This read-create TruthValue controls whether the Multiplex Section Protection reverts automatically to the working facility once a fault clears; it does not apply when cmMSPGroupSwitchMode is dualactiverx. It governs whether the ring segment automatically returns to its original working termination once repaired, or stays on protect until an operator manually switches it back. For example, with revertive disabled, after a card is replaced and the working line restored, the ring stays on the protect termination until an operator issues a manual switch back.