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2005 APPA Community Broadband Conference Operating an HFC Network?  How is FTTH in Your Future

2005 APPA Community Broadband Conference Operating an HFC Network?  How is FTTH in Your Future. Bill Lee IBSI 215-354-1604 blee@ibsionline.com. Mark Klimek Alcatel 919-850-6554 Mark.Klimek@alcatel.com. Overview. HFC Network-Bandwidth Usage Future Services

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2005 APPA Community Broadband Conference Operating an HFC Network?  How is FTTH in Your Future

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  1. 2005 APPA Community Broadband ConferenceOperating an HFC Network?  How is FTTH in Your Future Bill Lee IBSI • 215-354-1604 • blee@ibsionline.com Mark Klimek Alcatel 919-850-6554 Mark.Klimek@alcatel.com

  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

  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

  4. Future Services • Voice over IP • Gaming (MMDS, Interactive, etc.) • Network PVR • Security • Distance Learning • HD VoD • Other Services not yet conceived

  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

  6. HFC to FTTH- A Case Study (HFC)

  7. HFC to FTTH-A Case Study (proposed FTTH migration)

  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

  9. Top 4 Reasons for FTTH • Future-Proof Network • Same network for business & residential customers • Protection from Competition • Avoid Make Ready Work

  10. Glass splitter CO Customer 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 • Three models of PON available today: • Broadband PON (BPON) • Gigabit PON (GPON) • Ethernet PON (EPON) (also called Gigabit Ethernet PON, GEPON)

  11. Standards Comparison Overview

  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

  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

  14. 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 Typical GPON Deployment Central Office or Headend FiberDistribution PassiveOutside Plant 20 km (12.4 mi.) Management System Splitters P-OLT 1,490 nm 2.5 Gb/s WDM HSI, DS-1 1,310 nm 1.2 Gb/s Voice IP Video RF Video RF-Video Source ONTs 1,550 nm V-OLT (EDFA)

  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

  16. FTTU Outside Plant • Similar to HFC OSP architecture Feeder OSP Cable From CO / Headend Fiber Distribution Hub (FDH) Splice Case ONT Drop Cable Distribution Cable AccessTerminal Distribution Cable TAP- Terminal Access Point ONT Alliance Splice Case Drop Cable

  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

  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

  19. GPON Replacing HFC in Field Splices, additional splitters or homerun fiber Management System Distribution fiber could be reused. Need to size it correctly during HFC build P-OLT replaces CMTS WDM (new) HSI, DS-1 Splitters Replace active HFC node Voice IP Video RF-Video Source ONTs V-OLT (EDFA) Could reuse if power level is appropriate Drop fiber to replace coax drops

  20. www.alcatel.com

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