User Manual

Configuration
RFI-9256 Radio Modem User Manual Page 9 of 96
ATS<r>=<n><CR>
AT%<r>=<n><CR>
Where <r> is the register, and <n> is the data. The current value of an s-register or %-register can be
retrieved through a command of the form:
ATS<r><CR>
AT%<r><CR>
A list of all s-registers can be found in Appendix C.2, while all %-registers are listed in Appendix C.3.
RESPONSE CODES
Whenever an AT command is executed a response code is generated. Response codes can be either strings,
numbers, or be suppressed (not output to the user). The list of response codes generated by the RFI-9256 is
shown in Table 1.
Response
String
Response
Number
Description
OK
0 The command executed successfully.
CONNECT
1 A connection has been established between this radio and another radio.
RING
2 Another radio is ringing this radio and attempting to establish a connection.
NO CARRIER
3 A connection could not be established or it has been dropped.
ERROR
4 A command was formatted incorrectly.
BUSY
7
An attempt was made to dial a remote unit and it responded with a busy
signal.
NO ANSWER
8 An attempt was made to dial a remote unit but it could not be contacted
Table 1: AT response codes generated by the RFI-9256
3.3.2 Configuring the Radio
The radio uses s-registers to alter the configuration profile. Each s-register contains a decimal value, an
ASCII character or an ASCII string. The interpretation of each value differs with each s-register.
The radio allows the contents of the s-registers to be saved to non-volatile memory using the AT&W
command. The entire configuration profile will be retained after the radio has been powered off.
The radio also has factory default settings stored internally, allowing all communication settings and s-
register values to be set to the factory default configuration. The factory defaults have been selected so most
users will be able to make immediate use of their radio, with minimum changes. The default settings are
listed in Appendix D.