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Ip

  1. 1. INTERNET PROTOCOL TELEPHONY PRESENTED BY:- GAURAV DASHARIA BHAGAT SINGH ATUL KUMAR SENGAR
  2. 2. <ul><ul><li>Introduction </li></ul></ul><ul><ul><li>Voice-over-Internet-Protocol </li></ul></ul><ul><ul><li>Transmission of Voice Using IP </li></ul></ul><ul><ul><li>Market Prospects </li></ul></ul><ul><ul><li>Session Initiation Protocol </li></ul></ul><ul><ul><li>H.323 Protocol </li></ul></ul><ul><ul><li>Advantages of IP for Voice </li></ul></ul><ul><ul><li>Disadvantages </li></ul></ul><ul><ul><li>Applications </li></ul></ul>
  3. 3. Introduction <ul><li>Technologies that use Internet protocol </li></ul><ul><li>have the potential to reduce costs. </li></ul><ul><li>Internet protocol technology pose </li></ul><ul><li>challenges for regulators. </li></ul><ul><li>Internet protocol technology for voice </li></ul><ul><li>can advance the goal of affordable </li></ul><ul><li>service. </li></ul>
  4. 4. <ul><li>VoIP is a term that refers to all types </li></ul><ul><li>of voice communication using Internet </li></ul><ul><li>protocol technology. </li></ul><ul><li>Voice-over-the-internet is a service in </li></ul><ul><li>which a regular voice telephone call is </li></ul><ul><li>transmitted. </li></ul>
  5. 5. <ul><li>The caller’s voice is digitized. </li></ul><ul><li>The digital voice is compressed and </li></ul><ul><li>then separated into packets. </li></ul><ul><li>Packets may be lost or delayed </li></ul><ul><li>during transmission on the Internet. </li></ul><ul><li>The transmission is assembled to </li></ul><ul><li>restore the data. </li></ul>
  6. 6. <ul><li>A VoIP system consists of a number </li></ul><ul><li>of different components. </li></ul><ul><li>The digital signal processor segments </li></ul><ul><li>the voice signal into frames. </li></ul><ul><li>Coders are used for efficient bandwidth </li></ul><ul><li>utilization. </li></ul>
  7. 7. SET UP REQUIRED
  8. 8. <ul><li>Phones are connected directly to </li></ul><ul><li>telephone company phone lines. </li></ul><ul><li>Household VoIP hardware uses </li></ul><ul><li>broadband modems. </li></ul><ul><li>Early adopters of VoIP may also be </li></ul><ul><li>users of other phone equipment. </li></ul>
  9. 9. <ul><li>Takes up a dedicated communication </li></ul><ul><li>path. </li></ul><ul><li>The source and destination are </li></ul><ul><li>connected temporarily. </li></ul><ul><li>Destination node status is necessary. </li></ul>
  10. 10. <ul><li>Messages are received at intermediate </li></ul><ul><li>routing points. </li></ul><ul><li>Also known as store and forward </li></ul><ul><li>switching. </li></ul><ul><li>Normally accepts all traffic. </li></ul>
  11. 11. Session Initiation Protocol <ul><li>Designed by Henning Schulzrinne and </li></ul><ul><li>Mark Handley in 1996. </li></ul><ul><li>Used for creating, modifying and </li></ul><ul><li>terminating sessions. </li></ul><ul><li>Features of SIP are: </li></ul><ul><li>Light weight </li></ul><ul><li>Transport-independent </li></ul>
  12. 12. <ul><li>SIP clients use TCP to connect to SIP </li></ul><ul><li>servers and other SIP endpoints. </li></ul><ul><li>SIP can be used where session </li></ul><ul><li>initiation is a requirement. </li></ul><ul><li>SIP was used to provide a signalling </li></ul><ul><li>and call set up protocol. </li></ul>
  13. 14. <ul><li>Makes use of elements called proxy </li></ul><ul><li>servers. </li></ul><ul><li>Provides a registration function. </li></ul><ul><li>A user agent server is given the special </li></ul><ul><li>name called Registrar. </li></ul>
  14. 15. <ul><li>Allow callers and callees to be </li></ul><ul><li>identified. </li></ul><ul><li>Invitation is the most common </li></ul><ul><li>operation of SIP. </li></ul>
  15. 16. <ul><li>Relies on following recommendations: </li></ul><ul><ul><li>Call signaling </li></ul></ul><ul><ul><li>Bearer signaling </li></ul></ul><ul><ul><li>Transport of audio,video </li></ul></ul><ul><ul><li>Security defined </li></ul></ul>
  16. 17. <ul><li>Defines several types of equipment. </li></ul><ul><li>Consists of following devices: </li></ul><ul><ul><li>Terminal </li></ul></ul><ul><ul><li>Gateway </li></ul></ul><ul><ul><li>Gatekeeper </li></ul></ul><ul><ul><li>MCU </li></ul></ul>
  17. 19. <ul><li>Greater Efficiency </li></ul><ul><li>Lower Cost </li></ul><ul><li>Higher Reliability </li></ul><ul><li>Supporting Innovation </li></ul>
  18. 20. <ul><li>SIP is transported over Transmission </li></ul><ul><li>Control Protocol. </li></ul><ul><li>Supports user mobility with two </li></ul><ul><li>operating modes: </li></ul><ul><ul><li>Proxy </li></ul></ul><ul><ul><li>Redirect </li></ul></ul>
  19. 22. <ul><li>H.323 is a packet-based multimedia </li></ul><ul><li>communication system. </li></ul><ul><li>Classify and solve multimedia </li></ul><ul><li>delivery issues. </li></ul><ul><li>Contains three components: </li></ul><ul><ul><li>Call processing servers </li></ul></ul><ul><ul><li>Media gateways </li></ul></ul><ul><ul><li>Gatekeepers </li></ul></ul>
  20. 23. <ul><li>The business benefits: </li></ul><ul><ul><li>Reduced long distance costs </li></ul></ul><ul><ul><li>More enhanced services </li></ul></ul><ul><li>The technical benefits: </li></ul><ul><ul><li>Less bandwidth </li></ul></ul><ul><ul><li>More efficient use </li></ul></ul>
  21. 24. <ul><li>VoIP is dependent on wall power. </li></ul><ul><li>Systems may be integrated into the </li></ul><ul><li>phone line. </li></ul><ul><li>Emergency 911 calls. </li></ul><ul><li>Normally associated with </li></ul><ul><li>home broadband services. </li></ul>
  22. 25. <ul><li>Radio Over Internet Protocol has </li></ul><ul><li>adapted VoIP. </li></ul><ul><li>Radio operators using radios are </li></ul><ul><li>able to tune to repeaters. </li></ul>
  23. 26. <ul><li>Internet based telephony holds the </li></ul><ul><li>future of communication . </li></ul><ul><li>Efforts are being made to make the </li></ul><ul><li>maximum possible utilization of the </li></ul><ul><li>bandwidth. </li></ul>
  24. 27. Any Questions…..????

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