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Free Download voice over internet protocol seminar presentations presentation ppt.


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 voice over internet protocol seminar presentations

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voice over internet protocol seminar presentations download

what is voip ?
voice-over-internet protocol (voip) is a protocol optimized for the transmission of voice through the internet or other packet-switched networks.

history
  • it’s the topic of intrest since first computer network #1973
  • internet reached to end users #1980
  • a product called vocaltac internet phone launched with some extra features #1996
  • only possible to talk with vocaltac devices not gateway to pstn 
  • softswitches #1998
introduction to voip   
  • voice-over-internet protocol (voip) is a protocol optimized for the transmission of voice through the internet or other packet-switched networks.
  • voip aka internet telephony, broadband phone, broadband telephony, voice over broadband etc.
  • experimented as network voice protocol in arpanet #1973
  • voice-over-ip systems carry telephony signals as digital audio, typically reduced in data rate using speech data compression techniques, encapsulated in a data-packet stream over ip. 

why to use voip….?
  • less expensive than pstn
  • more than one call @ one time
  • providing some services at zero or near zero cost. i.e conference, call forwarding, automatic redial etc.
  • secure calling due to standardize protocols
  • location independence
  • integrated with services of internet
  • mobility 
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