You may want to look into the client logs for understanding what is causing the call to be terminated. A missing ACK will end up tearing down the communication after 32s, so Rob is likely pointing you to the right issue…
> On 31 Aug 2021, at 16:26, Rob Dyck <email@example.com
> I haven't tried flexisip so I can't help much there.
> If the parties were able to speak for 30 seconds then I think you are missing
> the ACK. If there is no audio or only one way audio, linphone will give up
> waiting. Have you tried disabling all the firewalls for testing purposes?
> On Tuesday, August 31, 2021 1:15:30 A.M. PDT medo befroh wrote:
>> I didn't find anything in Wireshark and flexisip logs. I noticed this is an
>> error that almost all flexisip users have.
>> If someone have faced the same issue, please tell me how you solved it.
>> De : Rob Dyck <firstname.lastname@example.org
>> Envoyé : lundi 30 août 2021 17:39
>> À : email@example.com
>> Cc : medo befroh <firstname.lastname@example.org
>> Objet : Re: [Linphone-developers] Urgent : The call ends at 30 seconds
>> Typical causes
>> Callee didn't receive ACK after sending 200OK
>> One or both parties did not detect media
>> Wireshark is useful if not using encryption.
>> On Monday, August 30, 2021 8:24:40 A.M. PDT medo befroh wrote:
>>> Hello Community,
>>> I have installed flexisip successfully, all features(chat, calls..) are
>>> working, but i have a problem just after 30 seconds of calling, it ends
>>> automatically and i have not found the cause of this issue.
>>> If you have faced the same issue, please tell me how you solved it.
>>> Thanks in advance
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