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FTTH Conference 2011 Workshop MDU Cabling Choices Thomas Knuth CORNING

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FTTH Conference 2011 Workshop MDU Cabling Choices Thomas Knuth CORNING

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FTTH Conference 2011 Workshop MDU Cabling Choices Thomas Knuth CORNING

  1. 1. MDU Cabling Choices:An Ongoing ChallengeDr. Thomas KnuthProgram Manager, MDU, GlobalCorning Cable Systems
  2. 2. Content• MDU Application Space Still a fragmented scenario• Architectural Approaches for Various MDU Building Types  Small – Medium – Large Buildings• Common Themes Across All Deployment Scenarios• Key Lessons Learned © Corning Incorporated 2011 2
  3. 3. The Multidwelling Unit (MDU):A Challenging Space to Deploy• There are various factors influencing MDU deployment scenarios• Is there an ideal solution to cover all aspects? Total Cost• Experience shows Available Regulation Labor Deployment NO ! Speed• But: Try to find the most Fiber Count balanced solution for your Building sizes individual roll-out scenario Architecture Local Preferences Network Quality © Corning Incorporated 2011 3
  4. 4. Use Building Size As Basic Design Criteria First Phases of urban mass housing construction • Apartment buildings to 6 floors • Total height rarely exceeded 30 m • Buildings were arranged around traffic knots • Built as closed quarters Modern Phase ‘Satellite’ cities were created • Standardized building elements • In groups of large individual buildings • Many more floors per building Today, urban housing returned to more ‘pleasant’ type • New buildings must match the overall appearance of area • Returned to the sizes used in the beginning of the 20th century © Corning Incorporated 2011 4
  5. 5. What Do The Statistics Tell Us? Medium size Large size Small size 60%-85% 10%-30% 5%-10%Three distinct architectural types, which could serve as basic segmentation © Corning Incorporated 2011 5
  6. 6. Most Relevant MDU Architectures To Cover Basic Segmentation © Corning Incorporated 2011 6
  7. 7. Small MDUsSmall buildings usually served by a direct-drop architecture from centraldistribution point (basement or outside) Various connectivity options on customer side Pigtail runs directly to customer © Corning Incorporated 2011 7
  8. 8. Summary Of Value Proposition – Small MDUs Key deployment factors:Space Logistical Need for very Applicable Speed ofrequirement efforts skilled labor for single deployment fiber or multi-fiberUse of small Use of Pre- Scalable More cablebend- standard connectorised with fiber to pull butinsensitive length solution & field- count per littlecable installable drop cable hardware to connector install Medium Medium No Yes Medium © Corning Incorporated 2011 8
  9. 9. Medium-sized MDUs The medium-sized building segment is the major part of European MDU architectures: • Driver for business cases • Focus of deployment efforts  Need for cost-effective and fast-to-deploy solution Various architecture approaches exist side by side: • Fully pre-connectorised cables • Partly pre-connectorised cables • Fully spliced cable solution © Corning Incorporated 2011 9
  10. 10. Medium-sized MDUs Medium-sized buildings are often served by a central riser and various floor terminal Single-fiber connectivity and field-installed connectors Single- or multi- fiber connectivity in basement and riser © Corning Incorporated 2011 10
  11. 11. Fast Solution For Riser:Cable Assembly – Installation in MDU Pulling the cable from the bottom to the top until the branching off points are on the floor level 5. floor Removing protection sleeves for floor break out cable assembly by rip cord 4. floor Connecting the pre-connectorised cable assembly to the floor terminal 3. floor Connecting the pre-connectorised 2. floor bottom end of the riser cable with the basement distribution terminal 1. floor Splicing the distribution cable in the basement distribution terminal Basement © Corning Incorporated 2011 11
  12. 12. Pre-Connectorised vs. Conventional Solutions © Corning Incorporated 2011 12
  13. 13. Summary Of Value Proposition Key deployment factors:Space Logistical Need for very Applicable Speed ofrequirement efforts skilled labor for single deployment fiber or multi-fiberSmall due to Basic Pre- Scalable Fast to pull,multi-fiber building connectorised with multi- quickest tocable survey solution fiber connect connector Low Medium No Yes Very High © Corning Incorporated 2011 13
