Specifications

3GPPTS27.007ATCOMMANDS
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91 HSPA+ATCommandsReferenceGuide
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AutomaticTimeZoneUpdate+CTZU
Thiscommandenablesanddisablesautomatictimezoneupdate throughNITZ.
Readcommandreportsthecurrentlyselected<onoff>intheformat:
+CTZU:<onoff>
Testcommandreportsthesupportedrangeofvaluesforparameter<onoff>.
Syntax
Command Commandtype
AT+CTZU=<onoff>
AT+CTZU? Read
AT+CTZU=? Test
ParametersandValues
<onoff> 
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(o
r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<mode>.
Testcommandreturnsthesupportedvaluesfortheparameter<mode>ascompoundvalue.
+CALM:(0‐2)
Syntax
Command Commandtype
AT+CALM=<mode> Set
AT+CALM? Read
AT+CALM=? Test
ParametersandValues
<mode> 
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.