Thursday, February 08, 2007

Timeline of the telephone (1927-2007)

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
1946 Bell Labs develops the germanium point contact transistor
1947 December, D. H. Ring, a Bell Labs engineer, 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 cables began
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.
1970 ESS-2 electronic switch.
1970 Modular telephone cords and jacks introduced
1970 Amos Joel of Bell Labs invented the "call handoff" system for "cellular mobile communication system"
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.
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.
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
1990 Analog AMPS was superseded by Digital AMPS.
1993 Telecom Relay Service available for the disabled
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)
2004 VoIP created