A read-write enumerated value controlling the row status of a DSL circuit entry, where only active, createAndGo, and destroy are actually supported despite other RowStatus values being listed. An admin creates a new circuit by setting this to createAndGo and removes one by setting it to destroy, making this the primary lifecycle control for virtual circuits in this table. To decommission a customer's virtual circuit, the admin would set its cmSubIfaceRowStatus to destroy, since the notInService and createAndWait states aren't actually supported on this system.