The first 3G network was deployed in Japan in 2001. 2.5G networks, such as GPRS (Global Packet Radio Service) are already available in some parts of Europe.
Work has already begun on the development of fourth generation (4G) technologies in Japan.
It is to be noted that analog and digital systems, 1G and 2G, still co-exist in many areas... displayed 300 characters
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The first radiotelephone service was introduced in the US at the end of the 1940s, and was meant to connect mobile users in cars to the public fixed network. In the 1960s, a new system launched by Bell Systems, called Improved Mobile Telephone Service” (IMTS), brought many improvements like direct dialing and higher bandwidth... displayed next 300 characters
As mentioned earlier, Frame Relay is strictly a Layer 2
protocol suite, whereas X.25 provides services at Layer 3 (the network layer) as well. This enables
Frame Relay to offer higher performance and greater transmission efficiency than X...
The latter is to reflect the fact that even during times when no data are being transferred, the bandwidth is unavailable to other potential users.
GPRS originally supported (in theory) IP, PPP and X...
This includes the rise of near instant communication by e-mail, text based discussion forums, the World Wide Web. Investor speculation in new markets provided by these innovations would also lead to the inflation and collapse of the Dot-com bubble, a major market collapse...
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