Media encryption mode non-functional / Sems-Yeti Support of SRTP

Correct, that is what I’m thinking too, something is not right after the upgrade as the disconnect initiator is from the Traffic Switch. Just FYI, the same setup works perfectly fine in 1.9 version, so, that’s is why I’m trying to understand if there was any other underlying change that I’m not aware or something missing out from the upgrade release note

Code 143 is exatly same situation as I described before.

You configured DTLS at gateway but your request contains SDES keys negotiation. Why you configured DTLS but trying to negotiate SDES? Fix your configuration.

Yes, and I have selected SRTP SDES as the encryption mode
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Actually, I found the issue, which apparently is working in yeti 1.9 where in, incorrect gateways assign to the customer auth somehow worked. Thanks for you help @dmitry.s
I will test the SRTP and keep you informed