# Logical Rep Coordination (The Branch Couriers) These events occur when the Elephant is coordinating the transmission of data between different branch locations (Publisher and Subscriber) using **Logical Replication**. ![[LogicalApplySendData]] ![[LogicalParallelApplyStateChange]] ![[LogicalSyncData]] ![[LogicalSyncStateChange]] ![[WalReceiverExit]] ![[WalReceiverWaitStart]] ![[ReplicationOriginDrop]] ![[ReplicationSlotDrop]]