New 56K V.92/V.90 External USB Fax Modem ITU-T V.90/V.92; 115.2Kbps DTE baud rate Full-duplex 56Kbps/data/fax ITU-T V.42 and MNP 2-4 data error Correction V4.2 bit and MNP5 data compression protocol Enhanced AT command set