| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YD/T 3591-2019 | English | 599 |
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Days<=5
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(Technical requirements and detection method for charging performance of LTE-based voice service (VoLTE) charging system)
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YD/T 3591-2019
| Valid |
YD/T 3591-2019
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