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Manual Pages  — U3G

NAME

u3g – USB support for 3G and 4G cellular modems

CONTENTS

SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file: device usb device ucom device u3g

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): 

u3g_load="YES"

If neither of the above is done, the driver will be automatically loaded by devd(8) when the device is connected.

DESCRIPTION

The u3g driver provides support for USB-to-serial interfaces exposed by many 3G and 4G modems. The supported adapters provide the necessary modem port for ppp(8), or net/mpd5 connections. Depending on the specific device, extra ports provide other functions such as an additional command port, diagnostic port, GPS receiver port, or SIM toolkit port.

The device is accessed through the ucom(4) driver which makes it behave like a tty(4).

In some adapters a mass storage device supported by the umass(4) driver is present which contains Windows and Mac OS X drivers. The device starts up in disk mode (TruInstall, ZeroCD, etc.) and requires additional commands to switch it to modem mode. If your device is not switching automatically, please try to add quirks. See usbconfig(8) and usb_quirk(4).

HARDWARE

The u3g driver supports the following cellular modems:

Many more are supported, see /sys/dev/usb/serial/u3g.c for the complete list.

FILES

/dev/ttyU*.* for callin ports
/dev/ttyU*.*.init
/dev/ttyU*.*.lock
  corresponding callin initial-state and lock-state devices

/dev/cuaU*.* for callout ports
/dev/cuaU*.*.init
/dev/cuaU*.*.lock
  corresponding callout initial-state and lock-state devices

EXAMPLES

Connect to the Internet using the default configuration: 
ppp -background u3g

SEE ALSO

tty(4), ucom(4), usb(4), usb_quirk(4), devd(8), ppp(8), usbconfig(8)

HISTORY

The u3g driver appeared in FreeBSD 7.2, is based on the uark(4) driver, and written by Andrea Guzzo <Mt aguzzo@anywi.com> in September 2008.

AUTHORS

The u3g driver was written by Andrea Guzzo <Mt aguzzo@anywi.com> and Nick Hibma <Mt n_hibma@FreeBSD.org>. Hardware for testing was provided by AnyWi Technologies, Leiden, NL.

CAVEATS

The Quectel EM160R is not officially supported in PPP mode. In order to use it in PPP mode, the ctsrts option needs to be turned off, for example, by adding:

    set ctsrts off

to /etc/ppp/ppp.conf in the correct section.

BUGS

The automatic mode switch from disk mode to modem mode does not work unless the driver is either built into the kernel or loaded before the device is connected.

The GOBI-based devices require the gobi loader available from the sysutils/gobi_loader port.

U3G (4) December 5, 2024
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