When the internet was first made available to the common man, the data transfer speeds were not so high. The internet was generally accessed by users through the plain old telephone cables using a dial up connection even after a few years post introduction. The connections were very slow because of the inherent signal carrying capabilities of the copper cables and the modems during those days were different too.

Another problem during those days was of the voice signals of the telephone clashing with the data signals of the internet and they used to disturb each other, often leading to data loss or even loss of connection. Apart from this one could not use the telephone and the internet simultaneously. We shall soon find out how the advent of modern technology and advances in the principles of modem technology helped circumvent these problems.

A measly 56kbps was the highest speeds available during those days. Nowadays one generally accepts speeds lower than 1mbps as very slow and one can find connections where the transfer rate is as high as 1gbps. The broadband internet connection that we get nowadays comes to us either through the cable by which we receive our TV signals or they are supplied to us through a separate cable by our internet service provider.

This technology is called DSL or direct subscriber line. For making the DSL system work, the subscriber needs to have an ethernet card on their PC and they also need to install a DSL modem. Subscribers can receive and send data and also browse the internet at high speeds over the plain old telephone line with DSL technology. Nowadays the data signals of the internet are transmitted on a different frequency and the voice signal of the telephone is transmitted on yet another frequency.

The splitter at the user’s end splits the incoming signals into two parts and sends the data signals to the computer and the voice signals to the telephone. The modems used by the high speed internet are different too. There are two different technologies employed by high speed internet. They are known as SDSL (symmetric digital subscriber line) and ADSL (asymmetric digital subscriber line). Whereas the former provides both upload and download at equal speeds, the upload speed of the latter is lower than the download speed.

Baxter Owens is a freelance writer and enjoys writing on a wide range of topics including comcast internet and high speed internet providers.

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