OSP Fiber Optic & Copper Cabling Systems 4

Question 1

What is 'chromatic dispersion' in single-mode fiber and why does it matter in OSP design?

Accepted Answer

Pulse spreading caused by different wavelengths traveling at different speeds, limiting bandwidth-distance

Answer

Chromatic dispersion causes optical pulses to spread as different wavelength components travel at slightly different velocities, becoming a bandwidth-limiting factor in high-speed, long-distance links.

Question 2

When designing a fiber distribution hub (FDH) for an FTTH network, what is the primary function of the splitter inside?

Accepted Answer

To passively divide a single feeder fiber signal among multiple drop fibers

Answer

A passive optical splitter in an FDH divides the feeder fiber's optical power among multiple subscriber drop fibers without requiring electrical power.

Question 3

The '3 dB rule' in copper cable design refers to the frequency at which:

Accepted Answer

Insertion loss equals 3 dB, defining the cable's usable bandwidth

Answer

The 3 dB bandwidth point is where insertion loss equals 3 dB (half power), commonly used to define the upper frequency limit for a given cable type and length.

Question 4

In outside plant design, a 'slack loop' of fiber cable is stored in a splice enclosure primarily to:

Accepted Answer

Provide extra cable for future re-splicing, repairs, or rerouting

Answer

Slack loops give technicians enough cable to open an enclosure, work comfortably, and re-splice if a fusion splice must be redone without running new cable.

Question 5

Which test is used to verify that all conductors in a multi-pair copper cable are correctly connected with no shorts, opens, or reversed pairs?

Accepted Answer

Wiremap test

Answer

A wiremap test verifies pin-to-pin continuity and detects opens, shorts, crossed pairs, reversed pairs, and split pairs in copper cable installations.

(OSP) Outside Plant Designer Practice Test

(OSP) Outside Plant Designer Practice Test

OSP Fiber Optic & Copper Cabling Systems 4