# Long Distance Communication: Modulation, Modems and Multiplexing

Save this PDF as:

Size: px
Start display at page:

Download "Long Distance Communication: Modulation, Modems and Multiplexing"

## Transcription

1 Long Distance Communication: Modulation, Modems and Multiplexing Gail Hopkins Introduction Sending signals over long distances Modulation and Modems Leased serial data circuits Optical, radio and dialup modems Multiplexing DSL and Cable modems 1

2 Signalling Across Long Distances Resistance in wires => signal loss => current cannot be propagated over long distances A continuous oscillating signal will propagate further than other signals Modulation Send an oscillating carrier wave and then modulate it in some way Technique originated with radio and TV (stations use different carrier frequencies) Transmitter generates carrier and modulates according to data, receiver discards carrier Two approaches from radio are frequency modulation (FM) and amplitude modulation (AM) 2

3 Amplitude Modulation (AM) Change amplitude of the carrier according to the data Frequency Modulation (FM) Slightly change frequency of the carrier according to the data 3

4 Phase Shift Keying (PSK) FM and AM require at least one wave cycle to send a bit Phase shift changes the timing of the carrier and can send several bits per cycle Phase Shift Modulation (2) Amount of phase shift can be measured How much of sine wave is "skipped" Example shows 1/4, 1/2 and 3/4 cycle Each phase shift can be used to carry more than one bit. For example: 00 - no shift 01-1/4 phase 10-1/2 phase 11-3/4 phase Thus, each phase shift carries 2 bits 4

5 Modems Hardware that takes bits and applies modulation is a modulator Hardware that takes a modulated wave and extracts bits is a demodulator Full duplex communication requires a combined modulator-demodulator (MODEM) at both ends Example modem connection 5

6 Leased Serial Data Circuits Long distance four wire circuits can be leased from a phone company (spare circuits are often included in trunk cables for expansion purposes) Often called a serial line or serial data circuit Optical, Radio and Dialup Modems Modems also used with optical fibre, radio and conventional phone connections Dial-up modems work with the existing phone system mimic telephones use a carrier that is an audible tone use a single voice channel (2 wire circuit) and co-ordinate to achieve full duplex communication 6

7 Dial-up Modem Configuration Multiplexing and Demultiplexing Multiplexing - Combining information streams from multiple sources for transmission over a shared medium Carried out by a multiplexor Demultiplexing the separation of the combined information streams into their constituent streams 7

8 Multiplexing Several logical connections share a single physical connection Frequency Division Multiplexing (FDM) Two or more signals with different carrier frequencies transmitted over one medium Minimum frequency separation => requires high bandwidth connection Broadband (vs. baseband) technology Spread spectrum - use of multiple carriers to improve reliability Also, single logical channel may simultaneously use multiple carriers to improve performance 8

9 Wavelength Division Multiplexing (WDM) The application of FDM to optical fibre Uses prisms to combine beams of light of different wavelengths into a single beam From Comer, 2009 Time Division Multiplexing TDM is an alternative to FDM where the sources sharing the medium take turns Synchronous Time Division Multiplexing When TDM is applied to a synchronous network No gap occurs between items Uses a round robin order to select items to send BUT if a source doesn t have data to send? Fill its slot with a value (e.g. Zero), set a bit to indicate value is invalid Statistical Multiplexing better alternative skips a source if it does not have data to send 9

10 Inverse Multiplexing Commonly used on the Internet When service providers need higher bit rates than are available Uses multiplexing in reverse Spread a high-speed digital input over multiple lower-speed circuits for transmission Combine them at the receiving end Sender and receiver have to agree on how data arriving from the input will be distributed over the lower-speed connections Digital Subscriber Line (DSL) Uses the two-wire local loop from telephone company end office to homes Normal telephone lines are limited to the frequency range of human voices ( Hz) DSL uses the entire bandwidth of the local loop However, capacity decreases with connection distance limit 18,000 feet (5,460 m) 10

