Telephone – Inventions That Revolutionized the World
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De Telefoon Van Reis
De Telefoon van Reis 05-01-2016 Ontwerpopdracht profielwerkstuk van: Thomas Aleva & Nwankwo Hogervorst Inhoudsopgave Inleiding ........................................................................................................................... 3 Onderzoeksvraag ............................................................................................................................. 3 Johann Philipp Reis........................................................................................................................... 3 Globale werking van de telefoon van Reis ....................................................................................... 3 Globale werking van de telefoon van Bell ....................................................................................... 4 Het ontwerp ..................................................................................................................... 4 Ontwerpcyclus ................................................................................................................................. 5 Programma van eisen: ..................................................................................................................... 5 Deeloplossingen ............................................................................................................................... 6 Ontwerpvoorstel .............................................................................................................................. 6 Benodigdheden ............................................................................................................................... -
The Great Telecom Meltdown for a Listing of Recent Titles in the Artech House Telecommunications Library, Turn to the Back of This Book
The Great Telecom Meltdown For a listing of recent titles in the Artech House Telecommunications Library, turn to the back of this book. The Great Telecom Meltdown Fred R. Goldstein a r techhouse. com Library of Congress Cataloging-in-Publication Data A catalog record for this book is available from the U.S. Library of Congress. British Library Cataloguing in Publication Data Goldstein, Fred R. The great telecom meltdown.—(Artech House telecommunications Library) 1. Telecommunication—History 2. Telecommunciation—Technological innovations— History 3. Telecommunication—Finance—History I. Title 384’.09 ISBN 1-58053-939-4 Cover design by Leslie Genser © 2005 ARTECH HOUSE, INC. 685 Canton Street Norwood, MA 02062 All rights reserved. Printed and bound in the United States of America. No part of this book may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without permission in writing from the publisher. All terms mentioned in this book that are known to be trademarks or service marks have been appropriately capitalized. Artech House cannot attest to the accuracy of this information. Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark. International Standard Book Number: 1-58053-939-4 10987654321 Contents ix Hybrid Fiber-Coax (HFC) Gave Cable Providers an Advantage on “Triple Play” 122 RBOCs Took the Threat Seriously 123 Hybrid Fiber-Coax Is Developed 123 Cable Modems -
Telephone Talking to Your Neighbor Hasn’T Always Been As Easy As Picking up the Receiver
INVENTIONS The Telephone Talking to your neighbor hasn’t always been as easy as picking up the receiver BY CATHERINE V.O. HOFFBERGER “Mr. Watson, come in here. I need you!” These historic words are as recognizable as Martin Luther King Jr.’s inspiring “I Have a Dream” and John F. Kennedy’s philosophical “Ask not what your country can do for you— ask what you can do for your country.” Uttered by one Alexander Graham Bell on March 7, 1876, this quote is remem- bered not for its eloquence or effect, but for what it represents: the invention of that great tool of everyday life, the Telephone. Bell, born in Scotland to a deaf mother in 1847, followed the professional footsteps of his father, uncle and grandfa- ther, all professors of elocution (the study of speaking). Young “Aleck,” a passionate elocutionist, specialized in teaching speech to the deaf. Telephony, the science of producing sound (‘phono’) electrically over distance (‘tele’), was the rage among Three weeks later, Mr. Watson famously heard Bell sum- 19th-century inventors. The telegraph, created in England moning him over its wires. As his was the first telephone in 1833 and soon improved by American Samuel Morse, to truly work and receive a patent, Bell was credited with accomplished that in staccato, on-and-off rhythms. By the the invention. mid-1800s, it was the world’s means of long-distance audi- Bell’s fledgling business sold just six telephones in its ble communication. Bell and other scientists across first month. But by 1891, the company, by then known as Europe and in the United States including Antonio AT&T (the Atlantic Telephone and Telegraph Co.), was Meucci, Johann Philipp Reis, Elisha Gray and Thomas operating some 5 million phones in America. -
