Outgoing calls intermittent
For about a week we've been having intermittent issues with users not being able to make outgoing Teams PSTN calls. From what I can tell this is the only thing that isn't functioning correctly, as traditional internet browsing is working fine. This morning there were several that both could not make outgoing phone calls. I've tried calling our internet provider and they claim there is nothing wrong on their end. (which I guess i agree because there is more than one site) The users are calling from a Yealink mp54 phone with all the latest's updates, one user claimed he could not call from the teams client on his desktop as well. We have users that use Teams Calling plan numbers and others that have direct routing.. the users who use direct routing are able to make outgoing calls even when the Calling Plan numbers cannot. Is anyone else seeing this? Where is the best place to put in a microsoft ticket because the Voice Support insists I use the chat feature, which is also broken.
Edit: I should have noted that incoming calls and Queue calls are working fine.
EDIT: Update to what i found
It seems the most common for an outbound call NOT to work if the number being called is T-Mobile/USCellular. Calls to Verizon numbers appear to work consistently. When changing caller ID policy to Show User Number, I am able to make a call to T-Moble/USCellular numbers.
I also got this reply from TNSI customer support
"I found that xxx.xxx.xxxx was flagged and adjusted the score so calls will no longer be flagged. The other numbers are not flagged by our service. I understand that T-Mobile is using Hiya for spam filtering."
Even though I've registered all these numbers previously with HIYA, TNSI and First Orion. Apparently, they will still mark you as spam, after that.