NCTI Final Exam Maintance Tech 2-3 Conventional| New Update 2023/ 2024| Verified Questions and ANSWERs

NCTI Final Exam Maintance Tech 2-3 Conventional| New Update 2023/ 2024| Verified Questions and ANSWERs In a hybrid fiber/coax HFC fiber optic node, what are common voltages produced by DC power supplies? - ANSWER Common Voltage includes +5, +12 and +24 VDC Why do many optical nodes accept two independent power supplies? - ANSWER For redundant Powering of the node. What is an option available on most optical nodes for connectin to the power supply? - 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? - 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? - 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? - 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)? - ANSWER The offline type routes.