We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byClarence Scruton
Modified over 3 years ago
ADSL Technology Evolution ADSL2/ADSL2plus/ADSL-RE Peter LeBlanc 2005
©DSL Forum 2005 2 Today there are various DSL Technology Options FamilyITUNameRatifiedMaximum Speed capabilities ADSLG.992.1G.dmt19997 Mbps down 800 kbps up ADSL2G.992.3G.dmt.bis20028 Mb/s down 1 Mbps up ADSL2plusG.992.5ADSL2plus200324 Mbps down 1 Mbps up ADSL2-REG.992.3Reach Extended20038 Mbps down 1 Mbps up SHDSL (updated 2003) G.991.2G.SHDSL20035.6 Mbps up/down VDSLG.993.1Very-high-data-rate DSL 200455 Mbps down 15 Mbps up VDSL2 -12 MHz long reach G.993.2Very-high-data-rate DSL 2 200555 Mbps down 30 Mbps up VDSL2 - 30 MHz Short reach G.993.2Very-high-data-rate DSL 2 2005100 Mbps up/down
©DSL Forum 2005 3 A Brief Examination… ADSL2 –Approved by ITU-T as G.992.3 July 2002 –Features Improved rate – up to 12Mbps by 1Mbps Improved reach – around 600ft / 180m –Power cutback capability –Reduced framing overhead –Better modulation efficiency –Channelisation capability –Bonding of lines
©DSL Forum 2005 4 A Brief Examination… ADSL2+ (or ADSL2plus) –Approved by ITU-T as G.992.5 January 2003 –Features Much increased rates – up to 20Mbps by 1Mbps –Doubled downstream frequency band to 2.2Mhz Reduced cross talk Allows provision of advanced services Builds on all ADSL2 features Legacy interoperable
©DSL Forum 2005 5 Timing and Implementation ADSL2-now ADSL2+-now VDSL (1)-now VDSL2-late 2005 –Chipsets being released in quantity –Manufacturers assume ratification by end September 2005
©DSL Forum 2005 6 Service Migration Issues ADSL2+ –Backward interoperable Services now available Being installed as the “standard” modem chip set Interoperability problems effectively overcome VDSL2 –ADSL, ADSL2 and ADSL2+ interoperable Chip sets coming available very fast Modems will be in mass supply in early 2006
©DSL Forum 2005 7 Increasing Revenue Triple / Quad play is becoming a reality! –ADSL2+ and VDSL2 both offer wide area 20+Mbps multi-channel speeds Allows FTTC and direct from exchange service Full service residential 50Mbps by 10Mbps – max Wide area business Ethernet Feeder transport to remote nodes – using bonding 3 x HDTV (VDSL2), Internet, voice, gaming etc
©DSL Forum 2005 8 Network Scalability ADSL2+ and VDSL2 –With VDSL2 now approved: Backward compatible with ADSL2+ etc Offers highly scalable networks Creates new flexibility for service providers Steadily take fibre closer to the subscriber –Migrate ADSL → ADSL2+ → VDSL2 Easily implemented service expansion and upgrade
©DSL Forum 2005 9 Standards evolution empower Video delivery at higher speeds ADSL2plus (G.992.5) >downstream bandwidth boost up to 24.5 Mb/s Reach Extended ADSL: RE-ADSL2 (G.992.3 annex L) >loop reach increase of 600 to 900 m at low rates (192 kb/s DS + 96 kb/s US) Next Generation ADSL: ADSL2 (G.992.3) performance improvement (+100 kb/s on average) improved interop, loop diagnostics, robustness > improved initialization & fast start-up > power management ADSL Double upstream (G.992.3/5 annex M) >double upstream bandwidth Very high speed DSL bandwidths up to 100 Mb/s on short loops different band plans Plan 997: compromise band plan for symmetric and asymmetric traffic Plan 998: optimized for asymmetry Plan Fx: flexible band plan VDSL2 Most service providers are updating with a triple pack: ADSL2, ADSL2plus and RE-ADSL at the same time
©DSL Forum 2005 10 Summary ADSL2+ and VDSL2 offer triple play at last –Reach allows wider serving areas –Rates allow triple play and enhanced services –Ethernet rapidly taking over from ATM Offers LAN extension type services – no signal conversion –Network architecture evolving faster than ever before – DSL Forum driven
By Taylor and Ed. Uses standard voice telephone lines Uses a modem to place a telephone call to another modem at a remote site Two major disadvantages.
Chador Wangdi Page 1of15. Analog (up to 56k/ dial up access) Using a modem connected to your PC, users connect to the internet when the computer dials.
Using Telephone and Cable Networks for Data Transmissions
Using Telephone and Cable Networks for Data Transmission
High Speed Digital Access
Presented by: Eng. Karam Al-sofy
The Physical Layer "You can never be too rich, too thin, or have too much bandwidth" Our goals: understand characteristics of various transmission media.
DSL and Cable Modems Broadband Communication Technology Murdoch, Tyler Nguyen, Hien Piltzer, Gabriel.
Unleashing Next-Generation Cable Puma5 and the gateway to DOCSIS ® 3.0.
TYPES; 1. Analog Analog 2. ISDN ISDN 3. B-ISDN B-ISDN 4. DSL DSL 5. ADSL ADSL 6. SDSL SDSL 7. VDSL VDSL 8. CABLE CABLE 9. Wireless Wireless 10. T-1 lines.
DSL technology and deployment
The role of wireline access technologies to bridge the digital divide BB for All Cluster workshop “How to bridge the digital divide ?”
1 xDSL Technical Overview Oct DSL Market Drivers & Enablers Service Provider Drivers Telco's desire to compete with Cable companies Additional.
ONE PLANET ONE NETWORK A MILLION POSSIBILITIES Barry Joseph Director, Offer and Product Management.
New ADSL2 Standards Which delivers improved rate and reach performance, advanced diagnostics capabilities, standby modes, and more to broadband designers.
Sistem Broadband Pertemuan 13 Matakuliah: H0122 / Dasar Telekomunikasi Tahun: 2008.
Long Reach Ethernet - LRE
Broadband local access technology
SG-DSL ppt Page 1 Phoneline Networking PLANET xDSL Solution.
Spring 2006Data Communications, Kwangwoon University9-1 Chapter 9. High-Speed Digital Access 1.DSL Technology 2.Cable Modem 3.SONET.
© 2018 SlidePlayer.com Inc. All rights reserved.