The Evolution of the U.S. Telecommunications Infrastructure Over the Next Decade

Size: px
Start display at page:

Download "The Evolution of the U.S. Telecommunications Infrastructure Over the Next Decade"

Transcription

1 The Evolution of the U.S. Telecommunications Infrastructure Over the Next Decade BROAD BANDWIDTH THROUGH DSL TTG4: McAdams, Cioffi, Bloom, Hargadon Digital Subscriber Line (DSL) telecommunication service is delivered through modems 1 over standard copper, twisted-pair telephone wires. As of midyear 1999, the bandwidth usually supplied through ADSL (asymmetric digital subscriber line) was 1.5 Mbps from the central office (CO) to the customer and 640 kbps from the customer to the CO. Service at this speed is available as long as the length of the copper wire does not exceed approximately 18,000 linear feet. ADSL, when used for high-speed connectivity for an individual customer's premises, can simultaneously be used for POTS (plain old telephone service) connectivity to the CO over the same copper pair. Most ILECs (Incumbent Local Exchange Carriers) and CLECs (Competitive Local Exchange Carriers) offer DSL service to customers, the latter through co-location with the former's CO facilities. A general depiction of the DSL architecture is shown in Figure 1. DSL technology is available in several configurations symmetric and asymmetric, downstream bandwidth from 64 kbps to 52 Mbps, upstream bandwidth from 64 kbps to 6 Mbps, and with or without voice circuits. The term xdsl is usually employed to denote any of the technologies in the DSL category this includes ADSL (Asymmetric DSL), SDSL (Symmetric DSL), HDSL (High speed DSL), IDSL (ISDN DSL), and VDSL (Very high speed DSL). 1 A DSL modem is an all-digital device, as contrasted with the widely available and inexpensive analog dialup modem. The analog modem translates the computer s digital signals into voice-band audio tones which can be carried on a switched telephone network. By contrast, a digital modem establishes a permanent digital circuit between the home and the central office; over this circuit, any combination of communication services may be employed, as long as they do not exceed the modem s bandwidth limit; devices external to the DSL circuit are required to convert analog signals (such as voice or video) to and from the DSL s digital signals. LaymanDSL.doc 1

2 Figure 1: Generalized DSL Architecture 2 The precise data rate which can be delivered by any DSL circuit depends on the length of the copper telephone wire between the customer and a network terminating unit (NTU). The NTU may be located at the local telephone company s CO or at a remote electronics site. (In Figure 1, the DSLAM acts as the NTU.) The copper telephone wire is usually the standard, copper, twisted pair telephone lines, 26 AWG at termination, without special conditioning or electronics. Three very important characteristics of DSL technology are: 1. For most DSL services, the user may retain full POTS connectivity, usually at no additional fee, and, as with POTS generally, functionality is retained even in a power outage; this is particularly the case with the DSL.Lite 3 technology, which has been designed as a residential consumer service; Pacific Bell, 1997 Also called G-Lite The original DSL.Lite specification called for implementation at the residence without a splitter (bandpass filter) between the voice and data circuits. This would have been easy to install, but would have removed a voice channel and given little back in return. Although DSL.Lite is not as popular in 1999 among the LECs as other DSL solutions, the DSL.Lite development work did yield microfilter technology which has proven useful to other DSL approaches in minimizing certain types of noise problems at the customer s location. LaymanDSL.doc 2

3 2. The user is provided with sole access to the DSL circuit; and 3. Experts estimate that some version of asymmetric 1.5 Mbps service, including a voice channel, in a robust and consumer-installable configuration, could be installed in COs serving approximately 70 percent of the US population as of the year The significance of (2) is that the full bandwidth of a DSL line is available to the user at all times. There is no contention among users for this line; it is not a "party line." These facts also have security implications, since it is unlikely that, other things being equal, one will inadvertently receive a message intended for one's neighbor, and the only file sharing actively supported is by the devices attached to the modems at each end. The circuit between the modems is a modulated carrier, and thus subject to unauthorized interception, as are all modulated signals; however, the modulation and signaling patterns are reasonably complex and of moderate amplitude, and the wire itself is usually buried, in conduit, or high on utility poles, rendering the circuit reasonably secure from tampering and unauthorized entry. Additional security precautions may be taken, if desired, at the NTU, the customer premises equipment (e.g., by the use of a firewall), and/or the DSLAM at the CO. Most DSL is sold by manufacturers to LECs, and is not generally available as a technology for direct purchase by consumers or businesses. Because the DSL service usually employs copper pairs which are pre-existing in the LEC s Distribution Network and on the customer s premises, existing Operations Support Systems (OSS) are usually adequate to enable the telecommunications service provider to set up the circuit and activate the account in a matter of a few minutes to an hour. Many of the existing DSL installations are capable of providing service at 6 Mbps downstream with significant upstream bandwidth. The modem equipment currently provided for the 1.5 Mbps service is capable of supporting data speeds up to 8 Mbps. By the year 2010, it is expected that 6 Mbps symmetric service will be readily available through DSL. This higherspeed service is possible today only over much shorter distances than the 1.5 Mbps service generally offered by ILECs and CLECs. As noted above, the furthest practical distance from customer to NTU using existing technology is about 18,000 feet of wire. The potentially available asymmetric downstream capacity is inversely related to the distance; e.g., 1.5 Mbps LaymanDSL.doc 3

