Wire free Services
Posted by joellivz on July 4, 2009
Wireless does not mean sparks, noise, or a lot of switches. Wireless means communication without the use of wires other than the antenna, the ether, and ground taking the place of wires. Radio means exactly the same thing: it is the
same process. Communications by wireless waves may consist of an SOS or other messages from a ship at sea or the communication may be simply the reception of today’s top 10 music artists, or connecting to the Internet to check your email.It does not become something different in either spelling or meaning.
A simple timeline in Wireless Technologies evolution
1896 Guglielmo Marconi develops the first wireless
telegraph system
1927 First commercial radiotelephone service operated
between Britain and the US
1946 First car-based mobile telephone set up in St. Louis,
using ‘push-to-talk’ technology
1948 Claude Shannon publishes two benchmark papers on
Information Theory, containing the basis for data compression (source encoding) and error detection and correction (channel encoding)
1950 TD-2, the first terrestrial microwave
telecommunication system, installed to support
2400 telephone circuits
1950s Late in the decade, several ‘push-to-talk’ mobile
systems established in big cities for CB-radio, taxis,
police, etc.
1950s Late in the decade, the first paging access control
equipment (PACE) paging systems established
1960s Early in the decade, the Improved Mobile Telephone
System (IMTS) developed with simultaneous
transmit and receive, more channels, and greater
power
1962 The first communication satellite, Telstar, launched
into orbit
1964 The International Telecommunications Satellite
Consortium (INTELSAT) established, and in 1965
launches the Early Bird geostationary satellite
1968 Defense Advanced Research Projects Agency – US
(DARPA) selected BBN to develop the Advanced
Research Projects Agency Network (ARPANET),
the father of the modern Internet
1970s Packet switching emerges as an efficient means of data
communications, with the X.25 standard emerging
1977 The Advanced Mobile Phone System (AMPS), invented by Bell Labs, first installed in the US with
geographic regions divided into ‘cells’ (i.e. cellular telephone)
1983 January 1, TCP/IP selected as the official protocol for the ARPANET, leading to rapid growth
1990 Motorola files FCC application for permission to launch 77 (revised down to 66) low earth orbit communication satellites, known as the Iridium System (element 77 is Iridium)
1992 One-millionth host connected to the Internet, with the size now approximately doubling every year
1993 Internet Protocol version 4 (IPv4) established for reliable transmission over the Internet in conjunction with the Transport Control Protocol (TCP)
1994-5 FCC licenses the Personal Communication Services (PCS) spectrum (1.7 to 2.3GHz) for $7.7billion
1998 Ericsson, IBM, Intel, Nokia, and Toshiba announce they will join to develop Bluetooth for wireless data
exchange between handheld computers or cellular phones and stationary computers
1990s Late in the decade, Virtual Private Networks (VPNs) based on the Layer 2 Tunneling Protocol (L2TP)
and IPSEC security techniques become available
2000 802.11(b)-based networks are in popular demand
2000-1 Wired Equivalent Privacy (WEP) Security is broken. The search for greater security for 802.11(x)-based networks increases
