| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| SJ 2812-1987 | English | 399 |
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Days<=3
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(Long-distance telephone switching equipment artificial technical requirements)
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SJ 2812-1987
| Obsolete |
SJ 2812-1987
|