OPTICAL NODE APPARATUS, METHOD FOR CHECKING CONNECTION IN NODE APPARATUS AND PROGRAM THEREOF

摘要

An optical node apparatus whose plural function units are connected each other through an optical transmission line includes a control unit which carries out control to send an optical test signal and to stop sending the optical test signal a sending unit which sends the optical test signal on the basis of an instruction issued by the control unit a receiving unit which receives the optical test signal sent by the sending unit through the optical transmission line and a discriminating unit which discriminates whether the receiving unit receives the optical test signal.