We were able to push a fix that resolved the source of the problem, and all the features of the Highfive service have been fully restored.
Feb 16, 14:13 PST
Through our mitigation strategies, Call Me and Dial Out are working again, however the root cause is not fully resolved. Please feel free to use these features again while we work to fully resolve the issue and prevent it from reoccurring. We will be doing our best to make sure the features continue to function while we work on addressing the root cause.
Feb 16, 11:57 PST
The Call Me feature and Dial Out (from a Dolby Device) features are impacted at this time, and calls will not complete. We are working to restore service as quickly as possible in recognition of how important these features are to daily meetings.
For users joining by phone, the "Get a dial-in number instead" feature (just below the Call Me option on the page) is fully functional and can be used as a workaround in the meantime.
Feb 16, 10:43 PST
We have had reports of the Call Me feature not connecting phones into Highfive meetings. We are investigating and will provide updates as soon as they become available.
If you are encountering this problem, you can have a meeting participant generate a dial-in number for you in the meantime and will be able to successfully join by phone that way.
Feb 16, 10:31 PST