A.2Mkbit/s B.16Kbit/s C.13Kbit/s D.64Kbit/s
A.主副柜組間只有時鐘線相連 B.主副機柜間有數(shù)據(jù)線和時鐘線相連 C.主副柜組、主副機柜需要設置撥碼開關 D.主副柜組、主副機柜不需要設置撥碼開關
A.850nm B.1310nm C.1450nm