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ADSL Technology

Project. On. ADSL Technology. Broadband. Broadband= ‘Broad’ + ‘Band’ Transportation of multiple signals & traffic simultaneously. Medium- OFC, twisted Cu pair, wireless. Before broadband, Dial-up was in use. Cable modem introduced in 1997. Became familiar in 2001.

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ADSL Technology

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  1. Project On ADSL Technology

  2. Broadband • Broadband= ‘Broad’ + ‘Band’ • Transportation of multiple signals & traffic simultaneously. • Medium- OFC, twisted Cu pair, wireless. • Before broadband, Dial-up was in use. • Cable modem introduced in 1997. Became familiar in 2001..

  3. Digital Subscriber Lines(DSL)

  4. What is DSL.? • High Internet Access over existing telephone lines. • Utilizes bridge or router at customer location connects to DSLAM. • The DSLAM connects and we are connected to internet. • DSL technology introduced in 1989.

  5. Features of DSL • Fast Access. • Constant Connectivity. • Big-business bandwidth at small-business price. • Uninterrupted phone services.

  6. Introduction to ADSL • Enables high speed data transfer in same Cu telephone lines. • Utilizes the frequencies that is not used by telephones calls. • A splitter allows single telephone lines to be used for both. • At exchange line terminates at DSLAM.

  7. Operation

  8. ADSL capacities • The "upstream" and "downstream" pipelines have different capacities. • ADSL broadband can transfer data at rates of 1.5 to 9 Mbps when receiving data. • The ability of ADSL to send data, is limited to between 16 to 640 Kbps.

  9. ADSL Strength • Inexpensive • Widely available • High speed downloads and surf. • Always connected, do not monopolize phone lines. • Multiple user access without degradation

  10. ADSL weakness • Not available everywhere, say above 5.5 km from exchange. • Speed is affected as distance increases. • Web conferencing, web hosting, VoIP services are not well suited to ADSL.

  11. Alternatives • IDSL • SDSL • VDSL

  12. IDSL • ISDN Digital Subscriber Lines • Speed 144kbps. • Not available in all countries

  13. SDSL • Symmetric Digital Subscriber Line • Up and Downstream Bandwidth are same. • Narrow cable supports only data, not analog calls. • Speed- 1.54 - 2.04 Mbps • Max distance- 3 km. (10,000 fts) • Needs separate copper pair.

  14. VDSL • Very-high-bit-rate DSL. • Faster than ADSL . • Speed • Cu pair • Down- 52Mbps, Up-16Mbps • Coaxial cable • 85 Mbps Up & Down

  15. Thank You

  16. Made by- • Pratik Sadegaonkar • Rahul Yadav • Rahul Marar • Rajesh Gavel • Jaimala Jain

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