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.Dd August 24, 2019 .Dt UMB 4 .Os .Sh NAME .Nm umb .Nd USB Mobile Broadband Interface Model (MBIM) .Sh SYNOPSIS .Cd "umb* at uhub? port?" .Sh DESCRIPTION The .Nm driver provides support for USB MBIM devices.
p MBIM devices establish connections via cellular networks such as GPRS, UMTS, and LTE. They appear as a regular point-to-point network interface, transporting raw IP frames.
p Required configuration parameters like PIN and APN have to be set with .Xr umbctl 8 . Once the SIM card has been unlocked with the correct PIN, it will remain in this state until the MBIM device is power-cycled. In case the device is connected to an "always-on" USB port, it may be possible to connect to a provider without entering the PIN again even if the system was rebooted. .Sh HARDWARE The following devices should work:
p l -tag -width Ds -offset indent -compact t Ericsson H5321gw and N5321gw t Fibocom L831-EAU t Medion Mobile S4222 (MediaTek OEM) t Sierra Wireless EM7345 t Sierra Wireless EM7455 t Sierra Wireless EM8805 t Sierra Wireless MC8305 .El .Sh SEE ALSO .Xr intro 4 , .Xr netintro 4 , .Xr usb 4 , .Xr ifconfig.if 5 , .Xr ifconfig 8 , .Xr umbctl 8 .Rs .%T "Universal Serial Bus Communications Class Subclass Specification for Mobile Broadband Interface Model" .%U http://www.usb.org/developers/docs/devclass_docs/MBIM10Errata1_073013.zip .Re .Sh HISTORY The .Nm device driver first appeared in .Ox 6.0 and .Nx 9.0 . .Sh AUTHORS .An -nosplit The .Nm driver was written by .An Gerhard Roth Aq Mt gerhard (at] openbsd.org and ported from .Ox by .An Pierre Pronchery Aq Mt khorben (at] defora.org . .Sh CAVEATS The .Nm driver does not support IPv6.
p Devices which fail to provide a conforming MBIM implementation will probably be attached as some other driver, such as .Xr u3g 4 .
Indexes created Mon Sep 22 05:09:51 GMT 2025