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Technology
LTE - cat 1

This document describes the LE910Cx Interface Board which is part of the complete LE910Cx Development Kit (Dev-Kit).

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This document describes the integration steps of the cellular modules USB endpoints in Linux systems.

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Uploaded at
2017-08-04 11:15:36
Last updated
2021-07-12 12:14:57
Version
R10
Related products
Telit LE910C4-LA LTE CAT-4 mPCIe w/ Simholder
Telit ME910C1-NV LTE CAT-M1 Verizon LGA
Telit ME910C1-NV GNSS LTE CAT-M1 Verizon LGA
Telit ME910G1-WW CAT-M1/NB-IoT S.SKU LGA
Telit ME910C1-WW S.SKU A (opt.GNSS), LGA
Telit FN980 5G M.2 sub-6
Telit LE910C1-LA LTE CAT-1 mPCIe
Telit ME910G1-W1 CAT-M1/NB-IoT LGA
Telit LE910C4-EU LTE CAT-4 LGA
Telit ME910C1-WW mPCIe SIM-Holder
Telit LE910C4-AP LTE CAT-4 LGA
Telit ME910C1-E2
Telit ME910C1-K1
Telit ME910C1-J1 Cat-M1/NB1 LGA
Telit ME910C1-NV LTE Cat-M1/NB1 mPCIe
Telit ME910C1-NA LTE Cat-M1/NB1 mPCIe
Telit LE910C4-CN LTE CAT-4 mPCIe
Telit LE910C1-SA CAT-1 LGA
Telit LE910C1-NF S.SKU LTE CAT-1 mPCIe SIM
Telit LE910C1-EU LTE CAT-1 mPCIe SIM
Telit LE910C4-EU LTE CAT-4 mPCIe SIM
Telit LE910-SV V2 (Reel)
Telit LE910B1-NA S.SKU LTE Cat-1 LGA
Telit LE910-NA V2 LTE CAT-4, S.SKU LGA
Telit LE910-SVL LTE CAT-1
Telit HE910-GL HSPA+ LGA
Telit LE910C1-NA Interface Board
Telit HE910-NAD HSPA+ LGA
Telit LE910-SVG LTE CAT-3 LGA
Telit HE910-NAR HSPA LGA
Telit HE910-D HSPA+ LGA
Telit LE910-NAG LTE CAT-3 AT&T LGA
Telit LE910-SVG LTE CAT-3 mPCIe
Telit LE910-NVG LTE CAT-3 LGA
Telit FN980m 5G M.2
Telit LM960 Interface Board
Telit LE910C1-AP LTE CAT-1 mPCIe SIM
Telit LE910C1-NF LTE CAT-1 mPCIe
Telit LE910C4-AP LTE CAT-4 mPCIe SIM
Telit LE910-NA1 S.SKU LTE Cat-1 LGA
Telit LE910-JN1 LTE Cat-1 LGA
Telit LE910B1-NA
Telit LE910B1-SA
Telit LE910-AU V2
Telit LE910-SV V2
Telit LE910B4-NA
Telit LE910-SV1 LTE Cat-1 mPCIe
Telit LE910-EU1 LTE Cat-1 mPCIe
Telit LE910-JN1 LTE Cat-1 mPCIe
Telit LE910-NA1 LTE Cat-1 mPCIe
Telit LE910C1-AP Interface Board
Telit LE910C1-EU Interface Board
Telit LE910-NA V2 Interface Board
Telit LE910C4-NF Interface Board
Telit LM960A18 LTE CAT-18 mPCIe
Telit LM940A11, HW Rev. 2, LTE CAT-11, GPS, mPCIe
Telit LM960 LTE CAT-18, GPS, mPCIe
Telit ME910C1-E1 Interface Board
Telit ME910C1-AU Interface Board
Telit ME910C1-NA Interface board
Telit LE910-EU1 Interface board
Telit LE910-NA1 Interface board
Telit LE910-SV1 Interface board
Telit LE910-NA V2 LTE CAT-4, S.SKU, mPCIe
Telit HE910-G HSPA+, GPS, mPCIe
Telit HE910-G-SIM HSPA+, GPS, miniPCIe, SIM card holder
Telit HE910-D HSPA+, miniPCIe, Global
Telit HE910-D-SIM HSPA+, miniPCIe, SIM card holder
Telit LM940A11 LTE CAT-11, GPS, mPCIe
Telit LE910-EU V2 LTE CAT-4, mPCIe
Telit LE910-SV V2 LTE CAT-4, Verizon, mPCIe
Telit LE910-NA V2 LTE CAT-4, AT T, TM, mPCIe
Telit LE910-AU V2 LTE CAT-4, Telstra, mPCIe
Telit HE910-GL SIM UMTS, miniPCIe, SIM card holder
Telit HE910-G (Voice) HSPA+ LGA
Telit HE910-DG HSPA+ LGA
Telit HE910-EUD HSPA LGA
Telit UE910-EUR HSPA LGA
Telit UE910-NAR HSPA LGA
Telit LE910-NA1 LTE CAT-1 LGA
Telit LE910-EU1 LTE CAT-1 LGA
Telit LE910-SV1 LTE CAT-1 LGA
Telit LE910-EU V2 LTE CAT-4 LGA
Telit LE910-NA V2 LTE CAT-4 LGA
Telit LE910D1-E1 LTE CAT-1 LGA
Telit ME910C1-NA S.SKU LTE CAT-M1 LGA
Telit ME910C1-NA S.SKU GNSS LTE CAT-M1 LGA
Telit ME910C1-E1 LTE CAT-M1/NB1 LGA
Telit ME910C1-E1 GNSS LTE CAT-M1/NB1 LGA
Telit ME910C1-AU LTE CAT-M1/NB1 LGA
Telit ME910C1-AU GNSS LTE CAT-M1/NB1 LGA
Telit LE910C1-EU LTE CAT-1 mPCIe
Telit LE910C1-AP LTE CAT-1 mPCIe
Telit LE910C4-NF
Telit LE910C1-EU LTE CAT-1 LGA
Telit LE910C1-AP
Telit LE910C4-NF LTE CAT-4 mPCIe SIM
Telit LE910C1-NF Interface board
Telit LE910C1-NF S.SKU LTE CAT-1 LGA
Telit LE910C4-EU LTE CAT-4 mPCIe
Telit LE910C1-NS LTE CAT-1 Sprint LGA
Telit LE910C1-NA LTE CAT-1 AT&T LGA
Telit LE910C1-NS LTE CAT-1 Sprint mPCIe
Telit LE910C4-NF LTE CAT-4 mPCIe
Telit LE910C4-LA LTE CAT-4 mPCIe