4 downstream at 18,000 feet, 26 Mbps at 3,000 feet, or 52 Mbps at 1,000 feet. 5 (Although the performance curve is continuous, the available data rates are generally not, because equipment is available from the vendor community only at specific data rates.) A majority of the customers with access directly from the CO will probably be 7,000 cable-feet or more away from the NTU and thus will have a maximum of 8 Mbps downstream capacity. A very high percentage of American businesses are within 10,000 cable-feet of a CO, and thus may have access to DSL circuits with bandwidth of 8 Mbps or greater. In order to extend the availability of DSL service to customers, many LECs have begun to build DSL circuits using fiber Feeder Network and digital loop carrier circuits from the CO, and placing Figure 2: Typical application of digital loop fiber to support DSL at long distances from the CO RESIDENCE Phone Distance could be up to 25,000 feet, though optimally (for DSL) less than about 5,000 feet Fiber cable from CO to the O/E CENTRAL OFFICE Main Distributing Frame Splitter Network Termination Fiber Mux and O/E Fiber Mux and O/E DSLAM Modem ISP/CLEC Network PC Metallic cable from O/E to the home; Fiber Node and NTU probably located to serve one or a few neighborhoods; this will minimize the length of the metallic cable and make it possible to maximize the DSL bandwidth Distance could be several miles, though typically less than 30,000 feet 5 These distances are approximate, and will vary due to actual field conditions, presence of bridge tap, splices, age of the plant, construction quality, local weather, inter alia. LaymanDSL.doc 4

5 the fiber node and NTU at locations that are close enough to the customer s premises to permit higher-bandwidth DSL circuits over the last few hundred or few thousand feet of copper wire. Figure 2 shows one approach to such an installation. Cross-Talk: A Threat to DSL The potential cross-talk problem that exists for DSL has not been significant for ADSL. The picture changes radically as the bandwidth supplied to the user is increased. The likelihood of cross-talk in the presence of multiple users at even the 6 Mbps rate is more than proportionally greater. This is one of the reasons why higher speed services had not been widely installed by many LECs by the end of As noted above, for service deployments of increasing bandwidth, fiber to the remote distribution point (i.e., the NTU) may be introduced into circuits which are increasingly-close to the CO. The effect is to increase the bandwidth available to the customer without having to rebuild the plant that enters the customer s premises; that is, the entry facility remains narrowgauge copper wire. The likelihood of cross-talk is substantially reduced for and by installations attached to such fiber distribution points. When a fiber connection-point is deployed, a single strand of fiber each way, to-and-from the node replaces what potentially would have been several thousand return-copper lines attached to this remote node. Implications of Higher Bandwidth Services Some urban areas in America, have much shorter local loop lengths than the US average, and thus the capacity to deliver VDSL (within 3,000 feet) directly from the CO. This is also true for newer communities in the US with both suburban new-builds and urban redevelopment areas. These latter tend to be built either close to a major CO or with new wire and cable technology, either of which will make it easier for customers to receive DSL service in excess of 1.5 Mbps. Overseas, countries and companies have different development patterns. For example, Deutsche Telekom utilizes technology from Orckit and Fujitsu to provide VDSL to its customers who reside within 3,000 feet of a central office; this represents approximately 85 percent of DT s customer base. LaymanDSL.doc 5

6 In the US, the experience of US West suggests that DSL services in the range of 25 Mbps might be widely implemented throughout the country in comparable technical and market conditions. US West has also just announced dial-up ADSL to be widely available for as little as $19.95/mo. DSL implementations work best when they push fiber deep into the architecture (i.e., toward the customer) with much higher per-end-user capacity and many fewer technical problems with noise and cross-talk. It can be expected that by 2005 and beyond, fiber will be at the neighborhood level for all DSL technologies; it will certainly be within 3,000 feet, and probably less for many subscribers. Later in the decade, we expect to see substantial fiber penetration into the outside plant (cf., Figure 2, supra) in order to keep copper-wire based implementations within DSL s theoretical limits; i.e., up to 26 Mbps per line, symmetric, and within 1,000 feet. Recent Books REFERENCES Chen, W., DSL: Simulation Techniques and Standards Development for Digital Subscriber Line Systems, Macmillan Technology Series, Hecht, Howard, John Freeman, and Marlis Humphrey, DSL: ADSL, RADSL, SDSL, HDSL, and VDSL, McGraw-Hill, Starr, T., John M. Cioffi, and P. J. Silverman, Understanding Digital Subscriber Line Technology, Prentice Hall, Tutorials Cioffi, John M., Symmetric Digital Subscriber Lines, Chapter 34 in Communications Handbook, J. D. Gibson, Ed., CRC Press, Werner, J. J., The HDSL Environment, IEEE J. Select. Areas Comm., vol. 9, no. 8, Czajkowski, High-speed copper access: A tutorial overview, Elec. And Comm. Eng. J., vol. 11, no. 3, 1999, pp Web Resources: ADSL Forum: Find out what is going on in the industry. Download technical reports. Everythingdsl.com: Find more glossary and references here. TeleChoice: Leading industry analyst on DSL service and technology LaymanDSL.doc 6

Analysis of xdsl Technologies

Analysis of xdsl Technologies International Journal of Electronics and Computer Science Engineering 897 Available Online at www.ijecse.org ISSN- 2277-1956 Analysis of xdsl Technologies Dimple Saproo 1, Megha Goyal 2, Asha Bhagashra

More information

Intel System Engineers Documents. DSL General Overview

Intel System Engineers Documents. DSL General Overview Intel System Engineers Documents DSL General Overview Alex Lattanzi SC LAR Whatt IIs Brroadband? Broadband describes a number of different technologies that deliver digital data to homes and businesses

More information

Broadband 101: Installation and Testing

Broadband 101: Installation and Testing Broadband 101: Installation and Testing Fanny Mlinarsky Introduction Today the Internet is an information superhighway with bottlenecks at every exit. These congested exits call for the deployment of broadband

More information

The Evolution of the U.S. Telecommunications Infrastructure Over the Next Decade

The Evolution of the U.S. Telecommunications Infrastructure Over the Next Decade The Evolution of the U.S. Telecommunications Infrastructure Over the Next Decade BROAD BANDWIDTH THROUGH DSL Technology Task Group (TTG-4) Reporter: McAdams (akm3@cornell.edu) Members: CIOFFI, TONG, TERRY,

More information

VDSL (VERY HIGH DATA BIT RATE DIGITAL SUBSCRIBER LINE)

