Signal transmission method and apparatus, and signal transmission system

摘要

The present invention relates to an apparatus/system and a method for optical fiber two-way communication, which make it possible to make highly reliable transmission at all times and to carry out communication at a high transmission speed when an optical fiber or a combination of optical fibers not assumed is used, as long as the optical fiber or the optical fibers are connected in a state allowing communication in principle, the method including the steps of transmitting a signal of a predetermined pattern corresponding to each of a plurality of different signal transmission speeds from the signal transmitter of a first terminal to the signal receiver of a second other opposite terminal; comparing the signal received by the signal receiver of the second terminal with a signal of the predetermined pattern; and detecting a signal transmission speed enabling transmission and reception on the basis of a signal position where the signal received by the signal receiver of the second terminal and the signal of the predetermined pattern do not coincide with each other.