This document provide guidelines for Telit customers about system certification process and how to reduce the effort to reach the North American market.

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Uploaded at
2021-05-11 14:04:46
Last updated
2021-05-11 14:04:46
Version
R3
Related products
Telit LE910C4-LA LTE CAT-4 mPCIe w/ Simholder
Telit FN980m 5G M.2
Telit FN980 5G M.2 sub-6
Telit LE910C1-SVX LTE Cat-1 LGA
Telit LE910C1-SAX LTE Cat-1 LGA
Telit LM960A9-P mPCIe
Telit UE866-EU UMTS LGA
Telit LM940A11, HW Rev. 2, LTE CAT-11, GPS, mPCIe
Telit ME910C1-WW Interface Board
Telit ME910C1-NA S.SKU Interface Board
Telit LE910C4-NF Interface Board
Telit LE910-NA V2 Interface Board
Telit LE910C1-EU Interface Board
Telit LE910C1-AP Interface Board
Telit ME910C1-NA LTE Cat-M1/NB1 mPCIe
Telit ME910C1-NV LTE Cat-M1/NB1 mPCIe
Telit LE910C1-EU LTE CAT-1 mPCIe
Telit LE910C1-AP LTE CAT-1 mPCIe
Telit LE910-NA1 LTE Cat-1 mPCIe
Telit LE910-JN1 LTE Cat-1 mPCIe
Telit LE910-EU1 LTE Cat-1 mPCIe
Telit LE910-SV1 LTE Cat-1 mPCIe
Telit NE910C1-E1 GNSS
Telit ME910C1-J1 Cat-M1/NB1 LGA
Telit ME910C1-K1
Telit ME910C1-E2
Telit LE910C4-NF
Telit LE910B4-NA
Telit LE910-SV V2 (Reel)
Telit LE910-SV V2
Telit LE910-AU V2
Telit LE910B1-SA
Telit LE910B1-NA
Telit LE910C1-EU LTE CAT-1 LGA
Telit LE910C1-AP
Telit LE910-JN1 LTE Cat-1 LGA
Telit LE910-NA1 S.SKU LTE Cat-1 LGA
Telit LE910C1-EUX LTE Cat-1 LGA
Telit LE910C1-EUX Interface board
Telit LE910C4-AP LTE CAT-4 LGA
Telit LE910C4-LA LTE CAT-4 mPCIe
Telit LE915A6-P interface board
Telit LE915A4-P interface board
Telit LE915A6-P Cat-6 LGA
Telit LE915A4-P Cat-4 LGA
Telit ME910C1-WW mPCIe SIM-Holder
Telit LE910C1-EUX LTE CAT-1 mPCIe
Telit LE910C4-EU LTE CAT-4 LGA
Telit ME910G1-W1 CAT-M1/NB-IoT LGA
Telit LE910C1-LA LTE CAT-1 mPCIe
Telit ME310G1-W1 CAT-M1/NB-IoT S.SKU LGA
Telit LE910C1-NF S.SKU LTE CAT-1 mPCIe SIM
Telit LE910C1-SA CAT-1 LGA
Telit ME910C1-WW S.SKU A (opt.GNSS), LGA
Telit NE310H2-W1, LTE NB2, LGA
Telit LE910C4-CN LTE CAT-4 mPCIe
Telit LE910C4-AP LTE CAT-4 mPCIe SIM
Telit LE910C1-NF LTE CAT-1 mPCIe
Telit LE910C1-AP LTE CAT-1 mPCIe SIM
Telit LE910C1-EU LTE CAT-1 mPCIe SIM
Telit LM960A18 LTE CAT-18 mPCIe
Telit LE910C4-NF LTE CAT-4 mPCIe SIM
Telit ME910G1-WW Interface Board
