3.1.2.1 Idle Timer

There is an instance of the Idle Timer corresponding to each Session object. This timer MUST be set when both the Incoming Connection Table and the Outgoing Connection Table are empty, and it MUST be canceled when a Connection object (section 3.1.1.1) is added to either the Incoming Connection Table or the Outgoing Connection Table. The default value of the timer is specific to the implementation.