Historical Perspectives of Development of Antique Analog Telephone Systems

Patil, V. L.

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Tytuł artykułu

Historical Perspectives of Development of Antique Analog Telephone Systems

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Patil V. L.

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Abstrakty

Long distance voice communication has been always of great interest to human beings. His untiring efforts and intuition from many years together was responsible for making it to happen to a such advanced stage today. This paper describes the development time line of antique telephone systems, which starts from the year 1854 and begins with the very early effort of Antonio Meucci and Alexander Graham Bell and ends up to the telephone systems just before digitization of entire telecommunication systems. The progress of development of entire antique telephone systems is highlighted in this paper. The coverage is limited to only analog voice communication in a narrow band related to human voice.

Słowa kluczowe

antique telephones common battery systems cross-bar switches PSTN voice band communication voice communication strowger switches

Wydawca

Instytut Łączności - Państwowy Instytut Badawczy

Czasopismo

Journal of Telecommunications and Information Technology

Rocznik

2015

Tom

nr 3

Strony

70--98

Opis fizyczny

Bibliogr. 145 poz., rys.

Twórcy

autor

Patil V. L.

patilvl.works@gmail.com

Trinity College of Engineering and Research, University of Pune, Ganesh Khind, 411007 Pune, India

Bibliografia

[1] F. M. Sorrentino and J. Krase, The Review of Italian American Studies. Lanham, Maryland, USA: Lexington Books, 2000.
[2] G. E. Schiavo, Antonio Meucci Inventor of the Telephone. New York: The Vigo Press, 1958, pp. 171–181.
[3] Andrea Sandre, Italy@150 – Celebrating the Friendship Between Italy and the United States, published by Embassy of Italy in Washington (DC), 2011.
[4] B. Catania, “Il governo degli stati uniti contro Alexander Graham Bell”, Supplemento di AEI Automazione Energia Informazione, no. 10, 1999 (in Italian).
[5] B. Catania, “Un documento inedito rivaluta l’opera di Antonio Meucci”, AEI – Automazione, Energia, Informazione, vol. 82, no. 2, 1995, pp. 32–40 (in Italian).
[6] B. Catania, “Antonio Meucci Revisited”, Antenna, Newsletter of the Mercurians, in the Society for the History of Technology, vol. 9, no. 1, pp. 4–5, 1996.
[7] M. D. Fagen, A History of Engineering and Science in the Bell System: The Early Years (1875–1925). New York: Harper and Row Publishers, 1975.
[8] F. Winwar, “Il Monumento di Staten Island: Meucci, Garibaldi e il telefono”, Poste e Telecomunicazioni, Apr. 1958, p. 307 (in Italian).
[9] C. Bourseul, “Transmission electrique de la parole”, L’Illustration, Aug. 26, 1854 (in French).
[10] R. Camboulives, “Un Occitan d’adoption: Charles Bourseul, inventeur du téléphone”, communication faite `a l’Académie des sciences, inscriptions et Belles-lettres de Toulouse dans sa séance du 8 novembre 1978 (in French).
[11] S. P. Thompson, Philipp Reis: Inventor of the Telephone. New York: Arno Press, 1974.
[12] F. I. Green, “Telephone”, The Bell System Tech. J., vol. 37, no. 2, 1958, pp. 289–338.
[13] F. William and M. D. Channing, “The telephone, with a sketch of its inventor, Philipp Reis”, Popular Science Monthly, vol. 23, 1883, pp. 540–551.
[14] R. J. P. Weber and D. N. Perkins, (Eds.), Inventive Minds: Creativity in Technology. New York: Oxford University Press, 1992, pp. 48–79.
[15] “Fundamentals of Telephone Communication Systems”, Western Electric Co., New York, NY, USA, 1969.
[16] D. Mercer, The Telephone: The Life Story of a Technology. Westport, CT, USA: Greenwood Publishing Group, 2006.
[17] The Telephone in America, American Telephone and Telegraph Company, New York, NY, USA, 1936 & 1952.
