Keynote Systems measured the performance of popular VOIP providers. Service from Vonage, Time Warner Cable and MCI scored the highest on reliability. AT&T CallVantage got the highest score on voice clarity.
Apple
Keynote ranks top VOIP services: Vonage and CallVantage
Keynote Systems measured the performance of popular VOIP providers. Service from Vonage, Time Warner Cable and MCI scored the highest on reliability.
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