Surfboard SB6120 Cable Modem Data Sheet
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Digital Subscriber Line (DSL) Technologies
CHAPTER21 Chapter Goals • Identify and discuss different types of digital subscriber line (DSL) technologies. • Discuss the benefits of using xDSL technologies. • Explain how ASDL works. • Explain the basic concepts of signaling and modulation. • Discuss additional DSL technologies (SDSL, HDSL, HDSL-2, G.SHDSL, IDSL, and VDSL). Digital Subscriber Line Introduction Digital Subscriber Line (DSL) technology is a modem technology that uses existing twisted-pair telephone lines to transport high-bandwidth data, such as multimedia and video, to service subscribers. The term xDSL covers a number of similar yet competing forms of DSL technologies, including ADSL, SDSL, HDSL, HDSL-2, G.SHDL, IDSL, and VDSL. xDSL is drawing significant attention from implementers and service providers because it promises to deliver high-bandwidth data rates to dispersed locations with relatively small changes to the existing telco infrastructure. xDSL services are dedicated, point-to-point, public network access over twisted-pair copper wire on the local loop (last mile) between a network service provider’s (NSP) central office and the customer site, or on local loops created either intrabuilding or intracampus. Currently, most DSL deployments are ADSL, mainly delivered to residential customers. This chapter focus mainly on defining ADSL. Asymmetric Digital Subscriber Line Asymmetric Digital Subscriber Line (ADSL) technology is asymmetric. It allows more bandwidth downstream—from an NSP’s central office to the customer site—than upstream from the subscriber to the central office. This asymmetry, combined with always-on access (which eliminates call setup), makes ADSL ideal for Internet/intranet surfing, video-on-demand, and remote LAN access. Users of these applications typically download much more information than they send. -
A Technology Comparison Adopting Ultra-Wideband for Memsen’S File Sharing and Wireless Marketing Platform
A Technology Comparison Adopting Ultra-Wideband for Memsen’s file sharing and wireless marketing platform What is Ultra-Wideband Technology? Memsen Corporation 1 of 8 • Ultra-Wideband is a proposed standard for short-range wireless communications that aims to replace Bluetooth technology in near future. • It is an ideal solution for wireless connectivity in the range of 10 to 20 meters between consumer electronics (CE), mobile devices, and PC peripheral devices which provides very high data-rate while consuming very little battery power. It offers the best solution for bandwidth, cost, power consumption, and physical size requirements for next generation consumer electronic devices. • UWB radios can use frequencies from 3.1 GHz to 10.6 GHz, a band more than 7 GHz wide. Each radio channel can have a bandwidth of more than 500 MHz depending upon its center frequency. Due to such a large signal bandwidth, FCC has put severe broadcast power restrictions. By doing so UWB devices can make use of extremely wide frequency band while emitting very less amount of energy to get detected by other narrower band devices. Hence, a UWB device signal can not interfere with other narrower band device signals and because of this reason a UWB device can co-exist with other wireless devices. • UWB is considered as Wireless USB – replacement of standard USB and fire wire (IEEE 1394) solutions due to its higher data-rate compared to USB and fire wire. • UWB signals can co-exists with other short/large range wireless communications signals due to its own nature of being detected as noise to other signals. -
Lecture 8: Overview of Computer Networking Roadmap
Lecture 8: Overview of Computer Networking Slides adapted from those of Computer Networking: A Top Down Approach, 5th edition. Jim Kurose, Keith Ross, Addison-Wesley, April 2009. Roadmap ! what’s the Internet? ! network edge: hosts, access net ! network core: packet/circuit switching, Internet structure ! performance: loss, delay, throughput ! media distribution: UDP, TCP/IP 1 What’s the Internet: “nuts and bolts” view PC ! millions of connected Mobile network computing devices: server Global ISP hosts = end systems wireless laptop " running network apps cellular handheld Home network ! communication links Regional ISP " fiber, copper, radio, satellite access " points transmission rate = bandwidth Institutional network wired links ! routers: forward packets (chunks of router data) What’s the Internet: “nuts and bolts” view ! protocols control sending, receiving Mobile network of msgs Global ISP " e.g., TCP, IP, HTTP, Skype, Ethernet ! Internet: “network of networks” Home network " loosely hierarchical Regional ISP " public Internet versus private intranet Institutional network ! Internet standards " RFC: Request for comments " IETF: Internet Engineering Task Force 2 A closer look at network structure: ! network edge: applications and hosts ! access networks, physical media: wired, wireless communication links ! network core: " interconnected routers " network of networks The network edge: ! end systems (hosts): " run application programs " e.g. Web, email " at “edge of network” peer-peer ! client/server model " client host requests, receives -
