Ken D'Ambrosio wrote:
They use the G.168-2002 algorithm; I, personally, had never heard of it before, but I bounced it off a friend of mine (he's a hardware architect for a major VoIP switch manufacturer -- they sell to places like Time Warner), and he was of the opinion that G.168 is the _ONLY_ algorithm.
You might want to do some research before making statements like that... G.168 is a set of recommendations of characteristics that an echo canceler implementation should provide, and a set of tests designed to determine whether an implementation is compliant with the recommendations. The current recommendations were released in 2004.
G.168 is _not_ an algorithm, so your friend must have a slight misunderstanding of the situation. There are many (dozens, maybe hundreds) of implementations out there claiming to be G.168 compliant, but most of them have not been tested by a third party to verify those claims.
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