What is unique about WDM - PON ? - correct answerWDM-PON deployed in a greenfield system allows each subscriber to get their own designated
... [Show More] wavelength.
What is the main benefit of deploying WDM technology? - correct answerIt will increase the capacity of the existing fiber networks tenfold without adding any more fiber.
How are optical splitters used in the forward path? - correct answerAs passive branching devices that divide an optical signal across multiple output fibers.
What is the purpose of a fiber demarcation box? - correct answerIt provides a safe place to splice, split, distribute, store, and cross-connect fiber optics.
What is the purpose of the MST? - correct answerIt provides access to connect fiber-optic cable drops from the customer premises to the network.
What is the one main function of the FDH? - correct answerThe FDH provides effective fiber management by grouping
splitters into local serving areas
Which PON element uses patch panels? - correct answerODN
Which type of fiber topology used in a PON places the PON
splitters at the headend while providing one designated fiber
for every customer premise? - correct answerHome-Run
What are the three categories of the fiber-optic cable used to identify the location of the fiber in the network? - correct answerTrunk, branch, and drop.
What is the difference between the FTTN and FTTC
topologies? - correct answerAn FTC is allowed a smaller number of RF amplifiers between
the optical fiber and the customer premises.
What is the purpose of the SDU? - correct answerIt provides surge protection, a test jack, circuit protection, wiring management, and fiber termination.
What are the advantages of loose buffer tube fiber? - correct answerIt offers the best protection for the fibers under high pulling tension and moisture with its fiber-coated gel.
What is an ONU/ONT? - correct answerIt is a device that converts light from fiber to RF for coaxial
distribution into the home.
What are the characteristics of ITU-T G.657 BIF? - correct answerIt is flexible for installation in small spaces and has a small bend
radius of 7.5 mm or 10 mm.
What le true about using a premade fiber-optic pigtail for
splicing to patch panels or terminal equipment? - correct answerIt is faster and more rellable than installing eonnectors in the
field.
What is the proper way to handle fiber once it is spliced? - correct answerAt the heat-shrink protective sleeve that has a steel bar inside it.
What is the purpose of the ground block? - correct answerTo protect fragile electronics like TV's and STBs from damaging lightning strikes and power surges.
In a PON FTTx network, which OSP device contains fiber test
points that will minimize service disruption to customers? - correct answerFDH (Fiber Distribution Hub)
What parameter is critical in an OTDR when testing a PON with
significant splitters losses? - correct answerHigh Dynamic Range
What is the best approach to repairing an aerial fiber-optic
drop cable for FTTx applications? - correct answerReplace the entire section of fiber drop cable.
(-25) + (42) + (-62) + (20) =? - correct answer-25
(17) x (-19) =? - correct answer-323
-17-(-34)=? - correct answer17
-49 ÷ -7? - correct answer7
(20) ÷ (-4) + (-2) x (-10) - (-2) x (7) =? - correct answer29
3 6/9 + 6 1/3 + 9 5/9= - correct answer19 5/9
7 3/8 ÷7 1/4= - correct answer1. 1/58
8.13 X 0.123 =? - correct answer0.99999
0.5349 ÷ 0.1420? - correct answer3.7669014
67.84 + 81.786 + 4281.98 = ? - correct answer4,431.606
0.00004= ——- × 10 to the power of ——? - correct answer4,-5
What is the square of 7? - correct answer49
Which of the statements is true of axioms? - correct answerWhen A = C and B = C, then A = B because both are equal to C,
which supports the axiom: Quantities equal to the same quantity
are equal to each other.
Simplify and solve the equation: If E = IR, then | =? - correct answerE/R
What is the square root of 81? - correct answer9
0.00004= —— × 10 to the power of —— ? - correct answer4,-4
(83 × 10^ 6) + (27 × 10^7) = ? - correct answer353 × 10^6
(480 × 10^-5) divided by (60 x 10^-3) = ? - correct answer8 × 10^-2
(250 x 10^-6) - (7 x 10^-5) = ? - correct answer180 x 10^-6
(75 × 10^3) + (25 x 10^4) =? - correct answer32.5 x 10^4
(10 x 103) + (26 x 104) = ? - correct answer270 x 10^3
Why should you take the time to take notes
and accurately record data at each job
location? - correct answerNotes and recorded data are tools that can help you accurately remember events at a site that can help you determine a plan of action or evaluate the decisions you made.
You are at a customer's home, and you are
asking the customer whether the problem is
intermittent or constant. Which steps are
you using from the six-step troubleshooting
process? - correct answerIdentify the problem
Which technique can be useful in helping others understand
your emotional state and in providing them with direction
around how to help you restore balance? - correct answerFeel, Felt, Found technique.
Which of the following best describes stereotyped thinking? - correct answerPresuming that all members of a group have certain characteristics.
The attribute of being "active" as a critical thinker means - correct answerYou observe and take notes relevant to the issue.
