Quectel UG Series

UMTS/HSPA Module Series
WCDMA UGxx AT Commands Manual
WCDMA_UGxx_AT_Commands_Manual Confidential / Released 90 / 247
7.3. ATH Disconnect Existing Connection
ATH 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
AT+CVHU 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 from line and terminate 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
Confidential