Below is a Timeline of the telephone that covers important dates in the history of the telephone. The pre-history and early history of the telephone is the history of telephonic technology that produced instruments to transfer information through a medium, electrically or mechanically. ...

1849 to 1875

Antonio Meucci

• 1849 Antonio Meucci demonstrates a communicating device to individuals in Havana. (It is disputed if this is an electric telephone, but is said to involve direct transmission into the body.)
• 1854 Charles Bourseul publishes a description of a make-break telephone transmitter and receiver but does not construct a working instrument.
• 1854 Antonio Meucci demonstrates an electric voice operated device in New York, but it is not clear what kind of device he demonstrated.
• 1860 Johann Philipp Reis demonstrates a make-break transmitter after the design of Bourseul and a knitting needle receiver. Witnesses said they heard human voices being transmitted.
• 1861 The German Philipp Reis manages to transfer voice electrically over a distance of 340 feet, see Reis' telephone.
• 1864 In an attempt to give his musical automaton a voice, Innocenzo Manzetti invents the 'Speaking telegraph'. He shows no interest in patenting his device, but it is reported in newspapers.
• 1865 Meucci reads of Manzetti's invention and writes to the editors of two newspapers claiming priority and quoting his first experiment in 1849. He writes "I do not wish to deny Mr. Manzetti his invention, I only wish to observe that two thoughts could be found to contain the same discovery, and that by uniting the two ideas one can more easily reach the certainty about a thing this important." If he reads Meucci's offer of collaboration, Manzetti does not respond.
• 1871 Antonio Meucci files a patent caveat (a statement of intention to patent).
• 1872 Elisha Gray founds Western Electric Manufacturing Company.
• 1872 Prof Vanderwyde demonstrated Reis's telephone in New York.
• July 1873 Thomas Edison notes variable resistance in carbon grains due to pressure, builds a rheostat based on the principle but abandons it because of its sensitivity to vibration.
• May 1874 Gray invents electromagnet device for transmitting musical tones. Some of his receivers use a metallic diaphragm.
• December 29, 1874 Gray demonstrates his musical tones device and transmitted "familiar melodies through telegraph wire" at the Presbyterian Church in Highland Park, Illinois.
  

  

  Alexander Graham Bell
• 2 June 1875 Alexander Graham Bell transmits the sound of a plucked steel reed using electromagnet instruments.
• 1 July 1875 Bell uses a bi-directional "gallows" telephone that was able to transmit "indistinct but voicelike sounds" but not clear speech. Both the transmitter and the receiver were identical membrane electromagnet instruments.
• 1875 Thomas Edison experiments with acoustic telegraphy and in November builds an electro-dynamic receiver but does not exploit it.

Image File history File links 300px-Antonio_Meucci. ... Image File history File links 300px-Antonio_Meucci. ... Antonio Meucci. ... This article is about the capital of Cuba. ... Charles Bourseul was born in Brussels, Belgium on the 28th of April 1829, and grew up in Douai, France. ... Antonio Meucci. ... Johann Philipp Reis (January 7, 1834 – January 24, 1874), was born in Gelnhausen, Germany, as son to a poor Portuguese-Jewish baker. ... Johann Philipp Reis (January 7, 1834 -- January 24, 1874), was born in Gelnhausen, Germany, as son to a Jewish baker. ... Reis telephone, an invention by Philipp Reis by an inspiration from a French article in 1854 (by Bourseul) how to create a microphone-like devices. ... 1864 (MDCCCLXIV) was a leap year starting on Friday (see link for calendar) of the Gregorian calendar or a leap year starting on Sunday of the 12-day-slower Julian calendar. ... Please wikify (format) this article as suggested in the Guide to layout and the Manual of Style. ... 1865 (MDCCCLXV) is a common year starting on Sunday. ... Caveat, the third-person singular present subjunctive of the Latin cavere, means warning (or more literally, let him beware); it can be shorthand for Latin phrases such as Caveat lector Caveat emptor Caveat venditor More narrowly, caveat can also refer to CAVEAT, a Canadian lobby group; The Paulette Caveat about... Elisha Gray (August 2, 1835 – January 21, 1901) was an electrical engineer and is best known for his development of a telephone prototype in 1876 in Highland Park, Illinois, independently of Alexander Graham Bell. ... Company Masthead Logo Logo until circa 1969, also current logo on company web site Logo 1969-1983 Western Electric (sometimes abbreviated WE and WECo) was an American electrical engineering company, the manufacturing arm of AT&T from 1881 to 1995. ... “Edison” redirects here. ... Download high resolution version (480x624, 58 KB)Portrait of Alexander Graham Bell, ca. ... Download high resolution version (480x624, 58 KB)Portrait of Alexander Graham Bell, ca. ... is the 153rd day of the year (154th in leap years) in the Gregorian calendar. ... 1875 (MDCCCLXXV) was a common year starting on Friday (see link for calendar). ... Alexander Graham Bell (3 March 1847 - 2 August 1922) was a Scottish-born American scientist, inventor and innovator. ... is the 182nd day of the year (183rd in leap years) in the Gregorian calendar. ... 1875 (MDCCCLXXV) was a common year starting on Friday (see link for calendar). ... “Edison” redirects here. ... Acoustic telegraphy was also known as harmonic telegraphy. ...

