[Freeswitch-users] RTP delay with cng

[Brian West]

Bug reports belong in JIRA.

On Thu, Feb 12, 2015 at 4:50 AM, Jose Fco. Irles Durá <josefu at gmail.com>
wrote:

> Hi,
>
> I have a FreeSWITCH 1.4.15 (from debian repositories), but I've been
> having a problem for a long time (with older versions too) and I don't
> know if it is a configuration problem or a bug.
> The FreeSWITCH runs on an openvz machine and this server is not overloaded.
> Before testing with trunk branch I want to share my problem looking
> for help to solve it (it's in production)
>
> I have an issue with some providers that send to my FreeSWITCH CN
> packets. When this happens, the other call leg has a terrible delay
> and bad quality sound.It starts with a little delay, but during the
> call the delay increases more and more.
>
> Capturing with wireshark and decoding rtp stream I can see 31% of
> packets dropped by Jitter Buff in the leg in wich the delay occurs
> (from FreeSWITCH IP to the other endpoint)
>
> I don't have any problem when the provider doesn't send CN packets.
>
> If I configure FreeSWITCH not to negotiate "comfort noise"  (profile:
> supress-cng=true), the provider sends cn packets too.
>
> I tried with no luck variables such as:
>
> - send_silence_when_idle (with values "400" and "true")
> - bridge_generate_comfort_noise=true
>
>
>
> The rtp related params of my sofia profile are:
>
> rtp-timer-name=soft
> inbound-zrtp-passthru=false (don't use zrtp)
> rtp-timeout-sec=300
> rtp-hold-timeout-sec=1800
> inbound-late-negotiation=true
> NDLB-allow-bad-iananame=true
> supress-cng=true
> vad=none
> t38-passthru=true
> inbound-codec-prefs=PCMA,PCMU,G722,GSM
> outbound-codec-prefs=PCMA,PCMU,G722,GSM
>
> In the dialplan the only variables that I set related with rtp are:
>
> set inherit_codec=true
> export absolute_codec_string=${ep_codec_string}
>
> Thanks in advance
> --
> Jose Fco. Irles Durá
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org




-- 

*Brian West*
brian at freeswitch.org


*Twitter: @FreeSWITCH , @briankwest*
http://www.freeswitchbook.com
http://www.freeswitchcookbook.com

*T:*+19184209001 | *F:*+19184209002 | *M:*+1918424WEST (9378)
*iNUM:*+883 5100 1420 9001 | *ISN:*410*543 | *Skype:*briankwest
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20150212/2898d13a/attachment.html