Appendix A – Technical Reference
Main AT commands
1.Type the commands entirely in upper case or lower case but do not type commands using a combination of the two cases.
2.All commands, with the exception of A/ and +++,
are preceeded by the AT prefix and are executed after pressing the Enter/ Carriage Return key (<Enter>).
3.The maximum length of a command is 40 characters. The modem does not count the AT prefix character, the Enter key or spaces. On the other hand, it does count punctuation marks such as dashes and parentheses.
4.Any missing numeric parameter is considered to be equal to zero, for instance the disconnect command: ATH <Enter>, is equivalent to ATH0 <Enter>.
Sportster Winmodem 33600 & x2/56K - User's manual 37