V.90/92 modems preferentially connect in V.90 mode if they cannot they automatically fallback to V.34. High-end connection speed of V.34 and low end of V.90/92 overlap. To determine if the modem is in V.90/92 mode external modems typically include a mode indicator. For modems without this feature connect speed can be used to determine mode. If the modem reports 28,000, 29,333, 30,667, 32,000, 33,333, 34,667, 36,000 or higher it is in Barlow 56k , Barlow, KY 56k BarlowBarlow , 56k Kentucky, Barlow 56k
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