VoIP Doesn’t Work Over Low Bandwidth, Noisy Networks Such As GPRS

VoIP services designed for broadband Internet connections, such as Skype and Vonage, aren't viable over GPRS links today:

  • There is not enough bandwidth. In reality, users only achieve 1-2KB/sec data rates. This is much lower than the circa-96Kbit/sec data rates employed out of the box by these services
  • Packet losses (and hence voice dropouts) are far too frequent

... David Ferris and Nick Shelness

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