VDSL (VERY HIGH DATA BIT RATE DIGITAL SUBSCRIBER LINE) 1 VDSL (VERY HIGH DATA BIT RATE DIGITAL SUBSCRIBER LINE) INTRODUCTION 1. Recent events in the telecommunications environment are giving rise to a new class of service providers, setting the stage for how

More information

Cable subscribers are connected directly to high speed lines while ADSL subscribers are connected directly to medium speed lines

Cable subscribers are connected directly to high speed lines while ADSL subscribers are connected directly to medium speed lines ADSL vs Cable Cable subscribers are connected directly to high speed lines while ADSL subscribers are connected directly to medium speed lines Cable subscribers share the line connecting them to neighbourhood

More information

XDSL and DSLAM Access Technologies

XDSL and DSLAM Access Technologies XDSL and DSLAM Access Technologies Abstract What are the differences between the different forms of xdsl technology, such as ADSL and HDSL? How are they implemented. What are the limitations? What are

More information

Evolution from Voiceband to Broadband Internet Access

Evolution from Voiceband to Broadband Internet Access Evolution from Voiceband to Broadband Internet Access Murtaza Ali DSPS R&D Center Texas Instruments Abstract With the growth of Internet, demand for high bit rate Internet access is growing. Even though

More information

Table 1: Comparison of different types of DSL Technologies

Table 1: Comparison of different types of DSL Technologies Table 1: Comparison of different types of DSL Technologies DSL Type Symmetric/Asymmetric Loop Range (kft) Downstream (Mbps) Upstream (Mbps) IDSL symmetric 18 0.128 0.128 SDSL symmetric 10 1.544 1.544 HDSL

More information

TELECOMMUNICATIONS STANDARDS ADVISORY COMMITTEE TSAC WORKING GROUP ON NEW STANDARDS AND POLICY (NSP)

TELECOMMUNICATIONS STANDARDS ADVISORY COMMITTEE TSAC WORKING GROUP ON NEW STANDARDS AND POLICY (NSP) TELECOMMUNICATIONS STANDARDS ADVISORY COMMITTEE TSAC WORKING GROUP ON NEW STANDARDS AND POLICY (NSP) Introduction Development of Digital Subscriber Line (DSL) Technology This paper introduces the development

More information

Chapter 9 Using Telephone and Cable Networks for Data Transmission

Chapter 9 Using Telephone and Cable Networks for Data Transmission 9-11 TELEPHONE NETWORK Chapter 9 Using Telephone and Cable Networks for Data Transmission 1 McGraw-Hill Copyright The McGraw-Hill Companies, Inc. Permission required The for reproduction McGraw-Hill or

More information

ADSL over ISDN, DAML, and Long Loops

ADSL over ISDN, DAML, and Long Loops Avi Vaidya Vice President and Chief Technology Officer Charles Industries, Ltd. over ISDN, DAML, and Long Loops As new technologies evolve, new challenges arise for telephone companies. Some of these challenges

More information

(Refer Slide Time: 2:10)

(Refer Slide Time: 2:10) Data Communications Prof. A. Pal Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture-12 Multiplexer Applications-1 Hello and welcome to today s lecture on multiplexer

More information

Exam questions. 1. Which of the following are true regarding xdsl? Choose three. It uses a portion of the existing phone line.

Exam questions. 1. Which of the following are true regarding xdsl? Choose three. It uses a portion of the existing phone line. Nguyen Khac Quyet - Take Exam Exam questions Time remaining: 00: 08: 31 1. Which of the following are true regarding xdsl? Choose three. It uses a portion of the existing phone line It is symmetrical It

More information

DSL Variations. NEXTEP Broadband White Paper. Broadband Networks Group. Definitions and differences of Digital Subscriber Line variations.

DSL Variations. NEXTEP Broadband White Paper. Broadband Networks Group. Definitions and differences of Digital Subscriber Line variations. NEXTEP Broadband White Paper DSL Variations Definitions and differences of Digital Subscriber Line variations. A NEXTEP Broadband White Paper May 2001 Broadband Networks Group DSL Variations EXECUTIVE

More information

Technical Paper. Digital Subscriber Line (DSL): Using Next Generation Technologies to Expand Traditional Infrastructures

Technical Paper. Digital Subscriber Line (DSL): Using Next Generation Technologies to Expand Traditional Infrastructures Technical Paper Digital Subscriber Line (DSL): Using Next Generation Technologies to Expand Traditional Infrastructures USB ADSL Modem Contents Digital Subscriber Line (DSL): Using Next Generation Technologies

More information

Connection Services. Hakim S. ADICHE, MSc

Connection Services. Hakim S. ADICHE, MSc Connection Services Hakim S. ADICHE, MSc adiche@ccse.kfupm.edu.sa Department of Computer Engineering King Fahd University of Petroleum and Minerals Dhahran, Saudi Arabia Connection Services Different connectivity

More information

How DSL Works. by Curt Franklin

How DSL Works. by Curt Franklin by Curt Franklin How DSL Works When you connect to the Internet, you might connect through a regular modem, through a localarea network connection in your office, through a cable modem or through a digital

More information

Nexus Technology Review -- Exhibit A

Nexus Technology Review -- Exhibit A Nexus Technology Review -- Exhibit A Background A. Types of DSL Lines DSL comes in many flavors: ADSL, ADSL2, ADSL2+, VDSL and VDSL2. Each DSL variant respectively operates up a higher frequency level.

