User Manual

TANGO55/I & TANGO56/I VERSION 1.03
^SHUTDOWN
After sending AT^SMSO do not enter any other AT commands. There are two ways to
verify when the modems turn off:
 Wait for the URC “SHUTDOWN”. It indicates that data have been stored
non-volatile and the modems turn off in less than 1 second.
Be sure not to disconnect the operating voltage V
Vin+
before the URC “SHUTDOWN”
has been issued. Otherwise you run the risk of losing data.
While the GSM engine is in POWER DOWN mode the application interface is
switched off and must not be fed from any other source.
4.2.6 Maximum number of turn-on/turn-off cycles
Each time the modems are shut down, data will be written from volatile memory to
flash memory. The guaranteed maximum number of write cycles is limited to 100.000.
4.2.7 Automatic GPRS Multislot Class change
Temperature control is also effective for operation in GPRS Multislot class 10. If the
board temperature increases to the limit specified for restricted operation (see 2.3
for temperature limits known as restricted operating) while data are transmitted over
GPRS, the module automatically reverts from GPRS Multislot TANGO55/56 /I56i returns
to the higher Multislot class. If the temperature stays at the critical level or even
continues to rise, TANGO55/56 will not switch back to the higher class. After a
transition from Multislot class 10 to Multislot class 8 a possible switchback to Multislot
class 10 is blocked for one minute. Please note that there is not one single cause of
switching over to a lower GPRS Multislot class. Rather it is the result of an interaction
of several factors, such as the board temperature that depends largely on the
ambient temperature, the operating mode and the transmit power. Furthermore,
take into account that there is a delay until the network proceeds to a lower or,
accordingly, higher Multislot class. The delay time is network dependent. In extreme
cases, if it takes too much time for the network and the temperature cannot drop
due to this delay, the module may even switch off. For GPRS connection see related
document [2].
This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission.
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