| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YDN 046-1997 | English | 479 |
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Technical Requirements for Automatic Accounting System of Telephone of Centralized Charging and Management Type (Tentative Specifications)
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YDN 046-1997
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YDN 046-1997
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