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The figure below shows the flow and structure configuration commands:
3.5
COMMAND TOKEN TYPES
3.5.1
Basic Syntax Command Format
The format of Basic Syntax commands (except for the D and S commands) is: <command>[<number>]
where:
<command> is either a single character, or the "&" character (IA5 2/6) followed by a single character.
Characters used in <command> are taken from the set of alphabetic characters.
<number> may be a string of one or more characters from "0" through "9" representing a decimal integer value.
Recommendation V.25 ver (07/97)
5.3.2 S-parameters
Commands that begin with the letter S constitute a special group of parameters known as "S-parameters". These differ from
other commands in important respects:
• The number following the S indicates the "parameter number" being referenced. If the number is not recognized as a valid
parameter number, an ERROR result code is issued.
• Immediately following this number, either a "?" or "=" character (IA5 3/15 or 3/13, respectively) appears:
"?" is used to read the current value of the indicated S-parameter.
"=" is used to set the S-parameter to a new value. "<parameter_number>"
"<parameter_number" =[<value>]
If the "=" is used, the new value to be stored in the S-parameter is specified in decimal form following the "=".
98-08901C68-O
ATEx
ATQx
Figure 10. Flow and Structure Configuration Commands
A
T
C
M
D
2
=
A
T
C
M
D
2
=
<CR>
<LF>
O
K
<CR>
ATS5=x
ATVx
A
T
T
C
M
D
A
T
C
M
D
1
<CR>
<CR>
<LF>
O
K
<CR>
Introduction to AT Commands
ATS3=x
1
2
<CR>
1
2
<CR>
<LF>
ATS4=x
1
<CR>
<LF>
33
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