XDSL Technology & GSV Products

Victor Zhou

2002.5.24

GT03001V1

What are xDSL?

• Stand for x Digital Subscriber Line• Public network access technologies• Data,voice,and video can be carried• Over twisted-pair copper wire on the last

mile• Between a network service provider CO

and CPE

Different Type of xDSL• ADSL Asymmetric Digital Subscriber Line

• HDSL High Bit-Rate Digital Subscriber Line

• SDSL Symmetric Digital Subscriber Line

Single-Line Digital Subscriber Line

• VDSL Very High Bit-Rate Digital Subscriber Line

Other Technology Term• ADSL Lite• R-ADSL

Rate-Adaptive Digital Subscriber Line • MDSL Moderate Speed Digital Subscriber Line

• CO Central Office • DSLAM DSL Access Multiplexer

• CPE Customer Premise Equipment

Other Technology Term (cont)

• FDM Frequency Division Multiplexing

• DLC Digital Loop Carrier

• CAP Carrierless Amplitude Modulation

• DMT Discrete Multitone

• QAM Quadrature Amplitude Modulation

Other Technology Term (cont)

• POTS

Plain Old Telephone Service

• PSTN

Public Switched Telephone Network

• Spiliter

Technology&Application Comparison

• Technology Speed Distance Application

ADSL Lite Up to 1Mbps(down)

Up to 512kbps(up)

18000 feet Internet access,IP telephony,video telephone

ADSL

/R-ADSL

1.5- 8 Mbps(down)

Up to 1.544Mbps(up)

18000 feet

(12000 feet for fastest speeds)

Internet access,Remote LAN access,video on-demand,VoIP

HDSL 1.544Mbps full duplex(T1)

2.048Mbps full duplex(E1)

(uses2-3 wire pairs)

12000-15000 feet

PBX interconnection Frame Relay traffic aggregator

LAN interconnect

SDSL 1.544Mbps full duplex(T1)

2.048Mbps full duplex(E1)

(uses 1 wire pairs)

10000 feet PBX interconnection Frame Relay traffic aggregator

LAN interconnect

VDSL 13- 52 Mbps(down)

1.5-2.3Mbps(up)

(UP TO 34Mbps if symmetric)

1000 -4500feet

(depending on speed)

Multimedia Internet access,

HDTV

How ADSL Modems Work

upstream

FDM Echo Cancellation(EC)

freq freq

downstreamvoice voice

Upstream

downstream

0-4khz 25khz 200khz 1104khz 0-4khz 25khz 200khz 1104khz

DSLAM Structure

Other

Broadband

Equipment

DSLAM

ATM

Server

IP

Router

ATM

Server

OtherBroadband

Equipment

co

PSTN

Switch

RAM

SDSL PC/Telephone

HDSL

ATU-R

PC with NIC

RAM: Remote Access Multiplexer

ATU-R: ADSL Termination Unit-Remote

Set -box

PC/Telephone

Multi- service

Multi- service

Internet

GSV Product Market Segments

Central Office ADSL Products

• FourtePlus

• G16

FourtePlus Overview• Highest Performance for All Market

– ITU G.DMT, G.Lite

– ANSI T1.413i2

– Annex A, B, C & H

• Highest Density– Total Area – 1.4 sq. in./ 9 sq cm

• Lowest Power– G.DMT: 1.35 W - G.Lite under 1.0 W

• Fastest Time-to-Market– Using Existing Production Fourte Firmware

• Highest Functionality

Quad DSP

Quad AFE

Line Drivers

GS7266+

Titanium G16 Product Features

• Highest Density, Lowest Power DMT Available

• Enables Rapid time to Production

• Lowest Power– G.DMT: 1.2 W - G.Lite under 1.0 W

• Highest Density

– Total Area 7.5 sq cm (1.1 sq. in.)

• Supports all ADSL Markets and Standards

– ITU G.DMT, G.Lite

– ANSI T1.413i2

– Annex A, B, C & H

• Highest Functionality

– Higher Speeds (12 Mbps)

– Concurrent Voice Support

x 4

x 16

GS7866

One Solution for all Markets

One hardware design supports all Standardsand Markets through firmware downloads

World WideILECs – G.DMT & T1.413i2CLECS – G.DMT & G.lite

GS7266+

Europe(annex B)

Japan(annex C/H)

Common Hardware Platform

Firmware Downloads

ADSL over POTS

ADSL over ISDN

ADSL/SDSLFor Japan

DMT: 12 M

b/s Down, 1 M

b/s Up

Lite: 4

.5 Mb/s Down, 1

Mb/s

8 Mb/s Down, 1 Mb/s Up

Annex C: 8 Mb/s Down, 1 Mb/s Up

Annex H: 192 kb/s to 3 Mb/s Symmetric

ApplicationSolutions

Best

Perform

ance

2B1Q4B3T

VDSL MarketsGlobespanVirata provides the only multi-port, multi-service chipset addre

ssing all ADSL/ VDSL markets:

– Digital Loop Carrier (DLC) / Optical Network Unit (ONU)

– Multi Dwelling Unit (MDU)

– Multi Tenant Unit (MTU)

– Multi Hospitality Unit (MHU)

CentralOffice

MHU

MDU

MTU

FTTB

FTTB

FTTB

FTTC

DLC/ONU

GlobespanVirata ADSL/ VDSL Advantage Fastest Time to Production with lowest system cost

• Based on field proven ADSL (8th generation) architecture

• Enables highest density and lowest power solutions• Leverages cost reduced ADSL overhead (e.g. POTS

splitters, power supplies, memory, etc)• Common API with ADSL for minimal software

development

ADSL/ VDSL convergence• Maximum connectivity via ADSL for longer reach• Configurable spectrum for non-ADSL service

compatibility• Configurable PSD for ADSL service co-existence

Titanium Express ConvergenceOnly Titanium Express supports ADSL and VDSL =>

12 times the coverage provided by QAM based solutions

ONU- 16/1 Mbps up to 4.5 kft

MDU- 22/3 Mbps up to 3 kft

DLC- ADSL connectivity up to 16 kft

Downstream Rate vs. Area

0

5

10

15

20

25

0 1 3 5 7 11 14 19 24 29 35 42 49 57 66 75

Area (sq. km.)

Ra

te (

Mb

ps)

ADSL VDSL16 VDSL

Titanium Express

QAM

10BS

Only Titanium Express builds upon ADSL designs =>Minimum development effort & risk for fastest time to production

Titanium Express Compatibility

Only Titanium Express has programmable G.993.1 compliant egress =>

Minimal impact on existing servicesMaximum quality of VDSL service

HomePNA(4MHz-10MHz)

Digital Phone Service(0-100kHz)

Amateur Radio Interference(1.8MHz-2MHz)

ADSL/VDSL(25kHz-5.2MHz)

BRCM non-compatible

INFX non-compatible

Leader in the SHDSL Market

The GlobeSpan Legacy of DSL Convergence

ADSL G.DMT, G.Lite, T1.41

3 Annex A

ADSL Annex B

ADSL Annex C

ADSL Annex A Annex B Annex CAnnex H

SHDSL

ADSL Annex A Annex B Annex CAnnex H

SHDSL

Titanium

FourtePlus/G12/G16 G24/Octane

Orion

ADSL Annex A Annex B Annex C

Fourte

Annex H

GSV CPE Solution

GSV New CPE PCI Solution

GSV New CPE USB Solution

GSV New CPE Ethernet Solution

Thank you