Passive FTTH Solutions SCTE – Ontario Chapter Mtg

Mark ConnerMarket Development ManagerCorning Cable Systems5 February 2008

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Contents• A Few Statistics• PON Architectures• PON Overview• Deployment Approaches and Solution Sets for FTTH• MDUs – Unique Challenges, Opportunities and Solutions• Design Goals for MSO FTTH Networks• Migration

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FTTH Homes Passed in N.A. thru September 2007

Passed9,552,300

Marketed7,996,400

Connected2,142,000

ConnectedIncl. Video1,054,000

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Innovations in FTTH products and practices continue to reduce deployment costs

Skilled splice technicianrequired to installeach fiber drop

Field-spliced

I&R techniciancan quicklyinstall each fiber drop

Pre-Conn Drop

I&R technician can quickly install each fiber drop ANDnow even the fiber terminal

2004

DeploymentPassivesActives

2005

Large Volume Active System Price Decline

Passive Component Price Decline

PassiveComponentInnovations

Deployment CostSavings fromHardened connectorsfor Drop Segment

Active System Price Decline

Passive Component Price Decline

Deployment CostSavings fromPre-connTerminalDistributionSystems

PassiveComponentInnovations

2006

Pre-Conn Cables

Hardware DeferralPassives DeferralMDU Innovations

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Variety of Types•GPON/BPON

•1490/1310 nm Dn/Up•1550 nm RF Overlay

•RF over Glass•1550/1310 nm Dn/Up•Other options possible

•Other split ratios possible•Standards Important – Example: FSAN

Generic Passive Optical Network Architecture

OLT

OLT

OLT

OLT

OLT

HUB(OLT)

1x32Splitter

λ1 - Dn

λ2 - Up

1F/SubscriberSubscriber$

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FTTH Network Architectural Elements& Deployment Phases

• Basic Elements– Hub/Head End– Feeder– LCP– Distribution– NAP– Drop– Subscriber

(CPE, NID)

• Deployment Phases

– Homes Passed– Homes

Connected

Choice Factors•Anticipated Take Rate•Splitter Placement Strategy

•Density and Geography•CapEx Deferral to Match Revenue•Engineering Complexity

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Central Switch Homerun (CSH)Choice of Many Smaller DeploymentsCentral Switch Homerun (CSH)Choice of Many Smaller Deployments

All splitting takes place in the Hub/Head End

PRO•Highest bandwidth•Easy to design and manage•Best scaling of actives & splitters•Easy delivery of individual services

CON•Very Fiber intensive – Higher cost•Demanding hub real estate

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Local Convergence (LC) - Centralized SplittingChoice for Large Scale Deployments w/Green & BrownfieldLocal Convergence (LC) - Centralized SplittingChoice for Large Scale Deployments w/Green & Brownfield

All splitting takes place in the LCP

PRO•Very high bandwidth•Easy to design and manage•Excellent scaling of actives & splitters•Wide range of take rates and densities•Low feeder fiber count

CON•Must visit LCP during subscriber connection truck roll

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Distributed Splitting (DS)Choice for Rural or Fiber-Constrained DeploymentsDistributed Splitting (DS)Choice for Rural or Fiber-Constrained Deployments

Splitting takes place in Two or more Tiers

PRO•Minor savings from lower fiber count•Has application for rural areas

CON•Bandwidth may be limited•More complex to design and manage•Higher overall splitter cost•Inefficient scaling - $$ before revenue•Upgrade-ability may be limited•Difficult to offer dedicated services

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Solution Sets for MSO FTTH• Field Spliced Solutions• Combination Field Spliced / Pre-connectorized Solutions

– Factory Pre-connectorized Drop Cables– Field Spliced Terminals w/Drop Ports

• Terminal Distribution System (TDS) Solution– Distribution Cables w/Factory-Installed Access Points– Plug and Play Terminals– Factory Pre-Connectorized Drop Cables– Highest Value & Fastest Deployment– Highest Level of Factory Test

• Minimize Total Installed Cost• Reduce burden on installation craft• Strategic Advantage

– Faster Deployment– Faster Subscriber Connection

Field Spliced - 1+ hr/drop

Combo Splice/Pre-Conn- Initial 2-3 hr/Terminal- + 5 min/drop

TDS- 15 min Terminal- + 5 min/drop

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Field Spliced Method of FTTH Deployment

Same products can be used for all three methods Field-spliced products, piece-parts approach

