A system and method for providing dynamically generated information to a caller during the ringing state of a telephone call. The amino acid extension includes an amino acid sequence X1-Gly-X2, where X1 and X2 are selected from Gly and Cys, where at least one of X1 or X2 is Cys. The first position sensor detects a first position indicating a position in the stacked direction of one end portion of a topmost sheet stacked in the sheet-accommodating tray. The network wireless LAN interface may be coupled to the cryptographic processor, and it may be switchable between wireless LAN modes. Further, the plastic photonic crystal fiber of the present invention can be used as a preform from which a plastic photonic crystal fiber for an optical communication can be drawn. A fuel produced by such a method is also provided.