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A symmetrical D igital S ubscriber L ine Tutorial Slide Show

A symmetrical D igital S ubscriber L ine Tutorial Slide Show. Market Status of ADSL Technology. ADSL is the #1 Broadband Choi ce in the World with over 60% marketshare ADSL is now available in every region of the world

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A symmetrical D igital S ubscriber L ine Tutorial Slide Show

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  1. AsymmetricalDigital Subscriber Line Tutorial Slide Show

  2. Market Status of ADSL Technology • ADSL is the #1 Broadband Choice in the World with over 60% marketshare • ADSL is now available in every region of the world • ADSL is capable of providing up to 50 Mbp, and supports voice, video and data. • The new DSL network is IP-centric • There is broad equipment interoperability and there are currently established test specifications for ADSL, ADSL2plus, SHDSL, and VDSL • Finally, ADSL and home networking are a natural fit as DSL effectively supports multiple applications for multiple uses via each DSL connection.

  3. Tutorial Outline • What Is ADSL ? • What Can ADSL Do ? • How Does It Work ? • Architectural Options • Status of the Technology • The Future

  4. Simple overview of ADSL in the phone network POTS- Plain Old Telephone Service

  5. ADSL Equipment Standard Telephone Lines Central Office Building ResidentialCustomer ADSL Rackof Line Cards Customer Premises Equipment ADSL Modem or Gateway

  6. Reach of ADSL • Typically ADSL can reach as far as 18 kft from the central office • To extend the reach, service providers have a host of options, outlined in the white paper DSL Anywhere v.2

  7. “Evolution of Digital Access” Pure Fibre Hybrid Fibre/Copper FTTH Enhanced Copper FTTx, VDSL2, ADSL2plus ADSL ISDN VoicebandModem

  8. “Today’s Typical Network” : ADSL Video Servers ADSL Internet Broadband Network 1.5 to 8Mbit/s 9.6 to 640kbit/s Telephone Network Live Broadcast

  9. ADSL Applications • Internet Access & File Sharing • Video • Broadcast TV • Video On Demand • Voice over IP via DSL • Teleworking • Online Education & Shopping • Telemedicine • Online Gaming

  10. How Does DSL Work? • Functional Elements • Use of Bandwidth • Channel Separation & POTS Splitter • New IP-centric Architecture

  11. ADSL Modem Structure Mbit/s Mbit/s ADSL Modem ADSL Modem kbit/s kbit/s Line POTS Filter POTS Filter POTS Linecard Exchange End Customer End

  12. Transmission Convergence Rates/multiplexing Forward Error Control (FEC) Framing/mapping Protocol processing OAM processing Alternatives Bit Synchronous (STM) Packet Mode ATM Mode ADSL Modem Functions Physical Media Dependent Line Code (modulation) Initialisation POTS splitter/interface Scrambler/descrambler Base EOC functions Digital Interface Line Interface Alternatives DMT QAM CAP Baseband

  13. Basic Architecture 10 base T Ethernet 45 or 155 Mbit/s ATM orEthernet ISP Ethernet Hub/Switch CPE or PC ADSL Remote Router ADSL Linecard 10 base T or 100 base T 10 base T Ethernet

  14. IP Architecture QoSBreakthrough! Or IP Transport TR-059 specifies IP Routed Network Architecture to support a mix of IP based services including IP Video from an Application Service Provider, by employing DiffServ.

  15. Today there are variousDSL Technology Options

  16. DSL Forum-Continuous work to enhance DSL

  17. Key Standards Bodies & Recommendations • ANSI • ETSI • ITU • DSL FORUM • DLNA • UPnP

  18. Digital Subscriber Line Introduction Slide ShowThank You for watching!

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