On April 10 and 11, CPU, IO, and network contention within a shared tenancy environment led to service degradation. The interruption was in connection to a data center upgrade project that has been underway for several months and is now complete. In April, the final phase of migration away from legacy architecture was initiated. The disruptions on April 10 and 11 were the result of the temporary use of a third-party cloud provider—a maintenance step during the infrastructure upgrade that was required in the process of moving to new architecture. That provider experienced a service interruption that directly impacted Cytracom voice customers. The project is now complete, and all VoIP users have been migrated to the new data center architecture as intended.