| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YD/T 1640-2007 | English | 319 |
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Days<=3
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Technical Specification for Softswitch and Digital Trunking Mobile Communication System Inter-working between Networks
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YD/T 1640-2007
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YD/T 1640-2007
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