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

[Konstantinos Birkos]

Yes, eventually it was a hub problem. Thank you all.

On 04/20/2012 10:46 AM, Jordi Soucheiron wrote:
> 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 <mailto:jsoucheiron at dexmatech.com>
>
> *DEXMA*
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>
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>
>
> 2012/4/19 Konstantinos Birkos <kmpirkos at ece.upatras.gr 
> <mailto: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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>

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