Notes for fiber network project staffs (Index)

  “Regarding to the daily fiber ftth project issues, FOT ftth blog is trying to collect a series of OSP notes, to guide your team’s design, installation and testing of fiber optic networks.”

FTTH Project OSP

FTTH Project OSP

An introduction to Optical Fiber and Why Fiber?

  Optical fiber technology provides a higher capacity data transfer at extremely high speeds, enabling the facilitation of multimedia content on networks, , such as High Definition TV (HDTV), Video on Demand (VoD) and high-speed data…

Construction-Optical Fibre Cable

Construction-Optical Fibre Cable

Fiber Advantages Summary:

  • It has exceptional bandwidth and is virtually “future proof”
  • It has the ability to carry many signals concurrently
  • It is immune to electromagnetic interference and has no electromagnetic emissions
  • It does not corrode like copper based cabling does
  • It is resistant to eavesdropping
  • It has the capability to operate in conjunction with any current, or proposed, LAN/WAN standard
  • It is light weight and easy to handle and it’s pulling strength is higher than that of copper cables

Detail Fiber Construction Parameters

Fiber Geomtric parameters

Fiber Geomtric parameters

  Fibre can either be single-mode (SM) or multimode (MM). Fibre sizes are expressed by using two numbers e.g. 9/125. The first number refers to the core size in microns and the second number refers to the core and cladding size combined in microns. It is impossible to differentiate between SM and MM fiber with the naked eye. There is no difference in the outward appearances; both are 125 microns in size – only the core size differs.

Fiber project OSP civil works preparation

  Any fiber installation project is a major undertaking. Notes for pre-build survey equipment and tools:

OSP Civil works preparation

OSP Civil works preparation

  1. Digital camera and spare batteries.
  2. GPS with tracking function and spare batteries.
  3. DCP tester.
  4. Tape measure.
  5. Measuring wheel.
  6. Clip board, note book and stationary.
  7. Route drawing/s from the client.
  8. Reflector jacket.
  9. Personal Identification.

FTTH project OSP notes: Trenchless Methods

  In very simple terms, HDD (Horizontal Directional Drilling) is a drilling process where a drill head is steered underground. This method is adopted by all companies but habitually, subcontracted to specialists. In what follows, a brief overview on the 3 installation stages:

The working principle of the HDD

The working principle of the HDD

  1. Pilot drilling
  2. Reaming the initial pilot hole
  3. Pulling back the duct in the reamed hole

Fiber Cable Pre-installation Procedures

  All optical fiber cables must be tested while on the drum, prior to deployment. The following items are key considerations, during the fiber cable pre-installation procedures:

fiber cable iinstallation process

fiber cable iinstallation process

  • Step 1, Pre-test with an Optical Time-Domain Reflectometer (OTDR).
  • Step 2, Pre-installation Cable Inspection.
  • Step 3, Cable pay-off – over the top or from the bottom?

FTTH project OSP notes: Duct Integrity Testing (DIT)

  If you have no ideas about what is this fiber cables DIT (Duct Intergrity Testing), please check bottom’s project video for reference. After backfilling ducts shall be tested for fiber cable’s integrity. Four types of tests are conducted:

Which test are they doing?

Which test are they doing?

  • Air Tightness Test
  • Foam Sponge Test
  • Mandrill Test
  • Pressure Test

  As prefix blog posts mentioned, our FOT FTTH team are also acting and also going to counsel and guide you when you are expanding and building your fiber optics network. 

Ask for fiber duct & test equipment details!

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