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Netergy - Stanford - VoIP A Show-and-Tell After the First 12 Month

Netergy - Stanford - VoIP A Show-and-Tell After the First 12 Month. Niko F ä rber, Yi Liang, Mack Hashemi Bernd Girod, Balaji Prabhakar. Growth in VoIP Traffic. VoIP is one of the fastest-growing technologies in communications 900% 1998-1999 5000% 1999-2004. 2004. 135 billion minutes.

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Netergy - Stanford - VoIP A Show-and-Tell After the First 12 Month

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  1. Netergy - Stanford - VoIPA Show-and-Tell After the First 12 Month Niko Färber, Yi Liang, Mack Hashemi Bernd Girod, Balaji Prabhakar

  2. Growth in VoIP Traffic • VoIP is one of the fastest-growing technologies in communications • 900% 1998-1999 • 5000% 1999-2004 2004 135 billion minutes 1999 2.7 billion minutes 1998 310 million minutes Source: IEEE Spectrum, May 2000

  3. IP Phone T2 • Use Netergy’s Audacity T2 as platform for VoIP deployment Scenario LAN Host • Legacy LANs often do not support priority queuing mechanisms • DiffServ in Internet backbone is still evolving S R WAN ... VoIP has to deal with best-effort service of IP

  4. Netergy Networks’ Audacity T2 • Highly integrated OEM solution • Single chip, minimal extension components • Two Ethernet ports • Local PC • Network • Audio functionality • G.711, G.72x • Echo cancellation • Comfort noise • VoIP software stacks • H.323 • MGCP • SIP Source: www.netergynet.com

  5. Make Application Network friendly Make Network Application friendly exploit interactions, strength, weaknesses Networked Multimedia • Signal Processing • Improve tolerance todelay variations and loss • Adaptive playout • Loss concealment best-effort VoIP • Networking • Control traffic on LANto reduce delay variationsand loss • Reduced TCP window size

  6. Agenda 10:30 Welcome 10:45 Niko FärberReduced TCP Window Size for VoIP in Legacy LAN Environments 11:30 Yi LiangAdaptive Playout Scheduling Using Time-Scale Modification 12:30 Lunch at Faculty Club 13:30 Mack HashemiNetergy Network’s Perspective, Open Issues, and Future Work 14:30 End

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