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Voice Over IP

Voice Over IP . Section 1: VoIP Basics Section 2: VoIP at ECU. Christopher P. Furner April 2002 DSCI 4123, 002. Section 1 ~ VoIP Basics. Transfers through Routers, LAN Switches etc, using their Protocols. Definitions [1]. Internet Protocol (IP) Private Branch Exchange (PBX) Gateway

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Voice Over IP

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  1. Voice Over IP Section 1: VoIP Basics Section 2: VoIP at ECU Christopher P. Furner April 2002 DSCI 4123, 002 Furner

  2. Section 1 ~ VoIP Basics Transfers through Routers, LAN Switches etc, using their Protocols Furner

  3. Definitions [1] • Internet Protocol (IP) • Private Branch Exchange (PBX) • Gateway • Public Switched Telephone Network • Public Switched Data Network • Coder/Decoder (Codec) Furner

  4. From Voice to Data Voice Analog CODEC: Analog to Digital Compress Create Voice Datagram Add Header (RTP, UDP, IP, etc) Digital Furner

  5. From Data to Voice Digital Process Header Re-sequence and Buffer Delay Decompress CODEC: Digital to Analog Analog Voice Furner

  6. Origin of Standards [4] Internet Engineering Task Force [6] International Telecommunication Union Furner

  7. Protocols [2] Furner

  8. How VoIP Works [2] Furner

  9. Voice Over IP Phone [3] Costs $361 Built In Browser Has MAC Address Furner

  10. Advantages of VoIP • More Efficient Use of Network [2] • Integration Capabilities [3] • Improved Voice Quality [3] • Wireless Capabilities [3] • Less Workload on Call Manager [3] Furner

  11. No Loss No retransmission Direct Pass Through Traffic Related Network Characteristics Voice Data • Packet Loss • Retransmission • Uses protocols Furner

  12. Section 2 • VoIP At ECU Furner

  13. Section 2: VoIP At ECU • March 2001, ECU’s first successful calls were placed across the Internet Link to North Carolina State University. • Voice quality was excellent and no problems were experienced. • Currently all VoIP phones are routing PSTN calls via the gateway. Furner

  14. ECU as VoIP Leader • Mr. Jackson at Conference in November • Reported Great Success Furner

  15. Other NC Schools Interested in VoIP • UNC Chapel Hill • North Carolina State University • UNC Wilmington Furner

  16. ECU’s Distinction • Only University to use VoIP 100% independent from regular Phone System • VoIP will work if our phone system goes down Furner

  17. VoIP Workshop & TOS Priority Model [3] 6: Network Control 5: Voice (Highest Priority) 4: Video (Telecast, Videoconferencing) 3: Not Used 2, 1, 0: Normal Data Traffic Differs from Standard QOS architecture [5], Page. 116 Furner

  18. Dual Environment [3] • ECU Currently uses both the old switch and VoIP for voice. • $12,000,000.00 Switch (DMS) • 35 Phones Across Campus • Running Very Well Furner

  19. Funding Issues • Funding Cutting Edge Technology Difficult in a Large Organization • Recent Budget Cuts • No Funding for Next Semester Furner

  20. Context Diagram [3] Furner

  21. Deployment Diagram [3] Furner

  22. Intelligence • With Conventional Phones, more then 95% resides within the Call Manager • With VoIP, Call Manager only connects call, then gets out of way. • In VoIP, 30% of Intelligence resides within the Hosts (phones) Furner

  23. Phones, A Closer Look [3] • Cost $361 • Own Mac Address • Soft Keys • 6 Lines • Do Not require Line Card • Built In Browser • A Comparable standard Business Phone costs around $500 • Requires a $200 Line Card Furner

  24. Exciting Features [3] • Integration with Existing Databases • Exchange Directory • Calendars • Integration with E-mail • .wav Messages Furner

  25. Exciting Features [3] • Speech Recognition Potential • Dictation • Text E-mail Messages • Compatible with Wireless • SpectraLink offers VoIP using Cellular Technology • Access Points Allow VoIP • However a Carrier needs to pick up the signal when user leaves AP’s Range Furner

  26. VoIP’s Future at ECU [3] • Will Continue to Use a Dual Enviroment until full switchover is cost effective • Expect Cotanch building to be all VoIP by end of May • Expect to be 165 Phones Strong by August • New Science and Technology Building will be 100% VoIP, and be 100% Compatible with Wireless and Gigabit t-100 Blades Furner

  27. VoIP’s Future at ECU [3] • Introduction into Residence Halls • 1 Phone per room with 2 lines and 2 distinct Rings • Wireless • Need to find a Carrier Furner

  28. Works Cited • [1] Shafer, Kevin. Novell’s Dictionary of Networking. 2002. P242 • [2] How IP Telephony Works Online • [3] Interview with Martin Jackson • 04/11/02 • [4] What is Internet Telephony Online Furner

  29. Works Cited • [5] Muller, Nathan J. Desktop Encyclopedia of the Internet. 2002. • 6: Internet Engineering Task Force: Overview. Online Furner

  30. Thank YOU Questions? Furner

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