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HUAWEI MG323 GSM M2M Module
AT Command Interface Specification Overall Description
Issue 02 (2010-11-23)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
2
1.3 Instructions for Use
You are not advised to use various parameter values that are not described in this
document or not supported currently as described in this document.
The AT command parameters described in the following chapters are in two formats:
<> and [], which are described as follows:
<...> The parameter inside these angle brackets is mandatory. The <> does not
exist in a command.
[...] The parameter inside these square brackets is optional. The [] does not exist
in a command or a response.
<CR> Carriage return character. For details, see the description in S3.
<LF> Line feed character. For details, see the description in S4.
When an AT command is sent, the characters contained in the name and parameters
(excluding SMSs, phone book, and operator name) of the AT command are case
insensitive. All the characters contained in the result returned by the AT command
must be in upper case (excluding SMSs, phone book, and operator name).
When an AT command is sent, string parameters can be placed inside quotation
marks or not. The strings in the result returned by the AT command are placed inside
quotation marks.
1.4 Overview of AT Command Interfaces
1.4.1 Description of AT Commands
An AT command controls the rules for interaction between the TE such as PC and
MT such as MS.
Figure 1-1 shows the interaction between the TE and MT.
Figure 1-1 Interaction between the TE and MT
Figure 1-2 shows the basic organization format of the AT command line.