SUPRA DIAMOND SUPRASONIC 288 V+ Card Type Fax, Modem (synchronous/asynchronous), Voice Chip Set Rockwell Maximum Data Rate 28.8Kbps Maximum Fax Rate 14.4Kbps Data Bus External Fax Class Class I & II Data Modulation Protocol Bell 103/212A ITU-T V.21, V.22bis, V.23, V.32, V.32bis, V.34 Rockwell V.FC Fax Modulation Protocol ITU-T V.17, V.21, V.21CH2, V.27ter, V.29 Error Correction/Compression MNP5, MNP10, V.42, V.42bis [Image] CONNECTIONS Function Label Function Label Line out/in - Unidentified CN1 DC power CN4 Line in/out - Unidentified CN2 Power switch SW1 RS-232/422 CN3 DIAGNOSTIC LED(S) LED Color Status Condition RD Red On Modem is receiving data RD Red Off Modem is not receiving data SD Red On Modem is transmitting data SD Red Off Modem is not transmitting data Proprietary AT Command Set See document V1998 for a full command summary.