It is essential to pay attention to warning signs of stress
overload. Poor attitude is one of the behaviors that may
indicate that you are overstressed. What are the symptoms of
poor attitude behavior? - correct answerA significant change in attitude with a noticeable movement toward negative, hostile, cynical, or paranoid thoughts
You are at a customer's home, and you believe you have
solved the problem. When you check to ensure the resolution
did not introduce any new problems, which step are you using
from the six-step troubleshooting process? - correct answerVerify the solution
To break the habit of a negative self-talk cycle - correct answerTell yourself "not now" and move onto a positive thought whenever negative thoughts occur.
By taking control of the expectations you have, you are - correct answerMore likely to improve your motivation and be a better problem solver.
Which of the following statements describes creative
problem-solving? - correct answerThinking outside of the box and looking at problems from a fresh perspective.
What is done to ensure equal power in all
channels in a network with analog and digital
modulation channels? - correct answerOperate the analog TV channels at higher amplitude level than the QAM channels
What does a set-top box (STB) diagnostic page of a quadrature amplitude modulation (QAM) channel showing signal-to-noise ratio (SNR) near or below 30 dB indicate? - correct answerThe QAM channel quality is on the edge for reliable reception, and the source of the problem is likely in the distribution network or customer premises.
Which of the following characterizes the successful
troubleshooter? - correct answerSomeone with an inquisitive and relentless desire to solve and fix problems.
What must a technician be aware of when analyzing a digital TV (DTV) problem? - correct answerThere is frequently more than one contributor to a specific DTV service problem.
After a digital TV (DTV) service problem has been analyzed and possible causes considered, what is accomplished by isolating the various network elements? - correct answerIt narrows the scope of likely problem sources.
During which step of the six-step troubleshooting process for
a digital TV (DTV) service problem are quadrature amplitude
modulation (QAM) channel measurements typically taken? - correct answerDiagnosing symptoms.
When replacing a splitter to resolve a digital TV (DTV) service
problem, what does confirming the splitter output levels
before attaching the output connectors do? - correct answerConfirmation reinforces the technician's confidence that the problem will be resolved by replacing the splitter.
Which of the following digital TV (DTV) trouble calls could
have been avoided with customer education about the
product? - correct answerThe digital set-top box (STB) overheats.
When troubleshooting a digital TV (DTV) authorization issue,
what can be verified using the set-top box (STB) diagnostic
page? - correct answerSTB reception of authorization message data.
Which type of set-top box (STB) operates more like Data Over Cable Service Interface Specification (DOCSIS) cable modems with return channels on the same frequencies used for cable modems? - correct answerSTB with DOCSIS Set-top Gateway (DSG) client software and embedded DOCSIS modems.
How does IP multicast differ from IP broadcast? - correct answerIP multicast traffic is only sent to specific modem addresses on the network; IP broadcast traffic is sent to all modems on the network.
What layers of the OSI reference model are
specific to cable networks and are present
onlv between DOCSIS modems and the
CMTS? - correct answerLayers 1 through 4 (Physical layer, Data Link Layer, Network Layer, and Transport Laver) are
applied between the DOCSIS modem and CMTS.
Which DOCSIS layer is used by the CMTS to differentiate
between cable modems? - correct answerThe Docsis MAC layer
What was introduced in DOCSIS 3.0 to allow enough
bandwidth for upstream carriers from previous DOCSIS
versions? - correct answerThe option to increase the top frequency of the upstream to 85
MHZ.
In a DOCSIS network, why is the data throughput over the return or upstream path typically less than the throughput of data over the forward or downstream path? - correct answerCompared to the downstream path, the narrower bandwidths
and lower orders of modulation used to transport data over the
return path cause the downstream and upstream data
throughput to be unequal or asymmetrical.
What would be the downstream throughput if two QAM
channels with a throughput of 38 Mbps were bonded? - correct answer76 Mbps.
What are two features that were added in DOCSIS 3.1 to
extend the viability of HFC networks into the next decade? - correct answerOFDM and LDPC.
Which step in the troubleshooting process requires a
discussion with the customer to gather more detail about the
problem? - correct answerStep 1: Identify the problem.
When analyzing a problem, what can the technician learn by
asking the customer to show or demonstrate the problem? - correct answerThe symptoms of the problem can be viewed and any unusual screens or customer entries can be identified.
When using a digital signal analyzer to troubleshoot data
throughput im the DOCSIS network, what is the minimum MER
into the cable modem for a 256-QAM carrier? - correct answer32 dB or greater
How should the digital multimeter (DMM) be used to troubleshoot problems in the telephone wiring? - correct answerUse tie voltmeter fumction, both the network interface device
(NID) and the embedded multimedia terminal adapter (EMTA)
provide a steady On-hook voltage.
If the telephone wiring is in the bus topology and the twisted-pair cable tester is connected at the embedded multimedia terminal adapter (EMTA) with the remote unit connected to the last outlet in the loop, what is the quickest way to locate the incorrectly wired outlet if the tester indicates a wiring error? - correct answerBreak the loop into smaller sections and retest the two sections to identify which one has the wiring error. Continue to divide the section with the error into smaller sections until the wiring error is identified.
After resolving the problem with the premises wiring issue, which of the following is the next step in the six-step process that the technician should take? - correct answerVerify that the problem has been resolved and that phone service [Show Less]