Broadband ADSL2+ Modem Dm111pspv2 User Manual
Broadband ADSL2+ Modem DM111PSPv2 User Manual 350 East Plumeria Drive San Jose, CA 95134 USA August 2011 202-10913-01 v1.0 Broadband ADSL2+ Modem DM111PSPv2 © 2011 NETGEAR, Inc. All rights reserved No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means without the written permission of NETGEAR, Inc. Technical Support Thank you for choosing NETGEAR. To register your product, get the latest product updates, get support online, or for more information about the topics covered in this manual, visit the Support website at http://support.netgear.com. Phone (US & Canada only): 1-888-NETGEAR Phone (Other Countries): Check the list of phone numbers at http://support.netgear.com/app/answers/detail/a_id/984. Trademarks NETGEAR, the NETGEAR logo, and Connect with Innovation are trademarks and/or registered trademarks of NETGEAR, Inc. and/or its subsidiaries in the United States and/or other countries. Information is subject to change without notice. Other brand and product names are registered trademarks or trademarks of their respective holders. © 2011 NETGEAR, Inc. All rights reserved. Statement of Conditions To improve internal design, operational function, and/or reliability, NETGEAR reserves the right to make changes to the products described in this document without notice. NETGEAR does not assume any liability that may occur due to the use, or application of, the product(s) or circuit layout(s) described herein. 2 Contents Chapter 1 Hardware Setup Unpack Your New Modem. 7 Hardware Features . 8 Label . 8 Back Panel. 8 Front Panel . -
7022417378.Pdf
Before the Federal Communications Commission Washington, D.C. 20554 In the Matter of ) ) Implementing Public Safety Broadband ) PS Docket No. 12-94 Provisions of the Middle Class Tax Relief and ) Job Creation Act of 2012 ) ) Implementing a Nationwide, Broadband, ) PS Docket No. 06-229 Interoperable Public Safety Network in the 700 ) MHz Band ) ) Service Rules for the 698-746, 747-762 and ) WT Docket No. 06-150 777-792 MHz Bands ) COMMENTS OF THE COALITION OF WISPS FOR FIRSTNET The Coalition of WISPs 1 for FirstNet (“WISP Coalition”), a group of wireless Internet service providers, by counsel and pursuant to Sections 1.415 and 1.419 of the rules of the Federal Communications Commission (“Commission”), hereby submits these comments in response to the Commission’s Notice of Proposed Rulemaking (“ NPRM ”) 2 that seeks comment on certain proposals to implement the Middle Class Tax Relief and Job Creation Act of 2012 (“Public Safety Spectrum Act") 3 and the nationwide public safety broadband network in the 700 MHz band. The WISP Coalition includes small businesses who deliver broadband Internet access services and, in some cases, competitive local exchange services to their communities. The 1 “WISPs” are Wireless Internet Service Providers. The WISPs joining this filing are A Better Wireless, NISP, LLC; Aircado, Inc.; AirLink Internet Services, LLC; Aristotle, Inc.; aXess America, LLC; CellTex Networks, LLC; Digital Video Services; First Step Internet, LLC; Helix Technologies, Inc.; JAB Wireless, Inc.; M 2 Connections, a division of JKM Consulting, Inc.; New Wave Net Corp.; Rural Broadband Network Services, LLC; STL WiMax; Washington Broadband, Inc.; and Wireless ETC, Inc. -
Broadband and the Wisconsin Economy
BROADBAND JANUARY 2021 BROADBAND AND THE WISCONSIN ECONOMY TESSA CONROY STEVE DELLER MATT KURES SARAH LOW Study Series No. 7 AUTHORS JEFFREY GLAZER GAIL HUYKE CHRISTOPHER STARK ACKNOWLEDGEMENTS THANK YOU The EDA-University Center team (Tessa Conroy, Steve Deller, Gail Huyke, Matt Kures, Kristin Runge, and Christoper Stark) is grateful for the expertise shared by the guest contributors. Jeffrey Glazer is a Clinical Associate Professor at the University of Wisconsin-Madison Law School. Sarah Low is an Associate Professor and Fred V. Heinkel Professor of Agriculture at the University of Missouri. We especially owe thanks to Rachel Ramthun and Jackson Parr for their assistance in preparing the final publication and for their constructive suggestions. FUNDING This work was supported by grants from the United States Department of Commerce Economic Development Administration in support of the UW Madison Economic Development Authority University Center (Award No. ED16CHI3030030) and the UW Madison EDA University Center CARES Act Recovery Assistance Grant (Award No. ED20CHI3070047). Any opinions, find- ings, conclusions, or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the U.S. Department of Commerce Economic Development Administration. 1 INTRODUCTION 3 WHAT IS BROADBAND 7 BROADBAND IN WISCONSIN AND ACROSS THE U.S. 16 HOW DID WE GET HERE? 28 WHERE DO WE GO FROM HERE? 30 REFERENCES 32 APPENDIX EXECUTIVE SUMMARY In this study we explore issues related to broadband coverage and importance of coverage to community well-being. Several key conclusions include: • Broadband access is closely related to population density and income levels, meaning the most rural and the lowest-income regions generally have the least access. -
