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SARA-R4 series-AT commands manual
UBX-17003787 - R16
13Packet switched data services
Page 149 of 401
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 [68].
13.13EPS network registration status +CEREG
+CEREG
Modules All products
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
full No No No - +CME Error
13.13.1Description
Configures the network registration URC related to EPS domain. 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>][,,[,[<Assigned_Active_Time>,[<Assigned_Periodic_TAU>]]]]]
when <n>=4 if there is a change of the network cell in E-UTRAN
• +CEREG: <stat>[,[<tac>],[<ci>],[<AcT>][,[<cause_type>],[<reject_cause>][,[<Assigned_Active_Time>,
[<Assigned_Periodic_TAU>]]]]] when <n>=5 and the value of <stat> changes
SARA-R410M-02B / SARA-R410M-52B / SARA-R412M
When <n>=4 if there is a change of the network cell in E-UTRAN, the +URC assumes the following syntax:
• +CEREG: <stat>[,[<tac>],[<rac_or_mme>],[<ci>],[<AcT>][,,[,[<Assigned_Active_Time>,[<Assigned_
Periodic_TAU>]]]]]
The parameters <AcT>, <tac>, <rac_or_mme>, <ci>, <cause_type>, <reject_cause>, <Assigned_Active_Time>
and <Assigned_Periodic_TAU> are provided only if available.
The read command returns always at least the mode configuration (<n>), the EPS registration status (<stat>).
The location parameters <tac>, <rac_or_mme>, <ci> and <AcT>, if available, are returned only when <n>=2,
<n>=3, <n>=4 or <n>=5 and the MT is registered with the network. The parameters <cause_type>, <reject_
cause>, if available, are returned when <n>=3 or <n>=5. The PSM related parameter <Assigned_Active_