1876 to 1878

• 11 February 1876 Elisha Gray invents liquid transmitter for use with a telephone, but does not build one.
• 14 February 1876 (about 9:30am) Gray or his lawyer brings to the Patent Office Gray's caveat for the telephone. (A caveat was like a patent application without claims to notify the patent office of an invention in process.)
• 14 February 1876 (about 11:30am) Bell's lawyer brings to the Patent Office Bell's patent application for the telephone. Bell's lawyer requested that it be registered immediately in the cash receipts blotter.
  • Two hours later Elisha Gray's caveat was registered in the cash blotter. Although his caveat was not a full application, Gray could have converted it into a patent application, but did not do so because of advice from his lawyer and involvement with acoustic telegraphy. The result was that the patent was awarded to Bell. ^[1]
• 7 March 1876 Bell's US patent 174,465 for the telephone is granted.
• 10 March 1876 Bell transmits speech "Mr. Watson, come here, I want to see you." using a liquid transmitter described in Gray's caveat and an electromagnetic receiver described in Gray's July 1875 US patent 166,095.
• 16 May 1876 Thomas Edison files first patent application for acoustic telegraphy for which US patent 182,996 was granted October 10, 1876.
• 10 August 1876 Alexander Bell makes worlds first long distance telephone call between Brantford and Paris, Ontario Canada.
• October 1876 Thomas Edison tests his first carbon microphone.
• 20 January 1877 Edison "first succeeded in transmitting over wires many articulated sentences" using carbon granules as a pressure sensitive variable resistance under the pressure of a diaphragm (Josephson, p143).
• 30 January 1877 Bell's US patent 186,787 is granted for an electro-magnetic telephone using permanent magnets, iron diaphragms, and a call bell.
• 4 March 1877 Emile Berliner invents a microphone based on "loose contact" between two metal electrodes, an improvement on the Reis telephone, and in April 1877 files a caveat of an invention in process.
• 27 April 1877 Thomas Edison files telephone patent application. The US patents (474,230, 474,231 and 474,231) were awarded to Edison in 1892 over the competing claims of Alexander Graham Bell, Emile Berliner, Elisha Gray, A E Dolbear, J W McDonagh, G B Richmond, W L W Voeker, J H Irwin and Francis Blake Jr.^[2] Edison's carbon granules transmitter and Bell's electromagnetic receiver were used, with improvements, by the Bell system for many decades thereafter (Josephson, p 146).
• 4 June 1877 Emile Berliner files telephone patent application that includes a carbon microphone transmitter.
• December 1, 1877 Western Union enters the telephone business using Thomas Edison's superior carbon microphone transmitter.
• January 1878 First North American telephone exchange opened in New Haven, Connecticut.
• 4 February 1878 Thomas Edison demonstrates telephone between Menlo Park, New York and Philadelphia, a distance of 210 km.
• 14 June 1878 The Telephone Company Ltd (Bell's Patents) registered, London. Opened in London 21 August 1879 - Europe's first telephone exchange.
• September 12, 1878 The Bell Telephone Co. sues Western Union for infringing Bell's patents.