More information

DSL - Digital Subscriber Line Installation, Maintenance & Troubleshooting

DSL - Digital Subscriber Line Installation, Maintenance & Troubleshooting Hands-On DSL - Digital Subscriber Line Installation, Maintenance & Troubleshooting including: CAT5 & CAT6 Preparation, Installation & Testing BICSI CECs This course has been approved for CEC credits by

More information

T1 Networking Made Easy

T1 Networking Made Easy T1 Networking Made Easy 1 THE T1 CARRIER 3 WHAT DOES A T1 LOOK LIKE? 3 T1 BANDWIDTH 3 T1 PHYSICAL CHARACTERISTICS 4 T1 FRAMING 5 LINE CODE 6 T1 NETWORKING 6 TELCOS 6 PSTN ACCESS WITH A T1 8 SUMMARY OF

More information

INTRODUCTION TO DSL CHAPTER 1 1.1 THE TELEPHONE LOOP PLANT. 1.1 The Telephone Loop Plant. 1.2 DSL Reference Model. 1.3 The Family of DSL Technologies

INTRODUCTION TO DSL CHAPTER 1 1.1 THE TELEPHONE LOOP PLANT. 1.1 The Telephone Loop Plant. 1.2 DSL Reference Model. 1.3 The Family of DSL Technologies CHAPTER 1 INTRODUCTION TO DSL 1.1 The Telephone Loop Plant 1.2 DSL Reference Model 1.3 The Family of DSL Technologies 1.4 DSL Protocol Reference Model Digital subscriber line (DSL) technology transforms

More information

TELECOMMUNICATIONS STANDARDS ADVISORY COMMITTEE WORKING GROUP ON COMMON CONNECTION STANDARDS (CCS)

TELECOMMUNICATIONS STANDARDS ADVISORY COMMITTEE WORKING GROUP ON COMMON CONNECTION STANDARDS (CCS) TELECOMMUNICATIONS STANDARDS ADVISORY COMMITTEE WORKING GROUP ON COMMON CONNECTION STANDARDS (CCS) Overview of Very High Speed Digital Subscriber Line 2 (VDSL2) 甚 高 速 數 碼 用 戶 線 路 2 的 概 覽 Introduction ADSL

More information

Public Network. 1. Relatively long physical distance 2. Requiring a service provider (carrier) Branch Office. Home. Private Network.

Public Network. 1. Relatively long physical distance 2. Requiring a service provider (carrier) Branch Office. Home. Private Network. Introduction to LAN TDC 363 Week 4 Connecting LAN to WAN Book: Chapter 7 1 Outline Wide Area Network (WAN): definition WAN Topologies Choices of WAN technologies Dial-up ISDN T1 Frame Relay DSL Remote

More information

ECE 510 -- Chapter 1

ECE 510 -- Chapter 1 ECE 510 -- Chapter 1 Definition: Digital Subscriber Line (DSL) Public network technology that delivers high bandwidth over conventional copper wiring at limited distances. There are four major types of

More information

DSL: An Overview. By M. V. Ramana Murthy. All Rights Reserved

DSL: An Overview. By M. V. Ramana Murthy. All Rights Reserved By M. V. Ramana Murthy All Rights Reserved COPYRIGHT: This document is a property of MultiTech Software Systems India Pvt. Ltd. No part of this document may be copied or reproduced in any form or by any

More information

Black Box Explains: DSL

Black Box Explains: DSL Black Box Explains: DSL History It was realized as early as the late eighties, early nineties, that conventional data transmission systems did not meet the requirements of the growing internet community

More information

Telecommunications systems (Part 2)

Telecommunications systems (Part 2) School of Business Eastern Illinois University Telecommunications systems (Part 2) Abdou Illia, Spring 2007 (Week 12, Thursday 3/29/2007) T-1 Digital Subscriber Line (DSL) Cellular Telephone System Integrated

More information

EarthLink High Speed Business DSL User Guide

EarthLink High Speed Business DSL User Guide EarthLink High Speed Business DSL User Guide TABLE OF CONTENTS: Welcome..............................................................1 Features & Benefits of Business DSL........................................2

More information

Application Of Build-in Self Test In Functional Test Of DSL

Application Of Build-in Self Test In Functional Test Of DSL Application Of Build-in Self Test In Functional Test Of DSL YaJun Gu, Ye Qin, ZhiJun Wang, David Wei, Andrew Ho, Stephen Chen, Zhen (Jane) Feng Ph. D., Murad Kurwa No.77 Yong Sheng Road, Malu, Jiading,

More information

Network+ Guide to Networks 6 th Edition. Chapter 7 Wide Area Networks

Network+ Guide to Networks 6 th Edition. Chapter 7 Wide Area Networks Network+ Guide to Networks 6 th Edition Chapter 7 Wide Area Networks Objectives Identify a variety of uses for WANs Explain different WAN topologies, including their advantages and disadvantages Compare

More information

Getting Broadband. FCC Consumer Facts. What Is Broadband?

Getting Broadband. FCC Consumer Facts. What Is Broadband? Getting Broadband FCC Consumer Facts What Is Broadband? Broadband or high-speed Internet access allows users to access the Internet and Internetrelated services at significantly higher speeds than those

More information

1.264 Lecture 34. Telecom: Connecting wired LAN, WAN. Next class: Green chapter 17. Exercise due before class

1.264 Lecture 34. Telecom: Connecting wired LAN, WAN. Next class: Green chapter 17. Exercise due before class 1.264 Lecture 34 Telecom: Connecting wired LAN, WAN Next class: Green chapter 17. Exercise due before class 1 Exercise Your transportation brokerage company also handles billing for freight shipments,

More information

Telecommunications systems (Part 1)

Telecommunications systems (Part 1) School of Business Eastern Illinois University Telecommunications systems (Part 1) (Week 11, Thursday 11/02/2006) Abdou Illia, Fall 2006 Learning Objectives 2 Describe and compare types of connection to

More information

Digital Subscriber Line (DSL)

Digital Subscriber Line (DSL) CHAPTER 9 This chapter describes the level of support that Cisco ANA provides for DSL, as follows: Technology Description, page 9-1 Inventory and Information Model Objects (IMOs), page 9-2 Vendor-Specific

More information

ADSL or Asymmetric Digital Subscriber Line. Backbone. Bandwidth. Bit. Bits Per Second or bps

ADSL or Asymmetric Digital Subscriber Line. Backbone. Bandwidth. Bit. Bits Per Second or bps ADSL or Asymmetric Digital Subscriber Line Backbone Bandwidth Bit Commonly called DSL. Technology and equipment that allow high-speed communication across standard copper telephone wires. This can include

