The present invention relates to a method and apparatus for inter-domain mobility management for a telephony network. It is possible to provide aqueous coating compositions exhibiting both satisfactory coating manageability and finished appearance. Then, the methods and devices can automatically determine the closest match between: the print job color gamut; and the base color gamut or one of the extension color gamuts to identify a matching color gamut. In the process, the decrease and increase in the volume is carried out using various time constants, and disturbing control oscillations are neutralized by inserting a counter which must be decremented prior to a raising of the volume. In an associated method, this shape of the handle assembly facilitates maintaining the sheath in a stationary position during insertion and removal of instrumentation. It discloses several aspects of the light pipe element aimed at improving the illumination of the targeted area for the aforementioned purpose, including the shape of the light pipe ends, the use of a refracting coat on the back of the light pipe and the shaping of the light pipe front surface to focus the light rays on the target surface.