[Freeswitch-users] g729 packets skipped in passthrough mode

[Javier Gallart]

>
> Hello
>

my mistake... I had written data="RTP_BUG_IGNORE_MARK_BIT" instead of
value="RTP_BUG_IGNORE_MARK_BIT". It's working now. Keep this in mind if you
ever happen to put a Huawei SBC in from of a FS!

Thanks

Javier

>
> ---------- Forwarded message ----------
> From: Javier Gallart <jgallartm at gmail.com>
> To: freeswitch-users at lists.freeswitch.org
> Date: Wed, 16 Feb 2011 13:28:35 +0100
> Subject: Re: [Freeswitch-users] g729 packets skipped in passthrough mode
> Hello,
>
> I've looked deeper into this issue and I might have hit a known problem:
>
> RTP_BUG_IGNORE_MARK_BIT = (1 << 2)
>
> /*
>   A Huawei SBC has been discovered that sends the mark bit on every single
> RTP packet.
>   Since this causes the RTP stack to flush it's buffers, it horribly messes
> up the timing on the channel.
>
>   This flag will do nothing when an inbound packet contains the mark bit.
>
>  */
>
> The carrier is actually a Huawei SBC, and the problem I reported only
> happens when it sends the marker bit  = true in all the rtp packets. I've
> tried
> <param name="auto-rtp-bugs" data="RTP_BUG_IGNORE_MARK_BIT"/> in the profile
> but the problem is still there, is this the right way to override this
> nonsense from the Huawei?
>
> Thanks
>
> Javier
>
>>
>> ---------- Forwarded message ----------
>> From: Anthony Minessale <anthony.minessale at gmail.com>
>> To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
>> Date: Tue, 15 Feb 2011 16:38:35 -0600
>> Subject: Re: [Freeswitch-users] FreeSWITCH-users Digest, Vol 56, Issue 177
>> Well that's all I could think of:
>>
>> passthrough is passthrough FS never modifies anything.
>> you need to look harder at sip trace, pcaps or other diagnostics for
>> some misconfiguration.
>> many people use this daily.
>>
>>
>> On Tue, Feb 15, 2011 at 1:12 AM, Javier Gallart <jgallartm at gmail.com>
>> wrote:
>> >
>> > Anthony, thanks for the tip. I haven't seen any change though. I should
>> have
>> > mentioned that I'm focusing in the rtp stream coming form the callee to
>> the
>> > caller. The problem is that FS relays to the caller only half of the
>> packets
>> > received from the callee. The packets arrive at FS at a rate of 1 packet
>> > every 20 ms, and with a payload of 20 bytes each. Packets from FS to the
>> > caller are sent every 40 ms with a payload of 20 bytes, thus skipping
>> half
>> > of the information.
>> >
>> > Thanks
>> >>
>> >> ---------- Forwarded message ----------
>> >> From: Anthony Minessale <anthony.minessale at gmail.com>
>> >> To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
>> >> Date: Mon, 14 Feb 2011 10:38:57 -0600
>> >> Subject: Re: [Freeswitch-users] g729 packets skipped in passthrough
>> mode
>> >> I bet its 20ms vs 30
>> >> set passthru_ptime_mismatch to true either in vars.xml or in your
>> >> dialplan both legs through export on the a leg or set in the a leg and
>> >> in the {} on b.
>> >>
>> >>
>> >> On Mon, Feb 14, 2011 at 10:28 AM, Brian West <brian at freeswitch.org>
>> wrote:
>> >> > What exactly is the problem?  I see no issue here can you elaborate
>> on
>> >> > what you're seeing?
>> >> >
>> >> > /b
>> >> >
>> >> > On Feb 14, 2011, at 4:48 AM, Javier Gallart wrote:
>> >> >
>> >> >> I've tried to explicitly set ptime at 20ms at switch.conf -although
>> >> >> it's not necessary afaik-. Has any one experienced this same issue?
>> >> >>
>> >> >> Thanks in advance..
>> >> >>
>> >> >> Regards
>> >> >
>> >> >
>>
>>
>
>
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