More information

Residential Broadband: Technologies for High-Speed Access To Homes

Residential Broadband: Technologies for High-Speed Access To Homes Residential Broadband: Technologies for High-Speed Access To Homes The Ohio State University Columbus, OH 43210-1277 1277 http://www.cse.ohio-state.edu/~jain/ 1 Overview 56 kbps Modems, ISDN ADSL, VDSL

More information

TR-013 Interfaces and System Configuration for ADSL Central Office Issue: 1.0 Issue Date: January 1999

TR-013 Interfaces and System Configuration for ADSL Central Office Issue: 1.0 Issue Date: January 1999 TECHNICAL REPORT Interfaces and System Configuration for ADSL Central Office Issue: 1.0 Issue Date: January 1999 The Broadband Forum. All rights reserved. Notice The Broadband Forum is a non-profit corporation

More information

Introduction to Digital Subscriber Line Technology

Introduction to Digital Subscriber Line Technology An Overview of Digital Subscriber Line Technology Technology basics, DSL equipment, types of DSL, comparison with cable, use by customers and ehealth support Introduction to Digital Subscriber Line Technology

More information

INTERNET CONNECTIVITY

INTERNET CONNECTIVITY INTERNET CONNECTIVITY http://www.tutorialspoint.com/internet_technologies/internet_connectivity.htm Copyright tutorialspoint.com Here in this tutorial, we will discuss how to connect to internet i.e. internet

More information

Technology Brief. Implementing DSL Service for ISPs with the SMS. The DSL Opportunity. DSL is Different from Dial

Technology Brief. Implementing DSL Service for ISPs with the SMS. The DSL Opportunity. DSL is Different from Dial Technology Brief Implementing DSL Service for ISPs with the SMS The DSL Opportunity Digital Subscriber Line (DSL) services represent a major opportunity for dialup-based Internet Service Providers (ISPs)

More information

Introduction to ADSL. NEXTEP Broadband White Paper. Broadband Networks Group. A primer on Asymmetric Digital Subscriber Line transmission technology.

Introduction to ADSL. NEXTEP Broadband White Paper. Broadband Networks Group. A primer on Asymmetric Digital Subscriber Line transmission technology. NEXTEP Broadband White Paper Introduction to ADSL A primer on Asymmetric Digital Subscriber Line transmission technology. A NEXTEP Broadband White Paper May 2001 Broadband Networks Group Introduction to

More information

Appendix A: Basic network architecture

Appendix A: Basic network architecture Appendix A: Basic network architecture TELECOMMUNICATIONS LOCAL ACCESS NETWORKS Traditionally, telecommunications networks are classified as either fixed or mobile, based on the degree of mobility afforded

More information

Residential Broadband: Technologies for High-Speed Access To Homes

Residential Broadband: Technologies for High-Speed Access To Homes Residential Broadband: Technologies for High-Speed Access To Homes Columbus, OH 43210 Jain@CIS.Ohio-State.Edu http://www.cis.ohio-state.edu/~jain/cis788-97/ Email questions to mbone@netlab.ohio-state.edu

More information

HIGH CAPACITY DSL-SYSTEMS

HIGH CAPACITY DSL-SYSTEMS Electronic Communications Committee (ECC) within the European Conference of Postal and Telecommunications Administrations (CEPT) HIGH CAPACITY DSL-SYSTEMS Oulu, March 2006 Page 2 EXECUTIVE SUMMARY In this

More information

Overview of WAN Connections Module 1

Overview of WAN Connections Module 1 Overview of WAN Connections Module 1 Objectives This module introduces the basic elements of WAN connections and describes the role each element plays in creating that connection. After completing this

More information

Narrowband and Broadband Access Technologies

Narrowband and Broadband Access Technologies Computer Networks and Internets, 5e Chapters 12 and 16 Access and Interconnection Technologies (slidesets abridged/combined) By Douglas Comer Modified from the lecture slides of Lami Kaya (LKaya@ieee.org)

More information

Network Neutrality Statement

Network Neutrality Statement Network Neutrality Statement CTC continues to comply with all applicable FCC requirements while providing the best possible customer experience for its Internet users. As such, CTC commits to the open

More information

WHITE PAPER December, 2001

WHITE PAPER December, 2001 Is Superior Essex Outside Plant Copper Cable Rated Category 3? The applicability of the Category 3 specification to outside plant cables is sometimes misunderstood. This white paper examines that issue,

More information

Chapter 1. Introduction. 1.1 Research Motivation and Objective

Chapter 1. Introduction. 1.1 Research Motivation and Objective Chapter 1 Introduction 1.1 Research Motivation and Objective With the recent rapid growth of high-speed Digital Subscriber Line (DSL) access subscriptions, there is a high demand in the telecommunication

More information

Digital Subscriber Line

Digital Subscriber Line 21 CHAPTER 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

More information

DSL and Cable Modem Networks

DSL and Cable Modem Networks Presented by: C H A P T E R 7 DSL and Cable Modem Networks DSL and cable modem network access are two alternative ways to connect to a network service provider without the use of more expensive dedicated

More information

Current access technologies overview

Current access technologies overview White Paper Current access technologies overview In this paper, we explore six basic technology choices for deploying broadband services to the end customer xdsl, DOCSIS, G.fast, satellite, wireless and

More information

Enhanced xdsl solutions Deploy faster and lower your costs

Enhanced xdsl solutions Deploy faster and lower your costs Enhanced xdsl solutions Deploy faster and lower your costs Extending the performance of your copper infrastructure Digital Subscriber Line (DSL) technologies use sophisticated modulation schemes to bring

More information

5.3.1.9 Digital Subscriber Line (DSL) Requirements

5.3.1.9 Digital Subscriber Line (DSL) Requirements UCR 2008, Change 2, Modification #2 provides (DSL) requirements. Section 5.3.1 was modified to reflect this change. Corrections to UCR 2008, Change 2, made by Modification # 2 SECTION NEW Requirements

