A.1; B.5; C.16; D.24;
A.光連接不良使接收光功率過低; B.光纖盤上的光纖被燒壞; C.光接收模塊或者對(duì)端光發(fā)送模塊損; D.網(wǎng)管上未對(duì)該光口配置時(shí)隙;
A.1230 B.1700 C.2000 D.1550