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USB LTE modem passthrough problem

VladoB
in VM Engine (KVM)

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Hi friends, I bought Teltonica USB LTE modem which I planned to use for SMS gateway.

  1. When I want to connect to Windows 10 VM, I see it nicely in available device to PT

  2. When I PT to VM, I can see it in windows 10 machine

  3. I can install drivers, everything is OK

  4. After driver installation I do see COM5 serial port AT which is one I need to use for sending SMS

  5. When I connect to device via Putty/serial connection, I can communication with device send AT commands, send test SMS etc.

  6. But ONCE I CLOSE PUTTY, it looks that COM port is never fully released, because when I open putty again, it does not communication with modem any more.

  7. I need to unplug USB on host level (from Unraid VM template menu) and connect again so that it works again in VM, but behaviour is the same.

Is this known issue? Or do you have advice for me?

Thanks

Vladimir

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