Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
10Base-T
|
Ethernet (10Mbps) based on Manchester signal encoding over Category 3 or better twisted-pair cable.
|
|
|
50-pin connector
|
Commonly referred to as a telco, CHAMP, or blue ribbon connector. Commonly found on telephone switches, 66-blocks, 11 O-blocks, and 1 OBase- T Ethernet hubs.
|
|
|
66-type connecting block
|
Connecting block used by voice-grade telephone installations to terminate twisted pairs. Not recommended for LAN use.
|
|
|
absorption
|
The loss of power (signal) in an optical fiber resulting from conversion of optical power into heat and caused principally by impurities, such as transition metals and hydroxyl ions, and by exposure to nuclear radiation.
|
|
|
acceptance angle
|
With respect to optical fiber cable, the angle over which light entering the fiber core will be guided along the core rather than reflected off of the surface or lost through the cladding.
|
|
|
acceptance cone
|
The cross section of an optical fiber is circular; the light waves accepted by the core are expressed as a cone.
|
|
|
acceptance pattern
|
The amount of power transmitted represented as a curve over a range of launch angles.
|
|
|
access coupler
|
An optical device to insert or withdraw a signal from a fiber from between two ends.
|
|
|
access method
|
Rules by which a network peripheral accesses the network medium to transmit data on the network.
|
|
|
acknowledgment (ACK)
|
A message confirming that a data pacOket was received.
|
|
|
active splicing
|
A process performed with an alignment device, using the light in the core of one fiber to measure the transmittance to the other.
|
|
|
adapter
|
With respect to optical fiber, a passive device used to join two connectors and fiber cores together.
|
|
|
address
|
An identifier that uniquely identifies nodes on a network.
|
|
|
aerial cable
|
Telecommunications cable installed on aerial supporting structures such as poles, towers, sides of buildings, and other structures.
|
|
|
alternating current (AC)
|
An electric current that cyclically reverses the direction of flow. Frequency is the rate at which a full cycle occurs in one second.
|
|
|
American Standard Code for Information Interchange (ASCII)
|
A means of encoding information.
|
|
|
American Wire Gauge (AWG)
|
Standard measuring gauge for nonferrous conductors (ie., noniron and nonsteel). Gauge is a measure of the diameter of the conductor (the thickness of the cable). The higher the AWG number, the smaller the diameter of the wire.
|
|
|
ampere
|
A unit of measure of electrical current.
|
|
|
amplifier
|
Any device that intensifies a signal without distorting the shape of the wave.
|
|
|
amplitude
|
The difference between high and low points of a wavelength cycle. The greater the amplitude, the stronger the signal.
|
|
|
analog
|
A continuously variable signal. It is the opposite of digital.
|
|
|
angular misalignment
|
The loss of optical power caused by deviation from optimum alignment of fiber-to-fiber or fiber-to-waveguide.
|
|
|
ANSI
|
American National Standards Institute.
|
|
|
AppleTalk Apple
|
Computer's networking protocol and networking scheme, integrated into most Apple system software, that allows Apple computing systems to participate in peer-to-peer computer networks and to access the services of AppleTalk servers
|
|
|
aramid strength member
|
The generic name for Kevlar. A yarn used in fiberoptic cable that provides additional tensile strength, resistance to bending, and
support to the fiber bundle. It is not used for data transmission. |
|
|
armoring
|
Provides additional protection for cables. Usually consists of plastic coated steel and may be corrugated for flexibility to provide protection against severe outdoor environments.
|
|
|
asynchronous
|
Transmission where sending and receiving devices are not synchronized (without a clock signal). Data must carry signals to indicate data division.
|
|
|
attenuation
|
A general term indicating a decrease in power (loss of signal) from one point to another. The lower the attenuation value, the better opposite of gain.
|
|
|
audio
|
Used to describe the range of frequencies within range of human hearing; approximately 20 to 20,000Hz.
|
|
|
average power
|
The energy per pulse, measured in joules, times the pulse repetition rate, measured in hertz (Hz). This product is expressed as watts.
|