Telit ME310G1-WW Interface board
Telit LE910C1-NF Interface board
Telit ME910G1-WW CAT-M1/NB-IoT S.SKU LGA
Telit ME310G1-WW CAT-M1/NB-IoT S.SKU LGA
Telit LE910C1-NF S.SKU LTE CAT-1 LGA
Telit LE910C4-EU LTE CAT-4 mPCIe SIM
Telit LE910C4-EU LTE CAT-4 mPCIe
Telit LE910-NVG LTE CAT-3 LGA
Telit LE910-SVG LTE CAT-3 mPCIe
Telit LE910-NAG LTE CAT-3 AT&T LGA
Telit LE910C1-NS LTE CAT-1 Sprint LGA
Telit LE910C1-NA LTE CAT-1 AT&T LGA
Telit LN932 LTE CAT-6 M.2
Telit HE910-D HSPA+ LGA
Telit HE910-NAR HSPA LGA
Telit LE910-SVG LTE CAT-3 LGA
Telit HE910-NAD HSPA+ LGA
Telit LE910C1-NA Interface Board
Telit ME910C1-NV GNSS LTE CAT-M1 Verizon LGA
Telit ME910C1-NV LTE CAT-M1 Verizon LGA
Telit HE910-GL HSPA+ LGA
Telit LE910-SVL LTE CAT-1
Telit LE910C1-NS LTE CAT-1 Sprint mPCIe
Telit LE910B1-NA S.SKU LTE Cat-1 LGA
Telit LE910-NA V2 LTE CAT-4, S.SKU LGA
Telit LE910C4-NF LTE CAT-4 mPCIe
Telit LE922A6-E2 LTE CAT-6 LGA
Telit LN941 LTE CAT-6, M.2
Telit LM960 LTE CAT-18, GPS, mPCIe
Telit LE910-NA V2 LTE CAT-4, S.SKU, mPCIe
Telit LE910-SV1 Interface board
Telit LE910-NA1 Interface board
Telit LE910-EU1 Interface board
Telit ME910C1-NA Interface board
Telit ME910C1-AU Interface Board
Telit ME910C1-E1 Interface Board
Telit LN940 A9 LTE CAT-9 M.2
Telit LN940 A11 LTE CAT-11 M.2
Telit ME910C1-AU GNSS LTE CAT-M1/NB1 LGA
Telit ME910C1-AU LTE CAT-M1/NB1 LGA
Telit ME910C1-E1 GNSS LTE CAT-M1/NB1 LGA
Telit ME910C1-E1 LTE CAT-M1/NB1 LGA
Telit ME910C1-NA S.SKU GNSS LTE CAT-M1 LGA
Telit ME910C1-NA S.SKU LTE CAT-M1 LGA
Telit LE910D1-E1 LTE CAT-1 LGA
Telit LE910-NA V2 LTE CAT-4 LGA
Telit LE910-EU V2 LTE CAT-4 LGA
Telit LE910-SV1 LTE CAT-1 LGA
Telit LE910-EU1 LTE CAT-1 LGA
Telit LE910-NA1 LTE CAT-1 LGA
Telit HE910-EUD HSPA LGA
Telit HE910-DG HSPA+ LGA
Telit HE910-G (Voice) HSPA+ LGA
Telit HE910-GL SIM UMTS, miniPCIe, SIM card holder
Telit LE910-AU V2 LTE CAT-4, Telstra, mPCIe
Telit LE910-NA V2 LTE CAT-4, AT T, TM, mPCIe
Telit LE910-SV V2 LTE CAT-4, Verizon, mPCIe
Telit LE910-EU V2 LTE CAT-4, mPCIe
Telit LM940A11 LTE CAT-11, GPS, mPCIe
Telit HE910-D-SIM HSPA+, miniPCIe, SIM card holder
Telit HE910-D HSPA+, miniPCIe, Global
Telit HE910-G-SIM HSPA+, GPS, miniPCIe, SIM card holder
Telit HE910-G HSPA+, GPS, mPCIe

