This Recommendation | International Standard provides the specification of management information within an Open System related to those operations of the OSI Physical Layer specified by the specifications in this Recommendation | International Standard. Specifics on how Physical Layer management is accomplished is beyond the scope of this Recommendation | International Standard. Physical Layer management is defined by specifying: — the managed object class definition of Physical Layer Managed Objects following guidelines put forth by the Structure of Management Information (see ITU-T Recs. X.720 | ISO/IEC 10165-1 to X.723 | ISO/IEC 10165-5; — the relationship of the Managed Objects and attributes to both the operation of the layer and to other objects and attributes of the layer; and — the action type operations on the attributes of Physical Layer Managed Objects that are available to OSI Systems Management.