1.\" $OpenBSD: umb.4,v 1.14 2021/09/24 05:25:37 kevlo Exp $ 2.\" 3.\" Copyright (c) 2016 genua mbH 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: September 24 2021 $ 18.Dt UMB 4 19.Os 20.Sh NAME 21.Nm umb 22.Nd USB Mobile Broadband Interface Model (MBIM) 23.Sh SYNOPSIS 24.Cd "umb* at uhub?" 25.Sh DESCRIPTION 26The 27.Nm 28driver provides support for USB MBIM devices. 29.Pp 30MBIM devices establish connections via cellular networks such as 31GPRS, UMTS, and LTE. 32They appear as a regular point-to-point network interface, 33transporting raw IP frames. 34.Pp 35Required configuration parameters like PIN and APN have to be set 36with 37.Xr ifconfig 8 . 38Once the SIM card has been unlocked with the correct PIN, it 39will remain in this state until the MBIM device is power-cycled. 40In case the device is connected to an "always-on" USB port, 41it may be possible to connect to a provider without entering the 42PIN again even if the system was rebooted. 43.Sh HARDWARE 44The following devices should work: 45.Pp 46.Bl -tag -width Ds -offset indent -compact 47.It Dell DW5821e 48.It Ericsson H5321gw and N5321gw 49.It Fibocom L831-EAU 50.\" .It Huawei ME906s -- attaches but needs more work 51.It Medion Mobile S4222 (MediaTek OEM) 52.It Quectel EC25 53.It SIMCom SIM7600 54.It Sierra Wireless EM7345 55.It Sierra Wireless EM7455 56.It Sierra Wireless EM8805 57.It Sierra Wireless MC8305 58.El 59.Sh SEE ALSO 60.Xr intro 4 , 61.Xr netintro 4 , 62.Xr usb 4 , 63.Xr hostname.if 5 , 64.Xr ifconfig 8 , 65.Xr route 8 66.Rs 67.%T "Universal Serial Bus Communications Class Subclass Specification for Mobile Broadband Interface Model" 68.%U https://www.usb.org/document-library/mobile-broadband-interface-model-v10-errata-1-and-adopters-agreement 69.Re 70.Sh CAVEATS 71Devices which fail to provide a conforming MBIM implementation will 72probably be attached as some other driver, such as 73.Xr umsm 4 . 74