Which three timing modes are supported on the ONS 15454 shelf？ （）
- A、 line timing
- B、 loop timing
- C、 internal timing
- D、 through timing
- E、 external timing
正确答案:A,C,E
答案解析:有
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思科认证考试
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Which three timing modes are supported on the ONS 15454 shelf？ （）
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