A.2Mb/s B.8Mb/s C.140Mb/s D.2.5Gb/s
A.STM-1 B.STM-2 C.STM-3 D.STM-4
A.儀表接收口連接設(shè)備發(fā)端的連線有問(wèn)題 B.儀表發(fā)口連接設(shè)備收口的連線有問(wèn)題 C.A和B兩者都可能 D.前面3個(gè)答案都不對(duì)