A  PRESENTATION  ON
CONTENTS :
INTRODUCTION :
WHAT  IS VOIP ?
GATE WAY: <ul><li>The gateway allows the calls to transfer from one network to the other </li></ul><ul><li>The gateway all...
REQUIREMENTS OF VOIP :
HOW  VOIP  WORKS : part 1
IP PBX
PART  2 : PROTOCOLS H.323 Call Sequence
PART  3: ENCODING <ul><li>During the call setup H.323 to decide which speech encoder/decoder to use when they send the spe...
Some Applications of VoIP <ul><li>Click to talk web sites for e-commerce </li></ul><ul><li>Broadcast audio and video </li>...
PROS : <ul><li>Single network infrastructure . </li></ul><ul><li>VoIP uses &quot;soft&quot; switching   </li></ul><ul><li>...
Without a doubt, the data revolution will only gain momentum in the coming years, with more and more voice traffic moving ...
<ul><li>REFRENCES: </li></ul><ul><li>Computer Networks by Andrew S.Tanenbaum </li></ul><ul><li>Internetworking with TCP/IP...
THANK YOU
ANY QUERIES
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VOIP

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VOIP(voice over ip- that is,voice delivered using the internet protocol).is a term usred in ip telephony for a set of facilities for managing the delivey of voice information using the internet Protocol (IP). This is probably the best known and most publicized, talking PC to PC. VoIP is therefore telephony using a packet based network instead of the PSTN (circuit switched). "Voice over IP is the technology of digitizing sound, compressing it, breaking it up into data packets, and sending it over an IP (internet protocol) network where it is reassembled, decompressed, and converted back into an analog wave form.." Interoffice calls are free, since the company already has the bandwidth between offices. The technology is transparent to the user, and requires minimum training. Single cable infrastructure. Future proof technology. Users with ubiquitous voice and data service integrated over one universal infrastructure will benefit from true, seamless, transparent interworking between voice and all types of data.

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    Thanks in advance...
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VOIP

  1. 1. A PRESENTATION ON
  2. 2. CONTENTS :
  3. 3. INTRODUCTION :
  4. 4. WHAT IS VOIP ?
  5. 5. GATE WAY: <ul><li>The gateway allows the calls to transfer from one network to the other </li></ul><ul><li>The gateway allows the calls to transfer from one network to the other </li></ul><ul><li>The gateway allows the calls to transfer from one network to the other </li></ul><ul><li>The gateway allows the calls to transfer from one network to the other </li></ul><ul><li>The gateway allows the calls to transfer from one network to the other </li></ul>The gateway allows the calls to transfer from one network to the other
  6. 6. REQUIREMENTS OF VOIP :
  7. 7. HOW VOIP WORKS : part 1
  8. 8. IP PBX
  9. 9. PART 2 : PROTOCOLS H.323 Call Sequence
  10. 10. PART 3: ENCODING <ul><li>During the call setup H.323 to decide which speech encoder/decoder to use when they send the speech to the other phone, G.723.1, G.711 and G729. </li></ul><ul><li>The main difference between each of these encoders is the amount of bandwidth they use, G.711 uses 64kbit/s and G.723.1 </li></ul>PART 4: QUALITY <ul><li>Good echo suppression for good echo quality . </li></ul><ul><li>G.723.1 for quality </li></ul>
  11. 11. Some Applications of VoIP <ul><li>Click to talk web sites for e-commerce </li></ul><ul><li>Broadcast audio and video </li></ul><ul><li>Integrated messaging </li></ul><ul><li>Fax over IP </li></ul>
  12. 12. PROS : <ul><li>Single network infrastructure . </li></ul><ul><li>VoIP uses &quot;soft&quot; switching </li></ul><ul><li>Simple upgrade path </li></ul><ul><li>Bandwidth efficiency. </li></ul>CONS : <ul><ul><li>Latency </li></ul></ul><ul><ul><li>Jitter </li></ul></ul><ul><ul><li>Packet loss </li></ul></ul>
  13. 13. Without a doubt, the data revolution will only gain momentum in the coming years, with more and more voice traffic moving onto data networks. Vendors of voice equipment will continue to develop integrated voice and data devices based on packetized technology. Users with ubiquitous voice and data service integrated over one universal infrastructure will benefit from true, seamless, transparent interworking between voice and all types of data. CONCLUSION :
  14. 14. <ul><li>REFRENCES: </li></ul><ul><li>Computer Networks by Andrew S.Tanenbaum </li></ul><ul><li>Internetworking with TCP/IP by Douglas E.comer </li></ul><ul><li>www.iec.org.com </li></ul><ul><li>www.telogy.com </li></ul><ul><li>www.rad.com </li></ul><ul><li>www.mailto:blazer@gslis.utexas.edu </li></ul>
  15. 15. THANK YOU
  16. 16. ANY QUERIES

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