FreeBSD Manual Pages
UMB(4) Kernel Interfaces Manual UMB(4) NAME umb -- USB Mobile Broadband Interface Model (MBIM) cellular modem driver SYNOPSIS device usb device umb In loader.conf(5): umb_load="YES" DESCRIPTION The umb driver provides support for USB MBIM devices. If the appropriate hardware is detected, the driver will be loaded automatically by dev- match(8). To load the driver manually, load it in loader.conf(5) or at the loader(8) prompt. 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. Required configuration parameters like PIN and APN have to be set with um- bctl(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 con- nect to a provider without entering the PIN again even if the system was rebooted. HARDWARE The umb driver should support any USB device implementing MBIM, including the following cellular modems: * Ericsson H5321gw and N5321gw * Fibocom L831-EAU * Medion Mobile S4222 (MediaTek OEM) * Sierra Wireless EM7345 * Sierra Wireless EM7455 * Sierra Wireless EM8805 * Sierra Wireless MC8305 SEE ALSO intro(4), netintro(4), usb(4), ifconfig(8), umbctl(8) Universal Serial Bus Communications Class Subclass Specification for Mobile Broadband Interface Model, http://www.usb.org/developers/docs/dev- class_docs/MBIM10Errata1_073013.zip. HISTORY The umb device driver first appeared in OpenBSD 6.0, NetBSD 9.0, and FreeBSD 15.0. AUTHORS The umb driver was written by Gerhard Roth <gerhard@openbsd.org> and ported from OpenBSD by Pierre Pronchery <khorben@defora.org>. CAVEATS The umb driver does not support IPv6. Devices which fail to provide a conforming MBIM implementation will proba- bly be attached as some other driver, such as u3g(4). FreeBSD ports 15.quarterly September 3, 2025 UMB(4)
NAME | SYNOPSIS | DESCRIPTION | HARDWARE | SEE ALSO | HISTORY | AUTHORS | CAVEATS
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=umb&sektion=4&manpath=FreeBSD+15.1-RELEASE+and+Ports.quarterly>