What are some commonly used techniques for extending spans and sections? (Multiple Choice)

Question

Options

• AOptical Amplification Technology
• BFEC Technology
• CLaser automatic shutdown technology

• A
  73% (46)
• C
  27% (17)

Explanation

Optical Amplification Technology (A) and FEC Technology (B) are both correct because they directly address the signal degradation challenges that limit how far a signal can travel. Optical amplifiers (like EDFAs) boost signal power along the fiber, compensating for attenuation and allowing signals to reach much greater distances before needing regeneration. FEC (Forward Error Correction) adds redundant coding to the signal so that bit errors accumulated over a long span can be detected and corrected at the receiver, effectively raising the acceptable noise threshold and permitting longer reaches.

Option C - Laser Automatic Shutdown (LAS/ALS) - is incorrect because it is a safety mechanism, not a performance-extending one. It automatically cuts laser output when a fiber break is detected to prevent hazardous radiation exposure, which has nothing to do with span distance capability.

Memory tip: Think of A and B as "push further" technologies - amplifiers push the signal stronger, FEC pushes the error tolerance higher. Laser shutdown is a safety stop, not a stretch.

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