The value of tApsAnnexBCommandSwitch specifies the Annex B supported
APS switch command applied to the APS group.
The supported values:
'noCmd(1)' -- no command was applied to the group since system
-- initialization.
'lockout(2)' -- lockout the APS group.
'clearLockout(3)' -- clear the lockout.
Sets to value 'lockout(2)' or 'clearLockout(3)' will be rejected with
error inconsistentValue if APS-MIB::apsConfigMode is not equal to
'onePlusOneOptimized(4)'. If 'noCmd(1)' is used in a write operation
a wrongValue error is returned.
When read this object returns the last command written or 'noCmd(1)'.