This archive contains the Telit LE910C1-EU TFI firmware updater tool and related release notes.

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Uploaded at
2021-07-12 15:36:11
Last updated
2021-07-12 15:36:11
Version
V.25.21.220_CUST_118_pref
Requirements
Telit Windows drivers installed.
Related products
Telit LE910C1-EU Interface Board
Telit LE910C1-EU LTE CAT-1 mPCIe
Telit LE910C1-EU LTE CAT-1 LGA
Telit LE910C1-EU LTE CAT-1 mPCIe SIM
Question

How to collect initial diagnostics data and logs for Telit cellular modules needed when requesting Techship technical support?

Solution

In order to ease the troubleshooting of technical problems and understand your end-product or application and its usage scenario we ask you to please provide the following information when creating a technical support ticket at: techship.com/technical_support/

Please give a detailed problem description and in what precise circumstances it is present.

Describe the host system:
-Hardware (system board, processor architecture, other peripheral devices...)
-Operating system with detailed versions (E.g. Windows version and build, Linux distribution, kernel version)
-Drivers used and versions (Linux: out-of-tree vendor drivers or in-kernel drivers?)

Details from the cellular module label:
-Model
-SKU/BOM or P/N code
IMEI number

For Linux systems, capture terminal logs from commands:
uname -a
lsusb
lsusb -t
ifconfig -a
ls -l /dev/serial/by-id
ls -l /sys/bus/usb-serial/devices
dmesg

The cellular module logs can be acquired by accessing one of the USB enumerated serial (COM) interfaces or physical UART serial interfaces accepting AT commands. In Windows device manager they are generally found as modem infterface or serial and ports interface types).

Send AT commands to module and capture the text output:
Test that you get a OK reply:
AT
Enable AT command echo:
ATE1
Verbose error reporting:
AT+CMEE=2
Module model:
AT+CGMM
Firmware version:
AT+CGMR
IMEI Code:
AT+CGSN
USB endpoint configuration:
AT#USBCFG?
Serial port configuration:
AT#PORTCFG?
Operational mode:
AT+CFUN?
Selected network access techniques:
AT+WS46?
List network operator info:
AT+COPS?
Network registration status:
AT+CREG?
AT+CGREG?
AT+CEREG?
Signal strength:
AT+CSQ
Last serving cell network information:
AT#SERVINFO
Current network status:
AT#RFSTS
List APN details:
AT+CGDCONT?
List Packet switch enable/disable status:
AT+CGATT?
List PDP profiles status:
AT+CGACT?
List default data connection details:
AT#BND?
List bearers and IP addresses:
AT+CGCONTRDP=
AT+CGPADDR=
AT#FWSWITCH?
AT#SWPKGV
AT#GAUTH?
AT#CGPADDR=
AT#AUTOBND?
AT#AUTOATT?

