santosjj
2010-08-25, 03:50 AM
Table of Contents
1. DOCUMENT USAGE & SCOPE 5
2. INTRODUCTION 7
3. UNDERSTANDING A COPPER PAIR 12
3.1 ATTENUATION AND RESULTING DISTANCE LIMITATIONS 12
3.2 HDSL Enters the Scene 13
3.3 BRIDGED TAPS 14
3.4 THE EFFECTS OF CROSSTALK 14
4. GET TO KNOW XDSL 15
4.1 HDSL 15
4.2 Asymmetric DSL (ADSL) 15
4.2.1 Asymmetry : Take Advantage Of The Environment 15
4.2.2 A Bit of History about ADSL Line Codes 15
4.2.3 Splitter 17
4.2.4 ADSL Performance 19
4.3 Very High Data Rate DSL (VDSL) 20
4.4 Rate Adaptive DSL (RADSL) 20
4.5 Universal ADSL (UDSL) or G.lite ADSL 20
4.6 Symmetric DSL (SDSL) 21
4.7 Symmetric High bitrate DSL (SHDSL) 21
4.8 High bitrate DSL2 (HDSL2) 22
4.9 Overview xDSL Types 23
5. XDSL NETWORKS & EQUIPMENT 25
5.1 The xDSL Local Loop Link 25
5.2 ATM and xDSL 26
5.3 xDSL Network Architecture 28
5.4 Overbooking & Contention Ratio 29
5.5 WHOLESALE versus UNBUNDLED LOCAL LOOP (ULL) 30
5.6 DSLAM 32
5.7 Customer Premises Equipment 33
ADSL CPE’s 34
5.7.2 Integrated Access Devices 35
6. XDSL GLOSSARY 37
7. APPENDICES 38
7.1 CAP 38
7.2 DMT 40
1. DOCUMENT USAGE & SCOPE 5
2. INTRODUCTION 7
3. UNDERSTANDING A COPPER PAIR 12
3.1 ATTENUATION AND RESULTING DISTANCE LIMITATIONS 12
3.2 HDSL Enters the Scene 13
3.3 BRIDGED TAPS 14
3.4 THE EFFECTS OF CROSSTALK 14
4. GET TO KNOW XDSL 15
4.1 HDSL 15
4.2 Asymmetric DSL (ADSL) 15
4.2.1 Asymmetry : Take Advantage Of The Environment 15
4.2.2 A Bit of History about ADSL Line Codes 15
4.2.3 Splitter 17
4.2.4 ADSL Performance 19
4.3 Very High Data Rate DSL (VDSL) 20
4.4 Rate Adaptive DSL (RADSL) 20
4.5 Universal ADSL (UDSL) or G.lite ADSL 20
4.6 Symmetric DSL (SDSL) 21
4.7 Symmetric High bitrate DSL (SHDSL) 21
4.8 High bitrate DSL2 (HDSL2) 22
4.9 Overview xDSL Types 23
5. XDSL NETWORKS & EQUIPMENT 25
5.1 The xDSL Local Loop Link 25
5.2 ATM and xDSL 26
5.3 xDSL Network Architecture 28
5.4 Overbooking & Contention Ratio 29
5.5 WHOLESALE versus UNBUNDLED LOCAL LOOP (ULL) 30
5.6 DSLAM 32
5.7 Customer Premises Equipment 33
ADSL CPE’s 34
5.7.2 Integrated Access Devices 35
6. XDSL GLOSSARY 37
7. APPENDICES 38
7.1 CAP 38
7.2 DMT 40