[Freeswitch-users] Dropped and duplicated DTMF digits

[Steven Ayre]

Also whether you are / aren't using start_dtmf (if you're actually getting
RFC2833 don't use it).


On 22 July 2014 14:28, Michael Jerris <mike at jerris.com> wrote:

> can you confirm if this is still an issue in latest git master, and if so,
> please collect pcap and full debug log of the call and create a Jira.
>
> On Jul 22, 2014, at 9:06 AM, Chris Young <Chris.Young at enghouse.com> wrote:
>
>  Hi all,
>
>
>
> We are experiencing problems with DTMF collection using FreeSWITCH 1.4.6.
> The symptoms are missed or duplicated digits when decoding DTMF sent using
> RFC 2833 from Cisco phones; for example, given the sequence:
>
>
>
>                 1 2 3 4 5 6 7 8 9 0 #
>
>
>
> we might typically end up with something like this after FreeSWITCH has
> processed the received RTP:
>
>
>
>                 1 2 3 5 7 7 8 9 9 #
>
>
>
> Using Wireshark, we can see that all the expected RTP events are present
> on the wire but FreeSWITCH seems to have difficulty in processing them all
> consistently. I've tried setting the following manual RTP bugs (bit of
> guesswork here I'm afraid, these may or may not be relevant):
>
>
>
>                 IGNORE_DTMF_DURATION
>
>                 ACCEPT_ANY_PACKETS
>
>
>
> but unfortunately neither made any difference. Are there any other
> settings we could try which might help? Or is this a known problem with
> some other workaround?
>
>
>
> Regards,
>
> Chris
>
>
>
> Chris Young
> Software Engineer
> <image05853e.PNG>
> t:  +44 118 943 9249
> e:  Chris.Young at enghouse.com
> w: www.enghouseinteractive.co.uk
> <image3d627d.PNG>
>
>
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>
> 
> 
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>
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