Dame Nancy of the Confused #ITM

The scope is the tell. The FAA’s own words are “a communication issue impacting all Air Route Traffic Control Centers” — every ARTCC, not one. There is almost nothing physical common to all 22 centers. That points to a shared layer beneath the facilities: - the leased telecom transport that carries controller-to-pilot voice between centers and remote radio sites, or - the voice-switch layer that keys those frequencies. Controllers losing frequencies outright is a symptom at that layer, not a transmitter dying on a hilltop. And “rolling” — Kansas City first, then spreading — is what a shared network degrading looks like, not what a single equipment failure looks like.