This sets the Wait-To-Restore period in seconds -- how long the system waits after a fault condition clears before reverting traffic back to the working line in revertive mode -- specifically to prevent rapid oscillation if the underlying condition is itself intermittent, and its 0-720 second range spans everything from immediate reversion up to the 5-12 minute range that industry standards GR-253-CORE and G.783 specify, though the latter permits shorter periods too. An admin dealing with a working line known to be flaky would set this toward the higher end of the range to avoid repeated disruptive switch-backs, while an admin confident the fault is truly resolved might set a shorter WTR to restore optimal routing sooner. For example, setting this to 300 seconds (5 minutes) aligns with the low end of the standards-recommended WTR range, giving the previously-faulted working line 5 minutes of stability before traffic reverts back to it.