[Freeswitch-users] DTMF 2833 not working when switching to dynamic payload type 96

Anthony Minessale anthony.minessale at gmail.com
Fri Jun 30 19:00:22 UTC 2017


You would have to get a full log and file that to JIRA
https://freeswitch.org/jira
The mailing list is not for reporting bugs.



On Thu, Jun 29, 2017 at 6:58 PM, John Narduchi <johnnarduchi at gmail.com>
wrote:

> Having some trouble getting DTMF to work where an INVITE comes into
> FreeSWITCH offering a=rtpmap:101 telephone-event/16000. FreeSWITCH responds
> with a=rtpmap:96 telephone-event/8000 but then is unable to change the
> payload type to 96.
>
> This invite is a bit out of the ordinary as it does not specify
> telephone-event/8000.
>
> INVITE SDP
>
> *m=audio 63244 RTP/AVP 9 0 101*
> *b=AS:80*
> *a=rtpmap:101 telephone-event/16000*
> *a=fmtp:101 0-15*
> *a=ptime:20*
> *a=rtcp-xr:voip-metrics*
> *a=sendrecv*
>
> //fs logs after INVITE
> *2017-06-29 19:28:47.475013 [DEBUG] switch_core_media.c:4192 Set
> telephone-event payload to 101 at 16000*
> *2017-06-29 19:28:47.475013 [DEBUG] switch_core_media.c:4596
> sofia/external/1231231234 at X.X.X.X Set 2833 dtmf send payload to 101 recv
> payload to 101*
>
>
> FreeSWITCH then replies with the following SDP.
>
> *m=audio 33734 RTP/AVP 0 96*
> *a=rtpmap:0 PCMU/8000*
> *a=rtpmap:96 telephone-event/8000*
> *a=fmtp:96 0-16*
> *a=silenceSupp:off - - - -*
> *a=ptime:20*
>
> When the digits come in to FS they are type 96, confirmed via tcpdump
> however FreeSWITCH doesn't recognize them and this entry shows up in the
> logs when digits are entered.
>
> *2017-06-29 19:29:02.975006 [WARNING] switch_core_media.c:2563 Could not
> change to payload type 96, ignoring...*
> *2017-06-29 19:29:02.975006 [DEBUG] switch_core_media.c:2540 alternate
> payload received (received 96, expecting 0)*
>
> Sofia.conf.xml and external.xml are vanilla. Have tested liberal-dtmf=true
> but no luck. Tested on version 1.6.10 and 1.6.18. Was hoping someone might
> have a setting to try or any suggestions?
>
> Thanks!
>
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-- 
Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬

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