MS Teams Ringback
We have an issue where incoming calls from the carrier (ATT) to SBC to MS Teams. Not all calls have ring back to the caller and it can even be inconsistent to the point where 1 caller calls into Teams to the same person and each call is handled differently.
I was provided a doc for a HMR to convert the 183 Session message to a 180 ringing but the SBC does not seem to be picking up on the HMR. I have run debug traces to validate this.
Has anyone else run into this issue?