This read-only enumerated value reports the operational state of a channel with a finer distinction than the basic common status field - separating an alarm condition (where the connection segment isn't actually broken) from a genuinely failed(4) state (where the segment is actually broken), a distinction the description notes applies only in a PNNI environment. Admins in PNNI-routed networks use this extra granularity to decide whether a channel merely needs monitoring (alarm) or requires active rerouting/repair (failed) since PNNI can act on a genuine break differently than a transient alarm. For example, a channel reporting failed in a PNNI environment might trigger the network's automatic rerouting logic, whereas one reporting alarm would not, since its underlying segment is still intact.