Local-Loop and DSL REFERENCE GUIDE Table of Contents
Local-Loop and DSL REFERENCE GUIDE Table of Contents Prologue ............................................................................ 2 2.3.9.3 REIN ....................................................................32 2.3.9.4 SHINE..................................................................32 1. Introduction ................................................................. 5 2.3.9.5 PEIN ....................................................................32 2. What is DSL? ................................................................ 6 2.3.10 Bonding...............................................................33 2.3.11 Vectoring ............................................................35 2.1 Pre-DSL Delivery of Data ........................................................... 6 2.3.12 G.Fast ..................................................................36 2.1.1 Dial-Up ................................................................................ 6 2.1.2 ISDN .................................................................................... 7 3. DSL Deployment Issues ...........................................38 2.2 xDSL Overview ............................................................................. 8 3.1 Determining the Nature of the Problem ...............................39 2.3 DSL In-Depth .............................................................................12 3.2 Performing a Visual Inspection ..............................................44 2.3.1 ISDN ..................................................................................13 -
The Marriage That Almost Was Western Union Has Always Been R.Idiculed for Rejecting the All Telephone
RETROSPECTIVE .Innovation The marriage that almost was Western Union has always been r.idiculed for rejecting the telephone. But what actually happened wasn't so ridiculous after all The hirth of the telephone.,-one hundred years ago railway and illuminating gas to Cambridge, Mass. this month-is a fascinating story of the geJ;Jius and Long intrigued by telegraphy, he decided to do persistence of on.e man. In addition, it is an instruc something about what he called "this monopoly tive demonstration of how an industrial giant, in with its inflated capital which serves its stockhold this case the Western Union Telegraph Co., can ers better than the 'public and whose:rates are ex miss its chance to foster an industry-creating orbitant and prohibiting of many kinds of busi breakthrough-something that has happened again ness." Between 1868 and 1874, he lobbied unceas and again in electronics and other fields. ingly, shuttling back and forth betweep. homes in Between ·1875 and 1879, Western Union's chiefs Boston and Washington. for a private "postal tele engaged in an intricate minuet with Alexander graph company" to be chartered by Congress but Graham Bell and his associates. On more than one with Hubbard and some of his friends among the occasion, the telegraph colossus came excruciating incorporators. As Hubbard envisioned it, the com ly close to absorbing the small group of ~ntre pany would build telegraph lines along the nation's preneurs, That the absorption was finally avoided rail and post roads and contract with the Post was probably the result of a technological gamble Office Department to send telegrams on its wires ~t that simply didn't payoff, as rates roughly half those being charged by Western ••• The place: the ollie of well as a clash of personali Union. -
Telecommunication Switching Networks
TELECOMMUNICATION SWITCHING AND NETWORKS TElECOMMUNICATION SWITCHING AND NffiWRKS THIS PAGE IS BLANK Copyright © 2006, 2005 New Age International (P) Ltd., Publishers Published by New Age International (P) Ltd., Publishers All rights reserved. No part of this ebook may be reproduced in any form, by photostat, microfilm, xerography, or any other means, or incorporated into any information retrieval system, electronic or mechanical, without the written permission of the publisher. All inquiries should be emailed to [email protected] ISBN (10) : 81-224-2349-3 ISBN (13) : 978-81-224-2349-5 PUBLISHING FOR ONE WORLD NEW AGE INTERNATIONAL (P) LIMITED, PUBLISHERS 4835/24, Ansari Road, Daryaganj, New Delhi - 110002 Visit us at www.newagepublishers.com PREFACE This text, ‘Telecommunication Switching and Networks’ is intended to serve as a one- semester text for undergraduate course of Information Technology, Electronics and Communi- cation Engineering, and Telecommunication Engineering. This book provides in depth knowl- edge on telecommunication switching and good background for advanced studies in communi- cation networks. The entire subject is dealt with conceptual treatment and the analytical or mathematical approach is made only to some extent. For best understanding, more diagrams (202) and tables (35) are introduced wherever necessary in each chapter. The telecommunication switching is the fast growing field and enormous research and development are undertaken by various organizations and firms. The communication networks have unlimited research potentials. Both telecommunication switching and communication networks develop new techniques and technologies everyday. This book provides complete fun- damentals of all the topics it has focused. However, a candidate pursuing postgraduate course, doing research in these areas and the employees of telecom organizations should be in constant touch with latest technologies. -
