US Patent 11985187 Phone system failover management

Active-active standby is maintained for communication sessions using web connections between two active session zones and a standby session zone, for example, in the event of a failure. A first load balancer directs system management communications of a first datacenter to a first server of the first datacenter. A second load balancer directs the system management communications during a failure event to a second server. A database controller performs a failover based on the failure event.