A.100M B.155M C.622M D.1000M
A.光纖收發(fā)器 B.PDH C.SDH D.協(xié)轉(zhuǎn)
A.光口有數(shù)據(jù)傳輸 B.鏈路數(shù)據(jù)傳輸沖突 C.電口有數(shù)據(jù)傳輸 D.設(shè)備運(yùn)行正常