Sony Ericsson TT4031 (SE-GM29) - Manual (Page 58)

Owner’s Manual Rev 1.0 Page 58 of 58
If the indicated <parameter> is not recognized, the result code ERROR is
issued.
NOTE! - Possible responses are indicated both as
<command>:(list of supported<parameter>) and (in most
cases) the actual range of the parameter values.
1.2.3 AT Response Syntax
The default mode response shown below, is in text mode. See the command
V for further details.
Possible formats for the result codes are:
Basic format result code, such as OK. The Basic result code also
has a numerical equivalent.
Extended format result code, prefixed with a plus sign (+) or an
asterisk (*):
–_ AT+<command>: <parameter >
–_ AT*<command>: <parameter>
where the <parameter> is the result code value, note that a single space
character separates the colon character from the <parameter>.If several
values are included in the result code, they are separated by commas. It
is also possible that a result code has no value. The extended syntax
result codes have no numerical equivalent. They are always issued in
alphabetical form.
Information text response may contain multiple lines separated
by <CR>. The TE detects the end of informational text responses
by looking for a final result code response, such as OK.
There are two types of result code responses as outlined below:
Final Result Code
A final result code indicates to the TE that execution of the command is
completed and another command may be issued.
If you type an implemented AT command, you should get the
result code OK.
If you type an AT command that is not implemented, or which
had the wrong parameter or syntax, you will get an error result
code. It is ERROR or, for example, +<command> ERROR
followed by an error code.
Final result codes are: