UPDATED Fiber Install and Activation 100% SOLUTIONS REVISED 2023//2024

Which standards organization is considered to be the creator of the worlds' most recognized communications standards, known as "recommendations"? - ANSWERS The International Telecommunications Union (ITU) In which component in a fiber-optics communication system do changes to the intensity of the optical signal occur? - ANSWERS The optical transmitter What is a drawback of using Fabry-Perot (F-P)lasers in high-speed data (HSD) networks? - ANSWERS The emission of a number of discrete wavelengths or side modes. Why are laser diodes most effective when coupled to singlemode fiber? - ANSWERS Its high coupled power, directionality, and speed. What are the factors that contribute to an optical receiver's sensitivity? - ANSWERS Noise, responsivity, response time, linear response, back reflection, optical detector. What is a positive-intrinsic-negative (PIN) diode? - ANSWERS An optical detector with current flow that is linear to the intensity of light photons, with one electron/hole pair created for every absorbed photon until saturation. What does the amplification process in an avalanche photodiode (APD) introduce into the electrical output of an optical detector? - ANSWERS Noise What function does the detector in an optical receiver perform? - ANSWERS Conversion of an optical carrier to an electrical signal, and demodulation of the modulated optical carrier. What happens if the optical signal exceeds the maximum specified input power into a photodetector? - ANSWERS Nonlinear operation resulting in distortion, data errors, and signal loss. What is a characteristic of light in a laser beam? - ANSWERS The laser beam consists of a limited range of wavelengths (monochromatic), with all light waves in phase (coherent light). Monitoring the status of optical nodes - ANSWERS Involves the use of a node transponder that continuously monitors a number of critical functions. Digital return path transmissions - ANSWERS Use dense wavelength division multiplexing (DWDM) digital return transmitters in hub-to-headend architectures. What is channel bonding? - ANSWERS A 3.0 revision to DOCSIS that significantly increases upstream and downstream transport data rates. What is MPEG? - ANSWERS A universally accepted standard for digital television, first released in 1992. Which of the following is true about optical nodes? - ANSWERS They contain four main sections: the optical receiver, the RF amplifier module, the reverse optical transmitter, and the DC power supply. Internet protocol telephony systems in broadband cable networks - ANSWERS Require a call management server, media gateway, signaling gateway, billing system, and CMTS. In a centralized server video-on-demand architecture - ANSWERS The number of servers needed for video content storage is smaller than in the distributed server architecture. Which of the following statements about local ad insertion is true? - ANSWERS Local ad insertion is performed usually by a video server. In regard to providing high-speed data service, - ANSWERS The CMTS can provide a data transfer rate up to 38 Mbps, using 256-QAM in a single 6Mhz channel. Which of the following is true about the SONET transmission standard? - ANSWERS SONET is the North American standard used for telephony applications.