At 10:38 UTC 6th November 2018, an elevated number of calls failing with Error 0 was identified for calls originating in our North American Data Center. All traffic was switched to the South East Asia Data Center at 11:57. The issue was resolved and normal serviced returned at 11:58 UTC.
An issue with the underlying server processing the TTS API requests caused the server to be unable to resolve DNS records and route the calls correctly.
A program of work has been identified that includes: