... gain-switching system 增益开关系统 Pair-Gain System 电话线路倍增系统 direct gain system 采暖方式 ...
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Pair Gain System 线对增容系统
digital pair-gain system 数字线对增益系统
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SHDSL technology chips, this paper presents a design of 12 times pair gain system as far as 6.7 kms distance, which helps to solve the lack of voice service in the countryside or the mountain area.
SHDSL芯片，实现解决偏远地区、山区等用户线路最高达6.7公里内12倍增语音、传真业务线路倍增扩容设计方案。
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