1)Chipset:Conexant CX11252 2)Data Mode - ITU-T V. 92 data mode with receive rates up to 56Kbps and transmit rates up to 48Kbps - ITU-T V. 42 LAPM and MNP 2-4 error correction - ITU-T V. 44, V. 42 bis and MNP 5 data compression 3)Fax Mode - Fax mode with send and receive rates up to 14. 4 kbps - ITU-T V. 17, V. 29, V. 27 ter, and V. 21 channel 2 - EIA/TIA 578 Class 1 and T. 31 Class 1. 0 commands