The present document specifies the management interfaces (Q3 interfaces) associated with the VB5.1 reference point [1]@ [2] and EN 301 217-1 (see bibliography) for the support of configuration@ fault performance management functions. Fault and performance management together include both passive monitoring of reports and active fault isolation. The Q3 interface [9] is the TMN interface between network elements or Q-adapters which interface to OSs without mediation and between OSs and mediation devices. Existing protocols are used where possible@ and the focus of the work is on defining the object model. The definition of the functionality of TMN Operations Systems is outside the scope of the present document. ITU-T Recommendation Q.2931 [11] is supported at the UNI@ and the ATM Forum UNI is supported for compatibility with the established base of ATM equipment.