3.1.2.11 SendSymmetricKeyCache Cleanup Timer

This timer regulates the amount of time that the protocol waits before removing expired entries from the SendSymmetricKeyCache ADM element. This timer is set either when a CachedSymmetricKey (section 3.1.1.3.3) ADM element instance is added to the SendSymmetricKeyCache ADM element, as specified in section 3.1.7.1.5, or by the SendSymmetricKeyCache Cleanup Timer Event (section 3.1.6.11).