Glossary
Term | Main definition |
---|---|
Tone generator |
A small electronic device used to test network cables for
breaks and other problems that sends an electronic signal
down one set of UTP wires. Used with a tone locator
or probe.
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Tone locator |
A testing device or probe used to test network cables for
breaks and other problems; designed to sense the signal
sent by the tone generator and emit a tone when the signal
is detected in a particular set of wires.
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Topology |
The geometric physical or electrical configuration
describing a local communication network, as in network
topology; the shape or arrangement of a system.
The most common topologies are bus, ring, and star.
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Total attenuation |
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Total internal reflection |
The reflection of light in a medium of a given refractive
index off of the interface with a material of a lower
refractive index at an angle at or above the critical angle.
Total internal reflection occurs at the core/cladding
interface within an optical fiber cable.
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TP Transition point | ISO/IEC 11801 term that defines a location in the horizontal cabling subsystem where flat under-carpet cabling connects to round cabling or where cable is distributed to modular furniture. The ANSI/TIA/EIA-568-B equivalent of this term is consolidation point.
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Tracer |
The contrasting color-coding stripe along an insulated
conductor of a wire pair.
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Tractor |
A machine used to pull a preform into an optical fiber
using constant tension.
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Transceiver |
The set of electronics that sends and receives signals on
the Ethernet media system. Transceivers may be small
outboard devices or they may be built into an Ethernet
port. Transceiver is a combination of the words transmitter
and receiver.
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Transducer |
A device for converting energy from one form to another,
such as optical energy to electrical energy.
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Transfer impedance |
For a specified cable length, relates to a current on one
surface of a shield to the voltage drop generated by this
current on the opposite surface of the shield. The transfer
impedance is used to determine shield effectiveness
against both ingress and egress of interfering signals.
Shields with lower transfer impedance are more effective
than shields with higher transfer impedance.
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Transient |
A high-voltage burst of electrical current. If the transient
is powerful enough, it can damage data transmission
equipment and devices that are connected to the transmission
equipment.
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Transimpedance amplifier |
In a fiber-optic receiver, a device that receives electrical
current from the photodiode and amplifies it before
sending it to the quantizer IC.
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Transmission line |
An arrangement of two or more conductors or an optical
waveguide used to transfer a signal from one location to
another.
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Transmission loss |
The total amount of signal loss that happens during data
transmission.
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