[Freeswitch-users] USB GSM Dongle with FreeSwitch for voice calls

[Dušan Dragić]

I agree, it's always a good idea to use a powered usb hub with these
modem. As Giovanni said they are power hungry.

As for the Raspberry Pi, if anyone is thinking of using it for
anything serious on the usb bus (not just usb gsm/3g modems) - just
don't. Usb support on Rpi's SoC is horrible, and it's unlikely
(impossible?) to get fixed.

Shlomi,
how far did you get with your efforts (modem reconnect). If/when you
have some code for others to look at maybe you could put it on
freeswitch stash or github etc.
I was thinking about doing some work in this area (as time permits)
and would like to avoid duplicating effort.

On 29 September 2014 14:02, Giovanni Maruzzelli <gmaruzz at gmail.com> wrote:
> Kernel panics have probably to do with drivers, udev and kernel versions...
>
> What distro, kernel, drivers, udev, etc uses when successful and when
> panics?
>
> Please you all, list them here...
>
>
>
> Sent from Mobile
>
> Giovanni Maruzzelli
> +39 347 266 56 18
>
> On Sep 29, 2014 2:00 PM, "Daniel Ivanov" <sertys at gmail.com> wrote:
>>
>> I also use a hub with external power supply, but that hardly cures the
>> problem. On a normal x64 system, i seldom get usb errors, but the kernel
>> doesn't panic. On the Pi i get the same bus or mem errors and it panics to
>> need restart.
>>
>> On Mon, Sep 29, 2014 at 12:17 PM, Giovanni Maruzzelli <gmaruzz at gmail.com>
>> wrote:
>>>
>>> nice!!!
>>>
>>>
>>>
>>> Sincerely,
>>>
>>> Giovanni Maruzzelli
>>> Cell : +39-347-2665618
>>>
>>> On Mon, Sep 29, 2014 at 12:14 PM, rumodigital
>>> <webmaster.rumodigital at gmail.com> wrote:
>>>>
>>>> I decided not to add more than five to avoid heat and maintain
>>>> stability, so working with a margin of safety devices and distance to allow
>>>> for ventilation.
>>>>
>>>> Not heats and works very well.
>>>>
>>>> 2014-09-29 11:01 GMT+01:00 Giovanni Maruzzelli <gmaruzz at gmail.com>:
>>>>>
>>>>> seems a good one, with power enough to add another additional dongle,
>>>>> for a total of 5 concurrent.
>>>>>
>>>>> Do it get too much warm?
>>>>>
>>>>> -giovanni
>>>>>
>>>>> Sincerely,
>>>>>
>>>>> Giovanni Maruzzelli
>>>>> Cell : +39-347-2665618
>>>>>
>>>>> On Mon, Sep 29, 2014 at 11:57 AM, rumodigital
>>>>> <webmaster.rumodigital at gmail.com> wrote:
>>>>>>
>>>>>> Hi Giovanni,
>>>>>>
>>>>>> I'm in the testing phase in a Mini ITX board (Atom D2550 + debian 7.6
>>>>>> 32b) and DUB-H7 USB HUB. I use 4 devices simultaneously (4x 500ma = 2A) and
>>>>>> yet everything perfect!
>>>>>>
>>>>>> 7-Port USB 2.0 Hub (500ma on all seven front ports, but 3A in total)
>>>>>>
>>>>>> http://www.dlink.com/uk/en/home-solutions/connect/usb/dub-h7-7-port-usb-2-0-hub
>>>>>>
>>>>>> Do you recommend some other HUB?
>>>>>>
>>>>>> Doug
>>>>>>
>>>>>> 2014-09-29 10:23 GMT+01:00 Giovanni Maruzzelli <gmaruzz at gmail.com>:
>>>>>>>
>>>>>>> all this kind of problems come from lack of USB bus electrical power.
>>>>>>>
>>>>>>> Use a wall powered (eg: with a "brick" power supply) USB hub between
>>>>>>> FreeSWITCH and dongle.
>>>>>>>
>>>>>>> No software way to go around this.
>>>>>>>
>>>>>>> And be sure the hub deliver enough power! (check the specs for your
>>>>>>> dongles power needs, add them up and use an USB hub with more than that
>>>>>>> continous power delivery).
>>>>>>>
>>>>>>> Internet dongles are power hungry !
>>>>>>>
>>>>>>> -giovanni
>>>>>>>
>>>>>>>
>>>>>>> Sincerely,
>>>>>>>
>>>>>>> Giovanni Maruzzelli
>>>>>>> Cell : +39-347-2665618
>>>>>>>
>>>>>>> On Mon, Sep 29, 2014 at 11:12 AM, rumodigital
>>>>>>> <webmaster.rumodigital at gmail.com> wrote:
>>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> Really, can be a major headache, many problems can be solved with
>>>>>>>> the use of a self powered USB hub... yet I had no problems, but for example,
>>>>>>>> I tested with an old pc I have, and when he received a call the module
>>>>>>>> disconnected and blocked the USB port.
>>>>>>>>
>>>>>>>> Which versions of Pi and what model of hardware that use?
>>>>>>>>
>>>>>>>> Doug
>>>>>>>>
>>>>>>>>
>>>>>>>> _________________________________________________________________________
>>>>>>>> Professional FreeSWITCH Consulting Services:
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>>>>>>>>
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>>>>>>>>
>>>>>>>> 
>>>>>>>> 
>>>>>>>>
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>>>>>>>
>>>>>>>
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>>>>>>>
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>>>>>>>
>>>>>>> 
>>>>>>> 
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>>>>>>
>>>>>>
>>>>>>
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>>>>>>
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>>>>>>
>>>>>> 
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>>>>>
>>>>>
>>>>>
>>>>>
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>>>>>
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>>>>>
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>>>>> 
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>>>>
>>>>
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>>>>
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>>
>>
>> _________________________________________________________________________
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>>
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>
>
> _________________________________________________________________________
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>
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-- 
Dušan Dragić