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19 Cards in this Set

  • Front
  • Back
446. What type of tag is placed on bonding conductor used to bond cable sheilds and telecommunications equipment?
Ground warning tag
446. Why is the LAN cabling grounded to the TBBC?
To provide for personnel safety, equipment protection, and noise reduction
446. What is installed in every intermediate cross-connect room of telecommunications closet to provide grounding for LAN cabling?
Telecommunications grounding bus bar
446. Where is the TMGB located?
In an accessible location within the entrance room
446. What is the preferred compression-type end connector used for terminating the ground conductor?
Two hole
446. How much separation from the mounting surface is required when installing a grounding bus bar?
2 inches
446. What are the two catagories of fire-stop systems?
mechanical and nonmechanical
446. For what do nonmechanical fire-stop systems provide protection?
Conduit and cable penetrations through concrete, and masonry, walls or floors; fiber optic cable with an innerduct through a concrete wall or floor, conduit and cable penetrations through gypsum (sheetrock) wallboards
447. What two reasons support the certification of LAN media?
First, it identifies and allows you to have cable problems corrected prior to accepting the LAN cables secondly, it provides a guarantee of the cable's transmission characteristics and serviceability
447. What five tests are accomplished on twisted pairs?
DC resistance, mutual capacitance, characteristic impedance, attenuation, and NEXT
447. What are the two tests you are responsible for on UTP and STP media?
Attenuation and near-end crosstalk
447. What causes attenuation?
Electrical characteristics of the wire transmission medium, terminations and cross-connects, and signal reflections caused by impedance mismatches
447. Why do cable manufactureers perform NEXT tests?
To classify the cable's performance category
447. What can be the causes of NEXT on an installed cable?
Poor cable termination practices or the excessive twisting and bending of the cable during installation
447. What type of tests are used for a 10Base2 LAN distribution system?
Characteristic impedance, attenuation, velocity of propagation, edge jitter, and DC loop resistance
447.When verifying the length of RG-58-series coaxial cables, why do you need to know the composition of the dielectric material used to separate the center conductor from the sheild?
To obtain the most accurate length measurement
447. What is the maximum dB loss per kilometer on a singlemode fiber optic backbone cable installed between two buildings?
0.5 DB
447. What are the two causes of return loss?
The quality of the manufactured cable and breaks in the fiber optic cables such as splices and terminations
446. Describe the conductor used for grounding.
No. 6 AWG copper conducter with a green outer insulation.