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Fiber Optic Construction & Termination

Fiber Optic Construction & Termination. Jeff Hite University of Oregon/NSRC jeffh@uoregon.edu.

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Fiber Optic Construction & Termination

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  1. Fiber OpticConstruction & Termination Jeff Hite University of Oregon/NSRC jeffh@uoregon.edu This document is a result of work by the Network Startup Resource Center (NSRC at http://www.nsrc.org). This document may be freely copied, modified, and otherwise re-used on the condition that any re-use acknowledge the NSRC as the original source.

  2. Campus Fiber Plant Construction • Fiber Selection • Pathway Construction • Installation Guidelines • Termination

  3. Fiber Package Selection • Use outdoor cable between buildings • Armored Loose tube (to protect against rodents) • Un-armored loose tube in conduit if rodents not an issue • Indoor/Outdoor tight buffer if possible • Use indoor cabling inside buildings • tight buffer • Standardize Connectors • Multi mode: ST or SC (epoxy or hot melt) • Single mode: SC or LC (fusion Splice factory UPC pigtail) (Can hand polish for short runs <2 km)

  4. Fiber Optic Cable Construction • Fiber has bend radius issues • Keep bends > 10x cable diameter

  5. Fiber Optic Cable Construction • Leave slack loops, usually 10m per location

  6. Small Vault Slack Loop

  7. Closet Slack Loops

  8. Conduit Construction • Sizing Pathway • Bigger is better, allows installation of more than one cable package per conduit • Install additional runs of pathway (100% more than you need today) • Plan for the future, think of strand count • Install a pull-rope with the fiber  • Label conduits if possible • IdentifyingFiber • Label at each end, strand count, type and destination • Label slack loops, Where from? Where to?

  9. Conduit Construction Hints • For cable installed in underground conduit: • No more than 200m between pull points • Reduce distance by 50m for every 90 degrees of bend • Do not exceed 270 degrees • Survey the site and do the arithmetic • Very Important! Pull boxes or in-ground vaults 150 m Less than 200m

  10. Fiber Color Codes Blue Orange Green Brown Slate (Gray) White Red Black Yellow Violet Rose (Pink) Aqua (Lt Blue) After the 12th Fiber or Tube a black stripe is added to differentiate between groups.

  11. Various Indoor Fiber Packages

  12. Outdoor Loose Tube Armored Cable

  13. 96 Fiber Loose Tube Outdoor Non-Armored

  14. Types of Optical Fiber

  15. Fiber Termination Techniques • Hand Polishing • Fusion Splicing

  16. Relay Racks

  17. Fiber Patch Panel

  18. Break Out Kits (Furcation)

  19. Patch Panel Connectors & Patch Cords • Connectors • Many types of connectors are available • Choose connectors to differentiate fiber types • IMPORTANT! • ST connectors more suitable for MMF • SC or LC are preferred types for SMF • Patch Cords • MMF are generally Orange but other colors are used • SMF cords are exclusively yellow

  20. ST & SC Fiber Optic Connectors

  21. LC Connector

  22. Duplex LC Connector

  23. Single Mode Fiber - Back Lit

  24. Questions?

  25. Thank You! Let’s polish some fiber!

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