VDV: Applications and Installation (Part 3 of 3)
Blown fiber _____.
-allows for additions to the installation to be made at a later time -an installation method in which a housing containing many smaller tubes is installed without fiber -is typically used for underground installations
Certification testers _____.
-are the only testers that can be used to certify network cabling -test instruments used to test and certify cables in a system in order to obtain a warranty from the structured cabling system OEM -can perform many of the functions of a qualification tester -can perform many of the functions of a verification tester -must be factory calibrated periodically in order to maintain the level of accuracy required for certification tests
When pulling cable, the maximum tension should not exceed _____.
25 ft-lb
The smallest conduit that can be installed on commercial or industrial projects is _____ trade size.
3/4"
In a Tier _____ data center, all the components are fully fault-tolerant, including uplinks, storage, chillers, HVAC systems, and servers.
4
The TIA recommends limiting the fill of a cable tray to _____.
50%
A typical patch panel provides the termination and patching point for _____ duplex connections.
6
The _____ standard covers the administration of a telecommunications infrastructure.
ANSI/TIA 606
A network must be active when undergoing a qualification test.
False
Containing fire, smoke, and gases provides less time for occupants to safely exit a building and firefighters to extinguish the fire.
False
Glass can conduct electricity.
False
Handwritten labels are acceptable as a final label for cable or telecommunication outlets.
False
Removing cables from their ports is required to complete a blinking diagnostic test.
False
TRs are typically larger than ERs.
False
Tip conductors terminate on the even-numbered rows, and the ring conductors terminate on the odd-numbered rows.
False
Wiremap testers are intended for use on active telephone systems, active telephone equipment, and AC circuits.
False
_____ cables are those that are routed from a telecommunications room to individual work areas (computers).
Horizontal
Open-air cable pulling involves pulling cable through _____.
I. a series of J-hooks II. a series of rings and loops
MTP connectors are _____.
I. a variation of MPO connectors II. ideal for high fiber-count data center and parallel-optical connections between servers III. used specifically for indoor cabling and device connections
A cable support system _____.
I. are normally installed by VDV technicians II. may be installed by electricians if the system requires extensive use of conduit III. must be in place before a cable can be installed
A qualification tester _____.
I. are sometimes referred to as network testers II. can be used on coaxial cable III. can be used on twisted-pair cable
The three steps for cable installation are _____.
I. cable penetration firestopping II. cable preparation III. cable pulling
Wiremap testers _____.
I. can be used with coaxial cables II. can be used with twisted-pair cables III. can identify active Ethernet ports IV. consist of two separate elements, a wire mapper and a remote unit
The two most common types of verification testers are toners and wiremap testers.
True
When terminating an F-type connector, the outer barrel of the connector should cover the braid.
True
A _____ separates a group of strands from other groups for protection and identification purposes.
buffer tube
The minimum bend radius for four-pair twisted cable should be _____ the cable diameter.
four times
The most common termination performed by a VDV technician is the termination of _____ twisted cable.
four-pair
A _____ splice uses heat to join the two strands.
fusion
A(n) _____ is a device that uses a high-voltage electrical arc between two electrodes to heat and melt the ends of glass fibers in order to join them and form a continuous strand.
fusion splicer
A(n) _____ provides a connection point at the end of a fiber-optic cable and can accommodate multiple connectors.
housing enclosure
The most common tool used for IDC terminations is a(n) _____ tool.
impact / punchdown
As a signal is "split," signal strength _____.
is lost
After fanning out wire pairs and straightening each wire, the next step in the termination process for a 110-style patch panel is to _____.
lace the wires into the 110 block according to the color code
A _____ is an end-to-end transmission path provided by a VDV cabling system.
link
When testing cables or bundles, the cable that produces the _____tone is the cable being tested.
loudest
A certification tester _____.
measures the length of a cable to determine if it complies with the associated standard
Proper cable management is _____.
more critical with fiber-optic cable than with copper cable because fiber-optic cable is more susceptible to damage
A(n) _____ pair is a fault that occurs in VDV cabling when one or both conductors of a pair are not connected.
open
A _____ is a set of devices used to route telecommunications cables from a telecommunications room or equipment room to a work area.
pathway
If a cable is run above a suspended ceiling used as an air handling space during open-air cable pulling, _____-rated cable must be used.
plenum
Raceways do not include _____.
plenum
In a fiber-optic network, _____ refers to the direction of transmission paths between the transmitters and receivers of channels.
polarity
To identify a wire pair using a toner, connect the _____ lead of the tone generator to one wire of the twisted pair.
red
When terminating four-pair twisted cable using 110 wiring blocks and C-4 connecting blocks, the first step is to _____.
route the cable to the row where it terminates
A _____ tester consists of two separate elements: a wire mapper and a remote unit.
wiremap
Tip conductors are _____for wire pairs 16 to 20.
yellow
When terminating an RJ-45 modular plug, technicians should strip approximately _____ of jacket from the cable.
2"
A through penetration _____.
-example would be a VDV cable that passes through a fire-rated floor -is a penetration that passes completely through a fire-rated element
A Tier 2 data center _____.
