Fiber U

  The Fiber Optic Association, Inc.
the non-profit professional society of fiber optics

FTTX: Fiber To The Home, etc.

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Lesson # 5: Testing FTTx Networks


Level: Technician



 
Testing FTTx Networks

Objectives: From this self-study lesson you should learn:
  • How has the PON coupler change the way FTTx networks are tested?
  • What are the minimum testing requirements?
  • Why should you test at different wavelengths and in both directions?
  • What differences do you see with OTDR testing across a PON coupler?
  • How do you test how well the system is transmitting data?

New network architectures (PONs or passive optical networks) have been developed that allow sharing expensive components for FTTH. A passive splitter that takes one input and broadcasts it to as many as 32 users cuts the cost of the links substantially by sharing, for example, one expensive laser with up to 32 homes and only requiring an inexpensive laser at each home. However, this architecture changes the methodology of testing the complete installed cable plant and links for proper operation. Of course, individual links are tested as usual, it is the PON coupler that creates the difference.

The course leads you to read online or printed materials (with an emphasis on the online using the FOA Guide), watch FOA YouTube Videos, complete some activities and take the quizzes. Each lesson plan will be self-contained. Lesson plans open in new pages so the course overview page stays open to lead you to the next lesson or you may use the link at the bottom of the page.


Student Assignment

Read the references, watch the videos and take the quizzes (Test Your Knowledge)


Videos
FOA YouTube Videos, Fiber To The Home,  Not Applicable, Fiber Optic Testing
You may, if you wish, watch the entire video and then watch the referenced sections for a second time for greater comprehension.


Online FOA Reference
FOA Reference Guide to Fiber Optics, Testing FTTx Networks 

-or-

Reference Textbook
FOA Reference Guide to Outside Plant Fiber Optics, Appendix B,  Pages 236-8


Extra Credit Reading and Videos
Assignments beyond the basics required for the course will be listed as extra credit.

Overview of fiber optic testing, OSP and premises. 

YouTube Lectures Relevant To This Lesson Include:
FOA Lecture 12: Fiber Optic Testing Overview 
FOA Lecture 13: Testing Fiber Visually 
FOA Lecture 14: Testing Optical Power 
FOA Lecture 15: Five Ways To Test Fiber Optic Cable Plants 
FOA Lecture 16: Insertion Loss Testing 
FOA Lecture 17: OTDR Testing 
FOA Lecture 18: OTDR Setup 
FOA Lecture 19: OTDR Measurement Uncertainty 
Watch the ones which relate to issues you need to learn more about.

Test Your Knowledge
Online Quiz

Next Lesson:
Lesson Plan No. 6, Designing FTTx Networks






 


Table of Contents: The FOA Reference Guide To Fiber Optics

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