The Early Years of the Telephone
©2012 JSR The early years of the telephone The early years of the telephone John S. Reid Before Bell Ask who invented the telephone and most people who have an answer will reply Alexander Graham Bell, and probably clock it up as yet another invention by a Scotsman that was commercialised beyond our borders. Like many one line summaries, this is partly true but it credits to one person much more than he really deserves. Bell didn’t invent the word, he didn’t invent the concept, what ever the patent courts decreed, and actually didn’t invent most of the technology needed to turn the telephone into a business or household reality. He did, though, submit a crucial patent at just the right time in 1876, find backers to develop his concept, promoted his invention vigorously and pursued others through the courts to establish close to a monopoly business that made him and a good many others very well off. So, what is the fuller story of the early years of the telephone? In the 1820s, Charles Wheatstone who would later make a big name for himself as an inventor of telegraphy equipment invented a device he called a ‘telephone’ for transmitting music from one room to the next. It was not electrical but relied on conducting sound through a rod. In the same decade he also invented a device he called a ‘microphone’, for listening to faint sounds, but again it was not electrical. In succeeding decades quite a number of different devices by various inventors were given the name ‘telephone’. -
Two Paths to the Telephone
; --..- �-' f4�: . STRIKING PARALLELS between the telephones envisioned by electrode. In Bell's the variation would depend on the changes in the Elisha Gray and Alexander Graham Bell are evident in their respec area of the wedge-shaped needle tip immersed in the bath. The vary tive sketches of the instruments. Both Gray's transmitter(top) and ing current would then pass through an electromagnet(right) at the Bell's (bottom) depended on varying the resistance to the flow of cur receiving end of the circuit; variations in the magnetic field would rent from a battery. Both variations would be caused by the vertical cause a second diaphragm (in Gray's scheme) or a metal reed (in movement of a needle in a liquid bath; the motion would be due to Bell's) to vibrate, thereby reproducing the sound waves that actu the response of a diaphragm to the sound waves of the human voice. ated the transmitter. Gray made the sketch of his device on February In Gray's transmitter the variation in resistance would depend on 11, 1876, some two months after he conceived the idea. Bell made changes in the distance between the tip of the needle and the bottom his sketch on March 9, 24 days after filing his patent application. 156 © 1980 SCIENTIFIC AMERICAN, INC Two Paths to the Telephone As Alexander Graham Bell was developing the telephone Elisha Gray was doing the same. Bell got the patent, but the episode is nonetheless an instructive example of simultaneous invention by David A. Hounshell n one day in 1876-February 14-the one-third interest in the business, and also connected one lead of the second U.S. -
The Evolution of Science-Fiction Films and Novels
2010 JUMP By Douglas Fenech, Christian Gradwohl & Jan Westren-Doll [DOES SCIENCE-FICTION PREDICT THE FUTURE??] [This research paper looks at a selection of science-fiction films and its connection with the progression of the television, the telephone and print media. It also analyzes statistical data obtained from a questionnaire conducted by the research group regarding communication media.] January 1, 2010 [DOES SCIENCE-FICTION PREDICT THE FUTURE OR CHANGE IT?] Table of Contents Introduction……………………………………………………………………………………………………………………………….4 Science-fiction filmmakers are not modern day Leonardo da Vinci’s…………………………………………5 Predictions of the future in science-fiction films and novels………………………………………………………6 History of the future………………………………………………………………………………………………………………….8 The evolution of science-fiction films and novels.........................................................................11 A look into Television....................................................................................................................13 Mechanical Television.......................................................................................................13 Electronic Television.........................................................................................................14 Colour Television..............................................................................................................15 The Remote Control..........................................................................................................16 -
