Peter Kay <[email protected]> wrote: > On Fri, 8 Jan 2021 at 16:47, Stefan Sperling <[email protected]> wrote: > > > > On Fri, Jan 08, 2021 at 05:13:52PM +0100, Patrick Wildt wrote: > > > > There's umb(4). It supports USB's MBIM standard. There are some MBIM > > > compatible chips around, one for instance is this one: > [..] > > I have umb(4) working on an APU1 board. It's a Sierra Wireless EM7345, the > > one > > shipped with x250 Thinkpads. Installation in an APU requires a compatible > > M.2 > > to miniPCIe adapter. Make sure to get an adapter with the correct M.2 > > keying. > > If the vendor advertises GSM/UMTS/LTE modem support the adapter should work. > > If they don't, better ask before buying. > > > > This combo works fine in the middle miniPCIe slot of the APU. You'll need a > > full size SIM card for the SIM card slot. Again, an adapter will help to fit > > a micro or nano SIM. > > > > You will also want LTE antennas and compatible pigtails. Using wifi antennas > > will result in about 50% packet loss. > > Much obliged, I see some of those cards are quite cheap on ebay, and I > don't need to have the absolute latest. > > Now to find antennas and pigtails to link to the card
Be careful. Cards listed with the right model could have older firmware which don't suppor the MBIM protocol natively, but instead the older MSM protocol. Or they have MBIM, but it is hidden from our driver. Thus you end up with umsm(4) support instead of umb(4). With umsm(4) you need to do ppp yourself, it is not a transparent network driver.
