Amazon Chime Voice Connector – Features

Quality and Reliability: Amazon Chime Voice Connector supports fault-tolerant, cross-region inbound and outbound call routing to and from your phone system.In the event of loss of connectivity between an AWS region and your phone system, or if there is an issue with the Amazon Chime Voice Connector service in a region, calls will route to the other Amazon Chime Voice Connectors

https://aws.amazon.com/chime/features/voice-connector/