NB-IoT Module Series
BC95 AT Commands Manual
BC95_AT_Commands_Manual Confidential / Released 14 / 58
If the UE wants to apply PSM for reducing its power consumption, the set command controls the
presentation of an unsolicited result code: +CEREG: <stat>[,[<tac>],[<ci>],[<AcT>][,[<cause_
type>],[<reject_cause>][,[<Active-Time>],[<Periodic-TAU>]]]] .
When <n>=4.The unsolicited result code will provide the UE with additional information for the Active
Time value and the extended periodic TAU value if there is a change of the network cell in E-UTRAN. The
value <n>=5 further enhances the unsolicited result code with <cause_type> and <reject_cause> when
the value of <stat> changes. The parameters <AcT>, <tac>, <ci>, <cause_type>, <reject_cause>,
<Active-Time> and <Periodic-TAU> are provided only if available.
The read command returns the status of result code presentation and an integer <stat> which shows
whether the network has currently indicated the registration of the MT. Location information elements
<tac>, <ci> and <AcT>, if available, are returned only when <n>=2 and MT is registered in the network.
The parameters [,<cause_type>,<reject_cause>], if available, are returned when <n>=3.
Test command returns values supported as a compound value.
Parameter
AT+CEREG EPS Network Registration Status
Set Command
AT+CEREG=[<n>]
Response
OK
+CME ERROR: <err>
Read Command
AT+CEREG?
Response
when <n>=0, 1, 2 or 3 and command successful:
+CEREG:
<n>,<stat>[,[<tac>],[<ci>],[<AcT>[,<cause_type>,<reject_
cause>]]]
when <n>=4 or 5 and command successful:
+CEREG:
<n>,<stat>[,[<lac>],[<ci>],[<AcT>],[<rac>][,[<cause_type>
],[<reject_cause>][,[<Active-Time>],[<Periodic-TAU>]]]]
OK
Test Command
AT+CEREG=?
Response
+CEREG:
(list of supported <n>s)
OK
<n>
Integer type
0 Disable network registration unsolicited result code
Quectel
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