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VOIP

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VOIP

This means Voice Over Internet Protocol
- Send Files
- Free video caling
- Three way calls anywhere in the world
Services that offer this
- Google
- Skype
  - What is skype ?
    - Skype is a computer program that offers a VoIP ('Voice over Internet Protocol') service. This lets you make calls to people all over the world via your computers or telephone and have text chats. Calls between computers are usually free, and other Skype calls are generally inexpensive.
  - How Skype works ?
    - 1 ) You speak into a microphone that is connected to a sound card
    - 2) The sound card has an 'Analogue-to-Digital converter' that translates your speech into a digital stream
    - 3) That data is given a destination address and off it goes like any other data stream.
    - 4) The receiving computer has the right VOIP software to convert the incoming data back into speech
  - Benifits of Skype ?
    - VOIP service company such as Skype. They may offer a free service if you call other subscribers
    - At its most basic the system is essentially free as long as you have an Internet connection
  - Limitation of Skype ?
    - Both ends have to have the right software and hardware to speak to one another
    - It uses packet-switching so if packets get dropped along the way then voice quality drops
- Facebook
- MSN
- Face Time
- Ameagle