高速数字用户线HDSL ？
甚高速数字用户线（VDSL）是数字用户线（DSL）家族中速率最高的接入方式。
Very-high-speed digital subscriber line(VDSL) is the fastest access technology of the xDSL family.
高比特率数字用户线（HDSL）是对在现有铜线对上进行高速、短距离通信的重大突破。
HDSL represents a major breakthrough in loop circuits of limited distance, capcable of high speed transmission on copper facilities.
高比特率数字用户线（HDSL）是对在现有铜线对上进行高速、短距离通信的重大突破。
HDSL represents a major breakthrough in loop circuits of limited distance, capcable of high speed transmission on copper facilities.
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