User Manual

Table Of Contents
SARA-R4 series-AT commands manual
UBX-17003787 - R16
7Network service
Page 48 of 401
If the antenna is not connected, then the information text response to the test command is: +COPS: ,,
(0-4),(0-2)
If no network is available, the test command returns an error result code.
SARA-R410M-02B
<AcT>=8 is used for LTE Cat M1 on SARA-R410M-02B-00.
SARA-R410M-01B
<AcT>=8 is used for LTE Cat M1.
7.6Radio Access Technology (RAT) selection +URAT
+URAT
Modules All products
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
partial No NVM / OP No <10 s +CME Error
7.6.1Description
Allows to select the Radio Access Technologies (RAT) to be activated at next registration cycle and, in case of
multi-RAT configuration, defines the RAT priority order.
Depending on how many parameters are specified, it is possible to select single or multi-RAT behaviour. The
order of the RAT parameters defines the priority of the related radio access technologies selected at boot
or when entering full functionality from de-registered state. The <1stAcT> parameter identifies the RAT to
be selected firstly. If <2ndAcT> parameter is specified, it determines which RAT is selected if no cellular
service can be obtained by the module on the <1stAcT>. If <3rdAcT> parameter is specified, it determines the
remaining RAT selected when no service can be obtained in the preferred one(s).
Any change in the RAT settings require the reboot of the module via AT+CFUN=15 to make the setting
effective.
u-blox cellular modules are certified according to all the capabilities and options stated in the Protocol
Implementation Conformance Statement document (PICS) of the module. The PICS, according to 3GPP
TS 51.010-2 [65], 3GPP TS 34.121-2 [66], 3GPP TS 36.521-2 [93] and 3GPP TS 36.523-2 [94], is a statement
of the implemented and supported capabilities and options of a device. If the user changes the command
settings during the certification process, the PICS of the application device integrating a u-blox cellular
module must be changed accordingly.
In dual mode and tri mode, due to lack of inter-RAT coordination, only the Access Stratum protocol of the
current selected RAT is active.
SARA-R4
Every 60 minutes a periodic PLMN scan is performed whenever the module is attached to the <2ndAcT>
(or to the <3rdAcT>); if the current RPLMN is found on the <1stAcT> (or on the <2ndAcT>), the module
will select the higher priority RAT and register on it.
7.6.2Syntax
Type Syntax Response Example
Set AT+URAT=<1stAcT>[,<2ndAcT>[,
<3rdAcT>]]
OK AT+URAT=7,8
OK
Read AT+URAT? +URAT: <1stAcT>[,<2ndAcT>[,
<3rdAcT>]]
OK
+URAT: 7
OK
Test AT+URAT=? +URAT: (list of the supported
<1stAcT>s)[,(list of the supported
<2ndAcT>s)[,(list of the supported
<3rdAcT>s)]]
OK
+URAT: (7-9),(7-9),(7-9)
OK