More information

Dwindling DSL services give rise to new options

Dwindling DSL services give rise to new options Charter Business : White paper Dwindling DSL services give rise to new options WHITE PAPER There is no question a company s high-speed data connection has become a business lifeline in the Internet age,

More information

Chapter 9A. Network Definition. The Uses of a Network. Network Basics

Chapter 9A. Network Definition. The Uses of a Network. Network Basics Chapter 9A Network Basics 1 Network Definition Set of technologies that connects computers Allows communication and collaboration between users 2 The Uses of a Network Simultaneous access to data Data

More information

Wireless SDSL for the Business Sector

Wireless SDSL for the Business Sector Wireless SDSL for the Business Sector Broadband Services over BreezeACCESS VL June 2005 Alvarion Ltd. All rights reserved. The material contained herein is proprietary. No part of this publication may

More information

www.zte.com.cn VDSL2 A feasible Solution for Last Mile

www.zte.com.cn VDSL2 A feasible Solution for Last Mile www.zte.com.cn VDSL2 A feasible Solution for Last Mile Version Date Author Approved By Remarks V1.00 009-08-8 MichaelSong Not open to the Third Party 009 ZTE Corporation. All rights reserved. ZTE CONFIDENTIAL:

More information

EFM Copper (EFMC) Tutorial. June 2004

EFM Copper (EFMC) Tutorial. June 2004 EFM Copper (EFMC) Tutorial June 2004 2004 Ethernet in the First Mile Alliance. All Rights Reserved. 1 EFM Copper (EFMC) Tutorial INTRODUCTION... 2 EFMC: BASED ON DSL... 3 BACKGROUND ON DSL... 3 DSL ENHANCEMENTS

More information

How Enhanced DSL Technologies Optimize the Last Copper Mile By John Williams

How Enhanced DSL Technologies Optimize the Last Copper Mile By John Williams White Paper How Enhanced DSL Technologies Optimize the Last Copper Mile By John Williams As broadband speeds increase to support the connected home, a debate continues over which type of network architecture

More information

Wireless Links - Wireless communication relies on radio signals or infrared signals for transmitting data.

Wireless Links - Wireless communication relies on radio signals or infrared signals for transmitting data. Uses of a network A network is a way to connect computers so that they can communicate, exchange information and share resources in real time. Networks enable multiple users to access shared data and programs

More information

Objectives. Remote Connection Options. Teleworking. Connecting Teleworkers to the Corporate WAN. Providing Teleworker Services

Objectives. Remote Connection Options. Teleworking. Connecting Teleworkers to the Corporate WAN. Providing Teleworker Services ITE I Chapter 6 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 1 Objectives Providing Teleworker Services Describe the enterprise requirements for providing teleworker services Explain how

More information

Voice and Delivery Data Networks

Voice and Delivery Data Networks Voice and Delivery Data Networks Chapter 11 Learning Objectives After reading this chapter, you should be able to: Identify the basic elements of a telephone system Describe the composition of the telephone

More information

xdsl Tutorial By Brandon Provolt Engineering Intern Marketing and Product Development Group Schott Corporation Version 0.53 (beta) August 2000

xdsl Tutorial By Brandon Provolt Engineering Intern Marketing and Product Development Group Schott Corporation Version 0.53 (beta) August 2000 xdsl Tutorial By Brandon Provolt Engineering Intern Marketing and Product Development Group Schott Corporation Version 0.53 (beta) August 2000 Contents 1 General Information 1.1 Introduction 1.2 What is

More information

Dwindling DSL services give rise to new options

Dwindling DSL services give rise to new options Charter Business : White paper Dwindling DSL services give rise to new options WHITE PAPER There is no question a company s high-speed data connection has become a business lifeline in the Internet age,

More information

6.0Mb Max Digital DSL/ 56K Modem (G.DMT/G.Lite/V.90)

6.0Mb Max Digital DSL/ 56K Modem (G.DMT/G.Lite/V.90) 6.0Mb Max Digital DSL/ 56K Modem (G.DMT/G.Lite/V.90) Technology Description: Compaq's 6.0 Mb Max Digital DSL/ 56K Modem (G.DMT/G.Lite/V.90) builds on Compaq's commitment to provide the latest communications

More information

Orion2+ SHDSL.bis Solution with 11Mbit/s and 15Mbit/s per Copper Pair

Orion2+ SHDSL.bis Solution with 11Mbit/s and 15Mbit/s per Copper Pair Orion2+ SHDSL.bis Solution with 11Mbit/s and 15Mbit/s per Copper Pair Good to Know about Orion s Orion1 and Orion2 Modems from FlexDSL have always some more features than corresponding products from competitors.

More information

What are the Requirements for an Accurate DSL Line Simulator? Paradyne International, France

What are the Requirements for an Accurate DSL Line Simulator? Paradyne International, France Title: Source: Author: Contact: What are the Requirements for an Accurate DSL Line Simulator? Paradyne International, France Jack Douglass Jack Douglass Paradyne Networks, Inc. Voice: 949-233-3558 Email:

More information

ADSL BROADBAND BASICS FOR THE DOMESTIC USER. The Main Limitations of ADSL Broadband are as follows.

ADSL BROADBAND BASICS FOR THE DOMESTIC USER. The Main Limitations of ADSL Broadband are as follows. ADSL BROADBAND BASICS FOR THE DOMESTIC USER AS NOTHING MAN MADE IS PERFECT, ADSL IS NOT AN EXCEPTION. The Main Limitations of ADSL Broadband are as follows. 1. ADSL is not a Guaranteed Bandwidth Service.

