500ms phone calls are no longer practical. It would be like asking a question and getting the answer after you've gone to lunch. As a reference, the typical delay when speaking through a geo-stationary satellite is 150-500ms. Delay in data networks is not as critical. An additional delay of 200ms on an e-mail or web page will generally not be noticed, but voice callers on the same network would be hampered Boonton 56k , Boonton, NJ 56k BoontonBoonton , 56k New Jersey, Boonton 56k
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