Additional test commands for Telit LM940/LM960:
AT#FIRMWARE
AT#FIRMWARE?
AT#GETFW
AT#ACTIVEFW?
AT#CACTL?
AT#RXDIV?
AT#RXTOGGLE?
AT#LRXDIV?
AT#LCFC
AT#TEMPSENS?
AT#GPIO?
AT#HWREV
AT#QSS?
AT#USB3TUNE?
AT#USBSWITCH?

Images
Telit logo
Related products
Telit HE910-G HSPA+, GPS, mPCIe
Telit HE910-G-SIM HSPA+, GPS, miniPCIe, SIM card holder
Telit HE910-D HSPA+, miniPCIe, Global
Telit HE910-D-SIM HSPA+, miniPCIe, SIM card holder
Telit LM940A11 LTE CAT-11, GPS, mPCIe
Telit LE910-EU V2 LTE CAT-4, mPCIe
Telit LE910-SV V2 LTE CAT-4, Verizon, mPCIe
Telit LE910-NA V2 LTE CAT-4, AT T, TM, mPCIe
Telit LE910-AU V2 LTE CAT-4, Telstra, mPCIe
Telit HE910-GL SIM UMTS, miniPCIe, SIM card holder
Telit HE910-G (Voice) HSPA+ LGA
Telit HE910-DG HSPA+ LGA
Telit HE910-EUD HSPA LGA
Telit UE910-EUR HSPA LGA
Telit UE910-NAR HSPA LGA
Telit LE910-NA1 LTE CAT-1 LGA
Telit LE910-EU1 LTE CAT-1 LGA
Telit LE910-SV1 LTE CAT-1 LGA
Telit LE910-EU V2 LTE CAT-4 LGA
Telit LE910-NA V2 LTE CAT-4 LGA
Telit LE910D1-E1 LTE CAT-1 LGA
Telit ME910C1-NA S.SKU LTE CAT-M1 LGA
Telit ME910C1-NA S.SKU GNSS LTE CAT-M1 LGA
Telit ME910C1-E1 LTE CAT-M1/NB1 LGA
Telit ME910C1-E1 GNSS LTE CAT-M1/NB1 LGA
Telit ME910C1-AU LTE CAT-M1/NB1 LGA
Telit ME910C1-AU GNSS LTE CAT-M1/NB1 LGA
Telit LN940 A11 LTE CAT-11 M.2
Telit LN940 A9 LTE CAT-9 M.2
Telit ME910C1-E1 Interface Board
Telit ME910C1-AU Interface Board
Telit ME910C1-NA Interface board
Telit LE910-EU1 Interface board
Telit LE910-NA1 Interface board
Telit LE910-SV1 Interface board
Telit LE910-NA V2 LTE CAT-4, S.SKU, mPCIe
Telit LM960 LTE CAT-18, GPS, mPCIe
Telit LN941 LTE CAT-6, M.2
Telit LE910C4-NF LTE CAT-4 mPCIe
Telit LE910-NA V2 LTE CAT-4, S.SKU LGA
Telit LE910B1-NA S.SKU LTE Cat-1 LGA
Telit LE910C1-NS LTE CAT-1 Sprint mPCIe
Telit LE910-SVL LTE CAT-1
Telit HE910-GL HSPA+ LGA
Telit ME910C1-NV LTE CAT-M1 Verizon LGA
Telit ME910C1-NV GNSS LTE CAT-M1 Verizon LGA
Telit LE910C1-NA Interface Board
Telit HE910-NAD HSPA+ LGA
Telit UE910-NAD AT&T 3G LGA
Telit LE910-SVG LTE CAT-3 LGA
Telit HE910-NAR HSPA LGA
Telit HE910-D HSPA+ LGA
Telit LE910C1-NA LTE CAT-1 AT&T LGA
Telit LE910C1-NS LTE CAT-1 Sprint LGA
Telit LE910-NAG LTE CAT-3 AT&T LGA
Telit LE910-SVG LTE CAT-3 mPCIe
Telit UE910-EUD HSPA LGA
Telit UE910-N3G HSPA AT&T LGA
Telit LE910-NVG LTE CAT-3 LGA
Telit LE910-NA1 S.SKU LTE Cat-1 LGA
Telit LE910-JN1 LTE Cat-1 LGA
Telit LE910C1-AP
Telit LE910C1-EU LTE CAT-1 LGA
Telit LE910B1-NA
Telit LE910B1-SA
Telit LE910-AU V2
Telit LE910-SV V2
Telit LE910B4-NA
Telit LE910C4-NF
Telit ME910C1-E2
Telit ME910C1-K1
Telit ME910C1-J1 Cat-M1/NB1 LGA
Telit LE910-SV1 LTE Cat-1 mPCIe
Telit LE910-EU1 LTE Cat-1 mPCIe
Telit LE910-JN1 LTE Cat-1 mPCIe
Telit LE910-NA1 LTE Cat-1 mPCIe
Telit LE910C1-AP LTE CAT-1 mPCIe
Telit LE910C1-EU LTE CAT-1 mPCIe
Telit ME910C1-NV LTE Cat-M1/NB1 mPCIe
Telit ME910C1-NA LTE Cat-M1/NB1 mPCIe
Telit LE910C1-AP Interface Board
Telit LE910C1-EU Interface Board
Telit LE910-NA V2 Interface Board
Telit LE910C4-NF Interface Board
Telit ME910C1-NA S.SKU Interface Board
Telit ME910C1-WW Interface Board
Telit LE910-SV V2 (Reel)
Telit LE910C4-EU LTE CAT-4 mPCIe
Telit LE910C4-EU LTE CAT-4 mPCIe SIM
Telit LE910C1-NF S.SKU LTE CAT-1 LGA
Telit LM960 Interface Board
Telit ME310G1-WW CAT-M1/NB-IoT S.SKU LGA
Telit ME910G1-WW CAT-M1/NB-IoT S.SKU LGA
Telit LE910C1-NF Interface board
Telit ME310G1-WW Interface board
Telit ME910G1-WW Interface Board
Telit LM940A11, HW Rev. 2, LTE CAT-11, GPS, mPCIe
Telit LE910C4-NF LTE CAT-4 mPCIe SIM
Telit LM960A18 LTE CAT-18 mPCIe
Telit LE910C1-EU LTE CAT-1 mPCIe SIM
Telit LE910C1-AP LTE CAT-1 mPCIe SIM
Telit LE910C1-NF LTE CAT-1 mPCIe
Telit LE910C4-AP LTE CAT-4 mPCIe SIM
Telit LE910C4-CN LTE CAT-4 mPCIe
Question

