[单选题]

LOCAL-BUS的错误描述是()

A . LOCAL-BUS-A用于主架,LOCAL-BUS-B用于E架

B . 621型机架的C5、C6为LOCAL-BUS的扩展接口,不用时要终止

C . 1024型机架只有C5接口,说明C5接口是LOCAL-BUS-B的接口

D . LOCAL-BUS是一对时分总线,每个TRU单元只占用其中3个TS

参考答案与解析:

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