NB-IoT Module Series
BC95 AT Commands Manual
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3.6. AT+CSCON Signalling Connection Status
This command gives details of the terminal‟s perceived radio connection status (i.e. to the base station). It
returns an indication of the current state. Please note that this state is only updated when radio events,
such as sending and receiving, take place. This means that the current state may be out of date. The
terminal may think it is "Connected" yet cannot currently use a base station due to a change in the link
quality.
The set command controls the presentation of an unsolicited result code +CSCON. If <n>=1, +CSCON:
<mode> is sent from the MT when the connection mode of the MT is changed. If <n>=2 and there is a
state within the current mode, +CSCON: <mode>[,<state>] is sent from the MT. If <n>=3, +CSCON:
<mode>[,<state>[,<access>]] is sent from the MT. If setting fails, an MT error, +CME ERROR: <err> is
returned. Refer to
Chapter 6
for possible <err> values.
When the MT is in UTRAN or E-UTRAN, the mode of the MT refers to idle when no PS signalling
connection and to connected mode when a PS signalling connection between UE and network is setup.
When the UE is in GERAN, the mode refers to idle when the MT is in either the IDLE state or the
STANDBY state and to connected mode when the MT is in READY state.
The <state> value indicates the state of the MT when the MT is in GERAN, UTRAN connected mode or
E-UTRAN.
The read command returns the status of result code presentation and an integer <mode> which shows
whether the MT is currently in idle mode or connected mode. State information <state> is returned only
when <n>=2. Radio access type information <access> is returned only when <n>=3.
Test command returns supported values as a compound value.
AT+CSCON Signalling Connection Status
Set Command
AT+CSCON=[<n>]
Response
OK
+CME ERROR: <err>
Read Command
AT+CSCON?
Response
+CSCON:<n>,<mode>[,<state>]
OK
+CME ERROR: <err>
Test Command
AT+CSCON=?
Response
+CSCON:
(list of supported <n>s)
OK
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