GLITS Agenda: Fiber to the Home

1
GLITSAgenda Fiber to the Home

• Broadband Technology Overview, Steve Belter,
  Indiana Dataline Corp
• Active Ethernet FTTH,Oliver Beers, Wintek
  Corporation
• GPON FTTH,Steve Biggerstaff, Cinergy MetroNet

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Broadband Technology Overview

• Steve Belter, President
• Indiana Dataline Corp
• 427 N 6th Street, Suite C
• Lafayette, IN 47901
• www.indiana-dataline.net
• seb_at_wintek.com

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Broadband Technologies

• ISDN DSL (too slow)
• Fixed Wireless WiFi, WiMax (too slow)
• Mobile Wireless 3G, 4G LTE (too slow)
• Satellite (really too slow)
• Cable Modems using DOCSIS
• FTTx Active Ethernet and WDM-PON
• FTTx GPON and TDM-PON

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Acronyms Fiber to where?

• FTTH Fiber to the Home
• FTTP Fiber to the Premise
• FTTB Fiber to the Building (multitenant office
  and residential)
• FTTC Fiber to the Curb
• FTTN Fiber to the Node
• FTTx wherever

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Broadband Quality Measures

• Speed (kilobits/sec, megabits, gigabits)
• Latency (think delay or ping time)
• Jitter (think ping time variation)
• Symmetric or asymmetric down/up speeds

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Terminology

• Wavelength/frequency color of the light
• Passive vs. active does an intermediate
  distribution point need power?
• PON Passive Optical Network
• WDM Wavelength Division Multiplexing(using
  different colors at the same time)
• TDM Time Division Multiplexing(one at a time,
  maybe round-robin)

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Cable Modems Architecture

• HFC Hybrid Fiber Coax
• Fiber to the Node powered cabinet in the
  neighborhood (grey steel box)
• Coax from the node to each home
• Each node typically serves 50-1000 homes(target
  used to be 500 homes)

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Cable Modems - DOCSIS

• DOCSIS Date Over Cable Service Interface
  Specification
• Comcast currently deploying DOCSIS 3.0
• Each 6 MHz channel can carry 30 Mbps
• Bonds 4 or more channels downstream, shared with
  all of your (node) neighbors
• Uses TDM for upstream

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Cable Modems Summary

• Node bandwidth shared with your neighbors
  (50-1000 neighbors)
• Asymmetric speeds (upload slower)
• TDM upstream increases jitter

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FTTx Direct Connection

• One strand of fiber from the ISP to you
• Two colors used, one for upstream, the other for
  downstream (WDM)
• Usually symmetric speeds up/down
• Private, not shared, connection to ISP
• Best speeds, latency, and jitter
• Requires lots of fiber

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Active Ethernet Architecture

• Fiber to the Node powered cabinet in the
  neighborhood with Ethernet switch
• Fiber from the node to your home
• Usually symmetric speeds up/down
• Typically gigabit from the ISP to the switch in
  the node, 1-48 neighbors with 100 Mbps each
• Active node, but needs less fiber

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Active Ethernet Summary

• Active electronics in the neighborhood node
• Bandwidth shared with a few neighbors, but may or
  may not be oversubscribed
• Excellent speeds, latency, and jitter
• Uses less fiber

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Passive Optical Networks

• At the node, downstream colors are sent to 8, 16,
  32, or 64 homes using a power divider
• At the node, upstream color is combined from the
  same 8, 16, 32, or 64 homes using TDM
• The dividers and combiners are passive, not
  requiring any electronics or power
• Unaffected by power outages

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GPON Architecture(Gigabit PON)

• Fiber to the Node passive optical splitters and
  combiners in the node
• Fiber from the node to your home
• Typically two colors downstream, one for IP
  (data/TV/voice), other for analog TV
• One upstream color for TDM data/voice
• One of several types of TDM-PON

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GPON Summary

• Nodes dont need electrical power
• Typical downstream is 2.4 Gbps shared with 32
  neighbors for both data and TV
• Typical upstream is 1.2 Gbps shared with 32
  neighbors using TDM
• Asymmetric speeds up/down
• Good speeds, latency, and jitter
• Uses less fiber than direct fiber

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Future Fiber TechnologyWDM-PON

• Instead of using TDM to share fibers, use WDM
  (different colors)
• Passive nodes for reliability
• Like direct fiber, private non-shared symmetric
  connections, typically 1 Gbps
• Same advantages as direct fiber
• Uses less fiber than direct fiber

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Summary

• Comcast using DOCSIS 3.0
• Wintek uses direct connections or Active Ethernet
• Cinergy MetroNet uses GPON, one of the flavors of
  TDM-PON

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Questions?

• Thank you for your attention
• Steve BelterIndiana Dataline Corp269-8521
  (direct number)seb_at_wintek.comwww.indiana-datali
  ne.net