WM620 AT
Command Manual
Copyright © Neoway Technology Co., Ltd
47
<CR><LF>OK<CR><LF>
<CR><LF>ERROR<CR><LF>
Example
AT+ECHO=0
OK
Disable
the
echo
cancellation
function.
AT+ECHO=8
ERROR
The command is incorrect. The value
set is beyond the parameter value
range.
AT+ECHO?
+ECHO: 0
OK
Query the current settings.
AT+ECHO=2
OK
Enable the echo cancellation function
for the earphone.
Remarks
Echo cancellation function is implemented through the audio match
technology of the DSP chipset.
Obtain the echo delay parameter value by commissioning in real application.
This command is applicable to E9C33426 and later versions.
4.14 Sending USSD Data: +CUSD
Description
To send Unstructured Supplementary Service Data (USSD)
Format
AT+CUSD=<n>,<str>,<dcs><CR>
AT+CUSD?<CR>
AT+CUSD=?<CR>
Parameter
<n>:
0: Do not display the return code
1: Display the return code
2: Cancel the request
<str>: USSD string
<dcs>: 3GPP TS 23.038 [25] Cell Broadcast Data Coding Scheme in integer format
(default 15)
<m>:
0: no further user action required
1: further user action required
2: USSD terminated by network