Ublox SARA-R4 Series - EPS Network Registration Status +CEREG

SARA-R4/N4 series-AT Commands Manual
UBX-17003787 - R09
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13Packet switched data services
Page 138 of 307
Type Syntax Response Example
Read AT+CEMODE? +CEMODE: <mode>
OK
+CEMODE: 1
OK
Test AT+CEMODE=? +CEMODE: (list of supported
<mode>'s)
OK
+CEMODE: (0-3)
OK
13.12.3Defined values
Parameter Type Description
<mode> Number Mode configuration:
• 0: PS mode 2 of operation. The UE registers only to EPS services, and the UE's usage
setting is "data centric"
• 1 (default and factory-programmed value for voice capable devices): CS/PS mode
1 of operation. The UE registers to both EPS and non-EPS services, and the UE's
usage setting is "voice centric"
• 2 (default and factory-programmed value for voice not-capable devices): CS/PS
mode 2 of operation. The UE registers to both EPS and non-EPS services, and the
UE's usage setting is "data centric"
• 3: PS mode 1 of operation. The UE registers only to EPS services, and the UE's usage
setting is "voice centric"
13.12.4Notes
• A UE set to "Data centric" does not disable the E-UTRAN capability if voice services cannot be obtained.
Upon receiving combined EPS/IMSI attach accept or combined TA/LA Update accept with "SMS-only"
indication, a data centric UE stays in the current RAT and is not allowed to use CSFB. Upon receiving
combined EPS/IMSI attach accept or combined TA/LA Update accept with "CSFB Not Preferred"
indication, a data centric UE stays in the current RAT and is allowed to use CSFB.
• A UE set to "Voice centric" shall always try to ensure that Voice service is possible. A CSFB and an IMS/
CS-voice capable UE set to "Voice centric" unable to obtain voice service in E-UTRAN (e.g. CSFB and IMS
voice are not supported or the configured preferences on how to handle voice services prevent usage of
any available voice services), shall disable the E-UTRAN capability, which results in re-selecting GERAN
or UTRAN. The E-UTRAN capability is re-enabled by the UE under the conditions described in 3GPP TS
24.301 [88].
• If +CEMODE is set to EPS-only (<mode>=0 or <mode>=3) the +CGCLASS command setting is
automatically updated to class "CG".
SARA-R4 / SARA-N4
• The set command is not supported. The operation mode for EPS is network operator specific and handled
via the +UMNOPROF command.
13.13EPS network registration status +CEREG
+CEREG
SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412MModules
SARA-N4
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
full No No No - +CME Error
13.13.1Description
Controls the presentation of the network registration URC. The URC assumes a different syntax depending on
the network and the <n> parameter:
• +CEREG: <stat> when <n>=1 and there is a change in the MT's EPS network registration status in E-UTRAN
• +CEREG: <stat>[,[<tac>],[<ci>],[<AcT>]] when <n>=2 and there is a change of the network cell in EUTRAN
• +CEREG: <stat>[,[<tac>],[<ci>],[<AcT>][,<cause_type>,<reject_cause>]] when <n>=3 and the value of
<stat> changes
• +CEREG: <stat>[,[<tac>],[<ci>],[<AcT>][,,[,[<Active_Time>],[<Periodic_TAU>]]]] when <n>=4 if there is a
change of the network cell in E-UTRAN