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DSL In Jordan Eng. Khaled Soboh DSD Manager Jordan Telecom Jordan Contents • Definition and Introduction • xDSL and ADSL History • xDSL Benefits • • • • • • xDSL Deployment Hurdles Jordan Internet Project JT Data Network Services xDSL Architecture Schools Project Conclusions and Recommendations Definition and Introduction • DSL stands for Digital Subscriber Line and is a modem technology that converts the existing single copper twistedpair PSTN lines into high-speed internet (multimedia: audio, video, data, …) access paths. • xDSL Flavors: The x in xDSL is simply a way of notating the variety of flavors of DSL as SDSL, HDSL, ADSL, G.lite, G.SHDSL, …. Each flavor has its own limitations, capabilities, and offers different speeds • The "S" in SDSL stands for symmetric which means that up and down streams are the same speed Definition and Introduction (cont) • SDSL is targeted to business market because so many applications require high-speed connectivity for data applications. • The “A" in ADSL stands for Asymmetric which means that the down stream is higher than the upstream • ADSL asymmetric speeds are predominantly targeted to the consumer market • The “H" in HDSL stands for High data rate. HDSL is One of the most mature of all DSL technologies and it is the most common way of provisioning E1(2Mb/s) Lines xDSL and ADSL History 1985 -Bell Labs discovers a new way to make traditional copper wires support new digital services 1990 -- Phone companies start deploying High-Speed DSL (HDSL) to offer T1 (E1) service on copper lines without the expense of installing repeaters. Phone companies begin to promote ADSL as a way to enter the video market. 1995 -Innovative companies begin to see ADSL as a way to meet the need for faster Internet access Now -- ADSL is being deployed for fast Internet access across the United States. xDSL Benefits • DSL can be used to transmit applications between users • Video conferencing • IP Faxes • Remote connections to a corporate LAN • Fast Internet access • Interactive multimedia XDSL Deployment Hurdles • State of the Local Loop – Load coils and Bridge Taps – Differing wire gauge used in lines – Wide Noise and Crosstalk • Line lengths and insulation • Spectral interference • Interoperability and Standards • Pair Gain Systems XDSL Deployment Hurdles (Cont) • Loop Testing and Qualification – – No centralized testing mechanism Automated Testing of loops Jordan Internet Project • Upon the recommendations of his Majesty King Abdullah the 2st , the Jordan internet project (IP/ATM) was lunched in 1/12/2000 covering Amman area as a first stage • At the mean time this project covers all over Jordan supporting all kinds of internet and leased line services JT IP/ATM Network JT ATM backbone the 3 sites are in Amman Governorate Sites E1s E1s ADSL ADSL ADSL ADSL SDSL SDSL TLA-ALI 7470 ABDALI 7470 STM-4 TLA–ALI POPs TLA-ALI ASAMs STM-4 ABDALI POPs ABDALI ASAMs STM-4 CENTRAL 7470 CENTRAL ASAMs ADSL ADSL SDSL CENTRAL POPs JT Data Network Services • TDM services: Analog and digital P2P or E2E Leased Lines from 9.6 kb/s up to E1, the most used interfaces are: V.35, G.703 • ATM services: SDSL and SHDSL leased lines, Frame Relay and ADSL • Switching services: ISDN (BRI and PRI) xDSL Architecture SDSL Architecture WWW SDSL DSLAM Data Network SDSL SDSL ADSL Architecture DSLAM Splitters Card Data Network Splitter MDF ADSL PSTN ADSL Architecture (cont) •ADSL consists of the local loop, an ADSL modem at both ends of the loop; that is, one at the (CO) and one at the CP and a (POTS) splitter also at both ends of the loop •DMT: divides the available twisted-pair spectrum above 25KHz into 256 downstream subchannels of 4KHz each. QAM is then applied to each subchannel according to its individual performance ADSL Architecture (cont) Mbit/s kbit/s Mbit/s ADSL Modem ADSL Modem Line POTS Filter POTS Filter POTS Linecard Exchange End Customer End kbit/s Full-rate ADSL • Full-rate ADSL boasts data rates ranging from 1.5 to 8 Megabits per second “downstream” from the Internet to your computer • “Upstream” data rates from your computer to the Internet are as high as 1 Mbps • Potential data rates decrease with increased distance from the phone company’s CO (central office) • Costs for the service are more expensive than the new, lower data rate “G.Lite” ADSL ADSL Reliability • One strength of phone providers is their small number of service outages per year, something cable companies cannot claim. • Even if the power goes out, you will still be able to make phone calls. • Unlike cable modems, your connection speed will not be affected by how much bandwidth your neighbors use. ADSL target customers Many target applications for ADSL are naturally asymmetric as: • Internet and remote LAN access • Movies and television: Video on Demand • Distance learning: schools • Interactive games and File Download • Web Surfing and Home shopping • Video conferencing ADSL statistics Year Users 2001 700 2002 2100 2003 3000 •To meet the specific needs of both the home and business users, ADSL is available in two offers, 512/128Kbps & 1M/256Kbps •Total No. of ADSL customers is 3000 •1000 are schools •2000 are home and business customers ADSL benefits • Superior speeds and flexibility • An 'always on', 'always available', 24/7 connection with flat rate charging • It's all available at an acceptable low cost. • Freedom in Choice among several ISP’s • High data security How do I get ADSL? • ADSL Service Providers • Local phone companies (JT) • Local Internet service providers • ADSL Modems: From (JT) NOC ADSL Order Handling Process Signed Contract Account Manager Account Manager Chooses appointme nt with the customer Fills in work order and sends it to DSD DSD team KEY RAU RAU Sends work order to NOC DSD team At the customer premises, checks completion of the installation modifications & installs splitter & modem BAS: Broad Band Access Server NOC: Network Operation Center LLP: Local Loop Plant LL : Leased Line ISP: Internet Service Provider DSD: Digital Services Department IU : Intervention