Digital Subscriber Lines and Cable Modems Digital Subscriber Lines and Cable Modems
Digital Subscriber Lines and Cable Modems Digital Subscriber Lines and Cable Modems Paul Sabatino, [email protected] This paper details the impact of new advances in residential broadband networking, including ADSL, HDSL, VDSL, RADSL, cable modems. History as well as future trends of these technologies are also addressed. OtherReports on Recent Advances in Networking Back to Raj Jain's Home Page Table of Contents ● 1. Introduction ● 2. DSL Technologies ❍ 2.1 ADSL ■ 2.1.1 Competing Standards ■ 2.1.2 Trends ❍ 2.2 HDSL ❍ 2.3 SDSL ❍ 2.4 VDSL ❍ 2.5 RADSL ❍ 2.6 DSL Comparison Chart ● 3. Cable Modems ❍ 3.1 IEEE 802.14 ❍ 3.2 Model of Operation ● 4. Future Trends ❍ 4.1 Current Trials ● 5. Summary ● 6. Glossary ● 7. References http://www.cis.ohio-state.edu/~jain/cis788-97/rbb/index.htm (1 of 14) [2/7/2000 10:59:54 AM] Digital Subscriber Lines and Cable Modems 1. Introduction The widespread use of the Internet and especially the World Wide Web have opened up a need for high bandwidth network services that can be brought directly to subscriber's homes. These services would provide the needed bandwidth to surf the web at lightning fast speeds and allow new technologies such as video conferencing and video on demand. Currently, Digital Subscriber Line (DSL) and Cable modem technologies look to be the most cost effective and practical methods of delivering broadband network services to the masses. <-- Back to Table of Contents 2. DSL Technologies Digital Subscriber Line A Digital Subscriber Line makes use of the current copper infrastructure to supply broadband services. -
Digital Multi–Programme TV/HDTV by Satellite
Digital multi–programme TV/HDTV by satellite M. Cominetti (RAI) A. Morello (RAI) M. Visintin (RAI) The progress of digital technology 1. Introduction since the WARC’77 is considered and the perspectives of future The significant progress of digital techniques in applications via satellite channels production, transmission and emission of radio are identified. Among these, digital and television programmes is rapidly changing the established concepts of broadcasting. multi–programme television systems, with different quality levels (EDTV, SDTV) and possible The latest developments in VLSI (very–large scale evolution to HDTV, are evaluated in integration) technology have significantly contrib- uted to the rapid emergence of digital image/video terms of picture quality and service compression techniques in broadcast and informa- availability on the satellite channels tion–oriented applications; optical fibre technolo- of the BSS bands (12 GHz and gy allows broadband end–to–end connectivity at 22 GHz) and of the FSS band (11 very high bit–rates including digital video capabil- GHz) in Europe. A usable channel ities; even the narrow–band terrestrial broadcast capacity of 45 Mbit/s is assumed, as channels in the VHF/UHF bands (6–7 MHz and 8 well as the adoption of advanced MHz) are under investigation, in the USA [1] and channel coding techniques with in Europe [2], for the future introduction of digital QPSK and 8PSK modulations. For television services. high and medium–power satellites, in operation or planned, the The interest for digital television in broadcasting receiving antenna diameters and multimedia communications is a clear exam- required for correct reception are ple of the current evolution from the analogue to reported. -
Understanding Bluetooth® 5
Volume 1 Issue 1 Understanding Bluetooth® 5 Primary Logo Secondary Stacked Logo 1 Contents 3 Foreword 4 A Look Back and Ahead 5 Case Study: Bluetooth 5 Automatic Parking Meter 6 Bluetooth 5 Mesh Networking 11 Industry Experts Roundtable 14 Bluetooth 5: Your Questions Answered Weclome From the Editor For design engineers, “methods” can mean many things: The Scientific Method, for example, provides the basis for testing hypotheses. The Engineering Method allows us Editor to solve problems using a systematic approach. Method Engineering allows us to create Deborah S. Ray new methods from existing ones. And, I think we’ve all said, “There’s a method to my madness,” when creating new designs or applying existing ones in new ways. Contributing Writers Barry Manz Publishing high-quality technical content is just one method we use to enable our customers Steven Keeping and subscribers to apply technologies and electronic components in new ways and to help drive Steve Hegenderfer revolution and solutions in their various industries. Methods was conceived to provide a new format Technical Contributors to meet our readers’ evolving information needs. And with the resounding success of our Bluetooth 5 Paul Golata webinar on April 11—and the huge thirst for more information around the concepts and applica- Rudy Ramos tion of the new standard—we knew we had the topic for the first edition of our new ezine. So, like Design and Layout Method Engineering, new methods of content delivery came from a project that was underway. Ryan Snieder This first issue of Methods includes a variety of Bluetooth 5 related content that supports and extends the webinar. -