More information

ASSESSING HIGH-SPEED INTERNET ACCESS IN THE STATE OF IOWA: SIXTH ASSESSMENT

ASSESSING HIGH-SPEED INTERNET ACCESS IN THE STATE OF IOWA: SIXTH ASSESSMENT ASSESSING HIGH-SPEED INTERNET ACCESS IN THE STATE OF IOWA: SIXTH ASSESSMENT A Report of the Iowa Utilities Board Utilities Board: John Norris (Chairman) Krista K. Tanner Darrell Hanson IUB Project Manager

More information

Broadband Primer. A Guide to High Speed Internet Technologies. Indiana Office of Utility Consumer Counselor

Broadband Primer. A Guide to High Speed Internet Technologies. Indiana Office of Utility Consumer Counselor Broadband Primer A Guide to High Speed Internet Technologies Indiana Office of Utility Consumer Counselor 100 N. Senate Av., Room N501 Indianapolis, IN 46204-2215 www.openlines.in.gov toll-free: 1-888-441-2494

More information

Symmetric DSL White Paper. Abstract

Symmetric DSL White Paper. Abstract Symmetric DSL White Paper George H. Dobrowski, GlobespanVirata Soum Mukherjee, HyperEdge Jimmy Engstrom, Ericsson Sascha Lindecke, Infineon Andrew Nicholson, Nokia Barry Dropping, Symmetricom Abstract

More information

ITU-T xdsl Standards Study Group 15 Question 4

ITU-T xdsl Standards Study Group 15 Question 4 International Telecommunication Union ITU-T xdsl Standards Study Group 15 Question 4 Stephen Palm Ph.D. Principal Engineer Broadcom palm @ broadcom. com ITU-T Workshop All Star Network Access Geneva, 2-4

More information

Extending Asymmetric Digital Subscriber Line (ADSL) Services to Remote Digital Loop Carrier (DLC) Locations

Extending Asymmetric Digital Subscriber Line (ADSL) Services to Remote Digital Loop Carrier (DLC) Locations Extending Asymmetric Digital Subscriber Line (ADSL) Services to Remote Digital Loop Carrier (DLC) Locations Definition Digital loop carriers (DLCs) consolidate the voice traffic of remotely located customers

More information

DSL BOOK SOURCE THE. Plain Answers About Digital Subscriber Line Opportunities Winner of 1997 Excellence Award SECOND EDITION

DSL BOOK SOURCE THE. Plain Answers About Digital Subscriber Line Opportunities Winner of 1997 Excellence Award SECOND EDITION SECOND EDITION THE DSL SOURCE BOOK Plain Answers About Digital Subscriber Line Opportunities Winner of 1997 Excellence Award Society of Technical Communications (STC) Please contact us at: 800-PARADYNE

More information

E1-E2 (EB) Chapter 8A. Broadband Services

E1-E2 (EB) Chapter 8A. Broadband Services E1-E2 (EB) Chapter 8A Broadband Services 8A. Broadband and Broadband Services 8A.1 Introduction In toady s globally networked society through internet, there is always increasing demand for higher capacity

More information

Analysis Techniques for Loop Qualification and Spectrum Management

Analysis Techniques for Loop Qualification and Spectrum Management Analysis Techniques for Loop Qualification and Spectrum Management David L. Waring Stefano Galli Kenneth Kerpez John Lamb Craig F. Valenti Telcordia Technologies, Inc. Morristown, New Jersey +1 973 829-2000

More information

A Rural Telco Strategy for the Connect America Fund

A Rural Telco Strategy for the Connect America Fund A Rural Telco Strategy for the Connect America Fund Connect America Fund (CAF) is the FCC program to transition the purpose of the Universal Service Fund (USF) to subsidize broadband instead of POTS in

More information

Characterization of a new copper cable for next generation DSL systems

Characterization of a new copper cable for next generation DSL systems la The Tour Marine Tanguy, Drive,, Brest Mumbai. (FR). Characterization of a new copper cable for next generation DSL systems Project Co-ordinates ordinates Kalpesh PATEL TELECOM ParisTech Paris, France.

More information

Simulation Study on Internet Applications over DSL Access Network: KFUPM Campus as an Example

Simulation Study on Internet Applications over DSL Access Network: KFUPM Campus as an Example Simulation Study on Internet Applications over DSL Access Network: KFUPM Campus as an Example Uthman Baroudi, Saeed Bawazir and Wael Hamri Computer Engineering Department KFUPM, Dhahran Saudi Arabia Email:

More information

RADIO FREQUENCY INTERFERENCE AND CAPACITY REDUCTION IN DSL

RADIO FREQUENCY INTERFERENCE AND CAPACITY REDUCTION IN DSL RADIO FREQUENCY INTERFERENCE AND CAPACITY REDUCTION IN DSL Padmabala Venugopal, Michael J. Carter*, Scott A. Valcourt, InterOperability Laboratory, Technology Drive Suite, University of New Hampshire,

More information

Introduction to Digital Subscriber s Line (DSL)

Introduction to Digital Subscriber s Line (DSL) Introduction to Digital Subscriber s Line (DSL) Professor Fu Li, Ph.D., P.E. Chapter 3 DSL Fundementals BASIC CONCEPTS maximizes the transmission distance by use of modulation techniques but generally

More information

ADSL TUTORIAL. Figure 1: Typical DSL system.

ADSL TUTORIAL. Figure 1: Typical DSL system. ADSL TUTORIAL Matthew J. Langlois, University of New Hampshire InterOperability Laboratory 121 Technology Drive, Suite 2, Durham, NH 03824 USA. Extracted from the Introduction and Chapter 1 of A G.hs Handshaking

More information

BROADBAND DSL ACHIEVING HEALTHY GROWTH

BROADBAND DSL ACHIEVING HEALTHY GROWTH MEDEA+ News 28 October 2003 BROADBAND DSL ACHIEVING HEALTHY GROWTH There were more than 10 million new subscribers to broadband digital subscriber line (DSL) connections in the first half of 2003, according

More information

Telephone Systems. Home Telephones. Central Office. Local Loop. Wired Telephony

Telephone Systems. Home Telephones. Central Office. Local Loop. Wired Telephony Telephone Systems COMP476 Home Telephones Plain Old Telephone Service (POTS) provides a twisted pair connection from your phone to the central office. You own your home wiring and the telephone company

More information

Adaptive Spectrum and Signal Alignment, Incorporated THE RE-PROFILER DSM CLOSES THE CASE ON DIAGNOSING DSL/VDSL TROUBLES

