[Freeswitch-users] RTP delay with cng

[Jose Fco. Irles Durá]

So you consider that it is a bug and it is not a bad configuration, isn't
it?

Thanks

2015-02-12 16:43 GMT+01:00 Brian West <brian at freeswitch.org>:

> 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
>>
>> _________________________________________________________________________
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>
>
>
>
> --
>
> *Brian West*
> brian at freeswitch.org
>
>
> *Twitter: @FreeSWITCH , @briankwest*
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>
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>
> _________________________________________________________________________
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> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
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>
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-- 
Jose Fco. Irles Durá
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