[Freeswitch-users] Reinvite Issue / no SDP

[Michael Jerris]

does the sdp change but not change the version or is it 100% identical to
the previous we sent?

On Mon, Jul 31, 2017 at 5:28 AM Stefan Kainz 1012 <stefan.kainz at 1012.at>
wrote:

> Thank you for your answer!
>
> after investigating a few different cases, i came to the following
> conclusion:
> Some PBX's seem to not to accept the SDP Offer in the OK Message when the
> Session Version ID is not increased from the SDP Version ID in the initial
> Call Setup.
>
> Ever heard of such a behavior?
> What would you suggest to get by this issue?
>
> I also testet it on Version 1.6 and 1.6.17. Same issue here.
>
> Thank you in advance!
> regards,
> Am 28.07.2017 um 15:55 schrieb Brian West:
>
> 1.4 has been EOL for quite some time, you should try the last 1.4 release
> and you should test on the latest 1.6 release, If the issue persists
> collect the data per the reporting guidelines and file a JIRA.
>
> Thanks,
> /b
>
>
> On Thu, Jul 27, 2017 at 5:42 AM, Stefan Kainz 1012 <stefan.kainz at 1012.at>
> wrote:
>
>> Hello,
>>
>> We're using Freeswitch 1.4.18 on Debian 8.
>> We ran into a problem with internal call transfers, when the PBX sends a
>> re-invite without SDP offer.
>>
>> The Problem is as follows:
>>
>> 1) PSTN -> Freeswitch -> PBX -> Call is answered on extension 100, Audio
>> in both directions
>> 2) Extension 100 does an unattended transfer to extension 101
>> 2.1) PBX sends a re-invite without SDP. Freeswitch offers SDP in OK
>> message
>> 3) PBX acknoledges the OK message
>> 4) Freeswitch is sending media as announced in SDP Offer, but PBX doesnt
>> "receive" the audio. Also, no media from the PBX.
>>
>> Since we're a little desperate, we already tried the following settings:
>>
>> 1) 3pcc-enable true/false/proxy
>> 2) inbound-late-negotiation is set to true
>> 3) renegotiate-codec-on-reinvite true / false
>> 4) disable-transfer true / false
>> 5) enable-soa true / false ( it acutally does work when set to false,
>> but the call gets hangup after a few seconds of audio - ack timeout )
>>
>> We also tried to enable bypass_media, so that freeswitch doesnt mess
>> with SDP.
>> So, the SDP Offer is generated by a Sonus Media Gateway - still no luck.
>>
>> Any of you had some experience with such behavior?
>> We would be very thankful for every advice!
>>
>> have a nice day!
>>
>> Stefan Kainz
>>
>>
>> _________________________________________________________________________
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>
>
>
>
> --
>
> *Brian West*
> brian at freeswitch.org
>
> *Twitter: @FreeSWITCH , @briankwest*
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>
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