A fiber wrap and a method of rotating the fiber wrap without twisting a data cable are disclosed. The wiring is disposed in an overlap region overlapping with the recess or the projection in the insulating layer in a thickness direction, in the gap region, and the second electrode layers in the light emitting elements neighboring in the second direction are separated from each other by the recess or the projection in the insulating layer. The printing mode is either an envelope printing mode or a tapelabel printing mode. A second stage is programmable to process a second set of overhead bytes in the stream of SONET frames.