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HUAWEI MC509 CDMA LGA Module

AT Command Interface Specification

Overall Description

Issue 01 (2011-08-26)

Huawei Proprietary and Confidential

Command

Type

Command Format

Description

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

command

<name>?

A read command is

executed to read the

current value of a

parameter.

test

command

<name>=?

A test command is

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.

1.4.3 Abort 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.

1.4.4 Rules 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