This attribute is the type of test to be run. The four types of tests
available are: the port hardware logic test, the configure and dump
memory registers test, the memory mapping test and the Time
Domain Reflectometry (TDR) test.
The possible values of this attribute are:
hardwareLogic: this test checks the port hardware controller for
logic errors in some of the on-chip counters and shift registers.
configuration: this test configures the memory registers of the
hardware controller in a predetermined way and then dumps the
registers and checks their contents for errors.
memoryMap: this test does an extensive test of the memory
structures used by the OAM Ethernet port to verify that they are
configured correctly and are error-free.
tdr: this test is used to detect and locate cable faults caused by either
a short or an open circuit on the coaxial cable.