Terminologies with Complete
Elaborations 2024-2025.
abandoned cable - Answer: the installed cables and cabling (connectorized cables)
that are not terminated at both ends at a connector or other equipment and not
identified with a tag for future use.
above finished floor (AFF) - Answer: the standard mounting height or vertical
distance for a fixture, ceiling, device, or any other object measured from the
finished floor surface to the center line of the object as the measurement point.
,absorption - Answer: a phenomenon causing attenuation of wave signals
(electromagnetic, optical, acoustic) passing through a medium. It occurs when
gaseous molecules or suspended water particles in the atmosphere absorb the
signal energy and convert it into heat due to molecular resonance.
A-C-rated fire-retardant plywood - Answer: The plywood treated with a fire-
retardant that has a smooth-finished A grade side that is exposed for the purpose
of mounting equipment and a rough-finished C grade side.
acceptance plan - Answer: a facilitating agreement between parties (contractor
and client or client representative) that defines satisfactory completion of a
project task or complete project. It may include items on which the client's
acceptance is dependent (delivery of as-built drawings, test certification).
acceptance test - Answer: a test or set of tests performed to demonstrate
satisfactory completion of a predetermined task or group of tasks on which
acceptance is dependent.
Access Control System (ACS) - Answer: An interconnected set of controllers
managing the entrance and exit of people through secure areas.
Access Floor - Answer: A system consisting of completely removable and
interchangeable floor panels that are supported on adjustable pedestals or
stringers (or both) to allow entry to the area beneath. Also called a raised floor.
,Access provider (AP) - Answer: A company that provides telecommunications
signals by a circuit path or other means between a service provider (SP) and the
premises of the client or user. An AP can also be the SP.
Acrylate - Answer: A coating applied during the optical fiber cable manufacturing
process to provide physical and environmental protection for the optical fiber
cable.
Active circuit - Answer: Any circuit connected to an energized system.
Active equipment - Answer: The energized equipment used for receiving or
transmitting analog or digital signals (switches, hubs, routers, private branch
exchanges)
Adapter - Answer: A device that enables different sizes or types of plugs to mate
with one another or to fit into a telecommunications outlet/connector; the
rearrangement of leads; large optical fiber cables with numerous wires to fan out
into smaller groups of wires; interconnection between optical fiber cables; and
limited voltage or polarity or direct current (dc) rectification conversion.
Administration - Answer: The methodology defining the documentation
requirements of a cabling system and its containment, the labeling of functional
elements, and the process by which moves, additions, and changes (MAC's) are
recorded. (ISO)
, Aerial Entrance - Answer: An entrance facility where the telecommunications
cables providing service to a building are placed overhead and the entry point is
located above the ground level
Alien crosstalk - Answer: The unwanted coupling of signals into a balanced
twisted-pair in a given copper cable from one or more balanced twisted-pairs
external to the given cable.
All-threaded-rod (ATR) - Answer: The straight section of round rod stock that has
threads installed over its entire length.
Alternating current (ac) - Answer: A current flow that alternates periodically
(usually sinusoidal) in magnitude and direction.
American wire guage (AWG) - Answer: A system used to specify wire size. The
greater the wire diameter, the smaller the AWG value.
ampere (A) - Answer: A unit of measure of the rate of electron flow or current in
an electrical conductor. In Ohm's Law, one A is equal to the current produced by
one volt (V) flowing through a resistance of one ohm.
Amplifier - Answer: a device that increases the voltage, current, or power of a
signal. The maximum absolute value reached by a voltage or current waveform.