56K Data/Fax/Voice Modem SP3008EB 1xRJ11 (line), 1xRJ11 (phone), RS-232, microphone jack, speaker jack V.92Lite, V.90, V.34, V.32bis, V.32, V.22bis, V.22, V.23, and V.21, Bell 212A and Bell 103 modulation modes Quick connect V.44 data compression for optional downloading of Internet Web pages and files V.42 bis and MNP 5 data compression V.42 LAPM and MNP 2-4 error correction V.17, V.29, V.27ter, and V.21 channel 2 EIA/TIA 578 Class 1 and T.31 Class 1.0 commands Support Full Duplex voice function Support Telephone Answering Machine (TAM) Built-in speaker and phone jacks AT Command Set Support Windows 98/ME/NT/2000/XP/2003