Specifications

AirPrime UMTS / LTE MC/SL-Series Extended AT Command Reference
168 Proprietary and Confidential 2130616
!AVEC
Supporting chipsets (voice-
enabled devices only):
• MDM8200A (min f/w rev:
T3_0_1_5)
Note: This command is not
password protected.
Note: For MDM6200, MSM6290,
and QSC6270, see !AVEC on
page 139.
Set/report the echo cancellation setting
Set the echo cancellation mode for the specified voice profile. The echo canceller
detects and removes audio that echoes back from the far end of the voice
conversation.
This setting is stored in non-volatile memory and persists across power cycles.
The change takes effect immediately if used on the active profile, or after the modem
restarts if used on a different profile.
Usage:
• Execution: AT!AVEC=<profile>, <value>
Response:
OK
Purpose: Set the echo cancellation mode for the specified <profile>
• Query: AT!AVEC?<profile>
Response:
<value>
OK
Purpose: Return the echo cancellation mode (<value>) for the specified
<profile>
• Query list: AT!AVEC=?
Purpose: Return a list of supported modes (<value> ).
Parameters:
<profile> (Voice profiles)
• Valid range: 0–2 (See !AVSETDEV on page 173 for available profiles.)
<value> (Echo cancellation (EC) mode)
• 0=EC Default
• 1=EC I2S mode
• 2=EC handset mode
!AVMODESET
Supporting chipsets (voice-
enabled devices only):
• MDM8200A (min f/w rev:
R0.2.15.0)
Note: This command is not
password protected.
Select codec mode
Select the I2S audio codec mode—test mode (WM8904 only), or commercial mode
(any codec).
Usage:
• Execution: AT!AVMODESET=<value>
Response:
OK
Purpose: Select the I2S audio codec mode.
• Query: AT!AVMODESET?
Response:
!AVMODESET: <value>
OK
Purpose: Return the current I2S audio codec mode.
• Query list: AT!AVMODESET=?
Purpose: Return the command format and supported <values>.
Parameters:
<value> (Codec mode)
• 0=WM8904 test mode (Default value)
• 1=Commercial mode (Any codec)
Table 8-2: I2S audio command details (Continued)
Command Description