[18] “Alexander Graham Bell – American inventor”, Encyclopædia Britannica [Online]. Available: http://www.britannica.com/biography/Alexander-Graham-Bell
[19] L. Coe, The Telephone and It’s Several Inventors: A History. Jefferson, NC: McFarland, 1995.
[20] H. N. Casson, The History of the Telephone, 10th ed. Chicago, USA: A. C. McClurg & Co., 1922.
[21] B. S. Finn, “Bell and Gray: just a coincidence?”, Technology and Culture, vol. 50, no. 1, pp. 193–201, 2009.
[22] T. Farley and M. van der Hoek, “Telephone History: The Inventors Gray and Bell”, Jan, 2006 [Online]. Available: http://www.privateline.com/mttelephonehistory/2006/01/the inventors gray and bell.html
[23] M. E. Gorman and W. B. Carlson, “Interpreting invention as a cognitive process: THE CASe of Alexander Graham Bell, Thomas Edison and the telephone”, Science Technol. & Human Values, vol. 15, no. 2, pp. 131–164, 1990.
[24] A. G. Bell, “Experiments made by Alexander Graham Bell”, Bell Notebooks Pages, vol. I, p. 26, 1876.
[25] C. Wheatstone, The Scientific Papers of Sir Charles Wheatstone. London: Taylor & Francis, 1879.
[26] F. W. Wile, Emile Berliner – Maker of the Microphone. New York: Arno Press, 1974.
[27] E. Berliner, “Improvement in electrical-contact telephones”, U.S. Patent no. 222652, Dec. 1879.
[28] F. L. Dyer and T. M. Commerford, Edison: His Life and Inventions, vol. 1. New York: Harper & Brothers Publishers, 1910, p. 226.
[29] B. Heil, “The microphone: a short illustrated history”, QST, vol. 90, no. 6, p. 50, 2006.
[30] I. Wills, “Instrumentalizing failure: Edison’s invention of carbon microphone”, Annals of Science, vol. 64, no. 3, pp. 383–409, 2007.
[31] I. Hughes, “Professor David Edward Hughes”, AWA Review, vol. 22, pp. 111–134, 2009.
[32] D. M. Worrall, “David Edward Hughes: Concertinist and Inventor”, Papers of the International Concertina Association (PICA), pp. 41–57, vol. 4, 2007.
[33] Early Telephone Apparatus [Online]. Available: http://www.sparkmuseum.com/TELEPHONE.HTM
[34] J. Klapholz, “History and development of microphones”, Sound & Commun. Mag., Sept./Oct., 1986.
[35] W. H. Martin, “Seventy-five years of telephone: an evolution in technology”, Bell System Technical J., vol. 30, no. 2, pp. 215–238, 1951.
[36] A. G. Bell, “Bell’s Experimental Notebook”, vol. 1, p. 40, 1876 (Manuscript Division, Library of Congress, USA).
[37] A. A. Huurdeman, Worldwide History of Telecommunications. Hoboken, NJ, USA: Wiley, 2003, pp. 237–240.
[38] T. Farley, Telephone History Series (Rev. 1), Aug. 2010, pp. 1–45 [Online]. Available: http://www.privateline.com/TelephoneHistory/History1.htm
[39] A. L. Albert, Electrical Communication, 3rd ed. New York: Wiley and London: Chapman & Hall, 1954.
[40] A. G. Bell, “Invention of telephone”, Elec. Rev. & West. Electrician, vol. 59, no. 20, pp. 972–974, 1911.
[41] A. E. Evenson, The Telephone Patent Conspiracy of 1876. Jefferson, NC, USA: McFarland, 2000.
[42] C. Beauchamp, “Who invented the telephone?: lawyers, patents, and the judgments of history”, Technology & Culture, vol. 51, no. 4, pp. 854–878, 2010.
[43] S. Shulman, The Telephone Gambit. New York: W. W. Norton & Company, 2008.
[44] R. O. Meyer and E. S. Grosvenor, “Did Alexander Graham Bell steal the telephone patent?”, American Heritage, vol. 58, no. 4, p. 52, 2008.
[45] A. G. Bell, “Experiments made by Alexander Graham Bell”, Bell Notebooks Pages, vol. I, p. 85, 1876.
[46] F. De Land, “Notes on development of telephone service. II”, The Popular Science Monthly, vol. 69, no. 3, pp. 490–501, 1906.
[47] K. MacDonald, “Innovation in Cambridge – First Phone Call”, Cambridge Historical Society, 2002 [Online]. Available: http://www.cambridgehistory.org/discover/innovation/First%20Phone%20Call.html
[48] S. E. McMaster, The Telecommunication Industry. Greenwood Press, 2002.
[49] J. Brooks, Telephone: The First Hundred Years. New York: Harper & Row, 1976, pp. 40–41.
