Gemalto Cinterion ELS31T-J, Hardware Interface Description, Page: 42 / 102

Cinterion
®
LTE Terminals Hardware Interface Description
3.9 Power Up/Power Down Scenarios
47
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ELSxT_HID_v04 2018-09-04
Confidential / Preliminary
Page 42 of 102
nal connection between IGT_IN pin and PLUS pin.LTE Terminals don’t support the IGT_IN
function. Note that if employing PoE for LTE Terminals, the module will restart automatically
after a normal shutdown. The module will also restart if Alway On is configured (see
Section
8.3.1.8 ).
3.9 Power Up/Power Down Scenarios
In general, be sure not to turn on the LTE Terminals while it is beyond the safety limits of volt-
age and temperature stated in
Section 4.1 . LTE Terminals immediately switch off after having
started and detected these inappropriate conditions. In extreme cases this can cause perma-
nent damage to the LTE Terminals.
3.9.1 Turn LTE Terminals on
There are various possibilities to turn on LTE Terminals and start into normal mode, depending
on connecting and/or operating states.
If powered off (i.e., if LTE Terminals‘ power supply is disconnected):
•
LTE Terminals can simply be started up by plugging an appropriate power supply unit
between PLUS and GND of the 6-pole Western jack. If using the PoE feature, LTE Terminal
can also be started up by connecting simply the Ethernet interface
If switched off (i.e., while in Power Down mode):
•
LTE Terminals can be started up by activating the RS-232 DTR line (as long as RST_IN
signal (pin 3) is not active (voltage <2V)
• LTE Terminals can be started up by configuring the watchdog appropriately. For details see
Chapter 8 .
Note: If employing PoE (see Section 3.8 ), LTE Terminals will automatically restart into normal
mode after switch off (see Section 3.9.3 ). The module will also restart if Alway On is configured
(see Section 8.3.1.8 )
3.9.2 Reset/Restart LTE Terminals
There are various possibilities to reset/restart LTE Terminals:
•
LTE Terminals can be reset/restarted by entering the command AT+CFUN=x,1. For details
on AT+CFUN please see
[1] .
• LTE Terminals can be reset/restarted by configuring the watchdog appropriately. For
details see
Chapter 8 .
• LTE Terminals can be reset/restarted by configuring a wake-up alarm (see Section 3.12 )
before using AT^SMSO to turn them off and send them into Power Down mode.
• LTE Terminals can be reset/restarted by simply shutting them down as described in Section
3.9.3 and then restarting them as described in Section 3.9.1 . Note: If employing PoE (see
Section 3.8 ), it is ensured that the module will automatically restart after a normal shutdown
using AT^SMSO. The module will also restart if Alway On is configured (see Section
8.3.1.8 )