Dtr Hang Up Data Services; Reference Process; Troubleshooting; Dcd Pin Control - Huawei MU609 Application Manual

HUAWEI MU609 HSPA LGA Module
Application Guide

3.2 DTR Hang Up Data Services

3.2.1 Reference Process

Command
AT&D0
OK
AT&D2
OK
Note:

3.2.2 Troubleshooting

Scenario
AT&D1

3.3 DCD Pin Control

3.3.1 Reference Process
Command
AT&C0
OK
Issue 02 (2013-09-18)
Description
Establish a dial-up connection through a serial port for data
services. After this command is executed, data can be
transferred properly.
This command is used to configure the action to be
executed when DTR pin is high level or low level. Which is:
After AT&D2 is executed, when DTR pin is high level, data
will be transmitted normally; when DTR pin is low level, data
transmission will be terminated.
At present, only AT&D0 and AT&D2 are supported. AT&D1 is not supported.
Possible Error
Information
AT&D1
ERROR
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Serial Port Configuration Application Scenarios
Solution
At present, only AT&D0 and AT&D2
are supported. AT&D1 is not
supported.
Description
Set the DCD pin to be always valid regardless of
data services.
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