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All rights reserved © 2005, Alcatel, IBSI 2005 APPA Community Broadband Conference Operating an HFC Network? How is FTTH in Your Future Mark Klimek Alcatel 919-850-6554 Mark.Klimek@alcatel.com Bill Lee IBSI 215-354-1604 blee@ibsionline.com
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All rights reserved © 2005, Alcatel, IBSI Page 2 Overview HFC Network-Bandwidth Usage Future Services HFC to FTTH - Determining When to Convert HFC to FTTH - A Case Study Top 4 Reasons for FTTH
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All rights reserved © 2005, Alcatel, IBSI Page 3 HFC Network-Bandwidth Usage 80 Analog Channels (500 MHz) 120-160 Digital Channels (100 MHz) High Speed Data Channels (18 MHz) Video on Demand Channels (30 MHz) High Definition Channels 8 Off Air HD Channels (48 MHz) 8 Satellite HD Channels (48 MHz) Total Bandwidth Usage: 744 MHz
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All rights reserved © 2005, Alcatel, IBSI Page 4 Future Services Voice over IP Gaming (MMDS, Interactive, etc.) Network PVR Security Distance Learning HD VoD Other Services not yet conceived
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All rights reserved © 2005, Alcatel, IBSI Page 5 HFC to FTTH-Determining When to Convert? Existing Network System Size Customers/Subscribers Services Offered/Planned Construction (Make Ready) Upgrade Rebuild New Build New Deployment
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All rights reserved © 2005, Alcatel, IBSI Page 6 HFC to FTTH- A Case Study (HFC)
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All rights reserved © 2005, Alcatel, IBSI Page 7 HFC to FTTH-A Case Study (proposed FTTH migration)
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All rights reserved © 2005, Alcatel, IBSI Page 8 HFC to FTTH-Things to Consider Proper sizing of HFC network early on - Critical Case Study was from Node+0, Node+1 HFC (125 HP) 6 fibers to each node Nodes replaced by Fiber Enclosure (splitters) Split into 32 (64-GPON) home pockets Port utilization Majority Overlash is with 24ct fiber
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All rights reserved © 2005, Alcatel, IBSI Page 9 Top 4 Reasons for FTTH Future-Proof Network Same network for business & residential customers Protection from Competition Avoid Make Ready Work
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All rights reserved © 2005, Alcatel, IBSI Page 10 What is a Passive Optical Network (PON)? Physical point-to-multipoint fiber connection Passive splitters split feeder fiber Multiple drops connect end users Outside plant requires no power, low maintenance PON is an end-user technology optimized for the mass scale Glass splitter CO Customer Three models of PON available today: Broadband PON (BPON) Gigabit PON (GPON) Ethernet PON (EPON) (also called Gigabit Ethernet PON, GEPON)
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All rights reserved © 2005, Alcatel, IBSI Page 11 Standards Comparison Overview
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All rights reserved © 2005, Alcatel, IBSI Page 12 Service Support With GPON Voice Service POTS to Class 5 switch (requires voice gateway) POTS directly to softswitch (usually SIP or H.248) Via Ethernet with SIP-phone Data Service High-speed Internet (HSI) service –Prioritized and differentiated service capability DS-1 / DS-3 Service –Circuit based services including “Specials” –Use TDM over Packet (CESoIP) technology Video Service IPTV –MPEG2/4, Ethernet transport, IGMP signaling RF video –Analog + digital RF-based, same as CATV operation
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All rights reserved © 2005, Alcatel, IBSI Page 13 PON Components Packet Optical Line Terminal (P-OLT) Located in headend / central office ATM or Ethernet switch Sources PONs (typically 40-80 PONs per OLT) Optical Network Terminal (ONT Equipment at customer location Optimized for application and number of interfaces Video OLT (EDFA) Video amplifier, power sized for PON outside plant Used for RF video only; same model as CATV WDM Used to merge the data and RF video paths on fiber Splitter Optical devices that allow multiple users to share the single fiber
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All rights reserved © 2005, Alcatel, IBSI Page 14 Typical GPON Deployment Voice, data and video (bi-directional) for up to 64 subscribers over a single fiber Coarse WDM supports 2 or 3 wavelengths — 1490/1310/1550 nm 2.5G/ 1.2Gb/s line rate over two wavelengths – RF video is independent 20 km (12.4 mi.) span 20 km (12.4 mi.) 1,550 nm 2.5 Gb/s 1,490 nm 1,310 nm Splitters V-OLT (EDFA) P-OLT Management System Central Office or Headend Fiber Distribution Passive Outside Plant 1.2 Gb/s RF Video ONTs WD M HSI, DS-1 Voice IP Video RF-Video Source
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All rights reserved © 2005, Alcatel, IBSI Page 15 Outside Plant Parameters Will be evaluated for a PON deployment Should be taken into account in an HFC deployment if considering PON for future Topology Centralized vs. distributed splitting Splitter variables Optical loss Split ratio 1:16 / 1:32 / 1:64 Distance 1-20km Optical Budget Typically 28dBm FEC extends digital path reach RF budget varies with analog / digital channel mix, EDFA power level
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All rights reserved © 2005, Alcatel, IBSI Page 16 Alliance Feeder OSP Cable From CO / Headend Fiber Distribution Hub (FDH) Splice Case Distribution Cable Access Terminal TAP- Terminal Access Point Drop Cable ONT FTTU Outside Plant Similar to HFC OSP architecture
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All rights reserved © 2005, Alcatel, IBSI Page 17 Operational and Maintenance Costs Maintenance costs can differ significantly between fiber and copper technologies PON is passive from the CO/headend; no nodes to maintain and power Fiber splices have longer lifetimes than copper joins No corrosion issues with fiber Operational costs also differ GPON designed to deliver triple-play services The ONT is a very intelligent device at the user premise –Full enable/disable control of each service –Management, measurement and statistics for operations and marketing End-to-End management is standardized via the OMCI reducing provisioning time, allowing inter-operability, and simplifying testing Industry estimates of the OPEX cost savings of a fiber deployment over a copper deployment range from 20% - 50% annually When factored into a business case, this is a significant saving
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All rights reserved © 2005, Alcatel, IBSI Page 18 HFC to PON: How to Transition? Cap and grow: Transition from HFC to PON Complete build of areas covered by HFC nodes Begin deployment of PON in new areas Challenge: Can only offer HFC-level capabilities on higher performance PON Benefit: Do get benefits of reduced operational and maintenance expenses Overbuild / replacement Replace existing HFC plant with PON Allows ubiquitous service offering to all customers Gains of operational and maintenance expenses Challenge will be to depreciate / payoff HFC equipment Likely scenario is a combination of both models Retain existing HFC as long as possible Begin deployment of PON as soon as possible Overbuild high take rate or areas challenged by competition
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All rights reserved © 2005, Alcatel, IBSI Page 19 GPON Replacing HFC in Field Splitters Replace active HFC node V-OLT (EDFA) Could reuse if power level is appropriate P-OLT replaces CMTS Management System ONTs WD M (new ) HSI, DS-1 Voice IP Video RF-Video Source Splices, additional splitters or homerun fiber Distribution fiber could be reused. Need to size it correctly during HFC build Drop fiber to replace coax drops
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All rights reserved © 2005, Alcatel, IBSI Page 20 www.alcatel.com
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