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單項(xiàng)選擇題

OC-12/STM-4線路每秒能傳輸多少ATM信元（）

A.1418264
B.353208
C.80000
D.96000

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單項(xiàng)選擇題

E-1線路使用哪種線碼類型（）

A.B8ZS
B.HDB3
C.B3ZS
D.CMI

單項(xiàng)選擇題

數(shù)字信道的誤碼率一般在（）以下

A.10^-6
B.10^-7
C.10^-8
D.10^-9

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