It does not accept any commands. You get there by executing a successful ATDT, or you return the modem from the online-command state by using the ATO command. Data transmission is temporarily suspended so that you can issue commands. To hang up the connection and go to the offline-command state, type ATH . The characters that follow AT can be any mixture of uppercase and lowercase, except where noted.
Commands end with a carriage return.
This tells the modem to execute the command. When you change the modem's settings, the change resides in the modem's dynamic memory. Some changes do not take effect until you reset your modem. Result codes also report the progress of a connection. This is particularly useful for verifying that Ricochet encryption is enabled.