<ul>What is VoIP? </ul><ul><li>VoIP [Voice over Internet Protocol] is family of communication protocols and transmission t...
<ul>How VoIP works? </ul><ul><li>VoIP protocols first converts your voice or media into digital signal and travels over th...
<ul>How VoIP works? </ul>
<ul>VoIP Protocols </ul><ul><li>Some VoIP  protocols : </li></ul><ul><li>H.323
IMS [IP Multimedia System]
MGCP [Media Gateway Control Protocol]
SIP [Session Initiation Protocol]
RTP [Real-time Transport protocol]
SDP [Session Description Protocol]
IAX [Inter-Asterisk eXchange] </li></ul>
<ul>What is PSTN? </ul><ul><li>PSTN [Public Switched Telephone Network] is the network of circuit-switched telephone netwo...
<ul>PSTN vs. VoIP  </ul><ul>Carrier Lines </ul><ul><li>PSTN : Dedicated lines required from telecom company
VoIP : Only an internet connection is required </li></ul><ul>Bandwidth </ul><ul><li>PSTN : Each telephone lines require 64...
VoIP : Using compression, VoIP can use only 10kbps in each  direction </li></ul><ul>Features </ul><ul><li>PSTN : call wait...
VoIP : all features are generally free </li></ul>
<ul>Continue . . . </ul><ul>Upgrade and Expansion </ul><ul><li>PSTN : Very complex due to change in hardware and wires
VoIP : Sometimes just require more bandwidth and software uprade </li></ul><ul>Rental </ul><ul><li>PSTN : Expensive compar...
VoIP : About 1/4 times less expensive to PSTN </li></ul><ul>Remote PABX extension </ul><ul><li>PSTN : Very costly and requ...
VoIP : It is a standard feature of VoIP </li></ul>
<ul>Applications </ul><ul><li>Some application that you used in your daily life is based on VoIP. </li></ul><ul><li>Like S...
<ul>Some Application </ul>
<ul>VoIP Devices </ul><ul>[1]  ATA : Most useful device for VoIP is ATA (Analog telephone Adaptor). It helps you to connec...
<ul>Continue… </ul><ul>[2]  Computer-to-computer  : Its the easiest way to make VoIP calls. You just need to have a softwa...
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Voip introduction

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here you can get the introduction about VoIP and the live demonstration of the VoIP.

