Vonage, AT&T Top VOIP Ratings
Keynote Systems placed VOIP calls every 30 minutes on a variety of networks and services, evaluating every service for uptimes, call quality and audio delays.
VOIP calls have yet to exceed the standards and reliability of traditional POTS ("plain old telephone service") calls, the study found.
Vonage was found to be the most reliable VOIP vendor of those surveyed, which included AT&T CallVantage, Packet 8, Primus Lingo, Skype Technologies SAs SkypeOut service, Verizons Voicewing and Vonage America Inc., together with business DSL calls made over the AT&T, Sprint and UUNet SA networks.
Vonage ranked first overall in the Keynote study as the most reliable VOIP service provider, with a normalized rank of over 80 points on a scale of 0 to 100, although the firm said that "Vonage still has room for improvement on the Dropped Calls performance factor."
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