Programming InterfacePage 254 4&M0 Async Normal&M1 Sync Normal&M2 Sync Dial when DTR = 1&M3 Sync Talk/Data, DTR = 0/1Result Codes:OK n=0,1,2,3Error Otherwise&Pn Dial Pulse RatioThis command determines the make/break ratio used during pulse dialing.&P0 Make = 39%, Break = 61% for use in the United States.&P1 Make = 33%, Break = 66% for use in some other countries.Result Codes:OK n=0,1.Error Otherwise.&Qn Communication Mode OptionThis command will select the communication mode. It determines how the chip setwill treat transmit and receive data while in the on-line state and establishes certaincall setup procedures.On-Line State Idle State&Q0 Async Normal&Q1 Sync Normal&Q2 Sync Dial when DTR = 1, Hang up when DTR = 0&Q3 Sync Talk/Data, DTR = 0/1&Q4 AutoSync if applicableResult Codes:OK n=0,1,2,3,4.Error Otherwise.&Rn CTS/RTS Option (non-CTS flow control mode)The functions of CTS and RTS are determined by this command.