is the 42nd day of the year in the Gregorian calendar. ... Year 1876 Pick up Sticks(MDCCCLXXVI) was a leap year starting on Saturday (link will display the full calendar) of the Gregorian Calendar (or a leap year starting on Thursday of the 12-day slower Julian calendar). ... is the 45th day of the year in the Gregorian calendar. ... Year 1876 Pick up Sticks(MDCCCLXXVI) was a leap year starting on Saturday (link will display the full calendar) of the Gregorian Calendar (or a leap year starting on Thursday of the 12-day slower Julian calendar). ... is the 45th day of the year in the Gregorian calendar. ... Year 1876 Pick up Sticks(MDCCCLXXVI) was a leap year starting on Saturday (link will display the full calendar) of the Gregorian Calendar (or a leap year starting on Thursday of the 12-day slower Julian calendar). ... Acoustic telegraphy was also known as harmonic telegraphy. ... is the 66th day of the year (67th in leap years) in the Gregorian calendar. ... Year 1876 Pick up Sticks(MDCCCLXXVI) was a leap year starting on Saturday (link will display the full calendar) of the Gregorian Calendar (or a leap year starting on Thursday of the 12-day slower Julian calendar). ... March 10 is the 69th day of the year (70th in leap years) in the Gregorian calendar. ... Year 1876 Pick up Sticks(MDCCCLXXVI) was a leap year starting on Saturday (link will display the full calendar) of the Gregorian Calendar (or a leap year starting on Thursday of the 12-day slower Julian calendar). ... May 16 is the 136th day of the year (137th in leap years) in the Gregorian calendar. ... Year 1876 Pick up Sticks(MDCCCLXXVI) was a leap year starting on Saturday (link will display the full calendar) of the Gregorian Calendar (or a leap year starting on Thursday of the 12-day slower Julian calendar). ... “Edison” redirects here. ... Acoustic telegraphy was also known as harmonic telegraphy. ... is the 222nd day of the year (223rd in leap years) in the Gregorian calendar. ... Year 1876 Pick up Sticks(MDCCCLXXVI) was a leap year starting on Saturday (link will display the full calendar) of the Gregorian Calendar (or a leap year starting on Thursday of the 12-day slower Julian calendar). ... Year 1876 Pick up Sticks(MDCCCLXXVI) was a leap year starting on Saturday (link will display the full calendar) of the Gregorian Calendar (or a leap year starting on Thursday of the 12-day slower Julian calendar). ... “Edison” redirects here. ... “Microphones” redirects here. ... January 20 is the 20th day of the year in the Gregorian calendar. ... 1877 (MDCCCLXXVII) was a common year starting on Monday (see link for calendar). ... is the 30th day of the year in the Gregorian calendar. ... 1877 (MDCCCLXXVII) was a common year starting on Monday (see link for calendar). ... is the 63rd day of the year (64th in leap years) in the Gregorian calendar. ... 1877 (MDCCCLXXVII) was a common year starting on Monday (see link for calendar). ... Emile Berliner with disc record gramophone. ... April 27 is the 117th day of the year (118th in leap years) in the Gregorian calendar, with 248 days remaining. ... 1877 (MDCCCLXXVII) was a common year starting on Monday (see link for calendar). ... “Edison” redirects here. ... 1892 (MDCCCXCII) was a leap year starting on Friday (see link for calendar). ... Alexander Graham Bell (3 March 1847 - 2 August 1922) was a Scottish-born American scientist, inventor and innovator. ... Emile Berliner with disc record gramophone. ... Elisha Gray (August 2, 1835 – January 21, 1901) was an electrical engineer and is best known for his development of a telephone prototype in 1876 in Highland Park, Illinois, independently of Alexander Graham Bell. ... is the 155th day of the year (156th in leap years) in the Gregorian calendar. ... 1877 (MDCCCLXXVII) was a common year starting on Monday (see link for calendar). ... Emile Berliner with disc record gramophone. ... is the 335th day of the year (336th in leap years) in the Gregorian calendar. ... 1877 (MDCCCLXXVII) was a common year starting on Monday (see link for calendar). ... Western Union (NYSE: WU) is a financial services and communications company based in the United States. ... “Edison” redirects here. ... 1878 (MDCCCLXXVIII) was a common year starting on Tuesday (see link for calendar). ... “New Haven” redirects here. ... is the 35th day of the year in the Gregorian calendar. ... 1878 (MDCCCLXXVIII) was a common year starting on Tuesday (see link for calendar). ... “Edison” redirects here. ... is the 165th day of the year (166th in leap years) in the Gregorian calendar. ... 1878 (MDCCCLXXVIII) was a common year starting on Tuesday (see link for calendar). ... is the 255th day of the year (256th in leap years) in the Gregorian calendar. ... 1878 (MDCCCLXXVIII) was a common year starting on Tuesday (see link for calendar). ...

