This document is a cheat sheet for configuring 3G/4G USB modems provided by Sakura Internet, detailing installation commands and configuration steps. It includes instructions for using usb_modeswitch to switch the modem from storage to modem mode and setting up wvdial for internet connection. Essential commands and configuration options are summarized for quick reference.

1. 3/4G USB modem Cheat Sheet
6th May, 2020 SAKURA Internet, Inc. Research Center SR / Naoto MATSUMOTO
(C) Copyright 1996-2020 SAKURA Internet Inc

2. 3/4G USB modem Cheat Sheet
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# apt install -y usb-modeswitch eject lshw usbutils wvdial cu
# echo blacklist cdc_acm >/etc/modprobe.d/cdc_acm-blacklist.conf
# sync; sync; sync; reboot
# eject sr0
or
L-02A# usb_modeswitch --std-eject ...-vendor 0x1004 ...-product 0x610c --target-vendor 0x1004 --target-product 0x6109
L-05A# usb_modeswitch --std-eject ...-vendor 0x1004 ...-product 0x613a --target-vendor 0x1004 --target-product 0x6124
L-03F# usb_modeswitch --std-eject ...-vendor 0x1004 ...-product 0x6367 --target-vendor 0x1004 --target-product 0x6366
and
# modprobe option
# modprobe usbserial
L-02A# echo '1004 6109' > /sys/bus/usb-serial/drivers/option1/new_id
L-05A# echo '1004 6124' > /sys/bus/usb-serial/drivers/option1/new_id
L-03F# echo '1004 6366' > /sys/bus/usb-serial/drivers/option1/new_id
# vi /etc/wvdial.conf
[Dialer Defaults]
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2
Init4 = AT+CGDCONT=1,"IP","XXXX.XX"
:
APN = XXXX.XX
Modem = /dev/ttyUSB1
:
Username = XXXXX
Password = XXXXX
Carrier Check = no
# wvdial
SOURCE: SAKURA Internet Research Center (2020/05)