A.OWDM B.OCDM C.OFDM D.OTDM
A、-ATM或IP B、ATM或GEM C、GEM或IP
A.1s亮/1s灭闪烁 B.0.1s亮/1.9s灭闪烁 C.1.9s亮/0.1s灭闪烁 D.0.25s亮/0.25s灭闪烁
A、铜 B、石英 C、碳 D、塑料