How do I select specific bands on my Telit module?

Solution

The AT command AT#BND can be used to select what specific GSM, UMTS and LTE bands that you want to be active on your module.

If you are experiencing poor DL or UL speeds, one solutions may be to only select the bands that you know are available, which can increase the transfer speeds.


When entering AT#BND? it will return a reply looking like (for example):
AT#BND?
#BND: 0,18,A7E0BB0F38DF,42 (for Generic)
OK

(Please note that the following examples are when using a LM960A18)

The "0" is referring to GSM bands, "18" to UMTS bands, "A7E0BB0F38DF" to LTE bands and "42" to LTE extended bands.

Starting at the GSM band (at chapter "Select Band - #BND" in the AT command reference manual) we can see that 0 corresponds to "GSM 900MHz + DCS 1800MHz (default value depending on module)"

In the same chapter we can read that 18 corresponds to 2100MHz (FDD I) + 1900MHz (FDD II) + 1700MHz (FDD IV) +
850MHz (FDD V) + 900MHz (FDD VIII) + JAPAN1800(FDD IX) + JAPAN800(FDD XIX) (default value depending on product)"

Now for LTE, which is probably what is a little tricky to understand. If we start the Windows Calculator and change to Programmer mode. If you copy the "A7E0BB0F38DF" into the calculator window it should convert it to binary.
HEX: A7E0 BB0F 38DF
BIN: 1010 0111 1110 0000 1011 1011 0000 1111 0011 1000 1101 1111

