[Freeswitch-users] Data modem (V32, V92) with SpanDSP
François
fdelawarde at wirelessmundi.com
Tue Feb 24 14:22:35 MSK 2015
Actually it's digital but later converted for compatibility with analog
modems, but your point is still valid!
Unfortunately, things don't get dropped as soon as we'd like them to...
Think about that abomination called T.38, when we've had email since the
70s! :-S
François.
On 02/20/2015 09:39 PM, Brian West wrote:
> Yes audio inside of a data connection over a data connection is how it
> should be done. /me bashes head on desk, this seems futile... There
> is this thin called the INTERNET, its already a data network, we
> should probably start using it! :P
>
> On Fri, Feb 20, 2015 at 11:37 AM, François
> <fdelawarde at wirelessmundi.com <mailto:fdelawarde at wirelessmundi.com>>
> wrote:
>
> I don't know about v.150, but lots of devices (telecare and other
> sh..ty IoT stuff) use V32 over crappy GSM modems. Right now can't
> talk to those without a "real" modem.
>
> Yeah, I know in 2015 they should be using IP over modern data
> connections (or even GPRS), but you know how it is...
>
> AFAIK, SpanDSP seems to be missing those "data modem" stuff (V32
> at 9600 and V92 at 56k)...
>
> François.
>
>
>
> On 02/20/2015 05:13 PM, Michael Jerris wrote:
>> One of the reasons that has kept any work ever happening on this
>> is we can't seem to find a single device that actually claims to
>> support v.150. Spandsp already has quite a bit of the modem code
>> for 9600 and 14400 but its not exposed to a data modem interface.
>>
>>
>>> On Feb 20, 2015, at 11:08 AM, Brian West <brian at freeswitch.org
>>> <mailto:brian at freeswitch.org>> wrote:
>>>
>>> You want v.150.1, GOOD LUCK!
>>>
>>> On Fri, Feb 20, 2015 at 9:13 AM, François
>>> <fdelawarde at wirelessmundi.com
>>> <mailto:fdelawarde at wirelessmundi.com>> wrote:
>>>
>>> Interesting.. Looks like some type of T38 for data-modem
>>> over VoIP. Unfortunately FS/SpanDSP don't support this AFAIK.
>>>
>>> Also I was thinking of using a PRI line (freetdm) to avoid
>>> VoIP issues.
>>>
>>> Thanks,
>>> François.
>>>
>>>
>>> On 02/20/2015 03:53 PM, Sergey Safarov wrote:
>>>> I not know FS support this scenario but this may be help you
>>>>
>>>> http://www.voip-info.org/wiki/view/Modem+over+VOIP
>>>> http://www.cisco.com/c/en/us/td/docs/ios/12_4t/12_4t4/mer_cg_15_1_4M.html
>>>> https://support.sonus.net/display/VXDOC/V.150.1+Device+Support
>>>>
>>>> On Fri, Feb 20, 2015 at 5:36 PM, François
>>>> <fdelawarde at wirelessmundi.com
>>>> <mailto:fdelawarde at wirelessmundi.com>> wrote:
>>>>
>>>> Self answer: Apparently SpanDSP does not support V32
>>>> nor V90/V92.
>>>>
>>>> Also I can't seem to find any other solution. The
>>>> objective was to fetch
>>>> data from remote GSM sensors using simple protocols
>>>> over V32 and similar...
>>>>
>>>> François.
>>>>
>>>>
>>>> On 02/20/2015 11:07 AM, François wrote:
>>>> > Hi all,
>>>> >
>>>> > As seen in the HylaFax wiki entry, mod_spandsp can be
>>>> used as a soft-modem.
>>>> > https://wiki.freeswitch.org/wiki/HylaFax
>>>> >
>>>> > Can it also be used as a data modem (not just fax
>>>> modem) with V32, V92
>>>> > or similar protocols?
>>>> >
>>>> > If not, does anyone know of any data-modem software
>>>> that could work
>>>> > along with FreeSWITCH?
>>>> >
>>>> > Thanks,
>>>> > François.
>>>> >
>>>> >
>>>> _________________________________________________________________________
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>>>>
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>>>>
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>>>
>>>
>>> _________________________________________________________________________
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>>>
>>>
>>> --
>>>
>>> */Brian West/*
>>> brian at freeswitch.org <mailto:brian at freeswitch.org>
>>>
>>>
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>>
>>
>>
>> _________________________________________________________________________
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>>
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>
>
> _________________________________________________________________________
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> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
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>
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>
>
>
> --
>
> */Brian West/*
> brian at freeswitch.org <mailto:brian at freeswitch.org>
>
>
> */Twitter: @FreeSWITCH , @briankwest/*
> http://www.freeswitchbook.com
> http://www.freeswitchcookbook.com
>
> *T:*+19184209001 | *F:*+19184209002 | *M:*+1918424WEST (9378)
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>
>
>
> _________________________________________________________________________
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> http://www.freeswitchsolutions.com
>
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>
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