  14. 14. High-rise MDUs High buildings are well served by using multi- fiber connectivity Multi  Single connector for customer area Multi-fiber connectivity in basement, riser and floor © Corning Incorporated 2011 14
  15. 15. High-riseInstallationTechnique Legend Drop cable Riser cable Floor Terminal Indoor Basement Collapsible Distribution terminal reel Hub © Corning Incorporated 2011 15
  16. 16. High-rise MDUs Key deployment factors: Space Logistical Need for very Applicable Speed of requirement efforts skilled labor for single deployment fiber or multi-fiber Small riser Use of Pre- Scalable Easy to pull, cable standard connectorised due to multi- quick to length solution fiber connect connector Low Low No Yes High © Corning Incorporated 2011 16
  17. 17. Architecture Summary – Key Lessons LearnedBased on Corning’s wealth of experience in deploying various architecturetypes globally, we believe:There is something in common with most of these: Plug & play approach to save precious labor time & cost Installed fiber cable type matters (uncontrolled environment) Power budget considerations drive architectures – look at it carefully Combined hardware, cable and fiber expertise allows creation of real solutions Quality and reliability are not to be compromised Make sure you understand your available labor force © Corning Incorporated 2011 17
  18. 18. How To Understand the Plug & Play Approach Best• Look at all deployment aspects  First-installed cost, labor cost, deployment speed for homes passed, take rate, available labor force etc.• Good approach is to model and compare potential scenarios: Model of cost break down of architectural choices Model of deployment time break down of architectural choices 700 800 Labor cost Installation time HC 600 Material cost 700 Installation time HP 600 500 500Example Example 400 400 300 300 200 200 100 100 0 0 Pre-connectorised Fully spliced riser Direct drop solution Pre-connectorised Fully spliced riser Direct drop solution solution solution solution solution © Corning Incorporated 2011 18
  19. 19. Installed Fiber Cable Type Matters Most The ProblemFTTH requires fiber cable to be deployed As fiber cable gets inside the private space in very challenging environments: • Meets more aggressive environment and handling • Space constraints • Higher installation speed requirements • De-skilled installation practices to lower labour cost (e.g. no ducting) • More likely to experience unwanted/accidental public access • Required to be more aesthetically pleasing As a result, the fiber cable … • Has an increased chance of inappropriate installation procedures • Can experience tighter bends, crush etc. • Needs to be treated “like copper” © Corning Incorporated 2011 19
  20. 20. Uncontrolled Environment:Requires Highest Bending Performance Choosing the right G657 fiber for your cable FTTH requires fiber cable to be deployed in very challenging environments Category A Category B G.652 Compliant G.652 Compliance not required 5mm G.657.A3* G.657.B3 7.5 mm G.657.A2 G.657.B2 10 mm G.657.A1 G.657.B1 A3*: proposed new ITU-T G.657 category © Corning Incorporated 2011 20
  21. 21. Power Budget Drives Architectures:Choose CarefullyMaximum Value Analysis - Quick & Simple - Data readily available - Leads to over-engineered networks & wastage of power budgetGaussian Statistical Analysis - Relatively quick - Data can be gained from median and STD values - Fixed link length - Gives more accurate prediction of probability of power budget compliance - Can reveal more power budget marginMonte Carlo Statistical analysis - Takes more time to do analysis - Uses accurate link length distribution - Provides the most accurate prediction of power budget compliance - Allows for most efficient use of available power budget © Corning Incorporated 2011 21
  22. 22. Power Budget Drives Architectures:Choose Carefully Proposal • Use Monte Carlo approach to model your network • Factor in fiber cable bend performance • Watch out for aging behavior of components (e.g., splitter)Reward:• A networks model which comes closest to real life• Architectural choices can be validated based on facts © Corning Incorporated 2011 22
  23. 23. Key TakeawaysSummary• MDU cabling options are still a challenge• There is no ‘one fits all,’ but grouping of building types can be done• Build the MDU architecture for major groups in your local area• Balance design choice based on your individual goals• Various key tools are available to help make right decisions• Use experience from already-installed FTTH networks, but continue to expect surprises © Corning Incorporated 2011 23

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