Eurotech ReliaGATE 10-14 Series, User Manual

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ReliaGATE 10-14 User manual Rev. 0-10 12 How to use the interfaces in Linux
12.7 How to use the Internal Cellular Modem
The ReliaGATE 10-14 supports the Telit LE910C1family of LTE cellular modems:
Product version Modem variant Technology
-35 Telit LE910C1-NF - North America LTE Cat 1 3G Fallback
-36 Telit LE910C1-EU - Europe LTE Cat 1 2G/3G Fallback
-37 Telit LE910C1-AP - Japan LTE Cat 1 3G Fallback
The modem initialization is handled by a systemd service
setup-modem
.
Before using the modem:
1. Select the MiniSIM card holder to use
2. Refer to the Telit LE910Cx AT command reference guide for a full list of modem AT
commands and example usage.
12.7.1 How to select the MiniSIM card holder to use
To confirm SIM card is present, enter the following command:
telit-he910 is_sim_present
The expected answer is:
SIM found
To select the top card holder (the default value), enter the following command:
telit-he910 chat AT#SIMSELECT=1
To select the bottom card holder, enter the following commands:
telit-he910 chat AT#ENSIM2=1
telit-he910 chat AT#SIMSELECT=2
The value of the active SIM card is stored in a non-volatile memory, therefore the same SIM card remains
active even after a power cycle of the system.
12.7.2 Note for LE910C1-NF1 Modem: AT&T / Verizon firmware support
The LE910C1-NF1 modem supports both AT&T and Verizon firmware.
The firmware used by the modem needs to be set the first time the modem is used. Once the modem
firmware has been set, the same firmware will load on each modem reset.
A firmware switch between the two modem firmware versions can be performed during operation.
With dual SIM usage on the ReliaGATE 10-14 it is possible to load both an AT&T and a Verizon SIM into
the card holders, and then switch between Verizon and AT&T firmware and their respective SIM cards to
provided coverage on either network. Due to the firmware switch, simultaneous operation is not possible.
AT&T / Verizon firmware selection is performed using an AT command. This loads the respective AT&T /
Verizon firmware, resets the modem, and then re-enumerates the device on the bus.
NOTE: Allow 20 seconds from the execution of the command before sending further AT commands to
allow the device to be re-enumerates on the USB bus.
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