SARA-R4/N4 series-AT Commands Manual
UBX-17003787 - R09

7Network service
Page 45 of 307
SARA-R410M-01B / SARA-R410M-02B
•
<AcT>=8 is used for LTE Cat M1.
7.5î™–î™–î™–î™–Radio Access Technology (RAT) selection +URAT
+URAT
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
partial No NVM No - +CME Error
7.5.1î™–î™–î™–î™–Description
Forces the selection of the Radio Access Technology (RAT) in the protocol stack. On the subsequent network
registration (+COPS, +CGATT) the selected RAT is used.
If dual or tri mode is selected, it is also possible to select the preferred RAT, which determines which RAT is
selected first (if available). If the preferred RAT is omitted, it will be set by default to the higher RAT available.
If tri mode is selected, it is also possible to select the second preferred RAT (if the preferred RAT was also
selected). This parameter determines which RAT is selected if the first preferred RAT is not available.
Any change in the RAT selection must be done in the detached state issuing the AT+COPS=2 AT
command.
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 [84], 3GPP TS 34.121-2 [85], 3GPP TS 36.521-2 [115] and 3GPP TS 36.523-2 [116], 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, all the requested Access Stratum protocols are active and Inter-RAT
measurements as well as Inter-RAT handovers may be performed (if ordered by the network).
7.5.2î™–î™–î™–î™–Syntax
Type Syntax Response Example
Set AT+URAT=<SelectedAcT>[,
<PreferredAct>[,
<2ndPreferredAct>]]
OK AT+URAT=1,0
OK
Read AT+URAT? +URAT: <SelectedAcT>[,
<PreferredAct>[,
<2ndPreferredAct>]]
OK
+URAT: 1,2
OK
Test AT+URAT=? +URAT: (list of the supported
<SelectedAcT>s),(list of the
supported <PreferredAct>s),(list of
the supported <2ndPreferredAct>s)
OK
+URAT: (0-6),(0,2,3),(0,2,3)
OK
7.5.3î™–î™–î™–î™–Defined values
Parameter Type Description
<SelectedAcT> Number Indicates the radio access technology and may be:
• 0: GSM (single mode)
• 1: GSM / UMTS (dual mode)
• 2: UMTS (single mode)
• 3: LTE (single mode)
• 4: GSM / UMTS / LTE (tri mode)
• 5: GSM / LTE (dual mode)
• 6: UMTS / LTE (dual mode)
• 7: LTE CAT-M1
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