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use of Internet Telephony and VOIP


Good communication is essential to every organization: communication between organizations and communication between parts of a single organization (e.g. between offices in different countries).

We often have ideas or information that we wish to communicate with others, either personally, or as part of our work.

Examples of personal communication: You may want to tell your friends about a party that you are having, or you may want to let others know how about the impact of climate change.

Examples of business communication: In business, you may want to tell the world about a new product that your company has just created (this is called marketing), or you have information that you need to pass on to all of the employees in the business.

In all of these examples, IT can be used to help pass on the message.

Range of communication applications include:

  • Newsletters
  • Websites
  • Multimedia presentations
  • Music scores
  • Cartoons
  • Flyers
  • Posters

The use of mobile phones for communication

Mobile telephones allow people to be away from their workplace, yet still be contactable. This means that people can still work, even when out of the office.

Modern smart-phones can perform a wide variety of tasks:

  • Make and receive telephone calls just about anywhere
  • Send a receive SMS (short message service) messages
  • Send and receive e-mail
  • Send and receive files such as images, text documents, etc.
  • Edit documents
  • Most people would be lost without their mobile phone!

However there are some downsides to the use of mobiles:

  • Workers never get a chance to ‘switch off’ since they can always be contacted – can be stressful
  • Mobiles are easy to lose, and often contain a lot of personal and/or business information. A lost mobile could be embarrassing / damaging if the wrong people got hold of it

use of mobile phones for communication

The use of Internet Telephony and VOIP

Internet telephony, or ‘VOIP’, is becoming very popular both for personal use, and within the workplace.

Instead of using the normal telephone network (designed to carry voices using analogue signals), VOIP systems send voices through the Internet as digital data, just like any other Internet data (e.g. e-mails, files, webpages, etc.)

In other words, VOIP systems use your Internet connection to send and receive phone calls.

VOIP systems can work in several ways:

  • VOIP software can be installed on a computer. Calls are then made using a headset (headphones / microphone) or by using a special USB handset (looks just like a normal phone)
  • Special VOIP telephones can be plugged directly into the network (or can connect wirelessly using WiFi)

VOIP systems have a number of advantages over a normal telephone system:

  • No telephone line is required
  • Call costs are very low, especially for long-distance calls
  • Can include video

They also have some disadvantages:

  • Require special hardware and an Internet connection
  • Not as reliable as normal phones, so cannot be relied upon for emergency calls (911, or 999)
  • Call quality depends on the speed of the Internet connection

The most well-known public VOIP service is Skype.

(Needless to say, the traditional phone companies don’t like VOIP as it takes away their business!)

Reference – IGCSE INFO

IT is used for publicity and corporate image publications which include:

  • Business cards
  • Letter heads
  • Flyers
  • Brochures


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