[Freeswitch-users] Mutiple GSMopen USB modem setup

Wed Dec 19 18:55:35 MSK 2012

I tried, not so hard, but it does not work. :( At least on Debian Wheezy.
Linux Udev system is changing too often, so I decided to use
/dev/serial/by-path/* for persistence.

2012/12/19 Giovanni Maruzzelli <gmaruzz at celliax.org>

> yep, seen that.
>
> I was hoping for something tried and true :).
>
> On Wed, Dec 19, 2012 at 1:35 PM, Dmitry Lysenko
> <dvl36.ripe.nick at gmail.com> wrote:
> > Here (http://wiki.e1550.mobi/doku.php?id=troubleshooting) you can find
> some
> > useful info and udev rules file.
> > Do not tried it yet, but it seems it can work. Maybe after slightly
> > patching.
> >
> >
> > 2012/12/19 Giovanni Maruzzelli <gmaruzz at celliax.org>
> >>
> >> Nandy and Dimitry,
> >>
> >> please let us know your findings.
> >>
> >> Thanks for sharing!
> >>
> >> -giovanni
> >>
> >> On Wed, Dec 19, 2012 at 4:46 AM, Nandy Dagondon <nandy1925 at gmail.com>
> >> wrote:
> >> > Hi Giovanni,
> >> >
> >> > I have not tested it yet. As mentioned by Dmitry, modem serial numbers
> >> > are
> >> > not accessible. Perhaps, mapping the serial port based on the USB port
> >> > where
> >> > they're connected would, at least, a workable solution somewhat as
> >> > discussed
> >> > in this post:
> >> >
> >> >
> >> >
> http://stackoverflow.com/questions/4800099/how-to-identify-multiple-usb-serial-adapters-under-ubuntu-10-1
> >> >
> >> > Rgds,
> >> > Nandy
> >> >
> >> >
> >> > On Tue, Dec 18, 2012 at 9:03 PM, Dmitry Lysenko
> >> > <dvl36.ripe.nick at gmail.com>
> >> > wrote:
> >> >>
> >> >> Hi!
> >> >> Huawei USB modems does not have accessible via USB protocol serial
> >> >> numbers. At least E1550, E153 and E171.
> >> >> Best wishes,
> >> >>  Dmitry.
> >> >>
> >> >>
> >> >> 2012/12/16 Nandy Dagondon <nandy1925 at gmail.com>
> >> >>>
> >> >>> Thanks for the feedback Giovanni.  Re fixing the ttyUSB port
> >> >>> assignment,
> >> >>> I have searched a guy made a script to scan USB serial numbers using
> >> >>> udev,
> >> >>> then created symbolic links. Will try it out later.
> >> >>> /Nandy
> >> >>>
> >> >>>
> >> >>>
> >> >>> On Thu, Dec 13, 2012 at 7:02 PM, Giovanni Maruzzelli
> >> >>> <gmaruzz at gmail.com>
> >> >>> wrote:
> >> >>>>
> >> >>>> On Thu, Dec 13, 2012 at 4:44 AM, Nandy Dagondon <
> nandy1925 at gmail.com>
> >> >>>> wrote:
> >> >>>> > I have run GSMOpen on CentOS 5.7 defying the Wiki advisory.
> >> >>>> > Questions:
> >> >>>>
> >> >>>> I would invite you to go for the OS distros detailed in the wiki
> >> >>>> page.
> >> >>>> You'll probably encounter problems with different distros, and
> you're
> >> >>>> on your own to solve it.
> >> >>>>
> >> >>>> > 1. What is the maximum number of USB modems tested? Can we get
> the
> >> >>>> > numbers
> >> >>>> > and the CPU used?
> >> >>>>
> >> >>>> I've heard about 48 concurrent, and 64. Me personally have tested
> >> >>>> with
> >> >>>> 5. No CPU consumption. The critical part is the USB BUS. So use
> >> >>>> cascading and POWERED good usb 2.0 hubs
> >> >>>>
> >> >>>> > 2. I'll be installing multiple modems each connected to a
> different
> >> >>>> > mobile
> >> >>>> > network. Is the /dev/ttyUSB assignments  constant for every
> modem?
> >> >>>> > Meaning
> >> >>>> > it doesn't change if I plug it on different USB jacks.
> >> >>>>
> >> >>>> it will change not only if you change USB port, but also randomly
> if
> >> >>>> you stay on the same USB port and reboot (and sometimes also
> without
> >> >>>> rebooting). That's a "feature" of Linux distros (a demented one,
> >> >>>> cannot understand why they choose this behavior).
> >> >>>>
> >> >>>> Soon or later I'll look into this, and come out with a solution
> (I've
> >> >>>> made some preliminary research and reasoning about in the past).
> >> >>>>
> >> >>>> If you have a commercial interest in that, and a real budget for
> it,
> >> >>>> contact me in private as consultant, or put a public bounty on it.
> >> >>>>
> >> >>>> -giovanni
> >> >>>>
> >> >>>> --
> >> >>>> Sincerely,
> >> >>>>
> >> >>>> Giovanni Maruzzelli
> >> >>>> Cell : +39-347-2665618
> >> >>>>
> >> >>>>
> >> >>>>
> >> >>>>
> _________________________________________________________________________
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> >> >>
> >> >> 
> >> >> 
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> >> >
> _________________________________________________________________________
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> >> >
> >> > 
> >> > 
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> >>
> >>
> >> --
> >> Sincerely,
> >>
> >> Giovanni Maruzzelli
> >> Cell : +39-347-2665618
> >>
> >>
> _________________________________________________________________________
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> >>
> >> 
> >> 
> >>
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> >
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>
>
> --
> Sincerely,
>
> Giovanni Maruzzelli
> Cell : +39-347-2665618
>
> _________________________________________________________________________
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> 
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