Command FunctionH1 Force modem off-hook (make busy)Note: H1 command is not supported for ItalyI_ I0 Display product-identification codeI1 Factory ROM checksum testI2 Internal memory testI3 Firmware IDI4 Reserved IDL_ L0 Low speaker volumeL1 Low speaker volumeL2 Medium speaker volumeL3 High speaker volumeM_ M0 Internal speaker offM1 Internal speaker on until carrier detectedM2 Internal speaker always onM3 Internal speaker on until carrier detected andoff while dialingN_ Included for compatibility only, provides noeffectO_ O0 Return to Data ModeO1 Return to Data Mode and initiate an equalizerretrainP Set Pulse dial as defaultQ_ Q0 Modem sends responsesSr? Read and display value in register r.Sr=n Set register r to value n (n = 0-255).T Set Tone Dial as defaultV_ V0 Numeric responsesV1 Word responsesW_ W0 Report DTE speed onlyW1 Report line speed, error correction protocol,and DTE speed.W2 Report DCE speed onlyX_ X0 Hayes Smartmodem 300 compatibleresponses/blind dialing.X1 Same as X0 plus all CONNECTresponses/blind dialingX2 Same as X1 plus dial tone detectionX3 Same as X1 plus busy detection/blind dialingX4 All responses and dial tone and busy signaldetectionZ_ Z0 Reset and retrieve active profile 0Z1 Reset and retrieve active profile 186 User Guide