[50] Telephone History, Bell Homestead National Historic Site, Brantford, ON, Canada [Online]. Available: http://www.bellhomestead.ca
[51] Telephone Instruments 1877–1900, Illinois Bell’s Telephony Museum in Chicago, IL, USA [Online]. Available: http://www.telephonymuseum.com/telephones.htm
[52] Worlds First Long Distance Telephone Line in French Corral, California Office of Historic Preservation, California State Parks, CA, USA, 1937.
[53] Nevada County, California Reformation Prayer Network, Western Region, Live Oak, CA, USA.
[54] Worlds First Long Distance Telephone Line 1878, Nevada County Historical Landmarks Commission, Nevada City, CA, USA.
[55] C. Wolff, “The Ridge Telephone Company and the California Electric Works CD 130.1 Cobalt Blue Insulator”, March 13, 2007 [Online]. Available: http://www.insulators.info/articles/ridge telephone.htm
[56] W. Preece, Hand-written notes by Sir William Preece from 1877 for Thomas Edison’s newly invented “Speaking Telegraph”, The IET Archives [Online]. Available: http://www.theiet.org/resources/ library/archives/featured/edison.cfm
[57] L. B. Firman, “Manual Service Exchanges: Multiple switch boards for Telephone Exchanges”, U.S. Patent no. 252576, Jan. 1882.
[58] T. Petruzzellis, Telephone Projects for Evil Genius. New York: McGraw-Hill, 2008.
[59] I. N. McFee, Famous Americans for Young Readers: The Story of Thomas A Edison. New York: Barse & Hopkins, 1922.
[60] T. Falzons Collection, Historic Butter Stamp Telephones, Australian Telephone Collectors Society (ATCS) Newsletter, July 2009 [Online]. Available: http://www.telephonecollecting.org/Newsletter/July09.pdf
[61] J. K. La Rue, Early Telephone Apparatus, John K. La Rue’s (JKL) Museum of Telephony, Dedicated to Preserving Telephony [Online]. Available: http://jklmuseum.com
[62] Early Telephones, The Museum of Technology, Museum Libraries and Archives (MLA), Cambridge, UK, 2007.
[63] S. N. D. North, Telephones and Telegraphs 1902, Department of Commerce Labor, US Bureau of the Census, Special Reports Government Printing Office, Washington, WA, USA, 1906.
[64] Invention the Telephone, Intellectual Property of American Telephone and Telegraph Company (AT&T), 2014.
[65] S. Adams and O. R. Butler, Manufacturing the Future: A History of Western Electric. New York: Cambridge University Press, 1999.
[66] A. B. Iardella, “Western Electric and Bell System – A Survey of Service”, Western Electric Company, New York, NY, USA, 1964.
[67] R. Blodgett, Timeless Values, Enduring Innovation: The Graybar Story. Old Saybrook, CT, USA: Greenwich Publishing Group, 2009.
[68] G. Adair, Thomas Alva Edison: Inventing the Electric Age. New York: Oxford University Press, 1996, pp. 59–65.
[69] W. S. Pretzer, Working at Inventing: Thomas A. Edison and the Menlo Park Experience. Baltimore, Maryland, USA: The Johns Hopkins University Press, 2002.
[70] G. M. Phelps, “Phelp’s Crown Series of Telephones”, U.S. Patent no. 218684, Aug. 19, 1879.
[71] W. Lemstra, “Innovation and landscape in telecommunication industry – the paradigm shifts”, in Proc. 2nd Int. Conf. Compet. Regul. in Netw. Industry, Brussels, Belgium, 2009, pp. 5–12.
[72] L. Smith, “First Commercial Telephone Exchange – Today in History: January 28”, New Haven – National Historic Landmarks, New Haven, New Haven County [Online]. Available: http://connecticuthistory.org/the-first-commercial-telephoneexchange-today-in-history/
[73] R. Burlingame, Engines of Democracy. New York: Arno Press, 1976 (Reprint Edition, Ed. Charles Scribners Sons 1940, Reprinted from copy available in Newark Public Library, USA).
[74] F. Deland, “Notes on the development of telephone service”, The Popular Science Monthly, vol. 70, pp. 229–232, 1907.
[75] V. Green, Race on the Line: Gender, Labor, and Technology in the Bell System, 1880.1980, 1st ed. Durham, NC, USA: Duke University Press Books, 2001.
