A SEMINAR PRESENTATION ON

DSL TECHNOLOGYPRESENTED BY

CHANDRA PRAKASH RATHOREFINAL B.E.(EIC)

www.powerpointpresentationon.blogspot.com

CONTENTS

• INTRODUCTION OF DSL TECHNOLOGY• ADVANTAGES OF DSL• DIAL-UP MODE OF INTERNET ACCESS• SIGNAL CODING USED IN DSL• TYPES OF DSL TECHNOLOGY• APPLICATION• REFERENCE

ADVANTAGES OF DSL:

• DSL IS ALWAYS ON,24 HRS A DAY• NO DIAL-UP REQUIRED• DATA SECURITY• NO SECOND PHONE LINE REQUIRED• USE THE PHONE AT THE SAME TIME YOU ARE ON-LINE• NO DROPPED CONNECTIONS• SUPPER FAST SPEEDS• COST EFFECTIVE

DIAL-UP MODE OF INTERNET ACCESS

REMOTE ACCESS SERVER(RAS) WITH MULTIPLE E1 INTERFACE AND ROUTINGFUNCTION

DATA

NETWORKINTERFACE

AGGREGATIONAUTHENTICATION

NETWORKMANAGEMENT

SUBSCRIBERINTERFACEMODEM BANK

TO ISP GATEWAY

PSTNNETWORK

MODEM PHONE

E1 LINE

PC

SIGNAL CODING USED IN DSL TECHNOLOGY

      SPECTRUM DISTRIBUTION: -

AMPLITUDE

0 4Khz 1..1 Mhz Frequency in KHz

AMPLITUDE

0 4khz 1.1Mhz

Frequency in kHz

FREQUENCY IN KHZ

Frequency spectrum usedBy plain ordinary telephone service

Frequency spectrum used by DSL

SOME OF THE CODING TECHNIQUE :

THE 2B1Q TECHNIQUE: -

10

11 11

01

00 00

TYPES OF DSL TECHNOLOGY

• IDSL

• G.LITE• HDSL• G.SHDSL• ADSL

• VDSL

APPLICATION

HDSL APPLICATION - LEASED LINE

• LEASED LINE FOR INTERNET ACCESS• LEASED LINE BETWEEN TWO USER PREMISES

• LEASED LINE BETWEEN TWO USER PREMISES USING INTERNET

Leased line for Internet access:

LAST MILE COPPER

TELECOM TRANSMISSION NETWORK

USER

TELECOMSERVICEPROVIDER(CUSTOMR END)

TELECOMSERVICEPROVIDER(ISP END)

ISP

Leased line between two user premises

LAST MILE COPPER

TELECOM TRANSMISSSIONNETWORK

USER

USER

LOCAL EXCHANGE(CUSTOMEREND)

LOCAL EXCHANGE(CUSTOMREND)

Leased line connection between two user offices using internet

LASE MILE COPPER

TELECOM TRANSMISSIONNETWORK

USER VPNINTERFACE

LOCAL EXCHANGE (CUSTOMER END)

LOCAL EXCHANGE(ISP END)

ISP

USER VPN INTERFACE

LOCAL EXCHANGE(CUSTOMER END)

LOCAL EXCHANGE(ISP END)

ISP

INTERNET

ADSL APPLICATION:

ADSL BASED INTERNET ACCESS

LAST MILE COPPER WITH ADSL

TRANSMISSION NETWORK

ADSL MODEM

ADSL MODEM

ADSL MODEM

ADSL MODEM

DSLAM

BROADBANDREMOTEACCESS SERVER

INTERNET