Hanging or invalid CEX IRQ: All CEM's on the upper CEX bus segment are disabled
have a PM891 which has a CEX bus error, the error is: Error on backup unit, Backup CPU stopped, Hanging or invalid CEX IRQ: All CEM's on the upper Cex bus segment are disabled, Hanging or invalid CEX IRQ: A PM has been shut down, Redundant mode enabled.
There is also several "connection down" displayed in the CI867 oveview on several gateway's. However most of the gateway channels are working
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