| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YD/T 1150-2001 | English | 939 |
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Days<=6
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The technical specification for intelligent public telephone service
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YD/T 1150-2001
| Valid |
YD/T 1150-2001
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