... It supports data compressing protocol V.90 (56 Kbps), V.34 (33.6 Kbps) ... V.92, V.90, V.34, V.32 bis, V.32, V.22 Bis, V.22, V.23, V.21, Bell212 A, 103Fax protocol: V.17, V.29, V.27ter and V ... .21 Channel 2 fax protocol, fax rate is up to 14,400 KbpsData error burst correcting: V.42 ... LAPM and MNP2 - 4Data compression: V.44, V.42 bis and MNP5Command ...