MIB: ENTITY-MIB
The name of the manufacturer of this physical component.
The preferred value is the manufacturer name string actually
printed on the component itself (if present).
Note that comparisons between instances of the
entPhysicalModelName, entPhysicalFirmwareRev,
entPhysicalSoftwareRev, and the entPhysicalSerialNum
objects, are only meaningful amongst entPhysicalEntries with
the same value of entPhysicalMfgName.
If the manufacturer name string associated with the physical
component is unknown to the agent, then this object will
contain a zero-length string.