User Manual

Configuration
RFI-9256 Radio Modem User Manual Page 8 of 96
3.3 Hayes AT Command Interface
The RFI-9256 supports many Hayes compatible commands enabling the user to fully control and operate the
radio, and in most cases emulate public switch telephone network (PSTN) modems.
Hayes commands may be entered manually through a terminal or automatically through dial-up network
applications and scripts. Most commands, with exception of the ‘%’ register and connection commands, may
be concatenated into a single command string. Commands or command strings must be terminated with a
carriage return (ASCII 13
D
, produced by the enter key).
3.3.1 The AT Commands
THE ATTENTION CODE
The attention commands are a group of commands recognised by the radio. All attention commands are
prefixed by the letters AT, and are referred to as AT commands. For example, the command:
ATI3<CR>
Causes the radio to return its firmware version information:
Firmware: 9256 Version 1.30 Rev.D Australia
OK
The attention code, along with all AT commands, is case insensitive.
MULTIPLE COMMANDS
Multiple commands can be placed after an AT provided that the total number of characters does not exceed
255. For example, a valid command to display the radio’s firmware version information and internal
temperature is:
ATI3I9<CR>
This results in the output:
Firmware: 9256 Version 1.30 Rev.D Australia
25.5c
OK
S-REGISTER AND %-REGISTER COMMANDS
S-registers and %-registers are used to store complex configuration parameters. In order to set the value of
an s-register or %-register the following format is used: