This accessible-for-notify IANAItuProbableCause value gives the standardized probable cause code explaining why a Media Gateway event occurred. It accompanies notifications such as rbnH248LinkStatusAlarm so an admin's NMS can automatically map the cause to a known ITU cause category rather than relying only on free-text information. For example, it might indicate a communications-subsystem-failure cause when the H.248 link to the MGC drops.