User Manual

Appendix C Hayes AT Command Reference
RFI-9256 Radio Modem User Manual Page 88 of 96
C.3.2 “AT%22” Set Menu Password
The RFI-9256 menu system can be password protected in order to prevent unauthorized access. A password
can be between 1 and 12 alphanumeric characters. If the password is already set, then this command will not
change it.
 AT%22=password<CR> : Sets the menu access password to “password”.
C.3.3 “AT%62” Set RTC Date/Time
The real-time clock time can be set via the AT%62 command. This sets the time of day in seconds since
midnight, in the range 0 to 86400.
 AT%62=120<CR> : Sets real-time clock to 2 minutes since midnight.
C.4 Other Commands
The RFI-9256 supports many other AT commands. Most of these commands are common to many PSTN
modems, however do not provide any function on the RFI-9256. They are only supplied for compatibility
with existing systems. The list of commands supplied for compatibility only are given in the summary of
commands in the next section.
C.5 Summary of Commands
The following section provides a summary of all AT commands supported by the RFI-9256. Each of these
tables has the following headings:
 Command : The actual AT command.
 Description : A brief description of the command functionality.
 Last on Line : A cross,  , indicates that the command must be the last on the line for it to be
executed.
 &W : A cross,  , indicates that the change will not become active until the AT&W command is
executed.
 &W1 : A cross,  , indicates that the change will not be saved in non-volatile memory until the
AT&W or AT&W1 command is executed.
 Compat : A cross,  , indicates that the command is supplied for compatibility only and does not
perform any actual function.
Command Description Last on Line &W &W1 Compat
A
Answer a call.

D
DT
Dial a number.
