Gamma's cloud clusters
Yet another case of a cloud provider overselling the product. What does Gamma's cloud run on in the backend? While you're at it, please define 'cloud', as it seems to mean something different depending who is telling it.
“It’s still down and more than 30 minutes. 8 care homes without phones. really critical resolved soon. Why can’t we divert phones as promised when entered into contract?!” link
Because when you signed the contract, you transferred your phones on a VoIP service running on the same cloud service as Gamma, with no provision for falling back to the legacy system.