<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><font face="Times New Roman">568A</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">和</span><span lang="EN-US"><font face="Times New Roman">568B</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">的区别:后者是前者的升级和完善,包含永久链路的定义和六类标准。另外在同一综合布线的施工中,只能使用一种打线方式。</span><span lang="EN-US"><font face="Times New Roman">568B</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">使用差分的传输方式,其原理就是为了实现发送端在两条信号线上传输幅值相等相位相反的电信号,接收端对接受的两条线信号作减法运算,这样获得幅值翻倍的信号。</span></p> |