This shows the same active, AIS, or LOS status for the External Clock B timing input, the second of the node's two external reference feeds. Because most Cascade nodes pair External Clock A and B for redundant timing, this lets an admin confirm the B feed is healthy on its own; an ais(2) here while A is active(1) leaves the node fully synchronized but with no backup left if A also degrades. For example, after a carrier-side BITS clock swap, checking that nodeExternalClockBOperationalState returns to active(1) confirms the B reference recovered cleanly.