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The birth of Modem
Modems grew up of the need to connect teletype machines over ordinary phones lines instead of more expensive leased lines which had previously been used for current loop-based teleprinters and automated telegraphs. IBM adapted this technology to their unit record. -
Early Teletype Modems
The United States miitary expressed a need to transmit hundreds of radar images centres during the Cold War, the thumed to the telephone as a solution, using early type modems to transmit images across the country. This would eventually lead to the AT&T Digital Subset in the late 1950's -
The AT&T Digital Subset
The first commercial, mass produced computer modems, called a Digital Subset, was develop; to link SAGE computers across the United States and Canada. It could communicate at 110bits per second. -
The Bell 103 Data Phone
AT&T introduce the bell 103 data phone, which set the standard for 300 bit per second full duplex modem. -
The Hayes 80-103A
Dale Heatherington and Denis Hayes created the world's first personal computer modem, the Hayes 80-103A. -
Hayes Smartmodem
In 1981 the Hayes Smartmodem was introduce, delivering the first 300bps modem to integrate its own command set. it lso delivered a 1200bps version, representing a big step forward in internet speed. -
Lower prices
During this period internal Pc modem became such a commodity that prices plunged and vendors began to ship modems as standard components of desktop Pc's and laptops. This era saw the introduction of Winmodem. -
56K Modem
In 1996, Brend Townsend came up with the technology for the 56K Modem. Two years later, in 1998, the first widely available 56K Modem was introduce into the market. -
ISDN, ADSL & Cable
Having reached the limits of analogue technology, companies tried various new approaches to gain fater modem speed. The first alternative was all-digital phone lines(ISDN), though the cost limited their popularity. Modems that work over cable TV won a following. -
The birth of 3G
Offered aplication services including wide-areas wireless voice telephone, mobile internet access, video calls and TV, all in a mobile enviorement. -
4G introduce
It represented the fourth generation of celular wireless standards. It service was at 100Mbit per second for high mobility communications and 1Gbit per second for low mobility communications.