We are developing a VOIP system with ESP-ADF and the project is working without relevant problems. We are testing the system with 2.7 ADF version, TekSIP 4.2 and MicroSIP software.
The problem start when we use one ATCOM VOIP phone. With MicroSIP and TekSIP we cannot see problems and when the ESP32 system starts the call, also works smoothly.
But when the call is initiated from ATCOM VOIP, the phone sends a BYE nearly immediately.
- 1.png (28.16 KiB) Viewed 8100 times
If you compare with MicroSIP, it's possible to see that the result is different, starting RTP media before ACK:
- 2.png (43.34 KiB) Viewed 8100 times
I add this communication showing the same with Zoiper, also working, I think it´s important how Zoiper send a quick empty RTP frame:
- 3.png (60.27 KiB) Viewed 8100 times
Without the source code of libesp_media_protocols.a we cannot test the conditions.
Could you give us some hints o help to debug the problem?
Thanks.