Redundant time-of-day oscillators are aligned, within a master oscillator path, to local logic oscillator and used to create independent step-sync signals. The unshielded cable comprises at least one wire pair and the discrete protection device comprises a voltage suppressor device coupled between the wires of each wire pair. The obtained polyalkylene arylate-series resin composition shows high flame-retardancy. The luminescent layer receives light emitted by the light emitter. Further, the color filter produced from the transparent coloring composition can be suitably used as color filters for color liquid crystal displays or the like owing to the excellent spectral properties.