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

[Giovanni Maruzzelli]

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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