Notes, Cellular result codes +crc, Syntax – Synaccess Networks NP-0801DTM User Manual
Page 51: Parameters and values, Voice hung up control +cvhu

3GPP TS 27.007 AT COMMANDS
51
HSPA+ AT Commands Reference Guide
Notes
Reference: 3GPP TS 27.007, GSM 04.08.
Cellular Result Codes +CRC
Set command controls whether the extended format of incoming call indication is used.
Read command returns current value of the parameter
Test command returns supported values of the parameter
Syntax
Command
Command type
AT+CRC=[
Set
AT+CRC?
Read
AT+CRC=?
Test
Parameters and Values
0
Disables extended format reporting. Default: 0.
1
Enables extended format reporting:
When enabled, an incoming call is indicated to the TE with unsolicited result code
+CRING:
instead of the normal RING.
where
ASYNC ‐ asynchronous transparent data
SYNC ‐ synchronous transparent data
REL ASYNC ‐ asynchronous non‐transparent data
REL SYNC ‐ synchronous non‐transparent data
VOICE ‐ normal voice (TS 11)
Notes
Reference: 3GPP TS 27.007.
Voice Hung Up Control +CVHU
Set command selects whether ATH or "drop DTR" causes a voice connection to be disconnected.
Read command reports the current value of the
Test command reports the range of supported values for parameter
Syntax
Command
Command type
AT+CVHU=[
Set
AT+CVHU?
Read
AT+CVHU=?
Test