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UMB(4)                       Device Drivers Manual                      UMB(4)

NAME
     umb - USB Mobile Broadband Interface Model (MBIM)

SYNOPSIS
     umb*  at uhub? port?

DESCRIPTION
     The umb driver provides support for USB MBIM devices.

     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
     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.

HARDWARE
     The following devices should work:

           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/devclass_docs/MBIM10Errata1_073013.zip.

HISTORY
     The umb device driver first appeared in OpenBSD 6.0 and NetBSD 9.0.

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
     probably be attached as some other driver, such as u3g(4).

NetBSD 8.99.34                  August 1, 2018                  NetBSD 8.99.34