| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 15409-1994 | English | 279 |
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Days<=3
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Frame structure for synchronous digital hierarchy signal
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GB/T 15409-1994
| Obsolete |
GB/T 15409-1994
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