This object contains a code which contains more specific
information on the test result, for example an error-code
after a failed test. Error codes and other values this
object may take are specific to the type of interface and/or
test. The value may have the semantics of either the
AutonomousType or InstancePointer textual conventions as
defined in RFC 2579. The identifier:
testCodeUnknown OBJECT IDENTIFIER ::= { 0 0 }
is defined for use if no additional result code is
available.