OSP Route Planning & Infrastructure Deployment 2 — Questions and Answers
Question 1: When evaluating an aerial vs. underground route for a fiber deployment, which factor most significantly favors the underground option?
- Lower initial installation cost
- Reduced exposure to weather-related outages (Correct answer)
- Faster permitting turnaround
- Easier future capacity upgrades
Correct answer: Reduced exposure to weather-related outages
Underground routes are far less susceptible to ice, wind, and storm damage, resulting in fewer outages over the cable's lifetime.
Question 2: A route survey reveals an existing conduit bank that is 80% fill capacity. What is the OSP designer's best course of action?
- Install cables until the conduit reaches 100% fill
- Plan a new parallel conduit run alongside the existing bank (Correct answer)
- Use smaller-diameter cables to fit in remaining space
- Reroute entirely to avoid the congested segment
Correct answer: Plan a new parallel conduit run alongside the existing bank
Industry practice limits conduit fill to avoid heat buildup and pulling difficulty; a parallel conduit run provides needed capacity without violating fill limits.
Question 3: Which document is typically required from a municipality before boring under a public street for OSP conduit installation?
- FCC Form 477
- Right-of-way (ROW) permit (Correct answer)
- Environmental Impact Statement
- NEPA categorical exclusion letter
Correct answer: Right-of-way (ROW) permit
A right-of-way permit grants legal permission to disturb public property and specifies restoration requirements.
Question 4: A fiber route must cross a railroad track. Who typically grants the crossing license?
- State department of transportation
- FCC
- The railroad company (or its ROW agent) (Correct answer)
- Local city council
Correct answer: The railroad company (or its ROW agent)
Railroad companies own their right-of-way and must issue a crossing license or encroachment agreement before any utility may cross.
Question 5: What is the primary purpose of conducting a bore feasibility study before planning a horizontal directional drill (HDD)?
- To determine cable tensile strength requirements
- To assess soil conditions and obstructions that affect drill path design (Correct answer)
- To calculate the number of splices needed
- To estimate future bandwidth demand
Correct answer: To assess soil conditions and obstructions that affect drill path design
Soil borings and geotechnical data reveal rock, groundwater, and buried obstacles that dictate drill path angle and equipment selection.
Question 6: When planning a lashed aerial cable deployment on existing strand, the designer must verify the strand's rated breaking strength (RBS) supports the additional load. Which additional load factor is most commonly overlooked?
- Cable weight per foot
- Ice loading per local weather zone (Correct answer)
- Wind loading
- Messenger sag
Correct answer: Ice loading per local weather zone
NESC loading zones define ice accumulation requirements; ice adds far more weight than cable alone and is frequently underestimated in route planning.
Question 7: A route plan calls for placing a pedestal in a residential area. Which placement consideration takes highest priority?
- Minimizing cable length from the central office
- Compliance with ADA clearance and local setback ordinances (Correct answer)
- Maximizing splice count efficiency
- Proximity to power outlets
Correct answer: Compliance with ADA clearance and local setback ordinances
Pedestals must not obstruct sidewalks or violate ADA and municipal setback rules, which can result in removal orders if ignored.
OSP Route Planning & Infrastructure Deployment 2
When evaluating an aerial vs. underground route for a fiber deployment, which factor most significantly favors the underground option?