AT$H2

On     Go online command, 0 or 1 = Resume Online and Retrain, 3 =    

       Resume Online and Rate renegotiate                             

P      Select Pulse Dialing Method.                                  

Qn     Result codes, *0 = Send Result Codes, 1 = Do Not Send Result  

       Codes, 2 = No Result Codes on Answer.                          

Sn=    Write To An S-register                                        

Sn?    Read An S-Register                                            

T      Select Tone Dialing Method                                    

Vn     Display result codes, 0 = Results as Digits, 1 = Results as   

       Words                                                          

W0 *   No Negotiation Progress Messages                              

W1     Progress Messages Report DTE Speed                            

W2     Progress Messages Report DCE Speed                            

X0     Basic Result Codes                                            

X1     Busy and dial tone detect disabled, result codes 0-5 enabled  

X2     X1 + Dialtone Detection                                       

X3     Busy enabled, Dial tone disabled, result codes 0-5,7 enabled  

X4 *   X1 + Dialtone & Busy Detection                             

Yn     Select Long Space Disconnect: *0 = Ignore Long Space, 1 =     

       Respond to Long Space Disconnect                               
 
Zn     Perform Soft Reset, 0 = Reset and Recall Profile 0,           

       1 = Reset and Recall Profile 1                                

&An Select Role for Autoanswer Mode, *0 = Answer in Answer Mode, 1 

       = Answer in Originate Mode