Huawei MG323 manual AT&D Command for Setting the DTR Usage State

HUAWEI MG323 GSM M2M Module
AT Command Interface Specification	Commands for Serial Port Control

Execution AT&C[<value>] command

Function Sets the relation between the status of the DCD line and signal detection of the remote receiving line.

Response <CR><LF>OK<CR><LF>

Parameter description

<value>: integer; AT&C is equivalent to AT&C0.

z0: enables the DCD line.

z1 (default value): The DCD line is enabled only when data carrier exists.

4.3AT&D - Command for Setting the DTR Usage State

The AT&D command sets the result returned by the TA in data service state when the DTR circuit is disabled from enabling state.

Execution AT&D[<value>] command

Function Sets the result returned by the TA in data service state when the DTR circuit is disabled from enabling state.

Response <CR><LF>OK<CR><LF>

Parameter description

<value>: integer; AT&D is equivalent to AT&D0.

z0: The TA ignores the status of the DTR circuit.

z1: enters the command mode while holding the current data conversation.

z2 (default value): releases the data conversation and enters the command mode. When DTR=OFF, automatic response is disabled.

4.4AT&S – Command for Setting the DSR Usage State

The AT&S command sets the status of the DSR line according to different communication status of the ME.

Execution AT&S[<value>] command

Function Sets the status of the DSR line.

Response <CR><LF>OK<CR><LF>

Issue 02 (2010-11-23)	Huawei Proprietary and Confidential	38
	Copyright © Huawei Technologies Co., Ltd.