Dial Up

Since early 1990s dial up connection structure has been used for internet access. This engages use of a computer linked to a telephone line via a modem at the user end, and a modem linked to the telephone line at the dial up isp’s end. The user dials into the internet service provider’s node; on achieving this modem-to-modem connection, the call gets routed to the internet. The user can, then, search the web sites and download (or upload) as needed. Modem in this case will adjust analog carrier signal to encode digital information for sending through the telephone lines.

Dial up needs numerous seconds to set up contact and to execute a handshake – a protocol – before data transfer can occur. Data transfer rate in a dialup connection is usually of the order of approximately 50 kbps - relatively slow when compared with today’s broadband standards. But despite of the handicap of slowness, dial up internet practice is still generally found in lots of areas all around the world.

Despite of the need of all people to have access to quicker internet service whether for business or enjoyment, internet dialup system continues because there are different reasons. Firstly, it perhaps involves the least investment from the user for lots of regions. Secondly, since telephones are accessible all around the world and internet dial up does not need any adjustment of the existing telephone network, dialup internet access could be accessible anyplace around the world. Thirdly, and most significantly, in lots of areas it might not be probable to have access to a great speed internet connection because of the low population density, poor demand and poor infrastructure. Lots of dialup isps offer free dial up connection. Like free internet dial up can still be rather expensive since the telephone call charges have to be paid for the time the internet connection is established. Free dial up internet services are extensively advertised by free dialup isps.

There is, though, an intermediary solution to this handicap of dial up structure. High speed dial up is a novel system which speeds up the internet access considerably. In this system, the dial up internet provider interjects an acceleration server at his end at which the user’s connection expires. Instead of setting up a direct data transfer among the user and the web-server from where the user has to get information, the acceleration server collects the information at great speed from the web-server on user’s behalf, so to say, and passes on to the user. High speed dialup reduces the time for searching web addresses and downloading information by 50 % in lots of cases.

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