HeadEnd

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Outdoor LCPs – Key Design Criteria

Key Design Criteria:

• Front Access

• Splitter Module Segmentation

• Dedicated Parking

• Shuttered Adapters

• Clear Dust Caps for VFL Tracing

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Outdoor LCPs – Key Design Criteria

• Pad or Pole mountable

• Stackable 6” skirts for Canadian

winters

• Factory stubbed feeder and

distribution cables

• Single splitter leg length

144F 288F 432F

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Pros & ConsField-spliced FTTH Deployment

– Material generally costs less– Material + labor costs more– Overhead equipment cost– Much greater install time

increasing cost and decreasing productivity• Splicing setup required at

NAP and NID – Network reliability depends

on the installation crew and the conditions (weather, and adherence to best practices)

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Combination Field Spliced / Pre-ConnectorizedMethod of FTTH Deployment

Same products can be used for all three methods Pre-connectorized drop terminal

HeadEnd

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Optical Network Terminal Housings CPE for Pre-Connectorized Drop Cable

Slack Storage Device

Active FTTH NID

Field Installable Connector

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Pros & ConsCombo Field Spliced/Pre-Conn FTTH deployment

• Material costs a little more– Material + labor costs less– Much faster installation

time• Splicing setup avoided

during customer adds– External connection

reliability– Hardened connectors

have helped make FTTH possible

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Terminal Distribution System (TDS)Method of FTTH Deployment

Same products can be used for all three methods Pre-Con Dist. - LCP to NAP w/Pre-Conn Drop

HeadEnd

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Pros & ConsTDS Method of FTTH Deployment

– Material costs little more– Material + labor costs less

• no splicing at NAP– Much faster installation

time, splice avoided– Deferred terminal cost – External connection

reliability– The TDS method lowers

the cost of FTTH deployment while accelerating deployment

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Loss Budget Comparison – Typical Values

All-Splice Combo TDSHub OLT-OSP Panel SC/APC 0.15 0.15 0.15

OSP Panel-OSP Cable Fusion 0.05 0.05 0.05Feeder At least one splice Fusion 0.05 0.05 0.05

LCP Splice input Fusion 0.05 0.05 0.05Splitter Input SC/APC 0.15 0.15

Splitter Output SC/APC 0.15 0.15Splice Output to Dist. Fusion 0.05 0.05 0.05

Splitter 1x32 15.70 16.60 16.60Distribution Splice at Terminal Fusion 0.05 0.05 0.05

Quick Terminal Connect MTP 0.35Drop Connect at Terminal SC/APC 0.15 0.15

Fiber km @ 0.35/0.25 dB/KM 15 5.25 5.25 5.25Total (dB) 21.35 22.70 23.05

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Multi-Dwelling Units – A Unique Opportunity

• Very high density• Many homes passed with

minimal infrastructure• Cabling challenges have lead

to a MDU-tailored solution set– Cable path creation– Multiple tight bends in path– Fastening methods– Rapid deployment

• Viable for Greenfield and Brownfield

• Spliced, Combination and TDS approaches available

Splice/Connector Box

Terminal

Every 1-3 Floors

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New Challenges: Drop Cable Routing

Surface mounting – tight bends and stapling as for copper cables

Potential: 2-3 dBGoal: 0 dB!

Protective Molding with Indoor Optical Drop Cables (15 bends)

Pulling drop cable directly through joists and studs w/o duct

Brownfield Greenfield

Stapling

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Design Goals for MSO FTTH Networks• Compatibility with Existing Systems

– For MSOs, CMTS

• Transparency to Evolving Technologies• Minimize CapEx• Minimize OpEx (powering, testing, maintenance)• Minimize Complexity of Deployment• Maximize Bandwidth Capability• Maximize Competitive/Strategic Benefit• Standards-Based Layer One (FSAN, ITU-G.984)• Say “YES” to Developers: “Can you do FTTH?”• Overall – Future-proof the Network

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Planning Migration to FTTHBeyond GreenfieldExisting Network

– Evaluate # Fibers per Node– Capacity w/1x32 or 1x64 approach– Consider All-passive or Remote Active Approach– Determine Cut-over Process

• All at once• Phased

• New HFC Today FTTH Tomorrow– Minimum fiber count to support 1x32– Example: 250-home node pocket

• 8F Minimum• 12F Preferred (one full tube or ribbon)

– Slack for future moves and splicing