FAR
The probability that a biometric system will incorrectly identify an individual or will fail to reject an impostor. The rate given normally assumes passive impostor attempts.
False Rejection
When a biometric system fails to identify an enrollee or fails to verify the legitimate claimed identity of an enrollee.
False Rejection Rate/FRR
The probability that a biometric system will fail to identify an enrollee, or verify the legitimate claimed identity of an enrollee.
Fingerprint Reader
A biometric reader that identifies a person based on the person's fingerprint pattern.
Sales and Support, Call: 1300 ADI ADI Technical Support, Call: 1800 220 345
www.adiglobal.com/au 175 Exit Alarm
A device that indicates (either audibly or silently) that a secure door has been forced opened.
Event Log
A record of actions performed and recorded by a security or access control program.
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