This Integer32, ranging from 5 to 525600 minutes, sets the inactivity timeout after which NAT translation-table entries for UDP traffic are aged out, defaulting to 15 minutes per its description. An admin tunes this to balance address/port reuse against connection longevity: too short and long-idle sessions get dropped, too long and the translation table fills with stale entries. For example, an admin supporting long-poll UDP sessions might raise this value toward the 525600-minute (one year) maximum instead of leaving it at the 15-minute default.