FMM130 Network settings

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Network settings

Network Settings


A device with external Quectel BG96 modem is named FMMxxx.
Quectel BG96 has different connection sequence from firmware side compared to other modems.


Network settings method is called on these occasions:
1. The modem is initialized.
2. The configuration has changed.
3. Periodically every 60 seconds after startup.


On each network, settings call changes are checked. The firmware sends configuration commands when they change. The on-device startup, all these commands are always sent as we don’t know whether they have changed.

FMM1XY Network Settings.png

LTE bands


Quectel BG96 modem has 14 LTE network bands. According to Quectel, each band can take up to 5 minutes to scan. To improve scan speed geographic bands have been implemented.

Geographic bands are functionality that sets (changes) configuration bands according to the device’s GPS location. Functionality is only active when band selection mode is “Auto”. It is run from network settings method (see above).

Bands by location
Location Abrevation Bands set
the United States of America US B2 B4 B12 B13
Europe EU B3 B8 B20
Korea KR B3 B5
Australia AU B3 B28
The Middle East ET B3 B8 B28
Japan JP B1 B8 B18 B19
China CH B1 B3 B5 B8 B26 B39

FMM1XY LTE Bands.png

Operator connection


Device saves to memory last seen operator and its’ network type. When there is no operator attached, the device tries to attach to last seen operator on 4G IoT network mode. If the connection fails, device clears last seen operator from memory and starts new operator search. Same sequence happens when preferred operator is given (configured), but instead of clearing operator, device each time connecting first tries to connect to preferred operator.