Quectel EC25 User Manual

LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 192 / 231
Parameter
These parameters will not be saved.
12.6. AT+QAUDMOD Set Audio Mode
The command sets the audio mode required for the connected device. It will take effect at next sound
activity.
Write Command
AT+VTD=<duration>[,<interval>]
Response
OK
ERROR
If there is any error related to ME functionality:
+CME ERROR: <err>
Maximum Response Time
300ms
Reference
3GPP TS 27.007
<duration> The duration tone in 1/10 seconds with tolerance. The value ranges from 0 to
255, and the default is 3. If the duration is less than the minimum time
specified by the network, the actual duration will be network specified time.
<interval> The time interval of two tones when sending multiple tones at a time by
AT+VTS. The value ranges from 0 to 255, and the default is 0.
AT+QAUDMOD Set Audio Mode
Test Command
AT+QAUDMOD=?
Response
+QAUDMOD: (list of supported <mode>s)
OK
Read command
AT+QAUDMOD?
Response
+QAUDMOD: <mode>
OK
Write Command
AT+QAUDMOD=<mode>
Response
OK
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