The present document specifies the Q3 interface between an Local Exchange (LE) and the Telecommunications
Management Network (TMN) for the support of line and circuit test functions for analogue and ISDN lines which are
connected directly to a LE.
The focus of the present document is on defining an object model based on the existing standards ETS 300 378-1 [3]
and ITU-T Recommendation X.745 [20]. The add-ons, modifications and restrictions to these standards are specified
which are necessary to adapt the object model to a LE. Existing protocols are used where possible. The definition of
Operations System (OS) functionality is outside the scope of the present document.