This read-write Integer32, in seconds from 1 to 65536, defines the long-duration timer used to flag a connection that has remained established beyond this threshold, triggering a notification to the MGC once it expires. Admins use it to catch calls that may be stuck or abnormally long-running, which can indicate a billing or resource-leak issue. For example, an admin concerned about calls that fail to hang up properly and consume resources indefinitely would tune this timer to trigger an alert notification sooner.