The document presents information on DSL technology including its advantages and types. It discusses how DSL provides always-on high-speed internet access over existing phone lines without requiring a second phone line. It also outlines the signal coding used in DSL and describes applications such as using DSL for leased lines and internet access.

1. A SEMINAR PRESENTATION ON DSL TECHNOLOGY PRESENTED BY CHANDRA PRAKASH RATHORE FINAL B.E.(EIC) www.powerpointpresentationon.blogspot.com

4. DIAL-UP MODE OF INTERNET ACCESS REMOTE ACCESS SERVER (RAS) WITH MULTIPLE E1 INTERFACE AND ROUTING FUNCTION DATA NETWORK INTERFACE AGGREGATION AUTHENTICATION NETWORK MANAGEMENT SUBSCRIBER INTERFACE MODEM BANK TO ISP GATEWAY PSTN NETWORK MODEM PHONE E1 LINE PC

5. SIGNAL CODING USED IN DSL TECHNOLOGY  SPECTRUM DISTRIBUTION : - A M P L I T U D E 0 4Khz 1..1 Mhz Frequency in KHz A M P L I T U D E 0 4khz 1.1Mhz Frequency in kHz FREQUENCY IN KHZ Frequency spectrum used By plain ordinary telephone service Frequency spectrum used by DSL

6. SOME OF THE CODING TECHNIQUE : THE 2B1Q TECHNIQUE: - 10 11 11 01 00 00

9. Leased line for Internet access: LAST MILE COPPER TELECOM TRANSMISSION NETWORK USER TELECOM SERVICE PROVIDER (CUSTOMR END) TELECOM SERVICE PROVIDER (ISP END) ISP

10. Leased line between two user premises LAST MILE COPPER TELECOM TRANSMISSSION NETWORK USER USER LOCAL EXCHANGE (CUSTOMER END) LOCAL EXCHANGE (CUSTOMR END)

11. Leased line connection between two user offices using internet LASE MILE COPPER TELECOM TRANSMISSION NETWORK USER VPN INTERFACE LOCAL EXCHANGE (CUSTOMER END) LOCAL EXCHANGE (ISP END) ISP USER VPN INTERFACE LOCAL EXCHANGE (CUSTOMER END) LOCAL EXCHANGE (ISP END) ISP INTERNET

12. ADSL APPLICATION: ADSL BASED INTERNET ACCESS LAST MILE COPPER WITH ADSL TRANSMISSION NETWORK ADSL MODEM ADSL MODEM ADSL MODEM ADSL MODEM DSLAM BROADBAND REMOTE ACCESS SERVER INTERNET