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Focus on Skype

Rima Raksa

on 29 September 2012

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Transcript of VoIP

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli VoIP VOICE OVER INTERNET PROTOCOL What we can get from this technology is: send the voice through internet protocol 1876, Alexander Graham Bell HISTORY OF VOIP Some Companies Developing VoIP Advantages 2006 2011 2009 2003 2010 Oct, 2005 Janus Friis and Niklas Zennström, with headquarters in Luxembourg Acquired by eBay for a total up-front consideration of approximately $2.5 billion April August Founded by Janus Friis and Niklas Zennström,
with headquarters in Luxembourg First public beta version released (http://investor.ebay.com/ReleaseDetail.cfm?ReleaseID=176402&FYear=) April December October 100 million registered users mark Skype 2.0 for Mac released Skype 3.0 for Windows released November Acquired by Silver Lake (70% stake for approximately $2 billion) May October 14 Skype 5.0 beta released,
3G network calls Skype 5.0 for Windows released January 14 Acquired Qik, a mobile-based live video-sharing platform May 10 Acquired by Microsoft for $8.5 billion Skype's Development Skype
Competitors cheaper as compared to oversea calling More interaction between parties
during communication Enhance communication effectiveness Towards Individual: Accessibility
Cost saving
Towards Businesses:Financially cheaper to set up VOIP infrastructure across the board as compared to Alternative feedback and support medium for oversea clienteleAdditional added services are a great plus as it allows better responsiveness and flexibility
Data sharing
Integration of telephone, fax, e-mail and other applications to capitalise on the benefits of unified messaging. Currently, growing trend of organisation's network shifting over to VOIP
Some VoIP services don’t work during power outages
VoIP is susceptible to worms, viruses and hacking.
Because VoIP uses an Internet connection, it's susceptible to all the hiccups normally associated with home broadband services. All of these factors affect call quality:
Jitter (time variation of a periodic signal or variable delay in communication)
Packet loss
Packet delay
Phone conversations can become distorted, garbled or lost because of transmission errors. Challenges/
Limitations ATA (Analog Telephone Adapters)
Connects a standard phone to a computer or an Internet connection for use with VoIP.
The ATA is an analog-to-digital converter.

IP Phones
connect directly to a router and have all the hardware and software necessary right onboard to handle the IP call.

There are several companies offering free or very low-cost software that you can use for this type of VoIP.
All you need is the software, a microphone, speakers, a sound card and an Internet connection VoIP Connections VoIP converts the voice signal from your telephone into a digital signal , typically reduced in data rate using speech compression techniques encapsulated in a data packet that travels over the Internet. How does VoIP work? Voice over Internet Protocol (VoIP) is a technology that enables one to make and receive phone calls through the Internet instead of using the traditional analog PSTN (Public Switched Telephone Network) lines. What is VOIP ? To make and receive calls with / without a computer
Can surf the net while making calls
Can make and receive call to / from PSTN
Cost effective
Digital features not commonly available on PSTN lines such as :
voice mail
caller ID
conference and so on are available in VoIP. Why VOIP ? In most cases, IP Routing Logic is still managed by a Service Provider’s Network
– Not yours Routers Routers Routers Firewall Firewall Public Internet or Private WAN Subscribers Subscribers Enterprise Network Enterprise Network What’s Inside an IP Network?
Full transcript