[Freeswitch-users] Late SDP causing switch to sendonly mode - one way calls (3PCC?)

[sagar malam]

I think your issue is similar to this one :
https://freeswitch.org/jira/browse/FS-8573

I am also facing it but with different scenario.

On Fri, May 24, 2019 at 10:26 PM Mike Jerris <mike at freeswitch.org> wrote:

>
>
> On May 24, 2019, at 8:54 AM, Callum Guy <callum.guy at x-on.co.uk> wrote:
>
> Hi All,
>
> In short I have an established bridged call out to a 3rd party SIP IVR -
> this IVR appears to be performing 3pcc meaning I am receiving RE-INVITEs
> w/o SDP as the call plays prompts, goes to queue and when it is answered.
> For each INVITE FreeSWITCH responds with 200 with SDP and we get an ACK
> back with SDP. During the queue phase the ACK SDP contains a=sendonly - all
> previous SDP have implied sendrecv on both sides. All is OK at this stage.
> When the call is finally answered we get an INVITE w/o SDP and FreeSWITCH
> responds with SDP including a=sendonly, to which the remote replies
> a=sendrecv. Hence we get one way audio at the time when the conversation
> should be starting.
>
> Can anyone help explain why FreeSWITCH would be switching to sendonly
> mode? I have enable_3pcc=true configured but otherwise this is a fairly
> standard/vanilla configuration. The behaviour I would expect is for
> FreeSWITCH to continue to omit the attribute and imply sendrecv.
>
>
> "During the queue phase the ACK SDP contains a=sendonly”
>
> Freeswitch is NOT switching it.. the other side is.
>
>
> Are there specific variables which might allow me to manage the SDP
> attributes?
>
> Please find a trace log attached.
>
> Platform:
> FreeSWITCH Version 1.8.5-6-31281a0bf1~64bit (-6-31281a0bf1 64bit)
> Linux my.network 4.9.0-8-amd64 #1 SMP Debian 4.9.144-3.1 (2019-02-19)
> x86_64 GNU/Linux
>
> Let me know if I can offer any more details regarding the implementation,
> thanks,
>
> Callum
>
>
>
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> <sdp-sendonly.log>
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>
> _________________________________________________________________________
>
> The FreeSWITCH project is sponsored by SignalWire https://signalwire.com
> Enhance your FreeSWITCH install with disruptive priced SMS and PSTN
> services.
> Build your next product on our scalable cloud platform.
>
> Join our online community to chat in real time
> https://signalwire.community
>
> Professional FreeSWITCH Services
> sales at freeswitch.com
> https://freeswitch.com
>
> Official FreeSWITCH Sites
> https://freeswitch.com/oss
> https://freeswitch.org/confluence
> https://cluecon.com
>
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-- 
Thanks,

Sagar
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