[Freeswitch-users] SIMCOM LTE modems with USB Audio

Fri Apr 27 15:23:51 UTC 2018

I'd be glad to, but I don't have a budget on my own. Need to find the
funding first.

On Thu, Apr 26, 2018, 21:15 Giovanni Maruzzelli <gmaruzz at gmail.com> wrote:

> please do it, then let us know. Maybe do it for free, and donate it to the
> community.
>
> Thanks in advance
>
>
>
> On 25 April 2018 at 23:30, Stanislav Sinyagin <ssinyagin at gmail.com> wrote:
>
>> probably the most flexible option would be a small standalone daemon
>> that links the SIMCOM modem audio with a virtual PortAudio device.
>> Then you can have this stream in FreeSWITCH or in any other software
>> that is able to communicate with PA.
>>
>>
>>
>> On Wed, Apr 25, 2018 at 1:49 PM, Stanislav Sinyagin <ssinyagin at gmail.com>
>> wrote:
>> > Yes, it's clearly written in their documentation, that raw PCM is sent
>> in an
>> > USB UART device.
>> >
>> > Mod_gsmopen is too imperfect, to say politely. It's easier to create a
>> new
>> > module for UART audio than trying to adapt gsmopen for new modems.
>> >
>> > So, it only needs a budget for development.
>> >
>> >
>> >
>> >
>> >
>> > On Tue, Apr 24, 2018, 22:01 Tom Hartnett <hartnett.tom at gmail.com>
>> wrote:
>> >>
>> >> Funny you mention the Simcom as I'm testing the 7600AH now (unrelated
>> to
>> >> Freeswitch). The modems are odd in that they don't create a USB audio
>> >> endpoint in the traditional sense. You have to move the PCM voice over
>> their
>> >> UART interface. That requires a little extra work as I haven't really
>> found
>> >> a good driver to manage that.
>> >>
>> >> I'm really interested in these because I want to support VoLTE on
>> AT&T. We
>> >> haven't got that running yet, and my AT&T contact says there was an
>> issue
>> >> with provisioning this model in their database. Hopefully that will be
>> fixed
>> >> later this week.
>> >>
>> >> On Tue, Apr 24, 2018 at 3:28 PM, Stanislav Sinyagin <
>> ssinyagin at gmail.com>
>> >> wrote:
>> >>>
>> >>> hi,
>> >>>
>> >>> I wrote about a year ago about SIMCOM SIM7100 series LTE modems and
>> >>> that they support USB audio. Now the vendor offers also SIM7500 and
>> >>> SIM7600 modems, also with USB audio, and in addition these newer
>> >>> models support 16-bit audio streams.
>> >>>
>> >>> Unfortunately I didn't find the free time to make a FreeSWITCH module
>> >>> for them, but if someone wants to sponsor such a development, or
>> >>> actually develop it, I'll be glad to work together.
>> >>>
>> >>> I've got a SIM7100E modem, and SIM7500E is ordered and is on the way.
>> >>>
>> >>> The SIM7500 series is cheaper, but it only supports 10Mbps downstream
>> >>> for mobile data. The SIM7600 supports up to 150Mbps. But for voice
>> >>> applications, data transfer rate should be irrelevant in any way.
>> >>>
>> >>>
>> >>> cheers,
>> >>> stanislav
>> >>>
>> >>>
>> _________________________________________________________________________
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>> >>> http://www.freeswitchsolutions.com
>> >>>
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>> >>>
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>> >>
>> >>
>> >>
>> _________________________________________________________________________
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>> >> http://www.freeswitchsolutions.com
>> >>
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>> >> http://www.freeswitch.org
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>> >> http://www.cluecon.com
>> >>
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>> _________________________________________________________________________
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>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://confluence.freeswitch.org
>> http://www.cluecon.com
>>
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>>
>
>
>
> --
>
> Sincerely,
>
> Giovanni Maruzzelli
> OpenTelecom.IT
> cell: +39 347 266 56 18
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
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