Huawei MC509 manual Abort Attributes of AT Commands

HUAWEI MC509 CDMA LGA Module
AT Command Interface Specification	Overall Description

Command	Command Format		Description
Type
		Note:
		If all parameters are omitted, the = symbol following <name>
		should be omitted. If <name> is not identified, this command
		does not exist. In this case, ERROR is returned. When <name>
		is identified, if a command that is not allowed to contain
		parameters contains parameters or a command that is allowed to
		contain parameters contains more parameters than the defined
		ones, "ERROR" or “+CME ERROR : operation not allowed” is
		returned.
	Read	<name>?	A read command is
	command		executed to read the
			current value of a
			parameter.
	test	<name>=?	A test command is
	command		executed to check the
			parameter range.
		Note:
		If the MS fails to identify <name>, the MT returns ERROR. If the
		MT can identify <name> and the contents returned by the
		command do not contain parameters, the MS returns OK. If the
		contents returned by the command contain parameters, the MS
		returns the value range of each parameter, and then returns OK.

1.4.3Abort Attributes of AT Commands

Abort means that the TE sends an instruction to abort a command when the command is being executed. An abort instruction must be sent before a command is completely executed. Therefore, the abort instruction is valid for a command whose execution consumes certain time; however, not all commands of this kind can be aborted. Whether a command can be aborted depends on the abort attribute of the command. Each AT command has its abort attribute, which is alternative. That is, the command is either abortive or not abortive. Abortive commands include certain basic commands and execution commands of action commands. Within 125 ms after the abortive commands are sent, no abort request is accepted. After 125 ms and before the commands are completely executed, if the module receives any character sent by the TE, the commands are aborted immediately.

1.4.4Rules for Running AT Commands

1.Each command line contains only one AT command and ends with a carriage return character, in addition to the basic standard commands such as 1, V, S3 etc. In principle, users are not allowed to run S3/S4 format modification commands. This rule is applicable to the communication between the MT and TE programs.

2.To increase the readability and regularity of command and response formats, in addition to the original interfaces specified in standards and protocols, all new interfaces must observe the following rule: No space is added to the end of commands such as the AT^XXX=<arg0>,<arg1> commands, or added to the end of the ^ symbol, colon, and comma. No redundant space is added ahead of

Issue 01 (2011-08-26)	Huawei Proprietary and Confidential	22
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