Maintance Tech 2-3 Conventional Questions And Answers 2023

In a hybrid fiber/coax HFC fiber optic node, what are common voltages produced by DC power supplies? - Correct answer-Common Voltage includes +5, +12 and +24 VDC Why do many optical nodes accept two independent power supplies? - Correct answerFor redundant Powering of the node. What is an option available on most optical nodes for connectin to the power supply? - Correct answer-Through a power cable that is connected from the power supply directly to the power port of the node. Which of the following is true of a Centralized power node? - Correct answer-It can provide sufficient power for a fiber-optic node, including outside plant amplifiers and customer premis network interface devices (NID) for telephony service. Why is -48VDC with positive ground used by the telecommunications industry? - Correct answer-This reverse polarity is means of mitigating electrolytic corrosion on the outside plant. Why are backup AC generators included in many commercial AC uninterruptible power supply (UPS) and DC power systems? - Correct answer-To provide AC power in the event of a prolonged utility power interruption. What is true of the following types of uninterruptible power supplies(UPS)? - Correct answer-The offline type routes. which of these are concerns for radio frequency over glass (RF0G) and, fiber-to-thex(FTTx) systems? - Correct answer-Consideration of how and who will provide AC power to the optical network terminal (ONT) at the customer premises. What is true of online uninterruptible power supply (UPS) systems? - Correct answerThey are recommended for commercial applications such as data centers and telecommunications operations. The number of rectifiers used in a DC power plant design. - Correct answer-Is dependent upon the load placed on the system. What is a benefit of using point-to-point(P2P) topology instead of a point -tomultipoint(P2MP) topology? - Correct answer-P2P topologies are more stable than P2MP topologies. The 10G-EPON acces architecture supports two data rates in the upstrean what are they? - Correct answer-1 Gbps and 10 Gbps What is the maximum data rate the XG-PON1 (10G-PON) access architecture supports in the upstream? - Correct answer-2.5 Gbps. What is one of the requirements that have been identified for next-generation access network architectures? - Correct answer-Increased power consumption. what is the core objective of docsis provisioning of EPON or DPoE, access architecture? - Correct answer-To make the EPon Elements appear and operate as DOCSIS elements to existing DOCSIS-based back office provisioning operations. Which element of passive optical network consists of downstream (forward path) optical transmitter, an upstream (returnpath) receiver, and a multiplexer/demultiplexer? - Correct answer-Optical line terminal (OLT) Which types of passive optical network (PON) acces architecture replaced asynchronous PON (APON). - Correct answer-Gigabit-capable PON (GPON). Which type of passive optical network (PON) architecture was formed to develop a costeffective, high-bandwidth, easy-toprovision solution for connecting businesses, schools, libaries, and customer local area networks to the public internet? - Correct answerEthernet PON (EPON) what is it abount radio frequency over glass (RFoG) that made broadband cable operators envision using it to make a seamless transition from the lagacy hybrid fiber architecture over to gigabit-capable passive optical network or ethernet passive optical network? - Correct answer-RFoG can operate in parallel with GPON and EPON, operating independent of the PON communications protocols and data rates. Which type of optical coupler provides the least amount of insertion loss? - Correct answer-Fused. typically, what is the first step to take when adjusting an optical receiver? - Correct answer-Turn on the optical receiver. What are the main elements of an optical receiver? - Correct answer-Demodilator, electrical interface, optical detector, optical interface. in networks transporting data rates that are higher than _____, Fabry-Perot (F-P), lasers are considered inadequate. - Correct answerWhat is one process that has to happen before digital modulation can occur in an optical transmitter? - Correct answer-The data must be encoded. What are the main elements of an optical transmitter? - Correct answer-Data encoder/modulator, electrical interface, laser,optical interface. Which type of optical amplifier produces no measurable distortion to the modulated light wave? - Correct answer-Erbium-doped fiber amplifier (EDFA) Which component of a digital optical network is used to receive digital modulation light wave and convert them to an electrical signal. - Correct answer-Optical Transpoder. Why are the amplitude levels into an optical transmitter different between analog television and quadrature amplitude modulation carriers? - Correct answer-Because analog carriers have a video sync pulse which can be used to set amplitude QAM carriers don't have a sync pulse the average power of the carrier is used to adjust the QAM carriers amplitude. Which fusion splicer alignment method uses a camera to align the optical fibers before splicing? - Correct answer-The profile alignment system (PAS) method What step should be performed at the beginning of every fusion splicing operation? - Correct answer-Make a number of test spliced to set up the fusion splicer and to verify the instruments settings and calibration for both the environment and the type of fiber to be spliced. The quality and attenuation value of a mechanical splice of optical fibers is dependent on which tool during the preparation process. - Correct answer-The quality and attenuation of the