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.
7.5 Radio Access Technology (RAT) selURAT
+URAT
SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412M
Modules
SARA-N4
Syntax
PIN required
Settings saved Can be aborted
Response time Error reference
Attributes
partial
No
No
-
7.5.1 Description
Forces the selection of the Radio Access Technology (RAT) in the protocol stack. On the subsequent network
registration (
,
) 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
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 [
], 3GPP TS 34.121-2 [
], 3GPP TS 36.521-2 [
] and 3GPP TS 36.523-2 [
], 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).
7.5.2 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
7.5.3 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
