As of 10:10 pm CDT last night, May 12, our voice provider has confirmed these issues have been resolved.
Monitoring · UTC
Our voice provider has implemented a fix for the issue, and we will be monitoring our voice services for any continued issue.
Investigating · UTC
Our voice provider has advised us of inbound and outbound calling issues. Our voice provider is working on identifying the problem and resolving it as quickly as they can. I will update this as soon as we know more.