USR had HST (High Speed Transfer), but the king was Telebit with TrailBlazer utilizing PEP (Packetized Ensemble Protocol). https://en.wikipedia.org/wiki/Teleb

USR had HST (High Speed Transfer), but the king was Telebit with TrailBlazer utilizing PEP (Packetized Ensemble Protocol). https://en.wikipedia.org/wiki/Telebit#PEP_and_the_TrailBlazer https://en.wikipedia.org/wiki/Telebit#PEP_and_the_TrailBlaze... Supra on the other hand offered ridiculous discounts "A manufacturer that disappeared leaving a trace in the industry Supra where cheap modems were sold in large quantities even in Akihabara" 2/3 https://ascii-jp.translate.goog/elem/000/001/425/1425488/index-2.html?_x_tr_sl=ja&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=sc https://ascii-jp.translate.goog/elem/000/001/425/1425488/ind... >Smartmodem 2400 had dropped in price to around $500 in 1987, but was still an expensive product. In 1987, Supra Corporation launched the SupraModem 2400, which is fully compatible with the Smartmodem 2400, for just $179.