accessnetworking-CERN.pptVIP

ACCESS NETWORKING Dr. Prakash D. Vyavahare Dept. of Electronics Telecomm.Engg. S. G. S. Inst. Of Tech. And Science, 23 Park Road, INDORE 452 003 pvyavahare@ prakash@sgsits.ac.in Introduction PSTN access ISDN access VOIP Emergence of packet switching networks BB Access Technologies ADSL Conclusions Bibliography IntroductionTelecomm. Tech. Devp. (chronology) Telecomm. With Morse code 1847-1845 First Telegraph in India (Cal.) 1852 ITU established with 20 European countries 1865 Trans-Atlantic cable (US - France) 1866 (London - Bombay) 1870 Invention of Telephone by Bell 1876 First manual exchange in India (50 lines, Cal.) 1882 Indian Telegraph Act 1885 Sir J. C. Bose transmits on wireless 1895 Marconi demonstrates wireless (UK - France) 1899 Beginning of Bell company 1903 Lee Deforest develops vaccume tube ampl. 1906 PABX 1910 Under ground cable in US 1915 Baird develops picture tube and picture tx. 1926 Hartley introduces concept of information as a measure of quantity of data in a message 1927 Marconi discovers Microwaves 1932 First co-axial cable manufactured 1936 First SPC computer (ENIAC) 1946 Transistor invented 1947 Shannon’s theorem on channel capacity 1949 Electronic switching 1955 First artificial satellite (USSR Sputnik) 1957 Kilby at TI invents IC 1958 Paul Baran of Rand Corp. proposes packet switching 1960 STD in India (Kanpur - Lucknow) 1960 Paging system, Telstar satellite 1962 ARPANET using packet switching (TCP/IP) 1964 - 69 First email on ARPANET 1971 Cellular telephone in Tokyo 1979 IBM - PC + Microsoft - DOS 1981 Portable cellular (Motorola) 1984 GSM in 13 European countries 1988 Tim Burner Lee at CERN proposes Hyper-text info. System (Birth of WWW) 1990 Digital mobile network in USA 1993 Indian Telecom. Policy opens for private sec. 1994 Internet service launched in India 1995 Telecomm. Reg. Authority of India set-up 1997 GMPCS (Iridium) s