SIGNAL TRANSMISSION METHOD AND APPARATUS, AND SIGNAL TRANSMISSION SYSTEM

摘要

PROBLEM TO BE SOLVED: To attain transmission with high reliability without fail and communication at a high transmission rate so long as an optical fiber is connected in a communication enabled way as principles when the optical fiber or its combination not considered as the design stage is employed. SOLUTION: A transmitter 22 of a terminal 21 transmits a transmission signal with an existing pattern respectively corresponding to a plurality of different signal transmission rates to a receiver 26 of a terminal 25, the receiver 26 compares the signal with the signal of the existing pattern, detects a signal transmission rate V1 on the basis of a position of the signal when the signal received by the receiver 26 of the terminal 25 is not coincident with the signal with the existing pattern, similarly the transmitter 27 of the terminal 25 and the receiver 23 of the terminal 21 detect a signal transmission rate V2 and the transmitter 27 uses the signal transmission rate which is slower in the both to conduct communication.