Quectel EC25 User Manual

LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 203 / 231
These parameters will not be saved.
Example
AT+QLTONE=? //Query the range.
+QLTONE: (0,1),(100-4000),(0-1000),(0-1000),(0-15300000)
OK
AT+QLTONE=1,1000,200,300,3000 //Play a 1000Hz tone, play time is 200ms and mute time is
300ms. Total time is 3000ms.
OK
+QLTONE: 0
AT+QLTONE=0 //Stop playing.
OK
<period_on> Tone‟s play time. The range is 0-1000, the unit is ms.
<period_off> Tone‟s mute time. The range is 0-1000, the unit is ms.
<duration> Tone‟s total time. The ranges is 0-15300000, the unit is ms.
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