Re: ttyUSB* device for ModemManager

[Dan Williams <dcbw redhat com>]

On Fri, 2011-11-25 at 00:45 +0530, TechnoStab wrote:
> Thanks Dan,
> 
> I am using ZTE MF100 3g modem. I can see udev rules for the same modem 
> in /lib/udev/rules.d/77-mm-zte-port-types.rules.
> 
> ATTRS{idProduct}=="0031", ENV{.MM_USBIFNUM}=="03", 
> ENV{ID_MM_ZTE_PORT_TYPE_MODEM}="1"
> ATTRS{idProduct}=="0031", ENV{.MM_USBIFNUM}=="01", 
> ENV{ID_MM_ZTE_PORT_TYPE_AUX}="1"
> 
>  From the log, modem manager obtains two usb ports /dev/ttyUSB1 and 
> /dev/tyUSB2 but /dev/ttyUSB3 does not exist that it should be.
> 
> As you said, from windows its very easy to figure out what interface is 
> being used by modem and it also shows it's 3.

Do you happen to have the Windows drivers for the MF100 so I can take a
look at the INF files?

Dan

> Jaymin
> 
> On Tuesday 22 November 2011 01:34 AM, Dan Williams wrote:
> > On Mon, 2011-11-21 at 15:13 +0530, Jaymin Patel wrote:
> >    
> >> Hello,
> >>
> >>
> >> I am using modem that is not detected as /dev/ttyUSB0 instead its
> >> detected as /dev/ttyUSB1. Want to know how ModemManager selects
> >> ttyUSB* device for Mobile Broadband connection.
> >>      
> > MM selects the first port that passes probing as the main port (except
> > for Huawei modems where it always uses USB interface 0), unless it's
> > been "tagged" according to the udev rules.  Some modems only allow PPP
> > on specific USB interfaces, and for those we have to find the Windows
> > driver and look at the .INF files for which interface is supposed to be
> > the "modem" or PPP interface.  Note that USB interface numbers don't
> > directly correspond to the X in ttyUSBx (or ttyACMx).
> >
> > What modem is it that you're having trouble with?  It may be as simple
> > as getting the Windows driver and figuring out what the port mapping is
> > supposed to be.
> >
> > Dan
> >
> >
> >
> >    
>