AT$H3

&Bn Enable/Disable Auto Retrain, 0 = Disable Automatic Retrain, *1 = 

       Enable Automatic Retrain                                          

&Cn Data Carrier Detect Option, *0 = Carrier Detect On, 1 = Track    

       Carrier Detect, 2 = Carrier Detect on Except Hangup               

&Dn Select Data Terminal Ready Option, *0 = Ignore DTR, 1 = Track    

       DTR, Command Mode, 2 = Carrier Detect On Except Hangup, 3 = Track 

       DTR, Reset if DTR Off                                             

&F  Restore Factory Profile                                          

&Gn Guard Tone Option, 0 = Disabled, *2 = 1800 Hz guard tone         

&Jn A/A1 lead function: *0 = Disable, 1 = Enable                     

&Kn Flow Control, 0 = No Flow Control, *3 = RTS/CTS Flow Control, 4 = 

       XON/XOFF, 5 = Transparent Flow Control, 6 = XON/XOFF Flow Control 

       with Remote XON/XOFF Flow Control                                 

&Qn Communications Mode, 0 = Async mode, 1 = Sync mode 1, 2 = Sync   

       mode 2, 3 = Sync mode 3, 4 = Sync mode 4, * 5 = Error-Control 6 = 

       Buffered Async, 8 = MNP, 9 = V.42bis/MNP2-4                       

&Rn RTS/CTS Option, *0 = CTS tracks RTS, 1 = On While Online         

&Sn Data Set Ready Option, *0 = Always On, 1 = On at Start of        

       Handshake, 2 = On at End of Handshake                             

&V  View Configuration Profiles                                      

&V8 Connect Details                                                  

&Wn Store Active Profile, 0 = Store Profile 0, 1 = Store Profile 1   

&Xn Sync Transmit Clock Source, *0 = Modem, 1 = DTE,                 

       3 = Carrier                                                      

&Yn Stored Profile For Hard Reset, *0 = Profile 0, 1 = Profile 1     

&Zn Store Telephone Number, (n = 0-4)