The present document specifies the Q3 interface between an Access Network (AN) and the Telecommunications Management Network (TMN) for the support of fault and performance management functions for V5 interfaces, as described in EN 300 324-1 [4] and EN 300 347-1 [5], and their associated user ports. The management of transmission,
media and services which are not related to V5 interfaces is outside the scope of the present document. The present document includes the testing of the lines and line circuits at the user ports associated with the V5 interface, and the logging of faults and related functions. Messages on the V5 interface associated with errors or other faults which are handled by local management (e.g. the non-deferred link blocking request) or which involve implementation specific issues (e.g. faults which may result in the connection incomplete information element being used in the Bearer Channel
Connection (BCC) protocol) are outside the scope of the present document. The location of the Q3 interface to which the present document refers is specified in EN 300 376-1 [6]. The present document does not constrain the logical or physical size of the AN or its geographical dispersion. Existing protocols are used where possible, and the focus of the present document is on defining the object models. The definition of Operations System (OS) functionality is outside the scope of the present document.