AWG（American Wire Gauge）is a standard system for designation wirediameter; also referred to as the Brown andSharpe (B&S) wire gauge.

Acceptance Angle, largest possible angle for launching light into anoptical fiber; this angle is used to determine thenumerical aperture (NA) of a fiber.

Access Connection is a physical connection at a central office connecting a local channel to an interoffice channel.

Adapter is a mechanical media termination device designed to align and join fiber optic connectors; often referred to as a coupling bulkhead or interconnect sleeve.

Aerial cable is a kind of telecommunication cable which installed on aerial supporting structures. such as poles, sides of buildings,and other structures.

Analog a continuously varying signal; signals may have an unlimited number of values, as amplitude and/or frequency may

vary.

Bend Radius means a cable’s radius may be bent before the risk of breakage or an increase in attenuation, may also be called cable bend radius. Minimum the radius of curvature of the fiber or cable that will result in excessive signal loss or breakage.

A fibrous or metallic group of filaments interwoven in cylindrical form to form a covering over one or more wires.

A covering over the conductor assembly that may include one or more metallic members, strength members or jackets.

Cable Tray a ladder, trough, solid bottom or channel raceway intended for,but not limited to, the support of telecommunications cable.
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Color Code is a system for identification through use of colors; fiber specified in ANSI/TIA/ EIA-598-A “Optical Fiber Cable Color Coding”.

a cable containing both fiber and copper media per NEC article 770; can also be a fiber cable with both single mode and multimode fibers.

a mechanical device used to align or attach two conductors.

a measure of conductor uniformity within a pair, hence the cable’s balance; the lower the unbalance, the better the cable will support balanced transmission.

the shortest wavelength at which the propagation of one path of light can occur.

a unit for measuring the relative strength of a signal.

the voltage which an insulation can with stand before breakdown occurs; usually expressed as a voltage gradient (such as volts per mil)

the uninsulated wire laid over the component(s), used as a common connection.

Eccentricity like concentricity, a measure of the center of a conductor’s location with respect to the circular cross section of the insulation; expressed as a percentage of displacement of one circle within the other

ELFEXT (Equal Level Far EndCrosstalk) .a method to mathematically subtract out the cable’s attenuation in order to accurately compare FEXT values from onecable to another; see FEXT.

this IEEE transmission protocol standard uses Carrier Sense Multiple Access/ Collision Detection (CSMA/CD)to transmit data in a network; there arethree different network to pologies thatsupport Ethernet transmissions: active ring,passive star and active star.

FEXT (Far End Crosstalk) crosstalk that occurs at the end opposite the location of the disturbed pair’s receiver; Normally, FEXT is only important in short links or full duplex transmission.

A 100 ohm cable with an overall foil shield and drain wire:formerly called Screened Twisted Pair (ScTP).

This type of cable meets specifications for general-purpose ratings (UL-1581), and is one of three types installed in premise s networks; multimode general-purpose cablesusually have loose tube construction and are suitablefor outdoor installation in campus network segments.

A  unit of frequency that is equal to one billion cycles per second.

Copper wire that has not been annealed after drawing; sometimes called HD wire.

Horizontal Cable from ISO/IEC 11801: Connects the floor distributor to the telecommunication(s)outlet; the cabling between and including he telecommunication soutlet/connector and the horizontal cross-connect.

An assembly of one or more cables, of the same or different types or categories, covered by one overall sheath.

Insertion Loss attenuation caused by insertion of a component into a transmission route/channel.

Aerial plant communications cable with a messenger support cable within the outer cable jacket, also known as figure-eight or self-support.

An outer non-metallic protective covering applied over an insulated wire or cable.

A class of cables made without halogens( i.e. chlorine and fluorine) to meet specific and strict fire safety codes.

A support strand, typically constructed of steel or Kevlar cable, used for attachment of communications cable for aerial plan.

Cable designed for use outdoors; these cables are suitable for the environmental conditions experienced by outdoor cables, but do not typically have a flame resistance requirement.

A cable assembly with connectors at both ends, used to join telecommunications circuits or links at the cross-connect.

The crosstalk measurement of a single disturbing pair. It can be made for NEXT or FEXT.

Such as splitters, couplers and connectors, which do not require external power to perform their function.

A length of cable with connectors on one or both ends to join telecommunications links.

A length of cable with connectors on one or both ends used to join telecommunications circuits or links at the cross-connect

A cross-connect system of mate able connectors that facilitates administration.

A type of plastic material used for outside plant cable jackets

Polyvinyl Chloride (PVC) a type of plastic material used for cable jacketing; typically used in flame-retardant cables.

Radio Frequency (RF). refers to analog signal processing and transmission technology for applications that include CATV; the term “RF” is sometimes used to refer to electronic or coaxial part of hybrid-fiber coax systems in CATV and other broadband applications.

The maximum temperature at which an electric component can operate for extended periods without loss of its basic properties.

The maximum voltage at which an electric component can operate for extended periods without undue degradation

or safety hazard.

A measure of standing waves independent of variation of input impedance, measured with a load equal to the desired characteristicimpedance of the cable.

 “RG” is the military designation for “Radio Grade” coaxial cable, and ”U” stand for ”general Utility”.

Cable designed for use in elevator shafts, utilities columns, or other vertical shafts in multi-story buildings; because

the cable connects differentfloors of multi-story buildings, it must be designed to meet safety codes that specify a low level of flammability; riser cables are also used in telephone company central offices to connect the equipment with the outside-plant cable, which enters a “vault”, which is usually below grade.

A measure of standing waves independent of variation of input impedance, measured with a load equal to the characteristic impedance of the cable at that frequency.