YD T 4552.2-2024 5G终端基于NR的语音解决方案（VoNR）测试方法 第2部分：协议一致性测试.pdf

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YD T 4552.1-2023 5G终端基于NR的语音解决方案（VoNR）测试方法 第1部分：功能和性能测试.pdf

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