11 Digital Subscriber Line (DSL) Uses FDM Data divided into separate channels, each 4 KHz wide Bandwidth of the local loop divided into 3 regions: POTS = Plain Old Telephone System used for voice Usually 80-90% of the rest of the channels are used for downstream communication (Asymmetrical DSL) DSL Variants Name Expansion General Use ADSL Asymmetric DSL Residential Customers ADSL2 Asymmetric DSL version 2 Approx. 3 times faster SDSL Symmetric DSL Businesses that export data HDSL High bit rate DSL Businesses up to 3 miles away VDSL Very-high bit rate DSL Proposed version for 52 Mbps Collectively known as xdsl From Comer,

12 ADSL Data Rates ADSL speed Downstream Upstream Maximum 8Mbps 640 Kbps ADSL2 can download up to almost 20Mbps ADSL does not guarantee a data rate Different line conditions affect data rates ADSL modems use techniques to select frequencies and modulation techniques that yield the best results Cable Modem Technologies ADSL uses twisted pair cables Inherently susceptible to EM interference Cable modem technologies - alternative to ADSL Uses wiring already in place for cable TV Coaxial cable High bandwidth, less susceptible to EM interference Use FDM and statistical multiplexing Theoretical data rate: 52Mbps downstream, 512 Kbps upstream (in practice can be much less) 12

13 Cable Connection - A single cable is shared by many houses + Bandwidth of coax much higher than TP Cable television Fixed telephone system Cable Connection (2) Sharing the cable for Internet and TV To cope with long coaxial cables analog modulation is needed downstream channels a form of AM upstream channels a form of PSK A cable modem connects a computer (through USB or Ethernet interface) to the cable network 13

14 Summary Modulation - FM, AM and phase shift keying (PSK) Modems, including dial-up modems Multiplexing FDM, WDM, TDM DSL and Cable connection Reading: Chapters (parts of as covered in lecture notes), Computer Networks and Internets, Comer, 5 th Edition,

### Objectives. Lecture 4. How do computers communicate? How do computers communicate? Local asynchronous communication. How do computers communicate?

Lecture 4 Continuation of transmission basics Chapter 3, pages 75-96 Dave Novak School of Business University of Vermont Objectives Line coding Modulation AM, FM, Phase Shift Multiplexing FDM, TDM, WDM

### (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

### 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

### EECC694 - Shaaban. Transmission Channel

The Physical Layer: Data Transmission Basics Encode data as energy at the data (information) source and transmit the encoded energy using transmitter hardware: Possible Energy Forms: Electrical, light,

### :-------------------------------------------------------Instructor---------------------

Yarmouk University Hijjawi Faculty for Engineering Technology Computer Engineering Department CPE-462 Digital Data Communications Final Exam: A Date: 20/05/09 Student Name :-------------------------------------------------------Instructor---------------------

### 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

### Multiplexing on Wireline Telephone Systems

Multiplexing on Wireline Telephone Systems Isha Batra, Divya Raheja Information Technology, Dronacharya College of Engineering Farrukh Nagar, Gurgaon, India ABSTRACT- This Paper Outlines a research multiplexing

### 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

### 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

### Multiplexing. Multiplexing is the set of techniques that allows the simultaneous transmission of multiple signals across a single physical medium.

Multiplexing Multiplexing is the set of techniques that allows the simultaneous transmission of multiple signals across a single physical medium. The following two factors in data communications lead to

### 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)

### 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

### Data Transmission via Modem. The Last Mile Problem. Modulation of Digital Signals. Modem Standards (CCITT)

The Last Mile Problem LN, MN, WN how to connect private users at home to such networks? Problem of the last mile: somehow connect private homes to the public Internet without laying many new cables By

### 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

### Data Transmission. Data Communications Model. CSE 3461 / 5461: Computer Networking & Internet Technologies. Presentation B

CSE 3461 / 5461: Computer Networking & Internet Technologies Data Transmission Presentation B Kannan Srinivasan 08/30/2012 Data Communications Model Figure 1.2 Studying Assignment: 3.1-3.4, 4.1 Presentation

