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sdh接口類型有哪幾種？

標準的SDH接口應該是STM-1(155.520Mbit/s)、STM-4(622Mbit/s)、STM-16(2.5Gbit/s)、STM-64(10Gbit/s)、STM-256(40Gbit/s) SDH設備的支路可以承載PDH的信號，常見的如1.5M、2M、45M、139M等。 MSTP(多業務傳送平臺)嚴格意義上來說也是SDH設備，除了具備以上業務接口類型之…

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