Questions With 100% Correct Answers
There are four classes of administration of Structure cabling system (SCS)
Class 1 single ER equipment room
Class 2 multiple
telecommunication spaces
Class 3 multiple buildings on campus
Class 4 multiple sites
Endothermic
Ability to absorb heat
3 basic types of crosstalk of interest for balaced twisted pair
Near End (NEXT)
Attenuation to crosstalk far end (ACRF)
Alien crosstalk
intumescent
Ability to expand heat
Three transmission methods are
Simplex
Half duplex
Full duplex
Simplex
Transmits signals in one direction
Half Duplex
Transmits signals in either direction but only One Direction at a time
Direct current (DC)
Refers to a study value that does not change the polarity of the voltage or the direction of the current
Frequency
1 cycle in 1 s = 1 Hz
Full duplex
Transmit signals in both directions at the same time
Capacitance 1
Properties of conductors that allows storage of electric charges when potential differences (voltage)
exist between the Conductors
, Capacitance 2
Causes a voltage difference between two wires when separated by insulation
Capacitance is measured in
Farads
Picofarads is
One trillions of a farad
What are 3 types of Bus Bars
Primary Bus Bar (PBB)
Secondary Bus Bar (SBB)
Rack Bus Bar (RBB)
Electrical power measured in watts has two variations as known as
Apparent or reactive power and true (real) power.
The basic unit of digital information is a
Bit
The POTS signal range is transmitted between __________Hz which is regarded as the minimum
range for human speech to be audible and recognizable.
300 and 3400
Megahertz
_______ - quantifies the bandwidth of a cable system in a frequency range of interest
Megabit
______- 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 ________.
On state
Off state
Increase or decrease of three dB will result in what
A doubling or we're halving of the power
Increases or decreases of 6 dB will cause a doubling or halving of the
Voltage