Unit OSP: Out Side PLant DSD coordinator Sends work order to RAU and DSD team Customer Tests ASDL with laptop and fills in intervention report DSD coordinator Checks Intervention Report, sends it to Account Manager Signs Intervention Report Configure BB (ATM/IP) parameters according to MDF and ISP DSD team Jumpering at MDF according to BB parameters DSD team Sends Intervention Report to DSD Coordinator Account Manager Updates Customer Account - Operations and Maintenance Process - Billing Process - Customer Care Process - CCBS ADSL Fault Handling • • • • • • Customer reports problem to Hotline team Open trouble ticket By Hot line team 1st level diagnosis by Hot Line Technical diagnosis by (DSS, NOC, ATM) Problem localization and repair Close trouble ticket by Hot line and contact the customer ADSL and ISPs • ADSL only connects you to your ISP, it is your ISP that connects you to the Internet. So, to maximize the benefits of a fast ADSL connection, your ISP must be up to the task. A fast connection is not much use if your ISP is the weakest link in the communications chain ADSL Loop Qualification • ADSL DMT line code is flexible and its performance is very dependent on the loop length and noise conditions which is measured by special xDSL line testers: • Attenuation: 57@300kHz • Noise: SNR, Cross talk (FEXT), impulse N. • Loop resistance and insulation ADSL vs. Other Modems Full ADSL G.lite ADSL ISDN 56K 28.8K 14.4K 0 2000 4000 6000 8000 Maximum Speed - Actual speed will vary Schools Project Ministry of Education Requirements • The Ministry has established ambitious goal to have every school connected with high bandwidth enabling both teachers and students to have affordable Elearning opportunities • This project, once materialized, will enable 3000 nationwide schools to enjoy both inter/intranet platforms • A broadband solution is required, in order to manage properly the E-learning applications JT’s Proposal: Introduction The success of educational reform is ultimately dependent on the effective use of E-learning, JT is therefore eagerly prepared to meet the challenges set forth by the Ministry of Education in its reform process Success Factors of the Project The following are recognized as being the success factors of the project • Timely implementation of project • Evolution of bandwidth requirements / Scalability • Coordination between the two parties First Success Factor Timely implementation of project JT understands that timely implementation is a crucial element for the success of the project, the following is JT’s proposed implementation plan: • 500 schools to be connected on or before end of September 2002 • 200 schools to be connected thereafter every month Second Success Factor Evolution of bandwidth requirements • The bandwidth requirements are dynamic and are dependent on variables such as number of PCs, workload and applications utilized • The proposed solution is scalable and caters for the evolution of bandwidth requirements Third Success Factor Coordination between the two parties • Close coordination must be maintained between the two parties in order to oversee the successful implementation of project • Contact officers to be nominated from both parties Technical Solution • DSL technology will be implemented over copper as optimal solution for MOE’s current and foreseen future requirements • The bandwidth made available by this technology will enable the following usage profiles: Email and Internet E-learning Video Conferencing Jordan Schools Project • An agreement was signed with the MOE in January 2002 by which JT will provide Internet access service for about 3000 public schools via ADSL or LL connectivity • Part of the project works is the internal wiring concerning MOE sites • MOE authorized JT to employ electrical subcontractors to do this work and to pay the expenses on behalf of MOE • MOE will repay these expenses for JT Jordan Schools Project (cont) Internal Wiring for Schools One pair terminal Internal wiring twisted pair JT box Feeding Hole Entrance Power socket RJ11 socket Earthen System Jordan Schools Project (cont) • Schools project started in Feb. 2002 • 3000 schools are to be connected via ADSL & SHDSL (ATM) for Internet & E learning • Up to now 1076 schools are already connected to Queen Rania Center which acts as an ISP Jordan Schools Project (cont) • School Project Progress Report Summary up to 23/2/2003 Total Qualification 1589 Qualified Total Survey 1147 Total Internal Wiring 1147 Total Activation 1076 Jordan Schools Project (cont) Schools Project Follow up: • Regular weekly meeting with Marketing sector to discuss the progress report and the obstacles for this project • Regular meetings every two weeks with MOE and marketing sector to address all obstacles IP connectivity using DSL over Copper Broadband Switch Network ( ATM) Queen Rania Center Servers & Routers High-Capacity Backbone Links Network Management Center ADSL Access Network New Optical Cable Local Exchange ADSL POTS Schools Internet Access (ADSL) JT Network Management Centre PSTN Filter Hashem IP ADSL LT ATM NT NT Filter ADSL LT I* Bus 155 Mbit/s BAS ASAM Broadband POP Queen Rania Center (ISP) WWW ADSL modem Network Architecture JT access network WWW outside Jordan Through Hashem School School B Optical STM- 1 ATM STM- 1 ChE 1 MOE Directorate Optical Fiber 8 Mbps JT Data backbone Network Queen Rania Center Maintenance Measure • Jordan Telecom undertakes to maintain the network under its responsibility for the duration of the contract • The project will be supported by 24X7 supervision, Hotline & qualified intervention DS teams Conclusions and Recommendations • • • • Lowering xDSL prices to increase spread ISP bandwidth must be sufficient Creating new xDSL profiles (offers) Make realistic and profitable product and service plans – Do customers exist for this product or service? – Are they willing to pay a compensatory price for the product at projected costs? – Why is the product competitively advantageous? What are the competitive products or services? Questions, Comments, Suggestions? Thank You