[Freeswitch-users] start_dtmf false positives

[Alexey Sibyakin]

Have you tried spandsp_start_dtmf? It has its quirks but after some tuning
It worked for me much better than start_dtmf.

On Tue, Jan 30, 2018 at 1:15 AM, Steve Underwood <coppice12 at gmail.com>
wrote:

> The false positive rate for the DTMF decoder in spandsp is extremely low.
> Tests show it has one of the lowest false positive rates in the industry.
> If you are seeing significant false positives you might actually have some
> DTMF in the audio. Can you capture some troublesome audio to a file for
> analysis?
>
> Regards,
>
> Steve
> On 01/29/2018 02:35 PM, Roman Dissauer wrote:
>
> Hi Guys,
>
> we have troubles reliably recognizing DTMF tones by using dialplan
> application start_dtmf.
> From our carriers we get some calls with inband DTMF and some with
> RFC2833. To our customers we need to always do RFC2833. Therefore we check
> SDP information and enable start_dtmf when RFC2833 is not available on the
> incoming call. When start_dtmf is executed we have a lot of false positives
> mostly at the start of audio but also during the call.
>
> Is there a way to prevent false DTMF detection? Does anyone have same
> issues and a solution for it?
>
> Kind regards
> Roman Dissauer
>
> *RDI SOLUTIONS e.U.*
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>
>
>
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Alex Sibyakin | Support Engineer
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