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Voip introduction

  1. 2. <ul>What is VoIP? </ul><ul><li>VoIP [Voice over Internet Protocol] is family of communication protocols and transmission technique which is used in delivery of voice communication or multimedia sessions over internet. </li></ul>
  2. 3. <ul>How VoIP works? </ul><ul><li>VoIP protocols first converts your voice or media into digital signal and travels over the internet. At receiver side it decode in its original format. </li></ul><ul><li>VoIP allows you to make a call from your desktops/laptops or from IP phones using internet. You can make a call from your traditional telephones using spceial type of phone adapter. </li></ul>
  3. 4. <ul>How VoIP works? </ul>
  4. 5. <ul>VoIP Protocols </ul><ul><li>Some VoIP protocols : </li></ul><ul><li>H.323
  5. 6. IMS [IP Multimedia System]
  6. 7. MGCP [Media Gateway Control Protocol]
  7. 8. SIP [Session Initiation Protocol]
  8. 9. RTP [Real-time Transport protocol]
  9. 10. SDP [Session Description Protocol]
  10. 11. IAX [Inter-Asterisk eXchange] </li></ul>
  11. 12. <ul>What is PSTN? </ul><ul><li>PSTN [Public Switched Telephone Network] is the network of circuit-switched telephone network which is based on telephone lines, fibre optics, celluler networks, communication satelites etc. </li></ul><ul><li>It is our conventional method of voice communication which is based on circuit switching which are now replaced by VoIP technique. </li></ul>
  12. 13. <ul>PSTN vs. VoIP </ul><ul>Carrier Lines </ul><ul><li>PSTN : Dedicated lines required from telecom company
  13. 14. VoIP : Only an internet connection is required </li></ul><ul>Bandwidth </ul><ul><li>PSTN : Each telephone lines require 64kbps in each direction
  14. 15. VoIP : Using compression, VoIP can use only 10kbps in each direction </li></ul><ul>Features </ul><ul><li>PSTN : call waiting, call conference, caller ID available at an extra cost
  15. 16. VoIP : all features are generally free </li></ul>
  16. 17. <ul>Continue . . . </ul><ul>Upgrade and Expansion </ul><ul><li>PSTN : Very complex due to change in hardware and wires
  17. 18. VoIP : Sometimes just require more bandwidth and software uprade </li></ul><ul>Rental </ul><ul><li>PSTN : Expensive compare to VoIP
  18. 19. VoIP : About 1/4 times less expensive to PSTN </li></ul><ul>Remote PABX extension </ul><ul><li>PSTN : Very costly and require each dedicated line for each
  19. 20. VoIP : It is a standard feature of VoIP </li></ul>
  20. 21. <ul>Applications </ul><ul><li>Some application that you used in your daily life is based on VoIP. </li></ul><ul><li>Like Skype, Gtalk, Yahoo Messenger, Fring, E-buddy, Nimbuzz, Twinkle, Brosix, SIPSet, Gizmo, iChat, iCall that are used on various platform like Windows, Linux, MAC OS X, Android and many mobile platforms. </li></ul>
  21. 22. <ul>Some Application </ul>
  22. 23. <ul>VoIP Devices </ul><ul>[1] ATA : Most useful device for VoIP is ATA (Analog telephone Adaptor). It helps you to connect your standard phone to computer and lets you call. </ul>
  23. 24. <ul>Continue… </ul><ul>[2] Computer-to-computer : Its the easiest way to make VoIP calls. You just need to have a software, microphone, speaker and sound card (and internet connection obviously ! ! !).There are not any additional charges for this. </ul>
  24. 25. <ul>Continue… </ul><ul>[3] IP Phone : This look like just a simple phone with the headset and different buttons. IP Phones connect directly to your router and contain all the necessary software and hardware to handle the IP calls. </ul>
  25. 26. <ul>VoIP Providers </ul>
  26. 27. <ul>How to use VoIP ? </ul><ul>There are three ways of using VoIP. </ul><ul><li>Using ATA connector
  27. 28. PC to PC
  28. 29. By creating PBX server </li></ul>
  29. 30. <ul>1) VoIP using ATA connector </ul><ul>Steps: </ul><ul><li>Plug the cord from your phone into the ATA.
  30. 31. An internet cord from the ATA into your router or internet connection.
  31. 32. And configure your ATA for first time. </li></ul>
  32. 33. <ul>VoIP using ATA </ul>
  33. 34. <ul>2) VoIP using PC-PC </ul><ul>Steps: </ul><ul><li>Register your account (Gtalk, Iptel, Skype, etc.)
  34. 35. First install same VoIP client on both PC. </li></ul><ul>(Jitsi, Twinkle, Gtalk, Yate etc.) </ul><ul><li>Establish connection between two PC through Internet connection. </li></ul><ul><ul><li>[live demo using jitsi] </li></ul></ul>
  35. 36. <ul>3) To establish a PBX server </ul><ul><li>First install the appropriate software that creates PBX server.(i.e. 3CX,Asterisk OS etc.)
  36. 37. Then configure the server according to your need and requirements.
  37. 38. Then activate your VoIP account in this server. </li></ul><ul>[live demo using Asterisk OS] </ul><ul>How to create PBX server </ul>
  38. 39. <ul>Google : Voice Service </ul><ul>In 2010, Googel also starts its voice calling service. You can access it by tyipng http://www.google.com/voice </ul>
  39. 40. Google : Price Comparision
  40. 41. <ul>Live Demonstration of VoIP </ul><ul><li>We may do VoIP to PSTN call using VoIP account.
  41. 42. www.evaphone.com </li></ul>
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