Automatic time zone update +ctzu, Syntax, Parameters and values – Synaccess Networks NP-0801DTM User Manual
Page 91: Notes, Alert sound mode +calm

3GPP TS 27.007 AT COMMANDS
91
HSPA+ AT Commands Reference Guide
Automatic Time Zone Update +CTZU
This command enables and disables automatic time zone update through NITZ.
Read command reports the currently selected
+CTZU:
Test command reports the supported range of values for parameter
Syntax
Command
Command type
AT+CTZU=
AT+CTZU?
Read
AT+CTZU=?
Test
Parameters and Values
0
Disable automatic time zone update via NITZ. Default: 0.
1
Enable automatic time zone update via NITZ
Notes
The command AT+CTZU=1 enables automatic update of the date and time set by AT+CCLK command (not only
time zone). This happens when a Network Identity and Time Zone (NITZ) message is sent by the network. This
command is the ETSI standard equivalent of Telit custom command AT#NITZ=1. If command AT+CTZU=1, or
AT#NITZ=1 (or both) is issued, NITZ message causes a date and time update.
Alert Sound Mode +CALM
Set command selects the general alert sound mode of the device.
Read command returns the current value of parameter
Test command returns the supported values for the parameter
+CALM: (0‐2)
Syntax
Command
Command type
AT+CALM=
Set
AT+CALM?
Read
AT+CALM=?
Test
Parameters and Values
0
Normal mode.
1
Silent mode. No sound is generated by the device, except for alarm sound.
2
Stealth mode. No sound is generated by the device.
Note: If silent mode is selected, incoming calls do not produce alerting sounds but
only the unsolicited messages RING or +CRING.