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