We are investigating an issue with one of our call servers (A.Voiceless). DNS has been updated to route via B, which should ensure service is restored for those that are affected but it is worth forcing phones to re-register if you are having issues (some VoIP devices do not cache DNS properly).
Engineers on on their way to the datacentre. Calls and registrations are all being handled via our 'B' call server.
Engineers are onsite.
Hardware is being replaced.
Hardware replaced, and server online.
The faulty server has been repaired and back on line.