-has everything a Tier 1 data center has -helps to control a building's heating and cooling systems
Advantages of using a fiber-optic cable-management system includes _____.
-it provides physical protection for fiber-optic cables -the system provides a clear, well-defined path between equipment, cabinets, and racks -the system provides an easy access to the fiber-optic cables for troubleshooting, moves, additions, and changes
Per the TIA, the maximum length allowed for a conduit run is _____.
100'
A 66 block can accommodate up to _____ four-pair cables, leaving the bottom two rows unused.
12
A splice tray can typically hold up to _____ fused optical fibers.
12
Parallel optics typically use _____ fiber strands next to one another.
12
Coaxial cable consists of a(n) _____ center conductor, made of copper or copper-clad steel and surrounded by foam insulation.
18 to 22 AWG
A _____ width across the front is the standard size for a rack in the telecommunications industry.
19"
_____ is the reduction in power of any signal, light beam, or light wave, either completely or as a percentage of a reference value.
Attenuation
_____ is the ratio of signal strength to undesired signal noise in a twisted-pair cable, as measured at the far end of the cable.
Attenuation to crosstalk ratio far-end (ACR-F)
_____ fiber is an installation method in which a housing containing many smaller tubes is installed without fiber.
Blown
_____ are hardware devices used to organize the cables in a network system.
Cable racks
_____ testers can be used to certify network cabling.
Certification
A toner probe _____.
I. has an inductive probe, an amplifier, and a speaker with volume control II. is also known as an inductive amplifier III. produces an audible sound when it detects a signal from a tone generator
_____ loss is the loss or degradation of a signal in a VDV cable when a connector is inserted into another connector or associated hardware.
Insertion
_____ connectors have a free-floating ferrule.
MTP
_____ is the ratio of signal strength to undesired signal noise in a twisted-pair cable at the near end of multiple transmit pairs to an adjacent pair, as measured at the far end of the cable.
Power sum attenuation to crosstalk ratio far-end (PS ACR-F)
_____ is used for security equipment, surveillance equipment (CCTV), and older CATV installations.
RG-59
_____ is the first step when installing and terminating a copper VDV system.
Rough-in
Copper VDV cables (twisted pair and coaxial) originate in a(n) _____and are routed through various raceways and supports to work areas.
TR
A mechanical splice is adequate for most applications.
True
A terminated LC connector from one OEM will connect to an LC connector from another OEM.
True
Blinking the port of a hub or switch can help a VDV technician determine which port a cable is connected to.
True
Cable ties are not recommended for cable management as they can cause cable deformation over time.
True
Fiber-optic cables use light for signaling.
True
Firestopping is the process of sealing any penetration in a fire-rated building element in order to maintain its rating.
True
The Fiber Optic Association recommends not looking directly into the end of a fiber cable until verifying that there is no light source at the opposite end.
True
A "pass" or "fail" result of a qualification test is not based on _____.
attenuation
Ring conductor colors are _____ for the fourth pair of wires in a group of five.
brown
A _____ is the end-to-end transmission or communications path over which application-specific equipment is connected.
channel
The T568B termination pattern is more common in _____ installations.
commercial
When verifying that a twisted-pair cable and its data outlets are wired correctly using a wiremap tester, the first step is to _____.
connect the remote unit to the cable or data outlet
A telecommunication room's (TRs) primary function is to serve as a _____.
connection point between backbone and horizontal cabling
A _____ is a facility enabling the termination of network cables, as well as their interconnection with other cables or devices.
cross-connect
The most current OEM instructions are typically found on an OEM's _____.
website
Twisted-pair cable faults are caused by _____.
damage to the cable and improper terminations
A(n) _____ is a building or part of a building that is designed, built, and maintained specifically to house and connect computer servers.
data center
Qualification tests are performed to _____.
determine if a cable has sufficient bandwidth to support a particular network
A(n) _____ is a central space that serves telecommunications equipment for occupants of a building or a campus of several buildings.
equipment room (ER)
A(n) _____ pair is a fault that occurs in a VDV cable when the wire in one pair is interchanged with a wire in another pair.
split
A _____ cassette passes fiber-optic strands through in the same order as the incoming cable.
straight
A _____ is a device installed on the end of a VDV line that absorbs a signal to prevent signal leakage through an unused port.
terminator
Typically, the higher the cable category number, _____.
the higher the required cable performance level and the greater the number of certification test parameters
Standards for four-pair twisted cable specify _____.
the maximum length of a permanent link as 90 m and the maximum length of a channel as 100 m
With a shorted coaxial cable, _____.
the shield and center conductor are unintentionally connected and have electrical continuity
A _____ conductor is the first wire in a pair of wires.
tip
A _____ is a test instrument designed to identify and locate a copper conductor or cable.
toner
On large jobs, _____ set(s) of preprinted self-adhesive labels are generated by the VDV contractor.
two
Per the TIA, only _____ 90° bend(s) is/are allowed in a conduit run.
two
Originally, 66 blocks were designed to splice _____ cables.
two 25-pair
A(n) _____ tester is a test instrument designed to trace the path of conductors and confirm that conductors and data outlets are wired correctly.
verification
