DSL Full Form

DSL is very important in telecommunications marketing. It is often thought to be referring to an asymmetric digital subscriber line. ADSL is one of the most frequently installed DSL technologies in places for accessing the Internet.

A wired telephone service on a same telephone line can deliver the DSL service along with it as DSL needs to use frequency bands of higher frequency for the data.

The bit rate of the DSL services ranges from 256  Kbit/second to over 100 Mbits/second downstream. Highest of one Gbit /second has been reached based on the factors of connectivity such as DSL technology, conditions of the line and service level implementation.

History of DSL

In the early 1950s it seemed impossible for the operations to be done using the conventional phone lines of 9600 bits per second. In the 1980s there was a development in techniques for broadband communications. This allowed larger limits in communication. In 1988 a patent was filed for the basic DSL concept. With the huge contributions of Joseph W Lechleider ,leader for the development of DSL allowed more or double of the capacity of the bandwidth for the symmetric DSL. This was highly beneficial and convenient for the users as they could download larger data but rarely needed to upload similar quantities. DSL had prohibitive pricing till the 1990s but it lowered slowly yet significantly as the cost of the equipment linked with the DSL deployment slump.

DSL set up

The DSL modem is usually hooked up to a phone line from the side of the customer whereas the telephone company connects to the DSLAM using the end of the line. DSLAM is used to have a large number of connections into one box.

The types of equipment used are :- 

• Exchange equipment- The exchange point the DSL am ends the DSL circuits and accumulates them. It is used to eliminate the connections and get the initial digital information
• Customer equipment- It has a DSL modem which changes the data among the digital signals which are used by the computers and the voltage signal of a perfectly suited frequency which is then used in the phone line. Modern DSL have routers and various functionality such as IP services, connections etc

Advantages and disadvantages of DSL 

The advantages of DSL are :- 

• Gives better speed when compared to normal modems
• Dual tasks of using the Internet along with the phone line can be performed
• It does not need any extra wiring and saves the labour charges for connecting the wiring. This is so because it uses the already present phone line
• The modems are provided by the service provider
• It is a cheaper option than cable connection
• You get a lot of variety while purchasing as it has many provider’s speed and prices

The disadvantages of DSL are:- 

• In remote areas there might be a problem in its availability
• It works better if the user’s device is nearer to the office of the provider
•  Although it receives data fast it is unable to transmit it due to low speed

When DSL was started it was named digital subscriber loop. 

Some of the DSL technologies are :-

•  Symmetric digital subscriber life (SDSL) – Here the bitrate is to be equal in both directions
• ISBN – It is the type of connection which provides a bitrate equivalent to the ISBN bearer. The speed of this is 144 kbits /second
• Asymmetric digital subscriber line (ASDL) – It has the bitrate in the control. Hence the bit rate is higher in One Direction play

Apart from this there are a few more types of DSL.

Conclusion 

DSL started as a new invention and the way of going forward, now DSL is one of the most used things in telecommunication and using the internet. DSL had to wait to see it’s upraise in the market. The rise was very slow as the 1950’s to the 1980 was the time which DSL took off in the market. DSL was very important for providing us with the initial stages of the Internet. However with the modernisations DSL is getting replaced by fibre optic cables for providing internet service to the people.