There are four classes of administration of Structure cabling system (SCS) - CORRECT
ANSWER-Class 1 single ER equipment room
Class 2 multiple
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telecommunication spaces
Class 3 multiple buildings on campus
Class 4 multiple sites
Endothermic - CORRECT ANSWER-Ability to absorb heat
3 basic types of crosstalk of interest for balaced twisted pair - CORRECT ANSWERNear End (NEXT)
Attenuation to crosstalk far end (ACRF)
Alien crosstalk
intumescent - CORRECT ANSWER-Ability to expand heat
Three transmission methods are - CORRECT ANSWER-Simplex
Half duplex
Full duplex
Simplex - CORRECT ANSWER-Transmits signals in one direction
Half Duplex - CORRECT ANSWER-Transmits signals in either direction but only One
Direction at a time
Direct current (DC) - CORRECT ANSWER-Refers to a study value that does not
change the polarity of the voltage or the direction of the current
Frequency - CORRECT ANSWER-1 cycle in 1 s = 1 Hz
Full duplex - CORRECT ANSWER-Transmit signals in both directions at the same time
Capacitance 1 - CORRECT ANSWER-Properties of conductors that allows storage of
electric charges when potential differences (voltage) exist between the Conductors
Capacitance 2 - CORRECT ANSWER-Causes a voltage difference between two wires
when separated by insulation
Capacitance is measured in - CORRECT ANSWER-Farads
Picofarads is - CORRECT ANSWER-One trillions of a farad
What are 3 types of Bus Bars - CORRECT ANSWER-Primary Bus Bar (PBB)
Secondary Bus Bar (SBB)
Rack Bus Bar (RBB)
Electrical power measured in watts has two variations as known as - CORRECT
ANSWER-Apparent or reactive power and true (real) power.
The basic unit of digital information is a - CORRECT ANSWER-Bit
The POTS signal range is transmitted between __________Hz which is regarded as the
minimum range for human speech to be audible and recognizable. - CORRECT
ANSWER-300 and 3400
Megahertz - CORRECT ANSWER-_______ - quantifies the bandwidth of a cable
system in a frequency range of interest
Megabit - CORRECT ANSWER-______- refers to the number of bits of information that
can be transported over the media
DIGITAL TRANSMISSION
When a device First starts a transmission it will employ a nominal bass voltage of some
level of volts. Example 24 V.
A pulse of +3 V would indicate ______ and the line voltage would rise from 24 V to 27
V.
When the voltage level returns to the 24 V base, it would represent an ________. -
CORRECT ANSWER-On state
Off state
Increase or decrease of three dB will result in what - CORRECT ANSWER-A doubling
or we're halving of the power
Increases or decreases of 6 dB will cause a doubling or halving of the - CORRECT
ANSWER-Voltage
A gauge change of __ numbers approximately doubles or halves the conductor's
resistance. - CORRECT ANSWER-3
Resistance - CORRECT ANSWER-Is the property of a conductor to resist the flow of
electricity through it and is expressed in ohms.
Inductance - CORRECT ANSWER-Is a property of Electromagnetic field built around a
conductor that opposes any change in current flow in a circuit both AC and varying DC.
Henry - CORRECT ANSWER-The basic unit of inductance is a
Impedance - CORRECT ANSWER-In AC circuits the total opposition to current flow it's
called _______ and is measured in ohms
Characteristic impedance - CORRECT ANSWER-The input impedance of a uniform
analog transmission lines of infinite length.
Insertion loss (attenuation) - CORRECT ANSWER-Measured in decibels per unit length
at a given frequency
Return Loss - CORRECT ANSWER-The amount of reflected energy is affected by the
degree of impedance mismatch between the receiver any transmitter
Nominal Velocity of Propagation (NVP) - CORRECT ANSWER-The ratio of the speed of
transmission along a cable relative to the speed of light in a vacuum
Some key factors in establishing a good connection and minimizing loss of signal
include - CORRECT ANSWER-Fit
Alignment
Functionality
Configuration
Connectors - CORRECT ANSWER-Connecting hardware is often referred to as
All category/class rated cable - CORRECT ANSWER-Generally have a characteristic
impedance of 100 ohm
Near-End Crosstalk (NEXT) - CORRECT ANSWER-Is a measure of the unwanted
signal coupling from transmitter at the near end into another pair measured at the near
end
Attenuation-to-Crosstalk Ratio, Far-end (ACRF) - CORRECT ANSWER-Is the measure
of the unwanted signal transfer that is assistant by applying a signal on one pair at the
near and measuring the signal transfer level on any disturbed pair at the receiving end
of the cable
(ACRF) - CORRECT ANSWER-Is measured and expressed in decibels at the opposite [Show Less]