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- ITU-T V. 92 data mode with receive rates up to 56Kbps and transmit rates up to
48Kbps
- ITU-T V. 90 data mode with receive rates up to 56Kbps and transmit rates up to
V. 34 rates
- ITU-T V. 34, V. 32 bis, V. 32, V. 22 bis, V. 22, V. 23, and V. 21; Bell 212A and Bell
103
- ITU-T V. 42 LAPM and MNP 2-4 error correction
- ITU-T V. 44, V. 42 bis and MNP 5 data compression