... voice-grade channel 话音级信道 voice-grade data 话音级数据 voice-over-DSL (VoDSL) 数字用户线上传输话音，DSL电话 ...
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voice grade data 话音级数据
A data channel on which the information transmitted can take any value between the limits defined by the channel. Voice - grade channels are analog channels.
一种数据信道，其传输的信息可取该信道规定界限内的任何值。话音信道就是模拟信道。
In a telephone system, a term applied to any non data transmission that makes use of voice grade lines.
在电话系统中的一种术语。适用于利用音频段线路的任何非数据传输业务。
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