Glossary
Term | Main definition |
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Registered Communications Distribution Designer |
A professional accreditation granted by BICSI (the
Building Industry Consulting Service International).
RCDDs have demonstrated a superior level of knowledge
of the telecommunications wiring industry and associated
disciplines.
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Remodel box |
An electrical box that is designed to clamp to the wallboard,
as opposed to a
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Repeater |
(1) A device that receives, amplifies (and reshapes), and
retransmits a signal. It is used to overcome attenuation
by boosting signal levels, thus extending the distance
over which a signal can be transmitted. Repeaters can
physically extend the distance of a LAN or connect two
LAN segments.
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Resistance |
In DC (direct current) circuits, the opposition a material
offers to current flow, measured in ohms. In AC (alternating
current) circuits, resistance is the real component
of impedance and may be higher than the value measured
at DC.
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Resistance unbalance |
A measure of the inequality of the resistance of the two
conductors of a transmission line.
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Responsivity |
(1) The ratio of a detector
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RET | Remote Electrical Tilt is the addition of AISG control system to enabling tilting of the antennas from a Remote location, other than the site itself.
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RET Cable | Generic term for AISG cable assemblies.
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RET Motor | Motorised device that adjust electrical tilt of an antenna.
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Retermination |
The process of disconnecting, then reconnecting a cable
to a termination point (possibly moving the cable in the
process).
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Retractile cord |
A cord with a specially treated insulation or jacket that
causes it to retract like a spring. Retractile cords are
commonly used between a telephone and a telephone
handset.
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Retro Fit | See Snap fit
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Return loss |
The ratio of reflected power to inserted power. Return
loss is a measure of the signal reflections occurring along
a channel or basic link and is related to various electrical
mismatches along the cabling. This ratio, expressed
in decibels, describes the ratio of optical power reflected
by a component, for instance a connector, to the optical
power introduced to that component.
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Return reflection |
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Return to zero (RZ) |
A digital coding scheme where the signal level is low
for a 0 bit and high for a 1 bit during the first half of a bit
interval; in either case, the bit returns to zero volts for
the second half of the interval.
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