This read-only counter, in cells, tracks the number of valid OAM cells in the egress direction of this channel before the class-of-service queue. An admin monitors outbound OAM cell counts to confirm fault-management and performance-monitoring traffic is being generated and forwarded correctly toward the far end of the connection. For example, if a continuity-check exchange is configured but this egress OAM count seems too low relative to the configured interval, the admin might investigate whether OAM generation is misconfigured on this switch.