[Freeswitch-users] Any experience with DTMF from FreeSwitch to Sonus with Vega ATAs?

Ken Rice krice at freeswitch.org
Sun Feb 20 10:44:53 MSK 2011

Sonus is known to do stupid crap with DTMF... Can you get a good pcap with a
full end to end sip and rtp capture?


On 2/20/11 1:31 AM, "Yehavi Bourvine" <yehavi.bourvine at gmail.com> wrote:

> Hello,
>   Anyone has an experience with the above configuration? All sides are marked
> as RFC-2833 and the Sonus recognises most of the DTMF's twice.
> The Vega sends both RFC-2833 events and about 60msec of the DTMF tone
> (according to Vega's engineers it takes it about 60 msec to detect the DTMF
> tones).
> According to the RFC this is acceptable. The service provider I am working
> with says that it shouldn't be like that. Before I waste time in wars, has
> anybody had this issue and knows whether it is a matter of configuration at
> the Sonus side?
>                                    Thanks! __Yehavi:
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