Adaptive Spectrum and Signal Alignment, Incorporated THE RE-PROFILER DSM CLOSES THE CASE ON DIAGNOSING DSL/VDSL TROUBLES Adaptive Spectrum and Signal Alignment, Incorporated THE RE-PROFILER DSM CLOSES THE CASE ON DIAGNOSING DSL/VDSL TROUBLES PETER J. SILVERMAN - ASSIA INC. FIRST PUBLISHED IN OSP MAGAZINE, SEPTEMBER 2007

More information

COMMITTEE T1 TELECOMMUNICATIONS Working Group T1E1.4 (DSL Access) Costa Mesa, California, March 8 12, 1999

COMMITTEE T1 TELECOMMUNICATIONS Working Group T1E1.4 (DSL Access) Costa Mesa, California, March 8 12, 1999 COMMITTEE T1 TELECOMMUNICATIONS Working Group T1E1.4 (DSL Access) Costa Mesa, California, March 8 1, 1999 T1E1.4/99-16 CONTRIBUTION TITLE: SOURCE*: PROJECT: Proposal for an Improved Upstream FEXT Model

More information

Brief on xdsl interference

Brief on xdsl interference Brief on xdsl interference Prepared by C. Szabo - EUROCONTROL 1. Introduction The xdsl acronym includes the following Digital Subscriber Lines (DSL): - High Data-Rate Digital Subscriber Line (HDSL) - Single-Line

More information

Reducing Cost of Ownership in a DSL Access Network

Reducing Cost of Ownership in a DSL Access Network Reducing Cost of Ownership in a DSL Access Network A Market Insight from Net to Net Technologies Ltd EMEA V.0 Page of 8 Introduction The Internet access market is becoming a utility market. The Incumbent

More information

COMPUTERS ARE YOUR FUTURE CHAPTER 8 WIRED & WIRELESS COMMUNICATION

COMPUTERS ARE YOUR FUTURE CHAPTER 8 WIRED & WIRELESS COMMUNICATION COMPUTERS ARE YOUR FUTURE CHAPTER 8 WIRED & WIRELESS COMMUNICATION Answers to End-of-Chapter Questions Matching g 1. whiteboard i 2. sending device o 3. streaming j 4. WiFi m 5. Webcam d 6. data transfer

More information

ADSL part 2, Cable Internet, Cellular

ADSL part 2, Cable Internet, Cellular ADSL part 2, Cable Internet, Cellular 20 June 2016 Lecture 12 20 June 2016 SE 428: Advanced Computer Networks 1 Topics for Today ADSL Cable Internet Cellular Radio Networks 20 June 2016 SE 428: Advanced

More information

Broadband Technology Clinic. Burlington Telecom Advisory Board

Broadband Technology Clinic. Burlington Telecom Advisory Board Broadband Technology Clinic Burlington Telecom Advisory Board 1 What are the Defining Characteristics of a Broadband Service? Speed - Throughput capability both down and upstream Performance - Latency

More information

The Conversion Technology Experts. Media Conversion: Cost-Effectively Integrating T1 into your Fiber Network

The Conversion Technology Experts. Media Conversion: Cost-Effectively Integrating T1 into your Fiber Network The Conversion Technology Experts Media Conversion: Cost-Effectively Integrating T1 into your Fiber Network Media Conversion: Cost Effectively Integrating T1 into Your Fiber Network Revealing some simple

More information

Ethernet Passive Optical Networks EPON

Ethernet Passive Optical Networks EPON Ethernet Passive Optical Networks EPON IEEE 802.3 Ethernet in the First Mile Study Group January 8-9, 2001, Irvine, CA Gerry Pesavento Alloptic, Inc. Tel 925-245-7647 Email gerry.pesavento@alloptic.com

More information

CONSIDERATIONS FOR DSL DEPLOYMENT INITIATIVES The following checklist will help you in your DSL planning process:

CONSIDERATIONS FOR DSL DEPLOYMENT INITIATIVES The following checklist will help you in your DSL planning process: Chapter 8 SOURCEBOOK IN REVIEW IN CLOSING The Sourcebook identified the DSL deployment opportunities available today. DSL-based services, emerging business-class applications, requirements and benefits

More information

Economic Research & Analysis. CostQuest Associates (CQA) Bandwidth Assessment Tool Glossary of Terms: Words & Acronyms June 2014

Economic Research & Analysis. CostQuest Associates (CQA) Bandwidth Assessment Tool Glossary of Terms: Words & Acronyms June 2014 CostQuest Associates (CQA) Economic Research & Analysis Bandwidth Assessment Tool Glossary of Terms: Words & Acronyms June 2014 CostQuest Associates (CQA) Economic Research & Analysis For further information

More information

Live demo: AM_DSL. Session 5.5. VPI: Strategic Planning with VPIaccessMaker : Market Description, Forecasting, Clustering, Economic Analysis

Live demo: AM_DSL. Session 5.5. VPI: Strategic Planning with VPIaccessMaker : Market Description, Forecasting, Clustering, Economic Analysis SEMINAR ON NETWORK PLANNING STRATEGY FOR EVOLVING NETWORK ARCHITECTURES FOR ASIA PACIFIC REGION Session 5.5 VPI: Strategic Planning with VPIaccessMaker : Market Description, Forecasting, Clustering, Economic

More information

V-DSL technology in the NBN

V-DSL technology in the NBN CommsDay Melbourne Congress 2013 V-DSL technology in the NBN Wednesday 9 th October 2013 Cliff Gibson Outline VDSL2 technologies which extend the capability of existing copper are expected to be included

More information

Bandwidth Measurement in xdsl Networks

Bandwidth Measurement in xdsl Networks Bandwidth Measurement in xdsl Networks Liang Cheng and Ivan Marsic Center for Advanced Information Processing (CAIP) Rutgers The State University of New Jersey Piscataway, NJ 08854-8088, USA {chengl,marsic}@caip.rutgers.edu

More information