REFERENCES
- Wikipedia, the free encyclopaedia.,"Voice over IP", http://en.wikipedia.org/wiki/VoIP, 2006, 17/3/2007
- VOIP - Voice Over Internet Protocol, Copyright � 2005, All rights reserved., Voice Over Internet Protocol , http://www.voice-over-internet.info/, 17/3/2007.
- "Frequently Asked Questions", 30/10/2006, Federal Communications Commission, Washington.,http://www.fcc.gov/voip/,17/3/2007
