HUAWEI MU509 HSDPA LGA Module
AT Command Interface Specification
Audio Commands
Issue 04 (2013-01-28)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
161
11.8.2
Description
This command is used to switch the echo canceller mode before a voice call.
The TEST command returns supported values as compound value.
11.8.3
Defined Values
<n>:
0: Close the echo canceller
1: Handset mode, mild echo, short delay (less than 16ms dispersion)
2: Headset mode, moderate echo, short delay (less than 16ms dispersion)
3: Carkit mode, loud echo, long delay (up to 64 ms dispersion)
4: Speakerphone mode, loud echo, long delay (default value)
5: Bluetooth headset mode, there is a lot of delay in the Bluetooth air interface,
definitely can
‟t be used for non-Bluetooth modes.
Resetting the module will not affect the value. Module updating will reset the value to
default value.
11.9 ^KEYTONE–Play Local DTMF Key Tone
11.9.1
Command Syntax
Command
Possible response(s)
^KEYTONE=<key>[,<d
uration>]
<CR><LF>OK<CR><LF>
In case of error:
<CR><LF>ERROR<CR><LF>
^KEYTONE=?
<CR><LF>^KEYTONE: (list of supported
<key>s)<CR><LF><CR><LF>OK<CR><LF>
11.9.2
Description
This command is used to play the DTMF key tone local.
The TEST command returns supported values as compound value.
11.9.3
Defined Values
<key>: ASCII character in the set 0
–9, #, *, A, B, C, D.
<duration>: 0 ms
–1000 ms. Integer type value with manufacturer specific range. Time
of the tone wil play. 0 means no stop (input this command with none 0 duration can
abort).