### 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

### Public Switched Telephone System

Public Switched Telephone System Structure of the Telephone System The Local Loop: Modems, ADSL Structure of the Telephone System (a) Fully-interconnected network. (b) Centralized switch. (c) Two-level

### Analog vs. Digital Transmission

Analog vs. Digital Transmission Compare at two levels: 1. Data continuous (audio) vs. discrete (text) 2. Signaling continuously varying electromagnetic wave vs. sequence of voltage pulses. Also Transmission

### INTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA

COMM.ENG INTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA 9/6/2014 LECTURES 1 Objectives To give a background on Communication system components and channels (media) A distinction between analogue

### 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

### Computers Are Your Future. 2006 Prentice-Hall, Inc.

Computers Are Your Future 2006 Prentice-Hall, Inc. Computers Are Your Future Chapter 3 Wired and Wireless Communication 2006 Prentice-Hall, Inc Slide 2 What You Will Learn... ü The definition of bandwidth

### 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

### 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

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

### 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

### ANALOG VS DIGITAL. Copyright 1998, Professor John T.Gorgone

ANALOG VS DIGITAL 1 BASICS OF DATA COMMUNICATIONS Data Transport System Analog Data Digital Data The transport of data through a telecommunications network can be classified into two overall transport

### 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

### 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.

### 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

### 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

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

### 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

### 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

### 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

### 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

### 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

### By: Mohsen Aminifar Fall 2014

By: Mohsen Aminifar Fall 2014 Contact Information: E-Mail: m.aminifar@modares.ac.ir admin@parsenet.ir Phone : 021-22919726 09128442885 Website : http://parsenet.ir http://aminifar.ir SMS Center : 5000262175

### 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

### 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

### Access to Data & Computer Networks Physical Level

Lecture 7 Access to Data & Computer Networks Physical Level Serial Interface RS232C, RS232D RS449, X21 Modem Traditional Modem Intelligent modem Wireless Modem Digital Telephony T1 & E1 Systems SONET/SDH

### 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

### 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

### Long Distance Connection and WAN

Lecture 6 Long Distance Connection and WAN Digital Telephone, PCM and Nyquist Sampling Theorem DSU/CSU, T Line Series and OC line Series Local Loop DSL Technologies - ADSL, HDSL, SDSL, VDSL Cable Modem

### 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

### Chapter 6 Bandwidth Utilization: Multiplexing and Spreading 6.1

Chapter 6 Bandwidth Utilization: Multiplexing and Spreading 6.1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Note Bandwidth utilization is the wise use of

### Physical Layer. Communication Satellites. ECE 453 Introduction to Computer Networks. Lecture 3 Physical Layer II

ECE 453 Introduction to Computer Networks Lecture 3 Physical Layer II 1 Physical Layer Services transmit bits from sender to receiver. Transmission media Guided: twisted pair, coax, fiber Unguided (wireless):

### Next Generation of High Speed. Modems8

Next Generation of High Speed Modems High Speed Modems. 1 Traditional Modems Assume both ends have Analog connection Analog signals are converted to Digital and back again. Limits transmission speed to

### Lecture 3: Signaling and Clock Recovery. CSE 123: Computer Networks Stefan Savage

Lecture 3: Signaling and Clock Recovery CSE 123: Computer Networks Stefan Savage Last time Protocols and layering Application Presentation Session Transport Network Datalink Physical Application Transport

### 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

### CHAPTER 8 MULTIPLEXING

CHAPTER MULTIPLEXING 3 ANSWERS TO QUESTIONS.1 Multiplexing is cost-effective because the higher the data rate, the more cost-effective the transmission facility.. Interference is avoided under frequency

### Chapter 2 from Tanenbaum - modified. The Physical Layer. Ref: A.S. Tanenbaum, Computer Networks, 4 th Ed., Prentice-Hall, 2003, ISBN: 0-13-038488-7.

