Abstract: A light emitting device module including a substrate including a plurality of light emitting areas, light emitting devices disposed in each light emitting area and to emit light, windows disposed on the substrate, each of the windows covering one of the light emitting areas and having an asymmetrical shape with respect to one direction, and a holder for coupling the windows, the holder including a plurality of openings each having an asymmetrical shape, in which each of the windows is individually disposed in a corresponding one of the openings and is detachably coupled to the holder.

Abstract: A light emitting device module including a substrate including a plurality of light emitting areas, light emitting devices disposed in each light emitting area and to emit light, windows disposed on the substrate, each of the windows covering one of the light emitting areas and having an asymmetrical shape with respect to one direction, and a holder for coupling the windows, the holder including a plurality of openings each having an asymmetrical shape, in which each of the windows is individually disposed in a corresponding one of the openings and is detachably coupled to the holder.

Abstract: A method and apparatus to establish independence between nodes in a distributed network during protection switching. A translation module that may include a cross connect table is introduced onto a backplane of a line card between a switch fabric and an egress time slot interchange (ETSI) module. Logical identifiers are assigned to the inputs of the ETSI module during system initialization. After initialization, the logical identifiers remain fixed. The translation module maps physical identifiers for incoming signals to the logical identifiers. If a line outage occurs, the translation module remaps the physical identifier for the protection line to the logical identifier corresponding to the failed line.