3 ms·The real question is Flex or v90.by cpuguy83 5y agoThe real question is Flex or v90.ceautery 5y agoRight. I vaguely remember when that happened. I think USR was trying to rush a 56k modem out before Hayes, so they invented their own protocol instead of waiting for ANSI to standardize V.90.ok123456 5y agoWhat bout X2?