Thank you all for the advices, appreciate that.
After many attempts/config changes  on our side, the issue was sorted out on the operator side, by tuning below SIP-trunk settings on Huawei SoftX3000 switch.

SIP Protocol related information

--------------------------------

Second Software parameter of signalling CTRL  =  Link with SBC

                                              =  Not transit 100rel label of Support head

                                              =  Not release call when receiving UPDATE response message without media body

                                              =  Control of whether 18X message carries Require: 100rel

                                              =  Whether to carry media to CC through Alerting

 

The last parameter “Whether to carry media to CC through Alerting” , according documentation means: “If this option is selected, it indicates that does not carry media to cc through Alerting”, I thought that the default value should be “1” for there to be audio, but this was an incorrect interpretation.


On Tue, Sep 22, 2020 at 6:13 PM Brian West <brian@freeswitch.com> wrote:
It's more than that, this is a standoff, each end is waiting for the other, so if you use execute_on_answer01=playback::silence_stream://500 it should get things moving.

/b


On Tue, Sep 22, 2020 at 8:29 AM Jurijs Ivolga <jurijs.ivolga@gmail.com> wrote:
Hi,

This is strange, I remember some time ago I tested this with one of my buggy provider, which wasn't sending RTP until it received anything and after setting "disable-rtp-auto-adjust=true" in the SIP profile Freeswitch started to send RTP first and then SIP provider replied with RTP too.

Have you tried to put this in SIP profile configuration?

This was quite some time ago, so maybe I'm mixing it up.

Jurijs


On Tue, Sep 22, 2020 at 2:05 PM Oleg Belousov <obelousov@gmail.com> wrote:
Hi.
Thank you.
Yes, I tried to set up that parameter in the profile as true, but that did not help. As far as I understand that is applicable for nated UAC, in my scenario there is no nat.

On Tue, Sep 22, 2020 at 12:01 PM Jurijs Ivolga <jurijs.ivolga@gmail.com> wrote:

On Tue, Sep 22, 2020 at 11:43 AM Oleg Belousov <obelousov@gmail.com> wrote:
Hi.
Met issue with prompt play (in lua, preanswer mode) - for certain reasons freeswitch wait for RTP packet from UAC side, and only after that started to play prompt. If UAC does not send RTP, the script does not execute further. Is there a way to instruct Freeswitch to send RTP packets first by itself?
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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

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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

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_________________________________________________________________________

The FreeSWITCH project is sponsored by SignalWire https://signalwire.com
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Join our online community to chat in real time https://signalwire.community

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