[Freeswitch-users] Data modem (V32, V92) with SpanDSP

Fri Feb 20 19:13:59 MSK 2015

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> 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.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 <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 <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 <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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