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주흥노,정진우,김홍만,박문수,이상호,강민호,박의신,Ju, Heung-No,Jeong, Jin-U,Kim, Hong-Man,Park, Mun-Su,Lee, Sang-Ho,Gang, Min-Ho,Park, Ui-Sin 한국전자통신연구원 1984 전자통신 Vol.6 No.2
First commercial optical fiber communication system has been installed between Guro (Seoul) and Gansuk (Inoheon). The total route length is 35km. The system operates at $0.85\mum$. It contains 3 repeaters and the repeater spacing is about 9 km. The operating system parameters meet their design objectives.