1879 to 1919

• Early months of 1879 The Bell Telephone Co. is near bankruptcy and desperate to get a transmitter to equal Edison's carbon transmitter.
• 1879 Bell merges with the New England Telephone Company to form the National Bell Telephone Company.
• 1879 Francis Blake invents a carbon transmitter similar to Edison's that saves the Bell company from extinction.
• 2 August 1879 The Edison Telephone Company of London Ltd, registered. Opened in London 6 September 1879.
• 10 September 1879 Connolly and McTighe patent a "dial" telephone exchange (limited in the number of lines to the number of positions on the dial.).
• 1880 National Bell merges with others to form the American Bell Telephone Company.
• 1882 A telephone company --an American Bell affiliate-- is set up in Mexico City.
• 1885 American Telephone and Telegraph Company AT&T is formed.
• 1886 Gilliland's Automatic circuit changer is put into service between Worcester and Leicester allowing for the first Operator dialing allowing one operator to run two exchanges.
• 13 January 1887 the Government of the United States moves to annul the patent issued to Alexander Graham Bell on the grounds of fraud and misrepresentation. Bell remanded for trial.
• 1889 AT&T becomes the overall holding company for all the Bell companies.
• November 2, 1889 A. G. Smith patents a telegraph switch which provides for trunks between groups of selectors allowing for the first time, fewer trunks than there are lines, and automatic selection of an idle trunk.
• 10 March 1891 Almon Strowger patents the Strowger switch the first Automatic telephone exchange.
• 30 October 1891 The Strowger Automatic Telephone Exchange company is formed.
• 3 May 1892 Thomas Edison awarded patents for the carbon microphone against applications lodged in 1877.
• 3 November 1892 The first Strowger switch goes into operation in LaPorte, Indiana with 75 subscribers and capacity for 99.
• 27 February 1901 United States Court of Appeal declares void Emile Berliner's patent of the Bell telephone system
• 1915 Vacuum tubes used in coast-to-coast telephone circuits.
• 25 January 1915 First transcontinental telephone call, with Thomas Watson at 333 Grant Avenue in San Francisco receiving the call from Alexander Graham Bell at 15 Day Street in New York City.[1]
• 1919 AT&T installs the first dial telephones in the Bell System, in Norfolk, Virginia. The last manual telephones in the system were not converted to dial until 1978 when the last of the first bell phones were no longer made.