Chapter 2 from Tanenbaum - modified The Physical Layer Ref: A.S. Tanenbaum, Computer Networks, 4 th Ed., Prentice-Hall, 2003, ISBN: 0-13-038488-7. Data Communications over Wireless and Digital Wired Systems

### 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

### Solution. (Chapters 5-6-7-8) Dr. Hasan Qunoo. The Islamic University of Gaza. Faculty of Engineering. Computer Engineering Department

The Islamic University of Gaza Faculty of Engineering Computer Engineering Department Data Communications ECOM 4314 Solution (Chapters 5-6-7-8) Dr. Hasan Qunoo Eng. Wafaa Audah Eng. Waleed Mousa 1. A cable

### 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

### Digital vs. Analog Transmission

Digital vs. Analog Transmission Two forms of transmission: digital transmission: data transmission using square waves analog transmission: data transmission using all other waves Four possibilities to

### 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

### A General Glossary of Telecommunications Terminology

1 A General Glossary of Telecommunications Terminology Analog Electronic transmission of voice and data accomplished by adding signals of varying frequency, or amplitude, to carrier waves of a given frequency

### Sol: Optical range from λ 1 to λ 1 +Δλ contains bandwidth

1. Use Figure 3.47 and Figure 3.50 to explain why the bandwidth of twisted-wire pairs and coaxial cable decreases with distance. Figure 3.47 figure 3.50 sol: The bandwidth is the range of frequencies where

### 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

### 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

### 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

### 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,

### 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

### Fundamentals of Telecommunications

Fundamentals of Telecommunications Professor of CIS Columbus, OH 43210 Jain@ACM.Org http://www.cis.ohio-state.edu/~jain/ 1 Overview Time Division Multiplexing T1, T3, DS1, E1 T1 Framing Echo Cancellation

### 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

### 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

### 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

### C.Courcoubetis G.D.Stamoulis Spring 2011

Broadband (IV): Cable access, Fiber, and other Media C.Courcoubetis G.D.Stamoulis Spring 2011 Introduction C. Courcoubetis, G.D. Stamoulis Broadband 4: Cable, fiber, - 2 Basic access technologies HFC SDV

### 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 TTG4: McAdams, Cioffi, Bloom, Hargadon Digital Subscriber Line (DSL) telecommunication service

### The Telephone Network

The Telephone Network 1 2 PSTN public switched telephone network (PSTN) is the largest and most widespread communications network in the world For computer communications used to link remote sites of organisation

### CSCI 491-01 Topics: Internet Programming Fall 2008

CSCI 491-01 Topics: Internet Programming Fall 2008 Introduction Derek Leonard Hendrix College September 3, 2008 Original slides copyright 1996-2007 J.F Kurose and K.W. Ross 1 Chapter 1: Introduction Our

### 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

### Unit of Learning # 2 The Physical Layer. Redes de Datos Sergio Guíñez Molinos sguinez@utalca.cl 1-2009

Unit of Learning # 2 The Physical Layer Redes de Datos Sergio Guíñez Molinos sguinez@utalca.cl 1-2009 The Theoretical Basis for Data Communication Sergio Guíñez Molinos Redes de Computadores 2 The Theoretical

### 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

### Broadband access. Nils Holte, NTNU. NTNU Department of Telecommunications Kursdagene ved NTNU, Digitale telenett, 9. januar 2002 1.

Broadband access - properties of the copper network Nils Holte, Kursdagene ved, Digitale telenett, 9. januar 2002 1 Definition of broadband Overview Alternatives for fixed broadband access pair cable,

### Copyright. Transport networks. Physical layer Transport and access networks. Pag. 1

Physical layer Transport and access networks Gruppo Reti TLC nome.cognome@polito.it http://www.telematica.polito.it/ COMPUTER NETWORK DESIGN Physical layer review - 1 Copyright Quest opera è protetta dalla

### 1.264 Lecture 32. Telecom: Basic technology. Next class: Green chapter 4, 6, 7, 10. Exercise due before class

1.264 Lecture 32 Telecom: Basic technology Next class: Green chapter 4, 6, 7, 10. Exercise due before class 1 Exercise 1 Communications at warehouse A warehouse scans its inventory with RFID readers that

