This Integer32 in seconds (0 or 60..2147483647) is described as the idle timeout for a dialup connection, used only when the map's type is isakmpDialup, with 0 turning the timer off and 60 seconds as the minimum non-zero value. An admin sets this to automatically tear down dialup IPSec sessions that have gone idle, freeing resources tied up by inactive remote-access users. For example, an admin managing a pool of dialup VPN users might set this to 1800 seconds so idle sessions disconnect after 30 minutes rather than holding a slot indefinitely.