... Data Operation Up to 56kbps Specification:Data modem l ITU-T V.92,V.90,K56flex,V ... 21;Bell 212A and Bell 103 l Quick connect l Modem-on-hold l V.250 and V.251 ... error correction Fax modem l V.17,V.29,V.27ter,and V.21 l EIA/TIA 578 Class 1 ... and T.31 Class 1.0 commands l Telephony/remote TAM l V. ... 253 commands l 8-bit u-Law/A ...