This sets the login inactivity timeout, in the device's time units, after which an idle outbound SSH session is automatically closed, within a range of 1 to 160, defaulting to 5. An admin adjusts this to balance convenience against security, since a shorter timeout closes forgotten idle sessions faster while a longer one avoids disconnecting a session mid-task. For example, setting this OID to 30 would cause an outbound SSH session with no activity for 30 units of time to be automatically terminated.