Year 1879 (MDCCCLXXIX) was a common year starting on Wednesday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Monday of the 12-day slower Julian calendar). ... Year 1879 (MDCCCLXXIX) was a common year starting on Wednesday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Monday of the 12-day slower Julian calendar). ... is the 214th day of the year (215th in leap years) in the Gregorian calendar. ... Year 1879 (MDCCCLXXIX) was a common year starting on Wednesday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Monday of the 12-day slower Julian calendar). ... is the 253rd day of the year (254th in leap years) in the Gregorian calendar. ... Year 1879 (MDCCCLXXIX) was a common year starting on Wednesday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Monday of the 12-day slower Julian calendar). ... Year 1882 (MDCCCLXXXII) was a common year starting on Sunday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Friday of the 12-day slower Julian calendar). ... For information regarding the American Bell Telephone Company, please see AT&T. American Bell logo American Bell was the name of the equipment sales subsidiary of AT&T formed on July 1, 1982, with sales of equipment commencing on January 1, 1983. ... Nickname: Motto: Capital en movimiento Location of Mexico City in south central Mexico Coordinates: , Country Federal entity Boroughs The 16 delegaciones Founded c. ... This article is about the current AT&T. For the 1885-2005 company, see American Telephone & Telegraph. ... This article is about the city of Worcester in England. ... Leicester city centre, looking towards the Clock Tower Leicester (pronounced ) is the largest city and unitary authority in the English East Midlands. ... January 13 is the 13th day of the year in the Gregorian calendar. ... 1887 (MDCCCLXXXVII) is a common year starting on Saturday (click on link for calendar) of the Gregorian calendar or a common year starting on Monday of the Julian calendar. ... Alexander Graham Bell (3 March 1847 - 2 August 1922) was a Scottish-born American scientist, inventor and innovator. ... is the 306th day of the year (307th in leap years) in the Gregorian calendar. ... Year 1889 (MDCCCLXXXIX) was a common year starting on Tuesday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Sunday of the 12-day slower Julian calendar). ... In telecommunication, the term trunk has the following meanings: In a communications network, a single transmission channel between two points that are switching centers or nodes, or both. ... March 10 is the 69th day of the year (70th in leap years) in the Gregorian calendar. ... Year 1891 (MDCCCXCI) was a common year starting on Thursday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Saturday of the 12-day slower Julian calendar). ... Almon Brown Strowger (1839 – May 26, 1902) gave his name to the electromechanical telephone exchange technology that his invention and patent inspired. ... Almon Brown Strowger (1839 - May 26, 1902) gave his name to the electromechanical telephone exchange technology that his invention and patent inspired. ... central office = Exchange building in the U.S. telephone exchange = Exchange building in the UK, and is also the UK name for a telephone switch, and also has a technical meaning in U.S. telecoms telephone switch is the U.S. term, but is in increasing use in technical UK... is the 303rd day of the year (304th in leap years) in the Gregorian calendar. ... Year 1891 (MDCCCXCI) was a common year starting on Thursday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Saturday of the 12-day slower Julian calendar). ... is the 123rd day of the year (124th in leap years) in the Gregorian calendar. ... 1892 (MDCCCXCII) was a leap year starting on Friday (see link for calendar). ... “Edison” redirects here. ... “Microphones” redirects here. ... 1877 (MDCCCLXXVII) was a common year starting on Monday (see link for calendar). ... is the 307th day of the year (308th in leap years) in the Gregorian calendar. ... 1892 (MDCCCXCII) was a leap year starting on Friday (see link for calendar). ... Almon Brown Strowger (1839 - May 26, 1902) gave his name to the electromechanical telephone exchange technology that his invention and patent inspired. ... This article or section does not cite its references or sources. ... is the 58th day of the year in the Gregorian calendar. ... Year 1901 (MCMI) was a common year starting on Tuesday (link will display calendar) of the Gregorian calendar (or a common year starting on Monday [1] of the 13-day-slower Julian calendar). ... The United States Courts of Appeals (or circuit courts) are the mid-level appellate courts of the United States federal court system. ... Emile Berliner with disc record gramophone. ... is the 25th day of the year in the Gregorian calendar. ... Year 1915 (MCMXV) was a common year starting on Friday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Thursday[1] of the 13-day-slower Julian calendar). ... This page is a candidate for speedy deletion. ... New York, New York and NYC redirect here. ... Motto: Crescas (Latin for, Thou shalt grow. ...