Etherfast® Cable Modem Take Off at the Speed of Broadband Internet
Instant Broadband Series EtherFast ™ ® Cable Take Off at the Speed of Modem Broadband Internet with USB and Ethernet Connection Own Simple and Affordable Cable Internet Connectivity re you ready to step up to high-speed broadband Internet? The EtherFast A Linksys provides you with® Cablethe perfect Modem solution with USBfor a from fast and easy Internet connection. Now you can make the most of the Internet and cruise the Web at speeds you never imagined possible. Cable Modem Internet service means no more waiting for lagging downloads—even the most graphic-intensive Web pages load in seconds. And if you’re looking for convenience and affordability, the EtherFast ® Cable Modem with USB really delivers! Installation is quick and easy. The Plug-and-Play EtherFast with USB connects directly to any USB-ready PC—just plug it in and you’re ready to surf the Internet. Or connect® Cable it toModem your LAN using a Linksys router and share that speed with everyone on your network. So if you’re ready to enjoy broadband Internet speed, then EtherFast ® Cable Modem with USB you’re ready for the EtherFast Model No.: BEFCMU10 BenefitsBenefits Linksys. It’s the easiest and most® Cableaffordable Modem way with to harness USB from the full potential of the Internet. • Easy Installation - One Phone Call Completes FeaturesFeatures Setup • Built-In 10/100 Ethernet Port • Much Faster Download and Upload Than Dial- Up Internet Connections • With USB Connection, No Ethernet Card is Required • Keeps the Telephone Line Free for Calls While • Up to 42.88 Mbps -
BANDWIDTH UTILIZATION on CABLE-BASED HIGH SPEED DATA NETWORKS Terry D
BANDWIDTH UTILIZATION ON CABLE-BASED HIGH SPEED DATA NETWORKS Terry D. Shaw, Ph. D.1 CableLabs Abstract These observations indicate the The CableLabs Bandwidth Modeling and importance of deploying DOCSIS 1.1 in Management project addresses the use, order to meet this increasing demand for management, performance simulation, and upstream capacity. Preliminary simulation network economics of cable high-speed data results indicate DOCSIS 1.1 will enable a systems. On this project, we have analyzed significant increase in upstream system consumer usage patterns based upon data carrying capacity over the already collected on live cable-based high-speed substantial capacity of DOCSIS 1.0. These data systems as well as network simulations. simulations indicate that DOCSIS 1.1 will allow almost 20% more upstream capacity Usage data on live cable networks than DOCSIS 1.0. indicate that traffic flows are fairly predictable over DOCSIS™ networks. Simulations have also been used to study Some of the primary patterns emerging the characteristics of specific types of traffic include: found on cable networks. For example, simulations of peer-to-peer applications • Skewed distribution of bandwidth indicate that one user without rate limits can consumption. As a general rule in consume up to 25% of upstream capacity many systems, 30% of the with a usage pattern resembling a very high- subscribers consume about 60% of speed constant bit-rate application. These the data. simulation results highlight the potential • Students drive seasonal benefits for cable operators to manage their characteristics. System usage is bandwidth using tools such as rate limits, appreciably higher during local service tiers, and byte caps on usage. -
How Cable Modems Work by Curt Franklin for Millions of People, Television Brings News, Entertainment and Educational Programs Into Their Homes
How Cable Modems Work by Curt Franklin For millions of people, television brings news, entertainment and educational programs into their homes. Many people get their TV signal from cable television (CATV) because cable TV provides a clearer picture and more channels. See How Cable TV Works for details. Many people who have cable TV can now get a high-speed connection to the Internet from their cable provider. Cable modems compete with technologies like asymmetrical digital subscriber lines (ADSL). If you have ever wondered what the differences between DSL and cable modems are, or if you have ever wondered how a computer network can share a cable with dozens of television channels, then read on. In this article, we'll look at how a cable modem works and see how 100 cable television channels and any Web site out there can flow over a single coaxial cable into your home. Photo courtesy Motorola, Inc. Motorola SB5100E SURFboard Extra Space Cable Modem You might think that a television channel would take up quite a bit of electrical "space," or bandwidth, on a cable. In reality, each television signal is given a 6-megahertz (MHz, millions of cycles per second) channel on the cable. The coaxial cable used to carry cable television can carry hundreds of megahertz of signals -- all the channels you could want to watch and more. (For more information, see How Television Works.) In a cable TV system, signals from the various channels are each given a 6-MHz slice of the cable's available bandwidth and then sent down the cable to your house.