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\u901a\u4fe1\u767e\u79d1<\/p>\n\n\n\n

01.\u4ec0\u9ebc\u662fSDH\uff1f
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\u5728\u901a\u8a0a\u9818\u57df\u88e1SDH\uff08\u540c\u6b65\u6578\u4f4d\u9ad4\u7cfb Synchronous Digital Hierarchy\uff09\u662f\u4e00\u9762\u65d7\u5e5f\uff0c\u4ed6\u5b8c\u5584\u4e86\u65e9\u671fPDH\uff08\u6700\u65e9\u7684\u5149\u7aef\u6a5f\uff09\u7684\u8af8\u591a\u4e0d\u8db3\uff0c\u628a\u6642\u9418\u5f9e\u300c\u6e96\u540c\u6b65\u300d\u8b8a\u6210\u4e86\u300c\u540c\u6b65\u300d\u3002
PDH\u7684\u5149\u50b3\u8f38<\/a>\u53ea\u80fd\u662f\u9ede\u5c0d\u9ede\uff0c\u9023\u7e8c\u80cc\u9760\u80cc\u50b3\u8f38\u5bb9\u6613\u51fa\u73fe\u6642\u9418\u4e0d\u540c\u6b65\uff08PDH\u5728\u9ede\u5c0d\u9ede\u7684\u60c5\u6cc1\u4e0b\u662f\u6709\u6642\u9418\u7684\uff09\uff0c\u800c\u4e14\u5728\u5e02\u5834\u884c\u696d\u5167\u6a19\u6e96\u4e0d\u7d71\u4e00\u3002
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\"\"<\/figure>\n\n\n\n

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02.\u4ec0\u9ebc\u662fMSTP\uff1f
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\"\"<\/figure>\n\n\n\n

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\"\"<\/figure>\n\n\n\n

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\"\"<\/figure>\n\n\n\n

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    \"\"<\/figure>\n\n\n\n

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    \"\"<\/figure>\n\n\n\n

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    \"\"<\/figure>\n\n\n\n

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