多项选择题
he ZXWM M900 system transmits network management information using specified monitoring channel at a rate of().
A.2 Mbit/s B.10 Mbit/s C.100 Mbit/s D.1000 Mbit/s
多项选择题 Select boards allowing optical protection from the following options. ()
单项选择题 下面那种技术可改善接收机误判率()
问答题 简述EDFA在应用中的注意事项?