The document presents an overview of Voice over Internet Protocol (VoIP) technology. It discusses how gateways allow calls to transfer between networks, and covers protocols like H.323 and encoding standards like G.723.1 that are used for VoIP calls. Benefits of VoIP include using a single network infrastructure and simple upgrades. Challenges can include latency, jitter and packet loss. The conclusion is that VoIP will continue growing as more voice traffic moves to data networks.

1. A PRESENTATION ON

2. CONTENTS :

3. INTRODUCTION :

4. WHAT IS VOIP ?

5. GATE WAY: The gateway allows the calls to transfer from one network to the other The gateway allows the calls to transfer from one network to the other The gateway allows the calls to transfer from one network to the other The gateway allows the calls to transfer from one network to the other The gateway allows the calls to transfer from one network to the other The gateway allows the calls to transfer from one network to the other

6. REQUIREMENTS OF VOIP :

7. HOW VOIP WORKS : part 1

8. IP PBX

9. PART 2 : PROTOCOLS H.323 Call Sequence

10. PART 3: ENCODING 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. The main difference between each of these encoders is the amount of bandwidth they use, G.711 uses 64kbit/s and G.723.1 PART 4: QUALITY Good echo suppression for good echo quality . G.723.1 for quality For Documentation and Downloads Visit

11. Some Applications of VoIP Click to talk web sites for e-commerce Broadcast audio and video Integrated messaging Fax over IP For Documentation and Downloads Visit

12. PROS : Single network infrastructure . VoIP uses "soft" switching Simple upgrade path Bandwidth efficiency. CONS : Latency Jitter Packet loss For Documentation and Downloads Visit

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 : For Documentation and Downloads Visit

14. REFRENCES: Computer Networks by Andrew S.Tanenbaum Internetworking with TCP/IP by Douglas E.comer www.iec.org.com www.telogy.com www.rad.com www.mailto:blazer@gslis.utexas.edu For Documentation and Downloads Visit

15. THANK YOU For Documentation and Downloads Visit

16. ANY QUERIES