[Freeswitch-users] mod_gsmopen: are USB dongles the only option?

[Steven Ayre]

Might be you need to enable phone calls via an AT command.

On 6 June 2016 at 00:30, Stanislav Sinyagin <ssinyagin at gmail.com> wrote:

> those mPCIe 3G modems that I tried, are all visible as USB devices,
> with serial (ttyUSB) and (when supported) Ethernet devices associated
> with them.
>
> So, in theory, the audio signal would also be available in the same
> way as with the USB dongle... but so far, I haven't seen such a device
> yet.
>
>
>
> On Sun, Jun 5, 2016 at 4:40 PM, Giovanni Maruzzelli <gmaruzz at gmail.com>
> wrote:
> > Ciao Stanislav,
> >
> > the whole idea of gsmopen is to use cheap and ready available radio
> > interfaces, that maybe you can get off ebay or surplus.
> >
> > Also, they are undistinguishable from "normally used" dongles, and that
> is a
> > plus in a lot of countries.
> >
> > I don't know about pci modems that exposes an audio interface to the
> > operating system.
> >
> > Some soldering and demuxing will be probably needed.
> >
> > But at that point, I would go with Samgoma or Khomp cards...
> >
> > Also because for doing it well, a lot of engineering details are
> involved,
> > from shielding to low pass filtering, to magnetic interferences, etc
> >
> > Anyway, I like those things too! :)
> >
> > -giovanni
> >
> > sent from mobile
> > cell: +39 347 266 56 18
> > Giovanni Maruzzelli
> > OpenTelecom.IT
> >
> > Il 05/Giu/2016 16:06, "Stanislav Sinyagin" <ssinyagin at gmail.com> ha
> scritto:
> >
> > does anyone know a GSM/UMTS/LTE modem that has mini-PCIe interface and
> > is able to deliver voice signal that can be passed to mod_gsmopen?
> >
> > The only one that has any kind of voice signal that I found, is Huawei
> > MU609 and the like. But they deliver PCM voice as a raw signal on
> > mini-PCIe pins which are marked as "reserved" in the interface
> > specifications, so normally the boards don't have any wiring for those
> > pins.
> >
> > I just don't like the idea of an USB dongle, and there are many
> > hardware platforms with mini-PCIe interfaces. They work perfectly for
> > mobile data, but I couldn't find any option for voice.
> >
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