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SARA-R4/N4 series-AT Commands Manual
UBX-17003787 - R11
14System features
Page 156 of 308
• the requested GPRS READY timer value in GERAN/UTRAN
• the requested extended periodic TAU value in E-UTRAN
• the requested Active Time value
See the URCs provided by command +CEREG for the Active Time value and the extended periodic TAU value
that are allocated to the UE by the network in E-UTRAN.
Use the read command to get the assigned values from the network:
• If the power saving mode is enabled (+CPSMS: 1), everything on the device will power down except the
real-time clock (RTC) after the expiry of T3324 (Active Time). It will stay powered down until the expiry of
T3412 (Extended TAU Timer) or if the Power On line is toggled.
• If the power saving mode is disabled (+CPSMS: 0), the device will not enter Power Save Mode (PSM)
SARA-R4
The URCs provided by the +CEREG AT commands for the Active Time value and the extended periodic
TAU value are not supported.
SARA-R4
The read command will return the requested values. See the +UCPSMS AT command to get the values
assigned from the network.
14.7.2Syntax
Type Syntax Response Example
Set AT+CPSMS=[<mode>[,
<Requested_Periodic_RAU>[,
<Requested_GPRS_READY_timer>[,
<Requested_Periodic_TAU>[,
<Requested_Active_Time>]]]]]
OK AT+CPSMS=1,,,"01000011","010000
11"
OK
Read AT+CPSMS? +CPSMS: <mode>,[<Requested_
Periodic_RAU>],[<Requested_
GPRS_READY_timer>],
[<Requested_Periodic_TAU>],
[<Requested_Active_Time>]
OK
+CPSMS: 1,,,"01000011","01000011"
OK
Test AT+CPSMS=? +CPSMS: (list of supported
<mode>s),(list of supported
<Requested_Periodic_RAU>s),(list
of supported <Requested_GPRS_
READY_timer>s),(list of supported
<Requested_Periodic_TAU>s),(list
of supported <Requested_Active_
Time>s)
OK
+CPSMS: (0,1,2),,,("00000000"-
"11111111"),("00000000"-"11111111")
OK
14.7.3Defined values
Parameter Type Description
<mode> Number Indication to disable or enable the use of PSM in the UE. Allowed values:
• 0 (default and factory-programmed value): disable the use of PSM
• 1: enable the use of PSM
• 2: disable the use of PSM and reset all parameters for PSM to factory-programmed
values.
<Requested_
Periodic_RAU>
String Requested extended periodic RAU (T3312) value to be allocated to the GERAN/
UTRAN, one byte in an 8 bit format. For the coding and the value range, see the GPRS
Timer 3 IE in 3GPP TS 24.008 [12]
<Requested_GPRS_
READY_timer>
String Requested GPRS READY timer (T3314) value to be allocated to the UE in GERAN/
UTRAN, one byte in an 8 bit format. For the coding and the value range, see the GPRS
Timer 3 IE in 3GPP TS 24.008 [12]
<Requested_
Periodic_TAU>
String One byte in an 8 bit format. Requested extended periodic TAU value (T3412) to be
allocated to the device in E-UTRAN. The requested extended periodic TAU value is
coded as one byte (octet 3) of the GPRS Timer 3 information element coded as bit
format (e.g. "01000111" equals 70 hours). For the coding and the value range, see the