[Freeswitch-users] SIMCOM LTE modems with USB Audio

[Tom Hartnett]

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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