[Freeswitch-users] Mutiple GSMopen USB modem setup

[Nandy Dagondon]

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
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
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>>> http://www.freeswitchsolutions.com
>>>
>>> 
>>> 
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>>
>>
>> _________________________________________________________________________
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>>
>> 
>> 
>>
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>
> _________________________________________________________________________
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> http://www.freeswitchsolutions.com
>
> 
> 
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