1920 to 1969

• 1927 First public trans-atlantic phone call (via radio)
• 1935 First telephone call around the world.
• 1941 Touch Tone dialing introduced for operators in Baltimore, Maryland
• 1946 National numbering plan (area codes)
• 1946 First commercial mobile phone call
  

  

  Bell Labs logo
• 1946 Bell Labs develops the germanium point contact transistor
• 1947 December, W. Rae Young and Douglas H. Ring, Bell Labs engineers, proposed hexagonal cells for mobile phones.
• 1948 Phil Porter, a Bell Labs engineer, proposed that cell towers be at the corners of the hexagons rather than the centers and have directional antennas pointing in 3 directions.
• 1951 Direct Distance Dialing (DDD) first offered at Englewood, New Jersey, to 11 selected major cities across the United States; this service grew rapidly across major cities during the 1950s
• 1955 The laying of trans-Atlantic cable TAT-1 began - 36 circuits, later increased to 48 by reducing the bandwidth from 4 KHz to 3 KHz
• 1958 Modems used for direct connection via voice phone lines
• 1960 ESS-1
• 1961 Touch-tone released to public
• 1962 T-1 service in Skokie, Illinois
• 1960's Bell Labs developed the electronics for cellular phones
• 1965 First geosynchronous communications satellite - 240 circuits or one TV signal

Dual-tone multi-frequency (DTMF), also known as Touch Tone is used for telephone signaling over the line in the voice frequency band to the call switching center. ... Baltimore redirects here. ... Year 1946 (MCMXLVI) was a common year starting on Tuesday (link will display full 1946 calendar) of the Gregorian calendar. ... A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ... Image File history File links Size of this preview: 800 × 151 pixelsFull resolution (805 × 152 pixel, file size: 73 KB, MIME type: image/png) Bell Labs logo, 1969-1983 This is a logo of an organization, item, or event, and is protected by copyright and/or trademark. ... Image File history File links Size of this preview: 800 × 151 pixelsFull resolution (805 × 152 pixel, file size: 73 KB, MIME type: image/png) Bell Labs logo, 1969-1983 This is a logo of an organization, item, or event, and is protected by copyright and/or trademark. ... Bell Laboratories (also known as Bell Labs and formerly known as AT&T Bell Laboratories and Bell Telephone Laboratories) was the main research and development arm of the United States Bell System. ... General Name, Symbol, Number germanium, Ge, 32 Chemical series metalloids Group, Period, Block 14, 4, p Appearance grayish white Standard atomic weight 72. ... W. Rae Young, Jr. ... Douglas H. Ring (born March 28, 1907 in Montana, died September 8, 2000 in Red Bank, New Jersey) was one of the Bell Labs engineers that invented the cell phone. ... Bell Laboratories (also known as Bell Labs and formerly known as AT&T Bell Laboratories and Bell Telephone Laboratories) was the main research and development arm of the United States Bell System. ... Direct Distance Dialing was a telephony innovation that enabled subscribers to call long distance numbers (Those outside the local exchange) without having to go though an operator. ... Map highlighting Englewoods location within Bergen County. ... TAT-1 (Transatlantic No. ... For other uses, see Modem (disambiguation). ... In telecommunications, an electronic switching system (ESS) is: A telephone exchange based on the principles of time-division multiplexing of digitized analog signals. ... Year 1961 (MCMLXI) was a common year starting on Sunday (link will display full calendar) of the Gregorian calendar. ... Dual-tone multi-frequency (DTMF), also known as Touch Tone® is used for telephone signaling over the line in the voice frequency band to the call switching center. ... For the guitar distortion pedal, see BOSS DS-1. ... For the film of the same name, see Skokie (Movie). ... Bell Laboratories (also known as Bell Labs and formerly known as AT&T Bell Laboratories and Bell Telephone Laboratories) was the main research and development arm of the United States Bell System. ... INTELSAT I Early Bird Intelsat I (nicknamed Early Bird for the proverb The early bird catches the worm) was the first commercial communications satellite to be placed in geosynchronous orbit, on April 6, 1965. ...