[76] R. J. Chapuis and A. E. Joel, 100 Years of Telephone Switching, 2nd ed. Amsterdam: IOS Press, 2003, pp. 48–49.
[77] K. D. Peterson, Business Telecom Systems: A Guide to a Choosing Best Technologies and Services. New York: CMP Books, 2000, pp. 23–24.
[78] J. Cooley, “Viral Triggers: Telephony”, Viral Networking Working Group, MIT Communications Futures Program, CFP Bi-Annual Meeting, MIT, Cambridge, MA, USA, Jan 25–27, 2005.
[79] The Telephone offices: San Francisco Region Central offices [Online]. Available: http://www.thecentraloffice.com/calif/SFO/San Francisco.htm
[80] C. Reynolds, Albany Chronicles, A History of the City Arranged Chronologically, from the Earliest Settlement to the Present Time; Illustrated with Many Historical Pictures of Rarity and Reproductions of the Robert C. Pruyn Collection of the Mayors of Albany, Owned By the Albany Institute and Historical and Art Society. J. B. Lyon Company, Albany, NY, USA, 1906, pp. 56–57.
[81] History: AT&T Federal Internet Law and Policy – An Educational Project, Cybertelecom, 1997 [Online]. Available: http://www.cybertelecom.org/notes/att.htm
[82] C. H. Sterling, P. W. Bernt, and M. B. H. Weiss, Shaping American Telecommunications: A History of Technology, Policy, and Economics. Mahwah, NJ, USA: Lawrence Erlbaum Associates Publishers, 2006.
[83] K. B. Miller et al., Encyclopedia of Telephony and Telegraphy. Chicago American School of Correspondence, St. Lansing, IL, USA, 1919.
[84] J. Gibson (Ed.), Mobile Communications Handbook. Boca Raton, FL, USA: CRC Press/IEEE Press, 1996.
[85] A. Stone, Public Service Liberalism – Telecommunication and Transition in Public Policy. Princeton, NJ, USA: Princeton University Press, 1991.
[86] The Bell – Western Union, Patent Agreement of 1879: ECCH the Case for Learning, INSEAD, Fountainbleau, France, 2005.
[87] B. Estreich, “Emile Berliner” [Online]. Available: http://telephonecollecting.org/berliner.pdf
[88] E. Berliner, “The improved gramophone”, Trans. American Instit. of Electr. Engin., vol. 8, no. 1, pp. 19–30, 1891.
[89] Edison vs. Blake vs. Voelker vs. Irvin, Telephone Interface, Voelker’s Specifications and Papers, Statements of Francis Blake Jr (Jul. 1878), Thomas A. Edison (Sep. 29, 1879), William I. Voelker (Nov. 1879), J. H. Irvin (Dec. 18, 1879), United Patent Office, IEEE Global History Network [Online]. Available: http://ieeeghn.org
[90] E. Hall, Francis Blake: An Inventor’s Life (1850–1913). Boston, MA: Massachusetts Historical Society, 2005.
[91] F. Blake, Speaking Telephone”, Patent no. 250126, United States Patent Office, 1881.
[92] M. Martin, “Hello, Central?” – Gender Technology and Culture in the formation of Telephone Systems. Montreal, Quebec, Canada: McGill Queen’s University Press, 1991, pp. 18–20.
[93] W. J. Hammer, “An automatic telephone operator”, Trans. American Instit. of Electr. Engin., vol. 21, pp. 31–54, 1903.
[94] W. D. Lockwood, “Evolution of telephone switchboard”, Trans. American Instit. of Electr. Engin., vol. 21, pp. 3–30, 1903.
[95] C. M. Maxfield and A. Brown, An Illustrated History of Electronics and Computing, 2nd ed. Oxford, United Kingdom: Newnes Press, 2003.
[96] F. B. Jewett, Biographical Memoir of John Joseph Carty 1861– 1932. National Academy of Sciences of the United States of America Biographical Memoirs, Volume XVIII, Fourth Memoirs, 1936 [Online]. Available: http://www.nasonline.org.
[97] L. B. Firman, “Multiple Switchboard for Telephone Exchanges”, Western Electrical Manufacturing Company, U.S. Patent no. 252576, Jan. 1882.
[98] “The Communications Era (1879–1905) – Extending Man’s Voice byWire and Radio” [Online]. Available: http://customers.hbci.com/∼wenonah/history/edpart3.htm.
[99] Bicentennial issue of Electronic Design for engineers and engineering managers, vol. 24, no. 4, Feb. 16, 1976.
[100] J. Race, “Old telephones: how to repair and rebuild them”, Technical Notes, Cambridge Electronics Laboratories, Somerville, MA, USA, 2001.
