Quectel EC25 User Manual

LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 93 / 231
Parameter
7.5. AT+CHUP Hang up Call
The command cancels all voice calls in the state of Active, Waiting and Held. For data connections, use
ATH.
Example
RING //Incoming call
AT+CHUP //Hang up the call
OK
7.6. +++ Switch from Data Mode to Command Mode
The +++ character sequence causes the module to switch from data mode to command mode. It allows
inputting AT commands while maintaining the data connection with the remote device.
<mode> 0 ATH can be used to disconnect the voice call.
1 ATH is ignored but OK response is returned.
AT+CHUP Hang up Call
Test Command
AT+CHUP=?
Response
OK
Execution Command
AT+CHUP
Response
OK
ERROR
Maximum Response Time
90s, determined by network.
Reference
3GPP 27.007
+++ Switch from Data Mode to Command Mode
Execution Command
+++
Response
This command is only available when TA is in data mode. The
“+++” character sequence causes the TA to cancel the data
flow over the AT interface and switch to command mode. This
allows entering AT command while maintaining the data
connection with the remote server or, accordingly, the GPRS

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