Recently, in the system that is used to observe multiole points with video transmission, the system is hoped that observe a point by arranging portable terminal on flexible term. Because the conventional system is used to arrange fixed terminal. Therefore, we developed information free access system thatis enable to change the observation point where the portable terminal connects with optioal tap arranged along transmission link. Number of optioal taps which is possible to transmit is dominated by transmission loss. Acoording to caloulated results, it is feasible to arrange 30 optical tap along 30km optical transmission link.
