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单项选择题On an ONS 15454 node you can tunnel an ().

A、SDH circuit over a SONET network delivering it as an SDH signal

B、SDH circuit over a SONET network delivering it as a SONET signal

C、SONET circuit over an SDH network delivering it as an SDH signal

D、SONET circuit over an SDH network delivering it as a SONET signal

  • A
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