Abstract: A method is disclosed for testing optical fiber connection quality of an optical drop fiber between a telecommunications system and a subscriber connection box in a multi-dwelling unit or other subscriber premises before connection to other subscriber equipment. An end of the optical fiber to be tested is placed in a fiber-holding device, which holds the fiber end in alignment with a suitable reflective body. An optical signal is provided from the system direction which is reflected by the reflective body back towards the system. The reflected signal is detected by a suitable instrument, preferably an optical time domain reflectometer (OTDR), to confirm acceptable signaling quality of the optical path between the system and the fiber end.

Abstract: A method according to one embodiment of the invention relates to determining at least one parameter of a model that provides information about a position of an object. The object has a plurality of alignment marks of which desired positions are known. The method includes measuring a plurality of positional parameters for each alignment mark. Based on the measured plurality of positional parameters, which are weighted with weighing coefficients, at least one parameter of the model of the object is determined. The numerical value of each weighing coefficient is determined together with the at least one parameter of the model.

Abstract: A method according to one embodiment of the invention relates to determining at least one parameter of a model that provides information about a position of an object. The object may include a plurality of alignment marks of which desired positions are known. The method includes measuring a plurality of positional parameters for each alignment mark. Based on the measured plurality of positional parameters, which are weighted with weighing coefficients, at least one parameter of the model of the object is determined. The numerical value of each weighing coefficient is determined together with the at least one parameter of the model.

Abstract: Method for testing optical fibre connection quality of an optical drop fibre between a telecommunications system and a subscriber connection box in a multi-dwelling unit or other subscriber premises before connection to other subscriber equipment comprises placing the end of the optical fibre to be tested in a fibre-holding device, which holds the fibre end in alignment with a suitable reflective body; providing an optical signal from the system direction which is reflected by the said reflective body back towards the system; and detecting the reflected signal by a suitable instrument, preferably an optical time domain reflectometer (OTDR), to confirm acceptable signalling quality of the optical path between the system and the fibre end.