Quectel EC25 User Manual

LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 92 / 231
7.3. ATH Disconnect Existing Connection
The command disconnects circuit switched data calls or voice calls. AT+CHUP is also used to disconnect
the voice call.
Parameter
7.4. AT+CVHU Voice Hang up Control
The command controls whether ATH can be used to disconnect the voice call.
ATH Disconnect Existing Connection
Execution Command
ATH[n]
Response
Disconnect existing call by local TE from command line and
terminate the call.
OK
Maximum Response Time
90s, determined by network.
Reference
V.25ter
<n> 0 Disconnect existing call from command line and terminate the call
AT+CVHU Voice Hang up Control
Test Command
AT+CVHU=?
Response
+CVHU: (list of supported <mode>s)
OK
Read Command
AT+CVHU?
Response
+CVHU: <mode>
OK
Write Command
AT+CVHU=<mode>
Response
OK
ERROR
Maximum Response Time
300ms
Reference
3GPP TS 27.007

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