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FTTH Conference 2011 Workshop Cost Effective Roll Out Thomas Lecker


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FTTH Conference 2011 Workshop Cost Effective Roll Out Thomas Lecker

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FTTH Conference 2011 Workshop Cost Effective Roll Out Thomas Lecker

  1. 1. Techniques for Reusing existing duct infrastructure
  2. 2. Some observations... Process of increasing bandwidth needs goes on (e.g. 3D HD television) DSL techniques reach their limit Threat of a ‘Digital divide’ already reality Green Theme gets more & more attention also in the Teleco Industry Hesitation to invest in FTTH: how to guarantee an acceptable ROI for investors?An all Fiber network is the future proof answer but how?
  3. 3. Further observations Telco regulators (Arcep, CMT, Ofcom, ...) driven by EU policies force incumbent operators to open their duct infrastructure Where a balanced frame work for duct sharing is implemented creating own duct infrastructure in a brownfield environment is stopped (e.g. France) Reduced Capex leads to an explosion in FTTH initiatives (e.g. France)
  4. 4. CAPEX of Greenfield FTTH Deployments Source: FTTH Handbook 2010 v.3.1
  5. 5. How to share ducts ? Having an existing duct infrastructure = Gold in the ground! Remaining duct capacity must be used in an optimal way, get rid of wasting space! Cable over cable installs
  6. 6. Cable over cable installs The cable of a new operator is pulled over the existing cable(s) in a duct+ cheapest solution if it works- high friction is generated during a pull due to high COF (coefficient of friction) between cable jackets- Can lead to burn through of a cable jacket- Can lead to exceeding the maximum allowed pulling forces on a cable and potential fiber damage- Difficult and risky to replace a cable- Does not result in a maximum fill ratio of the duct
  7. 7. Subducting with rigid sub ducts The main duct is subducted with several Rigid sub ducts Can be traditional ‘big’ sub ducts to sub duct a ‘big’ main duct (e.g. 100 mm duct with 4x 32 mm sub ducts Can be more recent smaller ducts (e.g. 50 mm HDPE) with mini ‘sub’ ducts+ cable can installed by different techniques (pulling, blowing)+ installed cable can be replaced easily- works only well in empty ducts of an existing duct infrastructure- in overlay applications high friction is generated during the pull of the (mini) sub ducts due to the high COF between the sub duct(s) and the existing cable(s)- does not allow to maximize the capacity of the duct
  8. 8. Sub ducting with Flexible sub ducts The main duct is subducted with several Flexible subducts For all sizes of main ducts+will maximize the capacity of an existing duct infrastructure+best solution for overlay applications+installed cable can be replaced easily-less suitable for long distance applications (> 2000 m)
  9. 9. Examples form the field FTTF
  10. 10. Examples from the field FTTF (Continued)
  11. 11. Examples from the Field Elbe Tunnel (Hamburg )
  12. 12. Examples from the field
  13. 13. Examples form the field City of Luxembourg
  14. 14. Thank You