mechanical; splice of optical fibers is dependent on the quality of the cleaving tool. If tight-buffered distribution fiber optic cable is installed between the master splice panel in optical entrance enclosure and a rack mounted fiber optic distribution panel where is the facility must the distribution panel be located? - Correct answer-The distribution panel can be located anywhere in the facility since the distribution cable complies with indoor code requirements for riser or plenum installations. When preparing fiber optic cable for connection to a patch panel how much buffer tube and fiber slack should be provided. - Correct answer-Leave enough slack in the buffer tubes to allow the splice trays to reach the splicing equipment and enough fiber slack to store on individual trays for later additions mover and changes. Why are Velcro straps preferred over standard plastic tie wraps when bundling pigtails for storage in a splice panel? - Correct answer-Because Velcro straps are removable and can hold the pigtails together without placing undue strain on the optical fibers. When would a mid entry splice in a fiber optic network be used? - Correct answer-In a self healing ring network that requires only two fibers to feed an optical fiber drop. What are some prerequisites before performing a fusion splice of optical fibers? - Correct answer-A controlled environment such as a splicing can trailer or tent and a stable work surface that is large enough to accommodate the fusion splicer tools and the splice closure. Which type of fusion splicer is ideal for fiber to the x FTTx splicing? - Correct answer-the fixed V groove splicer Why might a technician who is troubleshooting an outage in an optical network want to refer to the networks as built documentation - Correct answer-It will help the technician determine specific cable lengths. What information should always be included in fiber optic network documentation - Correct answer-fiber assignments When activating a fiber optic network which acceptance testing sage includes adjusting attenuation levels for the first time. - Correct answer-During equipment activation. What is one example of a stipulation in a franchise agreement that would affect network design. - Correct answer-a 100% fiber optic network How many meters of slack cable are typically used in an aerial installation. - Correct answer-15-25 meters Which type of map contains node information. - Correct answer-design map Which of these items should be identifies on a route map. - Correct answer-parks What is a design option for a broadband cable network to maximize the use of its optical fiber resources. - Correct answer-leasing spare fibers What is the ideal way for a broadband cable network designer to plan the replacement of coaxial cable with fiber optic cable to shorten amplifier cascades. - Correct answeruse the existing coaxial network infrastructure. Which category of fiber optic cable design typically uses some variation of the star topology. - Correct answer-signal distribution As changes are introduced to a fiber-optic network, - Correct answer-Documentation must be updated to reflect the new configuration and performance data. When testing the fiber-optic plant, - Correct answer-An optical power meter is used to measure the strength of light signals anywhere in a fiber system where a connection can be made. The troubleshooting process - Correct answer-Should include steps that identify, analyze, and locate the problem as well as diagnose its source, repair the problem, and test to ensure the problem is resolved What is the best way to prevent problems in outside fiber-optic splice enclosures? - Correct answer-The outer jacket and the internal cable structures must be secured individually to protect the closure and splice trays from the effects of expansion and contraction A fiber-optic network maintenance plan should be developed with which of the following in mind? - Correct answer-The task of compiling the physical document must become the responsibility of an identifiable position or organization In a fiber-optic network, - Correct answer-The role of maintenance is to proactively maintain network tolerances and recognize, locate, and remedy potential problems. During installation of fiber-optic cable, what does damage to the cable jacket cause? - Correct answer-moisture migration into the cable What are potential sources of problems in aerial installations? - Correct answer-Falling branches, pole attachment problems, and improper sag and loading considerations. Improper use of nylon tie wraps can induce this problem: - Correct answer-Microbends What topology do most fiber-to-the-user (FTTx) networks use which requires greater fiber color code management in its documentation? - Correct answer-Point to multipoint (P2MP) Where would you expect to install a mid-entry splice in a fiber-optic cable network? - Correct answer-A location where a select number of optical fibers need to be spliced, and the remaining buffer tubes and fibers remain untouched. When splicing fiber-optic cable, why is it a good safety practice to clean off fiber strippers and other hand tools after each use? - Correct answer-To prevent the accidental transfer of fiber debris or fiber chips onto clean hands. What is the purpose of buffer tubes in fiber-optic cable? - Correct answer-Buffer tubes protect and separate the optical fiber in smaller bundles. How are optical splices secured in a splice tray? - Correct answer-Retaining clips hold optical splices in place in a splice tray. How should the buffer tubes be secured in the closure? - Correct answer-The buffer tubes should be secured with tie wraps so that there is no movement of the optical fibers inside the buffer tube.