问题描述:
[单选]
G-AIS告警是指()?G-AIS alarm refers to().
A.客户侧信号失效; the client-side signal fails;
B.线路侧信号失效; the line-side signal fails;
C.GE业务信号才会上报; only the GE service signals being reported
D.服务层信号失效; the service-layer signal fails;
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答案解析:无
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