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

[Stanislav Sinyagin]

no, it's the physical capability of particular modem. Some of them
don;t have voice call capability at all. Some of them do have, and the
call is sent to the pins which are not wired on your PCB :)




On Mon, Jun 6, 2016 at 2:56 PM, Steven Ayre <steveayre at gmail.com> wrote:
> 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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>
>
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