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Systems Verification BICSI Final
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Systems Verification BICSI Final
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Systems Verification BICSI FinalCross Connects, Backbone Cabling, and Administration - correct
answer-Administration systems include requirements for; identifiers - that serve to
locate the element record and administration scheme such as the standards found in
ANSI/TIA 606-B, records - which can be paper based, spreadsheets, database
programs, or computer programs specially designed for that purpose, and labeling -
with a variety of methods to display identifiers for the buildings, pathways, spaces,
cabinets, racks, cabling, connectors, the choice of material, fastening method,
environmental, performance, and security issues. Common methods for displaying
identifiers include bar codes, graphics, labels, tags, and electronic identifiers
There are four classes of administration:
Class 1 - 1 ER which is the only telecommunications space on the site
Class 2 - 2 or more telecommunications spaces in a building
Class 3 - Multiple buildings at a single site
Class 4 - Multiple sites or campuses
Data Centers - are buildings or portions of a building whose primary function is to
house a computer room, including the data center electrical rooms, mechanical
rooms, storage rooms, staging rooms, operations and command center, and other
spaces whose primary functions are to support the computer room.
For redundancy, in accordance with ANSI/BICSI-002 stamdards, classes of Data
Centers have been established.
Class 0 - a single path data center that meets the minimum requirements but cannot
be classified as Class 1 or higher
Class 1 - the single path data center
Class 2 - the single path data center with redundant components
Class 3 - the concurrently maintainable and operable data center
Class 4 - the fault tolerant data center that contains two separate infrastructures with
their own set of redundant components.
Some of the key areas include a Telecommunications Entrance Room that contains
the External Network Interface (ENI), wh
American Wire Gauge (AWG) - correct answer-Roughly represents the number of
steps that were involved in the process of wire drawing.
Smaller Numbers: Larger wires (fewer drawing steps are involved)
Larger Numbers: Smaller wires (more drawing steps are involved)
,A gauge change of 3 numbers: Doubles or halves the conductors resistance and
cross sectional area
A gauge change of 6 numbers: Doubles or halves the conductors diameter
Resistance, Inductance, Capacitance and Impedance - correct answer-Resistance:
the property of a conductor to resist the flow of electricity through it. Expressed in
Ohms - One ohm of resistance will allow 1A of current to flow when 1 V of electrical
pressure is applied where V is voltage in volts, I is current in amperes, and R is
resistance in ohms. Resistance changes in proportion to length. High temperatures
increase the conductors resistance by approximately 2% for each 10 degrees
Fahrenheit (5.5 C).
Inductance: a property of an electromagnetic field built around a conductor that
opposes any changes in current flow in a circuit, both ac and varying dc. The basic
unit of inductance is a Henry (H). Inductive coupling is the transfer of energy from
one circuit to another through this field. Inductive reactance is a force that opposes
change in the direction of current flow on a conductive path. Is measured in ohms.
Directly proportional to the frequency.
Capacitance: a property of conductors that allows storage of electric charges when
potential differences (voltages) exist between conductors. Cause a voltage difference
between two wires when separated by insulation, resulting in a buildup (or storage of
electric charges) of capacitance between the wires. Is measured in farads (F).
Normally measured in microfarads (one millionth of a farad), nanofarads (one
billionth of a farad), or picofarads (one trillionth of a farad).
Impedance (Z): in AC circuits, the total opposition to current flow. Measured in ohms
- the combined effects of resistance, inductive reactance, and capacitive reactance
of the circuit.
Characteristic Impedance: the input impedance of a uniform analog transmission line
of infinite length. Impedance mismatches can cause: Attenuation, distortion, or
corruption of transmitted and received signals. Most balanced twisted-pair cabling
used for ICT exhibits a charact
1st step in setting up cable - correct answer-is to secure the area
1st step when pulling horizontal cable - correct answer-in conduit is to choose a
method of establishing cable run distance.
in an open ceiling is to verify the manufacturer's specifications for cable tensile
strength limitations.
The preferred method for installing Backbone Cables. - correct answer-Top Down
, Maximum Cable Run Distance - correct answer-90 M (295 Ft)
Maximum single conduit segment - correct answer-no more than 30 M (100 ft)
number of 90 degree bends per 100 ft in and bend radius of conduit - correct
answer-no more than 2 90's
2 inches or less 6 times internal diameter
2 inches or more 10 times the internal diameter
Cable Bend Radii - correct answer-1 Patch cord 1
4 Pair Cable 4
Multi pair cables 10
Coax Flexible 6
Coax semi-rigid 20
Optical Fiber up to 4 strands at rest 1 inch
Optical Fiber up to 4 strands during pull 2 inches
intrabuilding optical fiber 15 times during install
Fill Ratio - correct answer-1 Cable 53%
2 cables 31%
3 or more cables 40%
40% New Installs
60% Max cables
The maximum pulling force for one 4 pair, 24 AWG cable - correct answer-25 lbf
Maximum pulling tension of a 4 pair, 24 AWG cable - correct answer-110 Newton
is not used for pulling cable into a pipe - correct answer-Fishtape
Method for attaching pull string - correct answer-Verify tensile strength (330 N-75 lbf
to 880 N-200 lbf)
Select appropriate extender tool (Telescoping poles reach from 2 M-6.5 ft to 8 M-26
ft)
using a minimum of 3 half hitches and a knot.
Do not attach tools to pull string and throw them through the ceiling.
A safer option is to attach the string to a roll of tape or bean bag that can be tossed
above the ceiling tiles.
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