1970 to 2007

• 1970 ESS-2 electronic switch.
• 1970 Modular telephone cords and jacks introduced
• 1970 Amos E. Joel, Jr. of Bell Labs invented the "call handoff" system for "cellular mobile communication system" (patent granted 1972)
• 1971 AT&T submitted a proposal for cellular phone service to the FCC.
• 1973 April 3, Motorola employee Martin Cooper placed the first hand-held cell phone call to rival Joel Engel, head of research at AT&T's Bell Labs, while talking on the first Motorola DynaTAC prototype.
• 1973 Packet switched voice connections over ARPANET with Network Voice Protocol (NVP)
• 1975 Last manual telephone switchboard in Maine is retired
• 1978 Bell Labs launched a trial of the first commercial cellular network in Chicago using AMPS
• 1979 VoIP - NVP running on top of early versions of IP
• 1981 The worlds first fully-automatic mobile phone system NMT is started in Sweden and Norway.
• 1981 BT introduces the British Telephone Sockets system.
• 1982 FCC approved AT&T proposal for Advanced Mobile Phone Service (AMPS) and allocated frequencies in the 824-894 MHz band.
• 1982 Caller ID patented by Carolyn Doughty, Bell Labs
• 1987 ADSL introduced
• 1988 First transatlantic fiber optic cable TAT-8, carrying 40,000 circuits
• 1990 Analog AMPS was superseded by Digital AMPS.
• 1991 The GSM mobile phone network is started in Finland.
• 1993 Telecom Relay Service available for the disabled
• 1994 two new members of the bell family were born on december 15th
• 1995 Caller ID implemented nationally in USA
• 2002 Antonio Meucci was recognized as the first inventor of the telephone by the United States House of Representatives, in House Resolution 269, dated 11 June. The Parliament of Canada retaliated by passing a bill recognizing Canadian immigrant Alexander Graham Bell as the only inventor of the telephone.
• 2005 Mink, Louisiana gets phone service (Last in the USA)

In telecommunications, an electronic switching system (ESS) is: A telephone exchange based on the principles of time-division multiplexing of digitized analog signals. ... Amos Edward Joel, Jr. ... Bell Laboratories (also known as Bell Labs and formerly known as AT&T Bell Laboratories and Bell Telephone Laboratories) was the main research and development arm of the United States Bell System. ... The abbreviation FCC can refer to: Face-centered cubic (usually fcc), a crystallographic structure Federal Communications Commission, a US government organization Farm Credit Corporation/Farm Credit Canada, a Canadian government organization Families with Children from China, an adoption support organization Florida Christian College, a college in central Florida Fresno City... Motorola Inc. ... Martin Cooper is invited to join COMPUTEX Taipei 2007 e21 Forum. ... This article is about the current AT&T. For the 1885-2005 company, see American Telephone & Telegraph. ... Bell Laboratories (also known as Bell Labs and formerly known as AT&T Bell Laboratories and Bell Telephone Laboratories) was the main research and development arm of the United States Bell System. ... The Motorola DynaTAC 8000X was the worlds first mobile phone to receive FCC acceptance in 1983. ... ARPANET logical map, March 1977. ... The Network Voice Protocol (NVP) was a pioneering computer network protocol for transporting human speech over packetized communications networks. ... Official language(s) None (English and French de facto) Capital Augusta Largest city Portland Area  Ranked 39th  - Total 33,414 sq mi (86,542 km²)  - Width 210 miles (338 km)  - Length 320 miles (515 km)  - % water 13. ... Advanced Mobile Phone System or AMPS is the analog mobile phone system standard, introduced in the Americas during the early 1980s. ... IP Telephony, also called Internet telephony, is the technology that makes it possible to have a telephone conversation over the Internet or a dedicated Internet Protocol (IP) network instead of dedicated voice transmission lines. ... The Internet Protocol (IP) is a data-oriented protocol used for communicating data across a packet-switched internetwork. ... For other meanings of the abbreviation, see: NMT. NMT (Nordisk MobilTelefoni or Nordiska MobilTelefoni-gruppen, Nordic Mobile Telephone in English) is a mobile phone system that was specified by the Nordic telecommunications administrations (PTTs) starting in 1970, and opened for service in 1981 as a response to the increasing congestion... British Telecom introduced a plug and socket system to allow subscribers to connect telephones on the 19th November 1981. ... Advanced Mobile Phone System or AMPS is the analog mobile phone system standard, introduced in the Americas during the early 1980s. ... For the protein involved in the synthesis of major histocompatibility complex II, see CLIP (protein). ... Bell Laboratories (also known as Bell Labs and formerly known as AT&T Bell Laboratories and Bell Telephone Laboratories) was the main research and development arm of the United States Bell System. ... Asymmetric Digital Subscriber Line (ADSL) is a form of DSL, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. ... TAT-8 was AT&Ts 8th transatlantic telephone cable, in operation from 1988, initially carrying 40,000 telephone circuits (simultaneous calls) between USA and France. ... IS-54 and IS-136 are second-generation (2G) mobile phone systems, known as Digital AMPS (D-AMPS). ... Global System for Mobile communications (GSM: originally from Groupe Spécial Mobile) is the most popular standard for mobile phones in the world. ... A relay Communication Assistant (CA) wears a headset, sitting in front of a keyboard and screen. ... For the protein involved in the synthesis of major histocompatibility complex II, see CLIP (protein). ... Antonio Meucci. ... Type Bicameral Speaker of the House of Representatives House Majority Leader Nancy Pelosi, (D) since January 4, 2007 Steny Hoyer, (D) since January 4, 2007 House Minority Leader John Boehner, (R) since January 4, 2007 Members 435 plus 4 Delegates and 1 Resident Commissioner Political groups Democratic Party Republican Party... Regions Political culture Foreign relations Other countries Atlas  Politics Portal      The Senate Chamber of Parliament Hill in Ottawa. ...

