This read-create TruthValue indicates whether this interface is capable of ATM VC merge; per the MIB, it must be set to true(0) if the interface supports merging multiple incoming label-switched VCs into one outgoing VC, and false(1) otherwise (note the unusual true/false numbering in this definition), defaulting to false. Admins set this to reflect the interface hardware's actual VC merge capability, which affects how many labels are needed for a given set of LSPs. For example, an interface whose ATM hardware supports cell interleaving and VC merge would have this set to true(0) to allow multiple LSPs to share a single outgoing VC.