HUAWEI MU609 HSPA LGA Module
Application Guide
Concurrent Service Application Scenarios
Issue 02 (2013-09-18)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
100
13
Concurrent Service Application
Scenarios
13.1 Voice Calls and Text Messaging
On a GSM or WCDMA network, the module uses the same wireless channel to
establish voice calls and send text messages. Therefore, when the module provides
voice call and text messaging services at the same time, it may fail to make the voice
call or the message may be delayed.
Command
Description
ATD13912345;
Make a voice call to 13912345 from
the module.
OK
^ORIG: 2,0
AT+CMSS=0
Send the text message before the
voice call is connected.
^CEND: 1,0,100,17
+CMSS: 36
OK
The voice call is hung up because the
user is busy.
Note:
When a voice call has been connected, text messages can be sent without conflicting with the
voice call.