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Fiber Optic Hardware. Ch 7 Fiber Optics Technician’s Manual, 3 rd . Ed Jim Hayes. Hardware. Hardware protects and organizes cable, splices, and termination points Premises Hardware – indoor Outside plant Hardware – outdoor. Premises Cabling. TIA Standards 2000 feet max. backbone wiring

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fiber optic hardware

Fiber Optic Hardware

Ch 7

Fiber Optics Technician’s Manual, 3rd. Ed

Jim Hayes

  • Hardware protects and organizes cable, splices, and termination points
  • Premises Hardware – indoor
  • Outside plant Hardware – outdoor
premises cabling
Premises Cabling
  • TIA Standards
    • 2000 feet max. backbone wiring
    • Based on telco wiring standards
      • Image adapted from (link Ch 7a)
backbone cabling another diagram
Backbone Cabling(another diagram)
  • Three connector pairs to get from outside to the desktop
    • Main Cross-Connect
    • Intermediate Cross-Connect
    • Telco Closet
main cross connect mc
Main Cross-Connect (MC)
  • Should be near the data center (for LANs) or the PBX (for telephones)
    • PBX: Private Branch Exchange; i.e., the campus switchboard
mc equipment should
MC equipment should:
  • Handle enough fibers for all transmission needs
  • Accept:
    • Direct termination
    • Pigtail splices
    • Preterminated assemblies (see next slide)
  • Provide jumper storage and reconfiguration
  • Allow for growth
preterminated assemblies plug play
Preterminated Assemblies (Plug & Play)
  • Preterminated cable
    • With SC or other connectors in a special sock for pulling, or
    • MTP ribbon cable connectors (12 fibers in a single SC-size plug) that plugs into a preconnectorized patch panel
      • Pictures from Corning (link Ch 7b & 7c)
intermediate cross connect
Intermediate Cross-Connect
  • Connects interbuilding cable plant to intrabuilding cable plant
  • May be wall-mounted
    • Image from
    • link Ch 7e
telecom closet
Telecom Closet
  • Transition from backbone to horizontal cable plant
    • Images from and (links Ch 7f & 7j)
homerun cabling
Homerun Cabling
  • This simpler, centralized network design is cheaper and popular
  • It works because fiber carries data over a long distance with passive links
homerun cabling another diagram
Homerun Cabling(another diagram)
  • Home-run Cabling
    • All the cables originate from a single distribution enclosure
    • Also known as star topology
      • Links Ch 7n, 7o
hardware for distribution points
Hardware for Distribution Points
  • Splice panel
  • Patch panel
  • Wall outlet
  • Conduit and innerduct
splice panel
Splice Panel
  • Holds and protects splices in one or more splice trays
    • Images from,, and Corning (links Ch 7f, 7g, 7h)
patch panel
Patch Panel
  • Provides a centralized location for connecting fibers, testing, monitoring, and restoring riser or trunk cables
  • Requires short patch cords
    • Images from and Corning (links Ch 7f, 7i)
wall outlets
Wall Outlets
  • Terminates permanent wiring
  • Provides a connection for a jumper cable to equipment
    • Image from (links Ch 7j)
outside plant hardware
Outside Plant Hardware
  • Splice Closures
  • Conduit or innerduct
    • No connectors are usually used outdoors – only splices
splice closures
Splice Closures
  • Protect splices from water and the elements
  • Inline
  • Image from (link Ch 7k)
dome type splice closure
Dome-type Splice Closure
  • Image from (link Ch 7k)
conduit and innerduct
Conduit and Innerduct
  • Cable is installed in conduit
  • Large conduits may have several innerducts inside them
    • Images from and links Ch 7l and 4q)
cable installed into pavement
Cable Installed into Pavement
  • MCS Road Cable is designed to be inserted directly into a slit cut into pavement
  • This makes installation convenient – you don’t have to block traffic much
    • Image from Corning & CENIC, from link Ch 7m
outside plant
Outside Plant
  • All singlemode fiber
  • High fiber counts, up to 288 or more
  • Cable reels are fusion spliced together for long distances
  • Preconnectorized pigtails are spliced onto the ends of the cables
  • Every fiber is tested with an OTDR (Optical Time Domain Reflectometer)
  • Very expensive equipment needed
premises cabling23
Premises Cabling
  • Short lengths, fewer fibers per cable
  • Multimode fiber
  • Splicing is rare
  • Connectors and patch cords are used for flexibility
  • Installer often also installs power and copper LAN cables
  • Equipment is much cheaper
the installers
The Installers
  • Outside Plant installers work for telephone companies or other large corporations
  • Inside Plant installers are often independent contractors
  • Go to an FOA-approved school
  • Get the FOA certification
    • CFOT or Certified Fiber Optic Technician (basic)
    • CFOS or Certified Fiber Optic Specialist (advanced)
    • CFxT (Certified FTTx Technician) (new, see link Ch 8c)
tools and test equipment
Tools and Test Equipment
  • You will need the basic tools, as found in our tool kits, including a microscope
  • And a power meter
  • If you do outside plant work, you will need a fusion splicer and OTDR
keeping up to date
Keeping Up To Date
  • Like all other high-tech, fiber optics changes rapidly
  • You will have to constantly learn new things
  • LAN administrators typically spend 10 hours per week studying new technology
entering the market
Entering the Market
  • Start slowly
  • Get a small job and do it carefully
  • Promote your services and grow
promoting and selling fiber optic services
Promoting and Selling Fiber Optic Services
  • Make a brochure and Web site
  • Take photographs of your work
  • Give references of previous customers
  • Ask your suppliers to recommend you to customers
overseeing fiber installations
Overseeing Fiber Installations
  • Supervisors must know how to install fiber correctly
  • Make sure cables are pulled and terminated correctly
  • Workmanship should meet standards
    • NECA/FOA 301-2004, Standard for Installing and Testing Fiber Optic Cables (ANSI) (see link Ch 6d)
  • Test every fiber in every cable for loss
  • Document every fiber
plan for inspection
Plan for Inspection
  • Before bidding on a job, make sure you know who the inspector will be and what will be required
  • Usually the person who hired you will be inspecting, or someone at their company
  • Local interpretations of fire codes and other regulations vary!
pricing fiber installations
Pricing Fiber Installations
  • Request for Proposal
    • Gives you general description of a project
    • You must design, schedule, and price the job
  • Calculate real cost, add overhead and some extra for contingencies