Glossary
Term | Main definition |
---|---|
Reversed pair |
A wiring error in twisted-pair cabling where the conductors
of a pair are reversed between connector pins at each
end of a cable. A cabling tester can detect a reversed pair.
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RF access point |
A wireless receiver and transmitter used in a wireless
network. This point accesses incoming RF signals and
transmits RF signals.
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RG | The “RG” number used for cable identification means “registration number” The registration number simply refers to an industry standard. Originated and allocated by the US military to standardize cable.
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RG/U |
Radio grade/universal. RG is the common military designation
for coaxial cable.
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RG58 | The type designation for the coaxial cable used in thin Ethernet (10Base-2). It has a 50 ohm impedance rating and uses BNC connectors.
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RG59 | RG59-Registered number 59 is a coaxial type cable.
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RG62 | The type designation for the coaxial cable used in ARCnet networks. It has a 93 ohm impedance and uses BNC connectors.
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Ribbon |
Multiple conductors or optical fibers clad in a single, flat,
ribbon-like cable.
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RICC | Rigging Installation and Commissioning Certificate, an Excel document recording antenna installation, sweep test results and schematic.
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Rigging Contractor | See Contractor
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Ring |
(1) A polarity designation of one wire of a pair indicating
that the wire is that of the secondary color of a five-pair
cable (which is not commonly used anymore) group (e.g.,
the blue wire of the blue/white pair). (2) A wiring contact
to which the ring wire is attached. (3) The negative
wiring polarity (see also tip). (4) Two or more stations in
which data is passed sequentially between active stations,
each in turn examining or copying the information
before finally returning it to the source. See also ring
topology
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Ring conductor |
A telephony term used to describe one of the two conductors
that is in a cable pair used to provide telephone
service. This term was originally coined from its position
as the second (ring) conductor of a tip-ring-sleeve
switchboard plug. See also ring.
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Ring topology |
A network topology in which terminals are connected
in a point-to-point serial fashion in an unbroken circular
configuration. Many logical ring topologies such as
Token Ring are wired as a star for greater reliability.
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Ripcord |
A length of string built into optical fiber cables that is
pulled to split the outer jacket of the cable without using
a blade.
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Riser |
(1) A designation for a type of cable run between floors
Fire-code rating for indoor cable that is certified to pass
through the vertical shaft from floor to floor. (2) A space
for indoor cables that allow cables to pass between floors,
normally a vertical shaft or space.
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