1. Presented by Maria Shah

2. Road Map  VoIP Benefits  VoIP Protocols  VoIP Analysis  Advantages  Disadvantages  Implementing  Security  Summary

3. Introduction  Voice Over Internet Protocol (VoIP) Uses IP to transmit voice packets of the internet  VoIP can be used on any data network  Skype is an example of a popular VoIP application

4. VoIP Benefits  VoIP is inexpensive  Scalability  Reduce operating costs  Improve productivity  Wireless-compatible  Enhanced customer service  Dependable call management  Flexibility

5. VoIP Protocols  Standard Real-Time Protocol (RTP) Used for transmitting audio and video packets between computers  Session Initiation Protocol (SIP) An Application-Layer signaling-control used to establish, maintain and terminate multimedia sessions

6. Overview of SIP  SIP Addressing  Locating a SIP server  SIP Transaction  SIP Invitation  Locating a User  Changing an existing session

7. Diagram Initiating Call

8. Diagram of Network

9. VoIP Analysis  Delay/Latency  Jitter  Echo  Packet Loss  Voice Activity Detection  Digital-to-Analog conversion

10. Advantages  Reduction in Cost Companies already pay for high speed internet  Ability to route calls to one location Saves money on staff  VoIP is mobile Ability for employees to work from home

11. Disadvantages  Getting disconnected Employee has too many programs running  Call Qualities Jittery or Echoes

12. Implementing  Intelligent Multi-path Switching Gateways Easy, Cost effective way to switch to VoIP Integrates a gateway, a gatekeeper, intelligent call routing

13. Security  Protect Communication  Open-standards-based, Multi-vendor s

14. Summary  VoIP is useful for businesses and reduces cost  Some problems, but can be avoided  Security is a big factor in making the switch

15. Resources  http://www.rivier.edu/journal/roaj-2006- spring/j28-kumar.pdf http://www.rivier.edu/journal/roaj-2006- spring/j28-kumar.pdf  http://en.wikipedia.org/wiki/Voice_over_I P http://en.wikipedia.org/wiki/Voice_over_I P

16. Questions?