[Voyage-linux] Connectivity problem via 3G USB modems

[Jordi Soucheiron]

Could it be a power problem? Some usb hubs do not provide enough juice for
3g modems

*Jordi Soucheiron*
Software Engineer
jsoucheiron at dexmatech.com

*DEXMA*
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2012/4/19 Konstantinos Birkos <kmpirkos at ece.upatras.gr>

> Once again, I am using the mailing list for an issue regarding
> connectivity through 3G USB modems.
>
> When I plug my ZTE MF110 modem directly to my board (an Alix 3D3), a
> /dev/gsmmodem is automatically created and I can use it in my connection
> configuration file to connect successfully.
> However, when I plug it in a USB hub, the /dev/gsmmodem is not created and
> I cannot connect via any of the /dev/ttyUSB* devices that are created.
>
> I have to mention that the problem appeared after I had used usbserial to
> have my ZTE modem plus  a Huawei e353 modem recognized as serial devices.
> Actually I tried to use usbserial because no devices were created when I
> plugged the Huawei modem despite the fact that it was successfully
> mode-switched.
>
> Any hint?
> Thank you in advance,
> Kostas
>
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