Reference Information 
  Modem Reference Information 
    Corporate Evaluator’s Guide  201 
Command Function (Ambit) 
&D2  Interpret DTR On-to-OFF transition per &Qn 
&Q0 through &Q6: The modem hangs up 
&D3  Interpret DTR On-to-OFF transition per &Qn 
&Q0, &Q1, &Q4, &Q5, &Q6: Soft reset 
&Q2, &Q3: The modem hangs up 
&F0  Restore factory configuration 0 
&F1  Restore factory configuration 1 
&G0  Disable guard tone 
&G1  Disable guard tone 
&G2  Enable 1800 Hz guard tone 
&J0  Set S-Register response only for compatibility 
&J1  Set S-Register response only for compatibility 
&K0  Disable DTE/DCE flow control 
&K3  Enable RTS/CTS DTE/DCE flow control 
&K4  Enable XON/XOFF DTE/DCE flow control 
&K5  Enable transparent XON/ XOFF low control 
&K6  Enable both RTS/CTS and XON/XOFF flow control 
&L0  Select dial up line operation 
&M0  Select direct asynchronous mode 
&M1  Select sync connect with async off-line command mode 
&M2  Select sync connect with async off-line command mode and enable DTR dialing of directory zero 
&M3  Select sync connect with async off-line command mode and enable DTR to act as Talk/Data switch 
&P0  Set 10 pps pulse dial with 39%/61% make/break 
&P1  Set 10 pps pulse dial with 33%/67% make/break 
&P2  Set 20 pps pulse dial with 39%/61% make/break 
&P3  Set 20 pps pulse dial with 33%/67% make/break 
&Q0  Select direct asynchronous mode 
&Q1  Select sync connect with async off-line command mode 
&Q2  Select sync connect with async off-line command mode and enable DTR dialing of directory zero 
&Q3   Select sync connect with async off-line command mode and enable DTR to act as Talk/Data switch 
&Q4  Select Hayes AutoSync mode 
&Q5  Modem negotiates an error corrected link 
&Q6  Select asynchronous operation in normal mode 
&R0  CTS tracks RTS (sync) or CTS is normally ON and will turn OFF only if required by flow control (async) 
&R1  CTS is always active (sync) or CTS is normally ON and will turn OFF only if required by flow control (async) 
&S0  DSR is always active 
&S1  DSR will become active after answer tone has been detected and inactive after the carrier has been lost 
&T0  Terminate any test in progress 
&T1  Initiate local analog loopback 
&T2  Returns ERROR result code 
&T3  Initiate local digital loopback 
&T4  Allow remote digital loopback (RDL)  
&T5  Disallow remote digital loopback request 
&T6  Request an RDL without self-test 
&T7  Request an RDL with self-test 
&T6  Request an RDL without self-test 
&T7  Request an RDL with self-test 
&T8  Initiate local analog loop with self-test 
&V  Display current configuration and stored profiles