History of Communication
History of Communication Animals have their own methods of communication. For example Dolphins use sound to communicate with other dolphins and to echolocate when hunting. From the early history of human existence there have been many ways of communicating each other. People from different parts of the world use a variety of languages to express their thoughts. Gradually civilization thrived and ways of communicating other continents became a general need to build up political and economical inter-relationships among them. We find many curious and interesting methods of communication in the history of the world. Sri Lankan history reveals that messages were sent by birds often. And some messages were named after the bird that carried it. The postal system was one of the early forms of communication. Chou Dynasty created his own postal system in 1000 B.C. The mail would travel on a horse to the next pass. Romans had their own system called the “Cursus Pubius”, they used foot messengers. Genghis Khan made an early postal system using homing pigeons. Middle Age in European history is a very important period. After the invention of the printing machine people in Europe gathered knowledge by reading. They started thinking. Hence, many inventions and theories came forward. Among them were telegraph, telephone, television and radio. British inventors Sir Charles Wheatstone and William F. Cook invented the telegraph in 1837. Samuel Morse invented the telegraph communication system called the Morse code. It had long and short electrical impulses referring as dots and dashes. Each impulse is either a letter or number. -
A History of Audio Effects
applied sciences Review A History of Audio Effects Thomas Wilmering 1,∗ , David Moffat 2 , Alessia Milo 1 and Mark B. Sandler 1 1 Centre for Digital Music, Queen Mary University of London, London E1 4NS, UK; [email protected] (A.M.); [email protected] (M.B.S.) 2 Interdisciplinary Centre for Computer Music Research, University of Plymouth, Plymouth PL4 8AA, UK; [email protected] * Correspondence: [email protected] Received: 16 December 2019; Accepted: 13 January 2020; Published: 22 January 2020 Abstract: Audio effects are an essential tool that the field of music production relies upon. The ability to intentionally manipulate and modify a piece of sound has opened up considerable opportunities for music making. The evolution of technology has often driven new audio tools and effects, from early architectural acoustics through electromechanical and electronic devices to the digitisation of music production studios. Throughout time, music has constantly borrowed ideas and technological advancements from all other fields and contributed back to the innovative technology. This is defined as transsectorial innovation and fundamentally underpins the technological developments of audio effects. The development and evolution of audio effect technology is discussed, highlighting major technical breakthroughs and the impact of available audio effects. Keywords: audio effects; history; transsectorial innovation; technology; audio processing; music production 1. Introduction In this article, we describe the history of audio effects with regards to musical composition (music performance and production). We define audio effects as the controlled transformation of a sound typically based on some control parameters. As such, the term sound transformation can be considered synonymous with audio effect. -
Cit 305: Networking and Communication Technology
CIT 305: NETWORKING AND COMMUNICATION TECHNOLOGY 1 NATIONAL OPEN UNIVERSITY OF NIGERIA FACULTY OF SCIENCE DEPARTMENT OF COMPUTER SCIENCE COURSE CODE: CIT305 COURSE TITLE: NETWORKING AND COMMUNICATION TECHNOLOGY 2 COURSE GUIDE CIT305 NETWORKING AND COMMUNICATION TECHNOLOGY CourseTeam Prof A.S. Sodiya (Developer/Writer)–FUNAAB Dr. A. A. Afolorunso (Coordinator)-NOUN 3 CONTENTS PAGE Introduction........................................................................................ 1 WhatYouWillLearnin ThisCourse................................................ 1 Course Aims...................................................................................... 1 CourseObjectives…………………………………………….……. 1 WorkingthroughThisCourse............................................................ 2 CourseMaterials................................................................................. 2 2 StudyUnits........................................................................................ AssignmentFile.................................................................................. 3 Tutor-MarkedAssignments(TMAs)................................................. 3 ExaminationandGrading................................................................... 4 PresentationSchedule........................................................................ 4 CourseMarkingScheme.................................................................... 5 CourseOverview…………………………………………………… 5 Howto Getthe MostfromThisCourse...........................................