56K Internal Fax Modem

V.90 56,000bps data downloadV.34+, V.34, V.32bis, V.23, V.22bis, V.22, V.21 ITU-T Data Transmit StandardsBell：212A, 103Automatic speed detectionSupport V.17, V.29, and V.27ter Group III fax protocolData Compression V.42bis (4：1) MNP Class5(2：1)Error c