[101] D. Linn, R. Larese, and J. Pan, “E&M Signaling”, White Paper, FAE Telecom, Acton, MA, USA [Online]. Available: www.faetelecom.com
[102] “Principles of Electricity applied to Telephone and Telegraph Work”, Bell Training Course Material, American Telephone and Telegraph Company, January, 1953 [Online]. Available: http://wedophones.com/TheBellSystem/pdf/attbook.pdf
[103] R. MacDougall, “The Telephone on Main Street: Utility Regulation in the United States and Canada before 1900”, Business and Economic History, vol. 4, 2006 [Online]. Available: http://www.thebhc.org/sites/default/files/macdougall.pdf
[104] H. Schulzrinne, “Request for Comments 3966 (RFC-3966)”, Columbia University Network Working Group, Dec. 2004 [Online]. Available: http://www.ietf.org/rfc/rfc3966.txt
[105] J. E. Brittain, “The introduction of the loading coils: George A. Campbell and Michael I. Pupin”, Technol. & Culture, vol. 11, no. 1, pp. 35–57, 1970.
[106] J. E. Brittain, “Amazing biography of Michael I. Pupin”, IEEE Industry Appl. Mag., no. 1, Jan.-Feb., 2006.
[107] H. F. Campbell, “Metallic Circuit”, Patent no. 411137, United States Patent Office, Sept. 1889.
[108] T. Shaw and W. Fondiller, “Developments and applications of loading coils for telephone circuits”, Trans. American Instit. of Electr. Engin., vol. 45 , no. 3, pp. 291–292, 1926.
[109] Almon B. Strowger 1839-1902 (Inventor), Kansas Sesquicentennial, 150 Years and counting Science in Kansas, Kansapdeia, Kansas Historical Society, Ad Astra Kansas Initiative, 2010 [Online]. Available: http://www.adastra-ks.org/150scientists/150scientists Oct 3.pdf
[110] R. B. Hill, “Early years of the Strowger system”, Bell Lab. Record, vol. 31, no. 3, pp. 95–103, 1953.
[111] R. B. Hill, “Early work on dial telephone systems”, Bell Lab. Record, no. 1, pp. 22–29, 1931.
[112] S. J. Bigelow, J. J. Carr, and S. Winder, Understanding Telephone Electronics, 4thed. Oxford, United Kingdom: Newnes, 2001.
[113] P. J. Povey and R. A. Earl, Vintage Telephones of the World. London: Peter Peregrinus Ltd., 1988.
[114] “Alexander Graham Bell Speaking on the Phone, 1892”, Gilbert H. Grosvenor Collection of Photographs, Prints and Photographs Division, Library of Congress, 1892.
[115] H. H. Nance, “Some very long telephone circuits of the Bell system”, Bell System Technical J., vol. 3, no. 3, pp. 495-507, 1924.
[116] A. Sarlemijn and P. Kroes, Between Science and Technology: Proceedings of the International Conference Between Science and Technology, Eindhoven University of Technology, The Netherlands, 29-30 June 1989. Amsterdam: North-Holland, 1990.
[117] J. J. Pilliod, “Transcontinental telephone lines”, Bell System Technical J., vol. 18, no. 1, pp. 235–245, 1939.
[118] R. B. Hill, “Early work of dial telephone system”, Bell Lab. Record, vol. 31, no. 1, pp. 22–29, 1953.
[119] E. Lindquist, The invention and development of the dial telephone: the contribution of three Lindsborg inventors”, Kansas Historical Quarterlies, vol. 23, no. 1, pp. 1–8, 1957.
[120] M. Csele, “Telephone Switches”, Niagara College (US), July 22, 2014 [Online]. Available: http://192.197.62.35/staff/mcsele/ TelephoneSwitch.html
[121] J. H. Stevens, “Basic Relay Circuits” [Online]. Available: http://www.kadiak.org/tel/index.html
[122] “Switches, PBX’s, and Central Offices”, Survey of Telephone Switching, The Pacific Telephone and Telegraph Company, 1956 [Online]. Available: http://www.telephonetribute.com/switches.html
[123] “Attachments to Public Switched Telephone Network (PSTN); General technical requirements for equipment connected to an analogue subscriber interface in the PSTN; Chapter 1: General”, series EN 300 001 v1.5.1 (1998-10), European Telecommunications Standards Institute, Jan. 1997 [Online]. Available: http://www.etsi.org
