This object contains interval in minutes to wait
before attempting to switch back to working line.
Not applicable if the line is configured in
non-revertive mode, i.e. protection line will
continue to be active, even if failures on the
working line are cleared. The framer clears the
signal-fault and signal-degrade when APS switch
occurs. Please refer to 'csApsRevertive' for
description of non-revertive.