[Freeswitch-users] Mutiple GSMopen USB modem setup

[Giovanni Maruzzelli]

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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>>
>> 
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>
>
> _________________________________________________________________________
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> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
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-- 
Sincerely,

Giovanni Maruzzelli
Cell : +39-347-2665618