Re: New USB 3G modem

Hi Perazim,
	There's a few things you can do to get started:

try doing:
lsusb -v -d 0685:7000 # paste the log here

sudo su - # to become root, then
modprobe -a option
echo "0685 7000" > /sys/bus/usb-serial/drivers/option1/new_id
ls -l /dev/ttyUSB* # see if you have tty devices

if you have then try using 'screen' to talk to them in turn
(you might have to install it)
screen /dev/ttyUSB0
Ctrl-A k y

screen /dev/ttyUSB1
Ctrl-A k y

and repeat until finished, note which ports respond to ATI3, and which don't

Hope that helps,


On Thursday 08 September 2011, perazim portugalmail pt wrote:
> Dan, I am also working with the openWRT router project to get this
> modem working.
> After posting to that forum, someone came forward regarding this modem.
> They stated that usb_modeswitch was NOT used for this device and the
> modem was to be found on /dev/ttyUSB0. I have noticed that on windows
> that the drivers are installed everytime this device is plugged and
> this seems to confirm the non-use of usb_modeswitch. Also the is no
> evidence of usb_modeswitch in the syslog.
> On openWRT I was able to get this to connect once and pass traffic but
> it seems that I messed something up later.
> Shall I make a copy of the fake driver CD for you now?
> Thanks,
> Perazim
> On Fri, 2011-09-02 at 15:53 +0100, perazim portugalmail pt wrote:
> > I have a "generic" USB modem labeled "HSDPA  3.5G Wireless Modem" bought
> > from Deal Extreme in Hong Kong.
> > 
> > It works on Windows XP and installs its own drivers when plugged the
> > first time.
> > 
> > When plugged to Fedora 14, I see a CDROM detected and a USB storage
> > device if a microSDHC is plugged into the slot on the modem. I do not
> > see usb_modeswitch run and NetworkManager does not see this modem.
> usb_modeswitch needs the right logic to flip the device to modem mode,
> without that there's no change ModemManager can detect the modem,
> because it's not a modem yet.  After that, we may need to implement
> support for this device's specific quirks.  I usually ask users to
> zip/gzip up the contents of the "fake" driver CD and email it to me so
> that I can inspect the drivers and the connection manager and determine
> what AT commands (and thus what firmware variant) the device uses.  Then
> we can implement more than basic support for the device.
> > Using lsusb I see: ID 0685:7000 with no description whatever. There is
> > no file by this name in /etc/usb_modeswitch.d/
> > 
> > How do I add this modem to the appropriate tables so that it is
> > detected?
> If there is no entry for that device in usb_modeswitch's /etc directory,
> then you'll need to communicate first with the usb_modeswitch project
> and determine the sequence to flip the device to modem mode.  That might
> include installing a USB sniffer in Windows and sniffing the command
> sequences that the driver uses to tell the device to enter modem mode.
> The usb_modeswitch project is pretty good about helping people through
> that process.  Once that's done, we can proceed with inspecting the
> actual modem and determining what we need to do to get it connecting to
> the network.
> Dan
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> networkmanager-list gnome org

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