Huawei MC509 Instructions for Use, Overview of AT Command Interfaces, A command or a response

HUAWEI MC509 CDMA LGA Module
AT Command Interface Specification	Overall Description

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, operator name and error messages).

When an AT command is sent, string parameters can be placed inside quotation marks or not.

1.4 Overview of AT Command Interfaces

1.4.1Description of AT Commands

An AT command controls the rules for interaction between the TE such as PC and MT such as MS. Figure 1-1shows the interaction between the TE and MT.

Figure 1-1Interaction between the TE and MT

Issue 01 (2011-08-26)	Huawei Proprietary and Confidential	18
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