Originally, a telecommunication software system was developed for voice communication. This was known as Public Switch Telephone Network (PSTN). But in today’s times, telecommunication includes all kinds of medium such as voice, communication over a copper wire, video and data, optical fibres as well as wireless medium.
Now, with the world being introduced to the internet, the number of computers each day that are getting connected to each other, keeps increasing. Due to the internet, there has been a significant increase in the complexity of the system of telecommunication software. Now all of these systems can be divided into various categories, depending on the type of information that is carried by each medium. Based on this categorisation, these communication systems can be divided into distribution networks, MAN (metro area networks), WAN (wide area networks) and long haul point-to-point links.
Here is a look at each one of them:
Public Switched Telephone Network (PSTN)
This is a network that connects billions of users all over the world with the use of switches, routers and some dedicated connections for the service. Originally, this service was designed to carry only voice data. But now, with the development of technology, these services can carry digitalised data information as well. Computers can be connected to the PSTN network with the help of a modem. These modems allow computers to receive, as well as send, digital data information on the PSTN network, coupled with enhanced digital services such as DSL.
Cable TV Systems
The biggest player for television broadcasting is still CATV. But now, CATV is facing stiff competition from satellite TVs and DSL videos on demand. CATV providers have now entered into the digitalised data communication market as well as VoIP services.
With the advent of modern Telecommunication Software Systems, all the information that is transmitted, is in a digital form. These digital networks can be categorised based on factors such as switching technology, network technology and the protocol of communications. The modern networks make use of switching technologies, which can be categorised as packet switching, or circuit switching. Circuit switching is basically used for voice networks but it is not very efficient. Packet switching is used to route data along the path that has the least traffic. It helps in providing a virtual connection.
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