### CMPT 165: The Internet, Part 3

CMPT 165: The Internet, Part 3 Tamara Smyth, tamaras@cs.sfu.ca School of Computing Science, Simon Fraser University September 15, 2011 1 Basic Communication Technology Packet Switching (sharing a tranmission

### 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

### Chapter 1: roadmap. Access networks and physical media

Chapter 1: roadmap 1.1 What is the nternet? 1.2 Network edge 1.3 Network core 1.4 Network access and physical media 1.5 nternet structure and SPs 1.6 elay & loss in packet-switched networks 1.7 Protocol

### Physical Layer Part 2. Data Encoding Techniques. Networks: Data Encoding 1

Physical Layer Part 2 Data Encoding Techniques Networks: Data Encoding 1 Analog and Digital Transmissions Figure 2-23.The use of both analog and digital transmissions for a computer to computer call. Conversion

### 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

### Think! Think! Data communications. Long-Distance. Modems: to analog and back. Transmission Media. The last mile is the hardest for digital information

Data communications Think! Think!?? What makes it possible to communicate from point A to point B?? Long-Distance Transmission Media If you place a call outside the local transport area, an interchange

### 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,

### Network+ Guide to Networks, Fourth Edition. Chapter 7 WANs, Internet Access, and Remote Connectivity. Objectives

Network+ Guide to Networks, Fourth Edition Chapter 7 WANs, Internet Access, and Remote Connectivity Objectives Identify a variety of uses for WANs Explain different WAN topologies, including their advantages

### CS423: Lectures 2-4, Physical Layer. George Varghese. April 16, 2008

CS423: Lectures 2-4, Physical Layer George Varghese April 16, 2008 What does the Physical Layer Do? bits SENDER PHYSICAL LAYER RECEIVER 1 RECEIVER 1 RECEIVER 1 A possibly faulty, single-hop, bit pipe that

### Digital Subscriber Line (DSL) Transmission Methods

Digital Subscriber Line (DSL) Transmission Methods 1. Overview... 1 2. SHDSL Transmission Methods... 1 SHDSL Transmission System Versions... 1 SHDSL Transmission Subsystem Structure... 1 SHDSL Modulation

### BROADBAND AND HIGH SPEED NETWORKS

BROADBAND AND HIGH SPEED NETWORKS INTRODUCTION TO MUTIPLEXING Multiplexing is the set of techniques that allows the simultaneous transmission of multiple signals across a single data link INTRODUCTION

### 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:

### 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

### 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

### About Me" List of Lectures" In This Course" Mobile and Sensor Systems. Lecture 1: Introduction to Wireless Systems" " Dr. Cecilia Mascolo" "

About Me Reader in Mobile Systems NetOS Research Group Research on Mobile, Social and Sensor Systems More specifically, Human Mobility and Social Network modelling Opportunistic Mobile Networks Mobile

### Appendix 1: Satellite broadband service providers

Appendixes Appendix 1: Satellite broadband service providers In 2005 06, satellite broadband services were provided by the following companies: Australian Private Networks (ACTIV8me) Be Communications

### 1.264 Lecture 21. Telecom network technology: Fiber, satellite, cellular telephony, cable modems, DSL

1.264 Lecture 21 Telecom network technology: Fiber, satellite, cellular telephony, cable modems, DSL Network technology We ve just covered the basic components of transmission, switching/ routing and physical

### Telecommunications Technology

Unit 12: Telecommunications Technology Unit code: K/601/3290 QCF Level 2: BTEC Specialist Credit value: 10 Guided learning hours: 60 Aim and purpose To enable learners to know how telecommunication systems

### Broadband Access Technologies

Broadband Access Technologies Chris Wong Communications Engineering Sector Analysis & Reporting Branch International Training Program 23 October 2007 Presentation Outline What is broadband? What are the

### 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:

### TELECOMMUNICATION SYSTEMS

TELECOMMUNICATION SYSTEMS IP Networking Through Telecommunication System System Engineering BSc Full-time Overview Phone Line Modems Accoustic modem PSTN modem ISDN modem ADSL XDSL Acoustic modems Connection