Quectel EC25 User Manual

LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 189 / 231
12.2. AT+CMUT Mute Control
The command is used to enable/disable the uplink voice muting during a voice call.
Parameter
This parameter will not be saved and must be set during the call.
12.3. AT+QAUDLOOP Enable/Disable Audio Loop Test
The command is used to enable/disable audio loop test.
AT+CMUT Mute Control
Test Command
AT+CMUT=?
Response
+CMUT: (list of supported <n>s)
OK
Read Command
AT+CMUT?
Response
+CMUT: <n>
OK
Write Command
AT+CMUT=<n>
Response
OK
If there is any error related to ME functionality:
+CME ERROR: <err>
Maximum Response Time
300ms
Reference
3GPP TS 27.007
<n> 0 Mute OFF
1 Mute ON
AT+QAUDLOOP Enable/Disable Audio Loop Test
Test Command
AT+QAUDLOOP=?
Response
+QAUDLOOP: (0,1)
NOTE

Quectel EC25 Specifications

General

Category	LTE Module
LTE TDD	B38/B40/B41
WCDMA	B1/B5/B8
GSM	850/900/1800/1900 MHz
Data rates	LTE Cat 4: 150 Mbps DL/50 Mbps UL
GNSS	GPS/GLONASS/BeiDou/Galileo/QZSS
Operating Temperature	-40°C to +85°C
Form Factor	LCC
Storage Temperature	-45°C to +90°C
SIM Interface	1.8V/3.0V
Antenna Interface	Main, Diversity, GNSS
LTE FDD	B1/B3/B5/B7/B8/B20
Interfaces	USB 2.0, UART, PCM, GPIO
Operating Voltage	3.3V - 4.3V
Protocols	TCP/IP, UDP, FTP, HTTP, HTTPS
Certifications	CE, FCC, PTCRB, GCF, RCM, IC