This read-create enumerated value controls whether this SPVC endpoint terminates segment-level OAM Fault Management cells and loops back segment OAM loopback cells, or is instead configured as a non-endpoint that passes such OAM cells through. An admin configures this to define where OAM fault-management boundaries lie along a multi-segment ATM path, which affects how failures are localized and reported for troubleshooting. For example, at the boundary of a network segment where OAM diagnostics should stop and be handled locally, the admin would set this to oamSegEp so this switch terminates and responds to segment OAM cells rather than forwarding them further.