If you look at the line of BIN above you can see what band are active (1) and which are not (0). Looking from right to left, the first bit corresponds to B1, second bit to B2, third bit B3, and so on…

HEX: A7E0 BB0F 38DF
BIN: 1010 0111 1110 0000 1011 1011 0000 1111 0011 1000 1101 1111
Selected bands: B1+B2+B3+B4+B5+B7+B8+B12+B13+B14+B17+B18+B19+B20+B25+B26+B28+B29+B30+B32+B38+B39+B40+B41+B42+B43+B46+B48

So if I, for example, only want the GSM bands "GSM 900MHz + DCS 1800MHz", the UMTS band "1900MHz (FDD II)" and LTE bands "B1, B4, B7, B28" I would enter the following:

AT#BND=0,1,8000049

Since the first "0" corresponds to "GSM 900MHz + DCS 1800MHz", the "1" corresponds to "1900MHz (FDD II)" and lastly "8000049" corresponds to B1, B4, B7 and B28 as shown below:

Bands: B1, B4, B7, B28
Binary: 1000 0000 0000 0000 0000 0100 1001
Hexadecimal: 800 0049


For further information please take a look at the AT command user guide available on the product's specific page under "technical documentation", which is available for download once logged in.

Question

What Linux kernel modules and configs are commonly used for communicating with cellular modules over their USB interface?

Solution

Most cellular modules can be supported in Linux by using som of the in-kernel drivers. The physical data interface to the host Linux system is usually done over USB which enumerates a set of different endpoints/interfaces. A set of serial interfaces for Modem/PPP, AT commands, NMEA location data and chipset debug information are almost always available in all configurations.

In addition some type of network endpoint/interface are also available and exposed. This can vary between manufacturers and chipset vendors and can also commonly be configurable by using USB configuration mode switching or through vendor specific AT commands.

Recommended kernel configurations to enable are listed bellow. Many cellular modules base their Linux support on these modules and drivers. Once included in the kernel build, the USB interfaces will be detected and bound correctly out-of-the-box or after applying source code patches to the driver modules.

Configs for USB serial drivers:
CONFIG_USB_SERIAL
CONFIG_USB_SERIAL_GENERIC
CONFIG_USB_SERIAL_WWAN
CONFIG_USB_SERIAL_OPTION
CONFIG_USB_SERIAL_QUALCOMM
CONFIG_USB_ACM

Configs for Modem/PPP support:
CONFIG_PPP
CONFIG_PPP_BSDCOMP
CONFIG_PPP_DEFLATE
CONFIG_PPP_FILTER
CONFIG_PPP_MPPE
CONFIG_PPP_MULTILINK
CONFIG_PPPOE
CONFIG_PPP_ASYNC
CONFIG_PPP_SYNC_TTY

Configs for USB network drivers:
CONFIG_USB_USBNET
CONFIG_USB_NET_QMI_WWAN
CONFIG_USB_NET_CDCETHER
CONFIG_USB_NET_RNDIS_HOST
CONFIG_USB_NET_CDC_NCM
CONFIG_USB_NET_HUAWEI_CDC_NCM
CONFIG_USB_NET_CDC_MBIM

Please relate to the Techship product specific web pages for vendor specific Linux integration guides.

Below is a selection of kernel commits relating to cellular module support in Linux kernels:
qmi_wwan: Add support for Fibocom NL678 series
qmi_wwan: Added support for Telit LN940 series
qmi_wwan: Added support for Fibocom NL668 series
USB: serial: option: add support for GosunCn ME3630 RNDIS mode
USB: serial: option: add support for Simcom SIM7500/SIM7600 RNDIS mode
USB: serial: option: add Simcom SIM7500/SIM7600 (MBIM mode)
USB: serial: option: add Fibocom NL678 series
USB: serial: option: add Telit LN940 series
USB: serial: option: add Fibocom NL668 series
USB: serial: option: add GosunCn ZTE WeLink ME3630
qmi_wwan: apply SET_DTR quirk to the SIMCOM shared device ID

If you use any of the listed cellular modules, drivers and specified USB modes in the commits above, ensure that your kernel version already include the patch or apply it to your build.

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