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 ondemand,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
Echo Cancellation(EC)
FDM
voice
upstream
0-4khz 25khz 200khz
downstream
1104khz
voice
freq 0-4khz
Upstream
downstream
25khz
200khz
freq
1104khz
DSLAM Structure
Internet
IP
Router
co
PC with NIC
ATU-R
ATM
Server
Other
Broadband
Equipment
ATM
Server
Set -box
PC/Telephone
DSLAM
HDSL
Multi- service
SDSL
PC/Telephone
RAM
Multi- service
Other
Broadband
Equipment
PSTN
Switch
ATU-R: ADSL Termination Unit-Remote
RAM: Remote Access Multiplexer
GSV Product Market Segments
Central Office ADSL Products
• FourtePlus
• G16
FourtePlus Overview
• Highest Performance for All Market
Quad DSP
GS7266+
Quad AFE
Line Drivers
– 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
Titanium G16 Product Features
• Highest Density, Lowest Power DMT Available
• Enables Rapid time to Production
GS7866
x
x
4
16
• 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
One Solution for all Markets
World Wide
ILECs – G.DMT & T1.413i2
CLECS – G.DMT & G.lite
One hardware design supports all Standards
and Markets through firmware downloads
Firmware
Downloads
Application
Solutions
ADSL over POTS
8 Mb/s Down, 1 Mb/s Up
ADSL over ISDN
ADSL/SDSL
For Japan
GS7266+
Europe
Common
Hardware Platform
(annex B)
Japan
(annex C/H)
VDSL Markets
GlobespanVirata provides the only multi-port, multi-service chipset
addressing all ADSL/ VDSL markets:
– Digital Loop Carrier (DLC) / Optical Network Unit (ONU)
– Multi Dwelling Unit (MDU)
– Multi Tenant Unit (MTU)
– Multi Hospitality Unit (MHU)
DLC/ONU
FTTC
Central
Office
FTTB
FTTB
MDU
MTU
FTTB
MHU
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 Convergence
Only Titanium Express supports ADSL and VDSL =>
12 times the coverage provided by QAM based solutions
Downstream Rate vs. Area
25
Titanium Express
Rate (Mbps)
20
QAM
15
MDU- 22/3 Mbps up to 3 kft
10BS
10
5
ONU- 16/1 Mbps up to 4.5 kft
0
0
1
3
5
7
11 14
19 24
29 35 42
49 57
66 75
Area (sq. km.)
DLC- ADSL connectivity up to 16 kft
ADSL
VDSL16
VDSL
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 services
Maximum quality of VDSL service
HomePNA
(4MHz-10MHz)
INFX
non-compatible
ADSL/VDSL
(25kHz-5.2MHz)
BRCM
Amateur Radio Interference
non-compatible
(1.8MHz-2MHz)
Digital Phone Service
(0-100kHz)
Leader in the SHDSL Market
The GlobeSpan Legacy of DSL Convergence
Titanium
ADSL
G.DMT, G.Lite,
T1.413 Annex A
Fourte
FourtePlus/G12/G16
ADSL
Annex A
Annex B
Annex C
ADSL
Annex B
ADSL
Annex C
ADSL
Annex A
Annex B
Annex C
Annex H
Annex
H
Orion
SHDSL
G24/Octane
ADSL
Annex A
Annex B
Annex C
Annex H
SHDSL
GSV CPE Solution
GSV New CPE PCI Solution
GSV New CPE USB Solution
GSV New CPE Ethernet Solution
Thank you