PRACTICAL PERIPHERALS, INC. PC144MT II/MC144MT II Modem Type Data (synchronous/asynchronous)/Fax Maximum Data Rate 14.4Kbps Maximum Fax Rate 14.4Kbps Data Bus External Fax Class Class I & II Data Modulation Protocol Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.32, V.32bis Fax Modulation Protocol ITU-T V.17, V.27ter, V.29 Error Correction/Compression MNP5, V.42, V.42bis [Image] CONNECTIONS Purpose Location Purpose Location Line in CN1 RS-232/422 CN4 Line out CN2 Power switch SW1 DC Power CN3 DIAGNOSTIC LED(S) LED Color Status Condition AA Red On Auto-answer enabled AA Red Off Auto-answer disabled AA Red Blinking Line is ringing RX Red On Modem is receiving data RX Red Off Modem is not receiving data TX Red On Modem is transmitting data TX Red Off Modem is not transmitting data CD Red On Carrier signal detected CD Red Off Carrier signal not detected CD Red Blinking Modem is retraining OH Red On Modem is off-hook OH Red Off Modem is on-hook HS Red On Modem connected at 4800bps or faster HS Red Off Modem connected at less than 4800bps TR Red On DTR signal is high TR Red Off DTR signal is low MR Red On Power on MR Red Off Power off Proprietary Command Set COMMAND SET DISABLE Type: Configuration Format: AT [cmds] %DUMBn [cmds] Example: AT %DUMB0 &W Description: Stops modem from responding to commands. Command Function » %DUMB0 Command set enabled. %DUMB1 Command set disabled. REDIAL Type: Immediate Format: AT [cmds] DL Example: AT M0 DL Description: Redials the last number called. REPORT INFORMATION Type: Immediate Format: AT [cmds] In [cmds] Example: AT IO Description: Commands modem to display information requested. Command Function I0 Reports modem model and speed. I1 Reports checksum number. I2 Reports checksum result. I3 Reports firmware version. I4 Reports current command settings.