HUAWEI MU609 HSPA LGA Module
Application Guide
External Protocol Stack Application Scenarios
Issue 02 (2013-09-18)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
27
4.1.2
Troubleshooting
Scenario
Possible Error Information Solution
AT+CGATT?
+CGATT: 0
OK
The UE does not obtain any
PS domain services.
Run
AT+CGATT=1
to manually
attach to the PS domain. If
attaching to the PS domain still
fails or time out (refer to 3GPP
TS 24.008 4.7.3), refer to
section 2.3.
4.2 Establishing Data Connections
Reference process 1:
Command
Description
ATD*99#
*99#
is the dial string. This command is usually used
in Windows and only used in the modem port.The
UE switches from command mode to data mode.
After the TE starts the PPP negotiation process, the
UE automatically performs the actions (including PS
domain attaching and PDP activation) required for
establishing data connections.
CONNECT xxx
CONNECT
indicates that the data service dial-up
command is being processed by the module. xxx
indicates the data rate, which depends on the
network standard and capability level.
Reference process 2:
Command
Description
AT+CGDATA="PPP",1
This command is equivalent to
ATD*99#
. This
command is usually used in the Android Radio
Interface Layer (RIL).
CONNECT