See also

• Invention of the telephone
• History of the telephone
• Telephone
• History of mobile phones

Bell speaking into prototype model of the telephone The history of the invention of the telephone is a confusing claim and counterclaim, further worsened by the lawsuits which hoped to resolve the patent claims of individuals. ... The pre-history and early history of the telephone is the history of telephonic technology that produced instruments to transfer information through a medium, electrically or mechanically. ... For other uses, see Telephone (disambiguation). ... The history of mobile phones can be traced back to devices that are unrecognizable in todays GSM dominated world. ...

Notes

1. ^ Hounshell, David A. 1975. Elisha Gray and the Telephone: On the Disadvantages of Being an Expert. Technology and Culture 16 (2):133-161.
2. ^ Edison, Thomas A. 1880. The Speaking Telephone Interferences, Evidence for Thomas A. Edison. Vol. 1 [jpg image], [cited 21 April 2006]. Available from http://edison.rutgers.edu/singldoc.htm.

References

• Thompson, Sylvanus P. (1883), Philipp Reis, Inventor of the Telephone, London: E. & F. N. Spon, 1883.
• Coe, Lewis (1995), The Telephone and Its Several Inventors: A History, McFarland, North Carolina, 1995. ISBN 0-7864-0138-9
• Baker, Burton H. (2000), The Gray Matter: The Forgotten Story of the Telephone, Telepress, St. Joseph, MI, 2000. ISBN 0-615-11329-X
• Josephson, Matthew (1992), Edison: A Biography, Wiley, ISBN 0-471-54806-5
• Bruce, Robert V. (1990), Bell: Alexander Bell and the Conquest of Solitude, Cornell University Press, 1990. ISBN 0-80149691-8
• Heroes of the Telegraph by John Munro, available at Project Gutenberg.
• American Treasures of the Library of Congress, Alexander Graham Bell - Lab notebook I, pages 40-41 (image 22)
• Farley, Tom (2007), "The Cell-Phone Revolution", Invention & Technology, Winter 2007, vol. 22:3, pages 8-19.