A reference to MIB definitions specific to the
particular media being used to realize the module.
It is recommended that this value point to an instance
of a MIB object in the media-specific MIB, i.e., that
this object have the semantics associated with the
InstancePointer textual convention defined in RFC
1903. In fact, it is recommended that the module-
specific MIB specify what value moduleSpecific should/can
take for values of moduleType. If no MIB definitions
specific to the particular media are available, the
value should be set to the OBJECT IDENTIFIER { 0 0 }.