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3.7.2
Parameter Read Command Syntax
The terminal can determine the current value or values stored in a parameter by using the following syntax: +<name>?
3.7.3
Parameter Test Command Syntax
The terminal can test whether a parameter is implemented in the DCE, and determine the supported values, by using the
following syntax: +<name>=?
3.8
VALUES
3.8.1
Range of Values
When the action accepts a single numeric sub-parameter, or the parameter accepts only one numeric value, the set of supported
values may be presented in the information text as an ordered list of values.
The following are some examples of value range indications:
(0)
Only the value 0 is supported.
(1,2,3)
The values 1, 2, and 3 are supported.
(1-3)
The values 1 through 3 are supported.
(0,4,5,6,9,11,12)
The several listed values are supported.
(0,4-6,9,11-12)
An alternative expression of the above list.
3.8.2
Compound Range of Values
When the action accepts more than one sub-parameter, or the parameter accepts more than one value, the set of supported values
may be presented as a list of the parenthetically enclosed value range strings (described above), separated by commas.
For example, the information text in response to testing an action that accepts three sub-parameters, and supports various ranges
for each of them, could appear as follows: (0),(1-3),(0,4-6,9,11-12)
3.9
ABORTING COMMANDS
Some action commands that require time to execute may be aborted while in progress. This is explicitly noted in the description
of the command. Aborting a command is accomplished by transmitting any character from the terminal to the DCE. A single
character is sufficient to abort the command in progress. To ensure that the aborting character is recognized by the DCE, it
should be sent at the same rate as the preceding command line. The DCE may ignore characters sent at other rates. When an
aborting event is recognized by the DCE, it terminates the command in progress and returns an appropriate result code to the
terminal, as specified for the particular command.
When a command is aborted, this not mean that its operation is reversed. In the case of some network commands, when the abort
signal is detected by the g20, although the command is aborted following g20-network negotiation, the operation might be fully
completed, partially completed or not executed at all.
98-08901C68-O
Introduction to AT Commands
35
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