EXM-31 Hardware ReferencePage 244 4&G1 550 Hz guard tone.&G2 1800 Hz guard tone.Result Codes:OK n=0,1,2.Error Otherwise.&Kn Select Flow ControlThis command selects the flow control method the modem chip set provides to theDTE to prevent the modem’s buffer from overflowing with data. A data buffer holdsthe data until the modem is ready to transmit it. When the data buffer is full, flowcontrol instructs the DTE to stop sending to the modem while the modem continuesto send characters.&K0 Disable flow control.&K1 Reserved.&K2 Reserved.&K3 Enable bidirectional hardware flow control (RTS/CTS).&K4 Enable bidirectional XON/XOFF flow control.&K5 Reserved.Result Codes:OK n=0,3,4Error Otherwise&Ln Dial Up./Lease Line OptionThis command is used to select between dial-up operations or leased-line operations.&L0 Dial Line.&L1 Leased Line.Result Codes:OK n=0,1.Error Otherwise.&Mn Asynchronous ModeThis command is used to select the communication mode.On-Line State Idle State
