Glossary
Term | Main definition |
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Transmission media |
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Transmitter |
With respect to optical fiber cabling, a device that changes
electrical signals to optical signals using a laser and associated
electronic equipment such as modulators. Among
various types of light transmitters are light-emitting
diodes (LEDs), which are used in lower speed (100 to
256Mbps) applications such as FDDI, and laser diodes,
which are used in higher speed applications (622Mbps to
10Gbps) such as ATM and SONET.
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Transverse modes |
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Tree coupler |
A passive fiber-optic coupler with one input port and
three or more output ports, or with three or more input
ports and one output port.
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Tree topology |
A LAN topology similar to linear bus topology, except
that tree networks can contain branches with multiple
nodes.
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Triaxial cable |
Coaxial cable with an additional outer copper braid
insulated from signal carrying conductors. It has a core
conductor and two concentric conductive shields. Also
called triax.
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Triboelectric noise |
Electromagnetic noise generated in a shielded cable due
to variations in capacitance between the shield and conductor
as the cable is flexed.
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Trirated | Trirated Cable is a high temperature, flame retardant electrical cable designed for use in panel building. Trirated Cable Trirated Cable is so called because it meets the requirements of three different international standards: The British Standards Institute (BSi) BS 6231, UL (or Underwriters Laboratories), and CSA (Canadian Standards Association). Combining three international standards in one product, makes Trirated Cable suitable for use in equipment required to meet both North American and European wiring regulations. This single core cable is described as ‘high temperature cable’ because of the high temperatures to which it is subjected Voltage rating is another area over which the different standards vary. UL and CSA give Trirated Cable a voltage rating of
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Trunk |
(1) A phone carrier facility such as phone lines between
two switches. (2) A telephone communication path or
channel between two points, one of them usually a telephone
company facility.
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Trunk cable |
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Trunk line |
A transmission line running between telephone switching
offices.
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TSI |
Time slot interchanger. A device used in networking
switches to provide non-port blocking.
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Turn-key agreement |
A contractual arrangement in which one party designs
and installs a system and
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Turned | Also known as Machined Turning is an engineering machining process in which a cutting tool, typically a non-rotary tool bit, describes a helical toolpath by moving more or less linearly while the workpiece rotates.
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Twin axial | Twin axial is the same as coaxial but has two axes under one sheath.
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