[Freeswitch-users] Mutiple GSMopen USB modem setup

[Nandy Dagondon]

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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