- ITU-T V.90/K56flex/V.34, V.32 bis, V.32, V.22 bis, V.22, V.23, V.21,
Bell 212A/103
- V.42 LAPM, MNP 2-4 error correction
- V.42 bis/MNP 5 data compression
- MNP 10EC™ enhanced cellular performance
- V.250 and V.251 commands
- V.17, V.29, V.27 V.21 channel 2
- EIA/TIA 578 Class 1, T.31 Class 1.0, EIA/TIA 578 Class 2 commands
