单项选择题
我国采用的光同步数字速率等级是()。
A.2Mb/s,8Mb/s,34Mb/s,140Mb/s
B.1.5Mb/s,6.3Mb/s,45Mb/s,274Mb/s
C.155Mb/s,622Mb/s,2.5Gb/s,10Gb/s
D.52Mb/s,155Mb/s,466Gb/s,622Mb/s……10Gb/s
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单项选择题
A.2Mb/s,8Mb/s,34Mb/s,140Mb/s
B.1.5Mb/s,6.3Mb/s,45Mb/s,274Mb/s
C.155Mb/s,622Mb/s,2.5Gb/s,10Gb/s
D.52Mb/s,155Mb/s,466Gb/s,622Mb/s……10Gb/s
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