Voice quality is bad due to high delay and jitter on a link. Which two actions will improve the quality of voice calls？（）
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Diurnal aberration is due to（）.
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如果看到Voice quality models initialization failed消息，有那几步的解决方案？
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听力原文：M: Slly sid she couldn’t her word. Cn you turn up the volume F: Sorry, but听力原文：M: Slly sid she couldn’t her word. Cn you turn up the volume F: Sorry, but I Cn’t. This is the loudest volume I cn do with this recorder. Wht is wrong with the recorder The voice is too wek. B．The sound is too loud. C．The volume is out of order.