OSP Network Architecture & Design Standards 2 — Questions and Answers
Question 1: In a fiber-to-the-premises (FTTP) architecture, what component splits the optical signal from a single feeder fiber to multiple distribution fibers?
- Optical line terminal (OLT)
- Passive optical splitter (Correct answer)
- Optical network unit (ONU)
- Wavelength division multiplexer
Correct answer: Passive optical splitter
A passive optical splitter divides the optical signal from a feeder fiber to multiple distribution fibers without requiring power.
Question 2: Which OSP design standard specifies minimum bend radius requirements for single-mode fiber cables during installation?
- TIA-568
- TIA-590
- TIA-598
- TIA-5017 (Correct answer)
Correct answer: TIA-5017
TIA-5017 provides specifications for optical fiber, including minimum bend radius requirements to prevent signal loss or fiber damage.
Question 3: A network designer is planning a GPON deployment. What is the maximum logical reach defined by the ITU-T G.984 standard?
- 10 km
- 20 km
- 40 km (Correct answer)
- 60 km
Correct answer: 40 km
ITU-T G.984 defines a maximum logical reach of 60 km for GPON, though typical deployments are 20 km.
Question 4: What is the primary purpose of a network topology map in OSP design?
- To document underground conduit depths only
- To show logical and physical relationships between network elements (Correct answer)
- To list all equipment serial numbers
- To calculate fiber attenuation budgets only
Correct answer: To show logical and physical relationships between network elements
A network topology map documents both the logical relationships and physical layout of network elements to guide installation and troubleshooting.
Question 5: In a ring topology OSP network, what is the key advantage over a simple point-to-point design?
- Lower fiber count requirements
- Built-in redundancy allowing traffic to reroute if a segment fails (Correct answer)
- Simpler splicing requirements
- Reduced splitter ratios
Correct answer: Built-in redundancy allowing traffic to reroute if a segment fails
Ring topology provides path redundancy so that a single cable cut allows traffic to reroute in the opposite direction around the ring.
Question 6: Which ANSI/TIA standard governs the installation of telecommunications outside plant cables?
- TIA-568-C
- TIA-758 (Correct answer)
- TIA-607
- TIA-942
Correct answer: TIA-758
TIA-758 is the ANSI/TIA standard covering customer-owned outside plant telecommunications infrastructure.
Question 7: A designer must provide 99.999% availability for a critical OSP network link. Which architecture best achieves this?
- Single fiber route with redundant electronics
- Geographically diverse fiber routes with automatic protection switching (Correct answer)
- Increased fiber count on a single route
- Deploying additional amplifiers on a single path
Correct answer: Geographically diverse fiber routes with automatic protection switching
Geographically diverse fiber routes with automatic protection switching ensure that no single physical event (dig, weather) can disable both paths simultaneously.
OSP Network Architecture & Design Standards 2
In a fiber-to-the-premises (FTTP) architecture, what component splits the optical signal from a single feeder fiber to multiple distribution fibers?