高比特数字用户环路(HDSL)技术是一种新的在双绞铜线上实现高速数据传输技术，有“铜光纤”之称。
HDSL is a new high-speed data transport technology realized over twisted-pair wires and is known as "copper optical fiber."
在此前提下，采用高速数据传输技术成为必然，DMA(直接存储器访问)技术就是较理想的解决方案之一，能够满足信息处理实时性和准确性的要求。
DMA (Direct Memory Access) technology is one of the best solutions which could meet the requirements of real-time and accuracy for information processing.
这种基于光学基础的高速数据传输的通讯技术是最近几年重要的进步。
The push for higher data rates in light-based telecommunications technologies has seen a number of significant leaps in recent years.
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