3 语音质量测试（Voice Quality Test ） IAD产品采用T/P二线接口，也就是我们常见的联接电话机到电信局的电话线接口。
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voice quality test
话音质量测试
以上为机器翻译结果，长、整句建议使用 人工翻译 。
At the same time, the paper also introduces call completion rate, call maintenance time, voice quality and some other test content about driver.
并分别对呼通率，呼叫保持时间，语音质量和与驱动相关的功能指标进行了说明。
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During the test, Bigelow found no difference between the voice quality on the DSL lines and those on a regular analog phone.
CNN: Voice over DSL trial passes muster
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