[124] J. Bathgate, “Introduction to Strowger”, The Dean Forest Railway Telecoms, Norchard Centre, Lydney, Forest of Dean, Gloucestershire, no. 131, UK, Jan. 2008 [Online]. Available: http://www.dfrtelecoms.org.uk/pdf/basicex.pdf
[125] T. Viswanathan, Telecommunication Switching Systems and Networks. Delhi, India: Prentice Hall of India, 2004, pp. 40–43.
[126] N. Wilkinson, Next Generation Network Services. Chichester, UK: Wiley, 2002.
[127] I. Vogelsang and G. Woroch, “Local telephone service: a complex dance of technology, regulation and competition”, in Industry Studies, 2nd ed., L. L. Deutsch, Ed. New York: M. E. Scharpe, 1998 [Online]. Available: http://eml.berkeley.edu/∼woroch/dance.pdf
[128] A. Lebedev, “A Short History of Telephone Numbers” (Mandership project, graphic and industrial design, interface engineering, typography, semiotics, and visualization, since 1997), Art Lebedev Studio, New York, Moscow, Kiev, June 18, 2002 [Online]. Available: http://www.artlebedev.com/mandership/91
[129] A. B. Clark and H. S. Osborne, “Long distance telephone circuits in cable”, Bell System Technical J., vol. 11, no. 4, pp. 520–545, 1932.
[130] R. Juch, “AT&T Long Lines”, The Bell System Unit For Nationwide and Worldwide Communications, 1969 [Online]. Available: http://www.beatriceco.com/bti/porticus/bell/longlines.html
[131] R. MacDougall, “Long lines: AT&T, long distance telephony and corporate control”, Business and Economic History, vol. 3, 2005 [Online]. Available: http://www.thebhc.org/sites/default/files/macdougall 0.pdf
[132] L. Carter et al., “About Submarine Telecommunication Cables”, International Cable Protection Committee Ltd, Lymington, United Kingdom, Oct. 2011 [Online]. Available: https://www.iscpc.org/documents/?id=132
[133] “1927: Transoceanic Telephone Service” [Online]. Available: http://www.corp.att.com/attlabs/reputation/timeline/27atlan.html
[134] “History of Telecommunications”, CNES – Information Systems Directorate, Toulouse, France [Online]. Available: https://cnes.fr/en/web/CNES-en/1105-history-oftelecommunications.php
[135] B. Burns, First Submarine Transatlantic Telephone Cable System TAT-1, FTL Design [Online]. Available: http://atlantic-cable.com/Cables/1956TAT-1/
[136] E. C. Wente, “The condenser transmitter as a uniformly sensitive instrument for the absolute measurement of sound intensity”, Phys. Rev., vol. 10, no. 1, pp. 39–63, 1917.
[137] E. C. Wente, “The sensitivity and precision of the electrostatic transmitter for measuring sound densities”, Phys. Rev., vol. 19, no. 5, pp. 498–503, 1922.
[138] E. C. Wente, “Contributions of telephone research to sound pictures”, AT&T Archives, Bell Telephone Laboratories, New York, Oct. 1935.
[139] Federal Internet Law and Policy – An Educational Project, Cybertelecom, 1997 [Online]. Available: http://www.cybertelecom.org/notes/telephone.htm
[140] G. William and A. Drummer, Electronic Inventions And Discoveries: Electronics From Its Earliest Beginnings To The Present Day. Boca Raton, FL: CRC Press, 1997.
[141] P. J. Covey, “The Telephone and the Exchange”, Post Office Publication, pp. 75–84, 1917.
[142] C.-F. Helgesson, “The history of Eriksson: The crossbar switch from concept to success”, Ericsson [Online]. Available: http://www.ericssonhistory.com/products/the-switches/Thecrossbar-switch—from-concept-to-success/
[143] P. Walker, “Crossbar Switching Systems”, Telecommunication Heritage Group for preservation and collection of the heritage of communications, London, UK [Online]. Available: http://www.thg.org.uk/index.php/telecoms/115-crossbar-switching
[144] “Swedish Telecom-Company History”, Funding Universe, Farsta, Sweden [Online]. Available: http://www.fundinguniverse.com/company-histories/swedishtelecom-history/
[145] R. L. Freeman, Fundamentals of Telecommunications, 3rd ed. Hoboken, NJ, USA: Wiley, 2005, pp. 73–77.

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