I was reviewing logs on our Unity servers last week and saw some strange entries that I haven't been able to find good explanations for. They are similar to the one below. I've omitted everything after 'DtmfAccessId=' since there was user information...

Hello, I am seeing a strange message on some Unity servers after an upgrade. We're currently running 11.5, previously running 9.2. I have uploaded a screenshot of the error, but I can't identify what hardware settings are incorrect or where. The VMs ...