Command Lines (S registers)

The valid forms for Sregister commands are:

Command Line Form         Note                                                                           

AT Sn=<value><CR>     value is stored in Sn                                                          

AT Sn= <CR>           value 0 is assumed                                                             

AT S=<value><CR>      S0 is assumed                                                                  

AT S= <CR>            S0 and value 0 are assumed                                                     

AT =<value><CR>       last Sn is assumed                                                             

AT = <CR>             last Sn and value 0 are assumed                                                

AT Sn? <CR>         the value of Sn is sent to DTE                                                 

AT ? <CR>         last Sn is assumed AT S? <CR>S0 is assumed

Note: The symbols S, ?, and = are all separate commands. The number n is called the address.

Other commands may precede or follow Sregister commands, subject to the restrictions of the other commands.

In command lines, the numbers n and &ltvalue>are ASCII-coded decimal digits. The number of digits expressing n and <value>are limited only by the length of the resulting command line. Leading zeros in an Sregister address or value are echoed but ignored. Thus, S00012 is the same as S12 and S10=000025 is the same as S10=25. Modem Sregisters accept values up to 255 and may accept larger values.

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