[推荐]使用双绞线介质的优势！...

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<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">近几年来，在安防的销售市场上又增添了一位新的传输伙伴——双绞线。</span> <span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">双绞线最初是用于电话语音传输，然后用于传输网路，最后人们把它用来传输视频，不仅传输距离远，而且图像清晰，收到意想不到的效果。</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">那什么是双绞线？它分为两类：</span><span lang="EN-US" style="FONT-FAMILY: ">STP</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">（屏蔽双绞线）</span><span lang="EN-US" style="FONT-FAMILY: ">UTP</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">（非屏蔽双绞线）：现在最常用的是五类或超五类的非屏蔽双绞线。是由两根相互绝缘的铜导线按照一定的扭距相互缠绕而成。一般有两对四芯，四对八芯等等。（如下图示）</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><font style="FONT-SIZE: 13px; FONT-FAMILY: 宋体"><img style="FONT-FAMILY: " src="http://www.utpvideo.com/manageweb/webedit/uploadfile/20090302111619603.jpg" border="0"/><img style="FONT-FAMILY: " src="http://www.utpvideo.com/manageweb/webedit/uploadfile/20090302111632400.jpg" border="0"/></font></span></p><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span style="FONT-FAMILY: ; mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">面对激烈的市场竞争，同轴线似乎占据了安防市场的主导地位。而新型的传输介质——光纤光缆也在一点一点的占据市场。同轴线在主线芯的外面包裹了一层聚氯乙烯的绝缘材料，铝箔和金属屏蔽网线，这样可以阻隔外界环境的干扰，提高通讯质量。但是它的缺点也是显而易见的：</span><span lang="EN-US" style="FONT-FAMILY: ">1</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）、一根同轴线只能传输一路视频信号。</span><span lang="EN-US" style="FONT-FAMILY: ">2</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）、体积大，占用弱电井管道的大量空间。</span><span lang="EN-US" style="FONT-FAMILY: ">3</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）、不能够承受缠结、压力和严重弯曲，会损坏电缆结构，阻止信号传输。（如下图示）</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><font style="FONT-SIZE: 13px; FONT-FAMILY: 宋体"><img style="FONT-FAMILY: " src="http://www.utpvideo.com/manageweb/webedit/uploadfile/20090302111717592.jpg" border="0"/><img style="FONT-FAMILY: " src="http://www.utpvideo.com/manageweb/webedit/uploadfile/20090302111733188.jpg" border="0"/></font></span></p><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span style="COLOR: black; FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">而光纤光缆作为新型的传输介质，</span><span style="COLOR: black; FONT-FAMILY: ; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: Arial">是一条玻璃或塑胶纤维，在使用前必须由几层保护结构包覆，方可使用。它</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">无论是在安全性、可靠性、还是在网路性能等方面都大大的超出了同轴线和双绞线。它的最大传输距离可以达到百公里以上，是组建大规模网路的必然选择。郑因为光纤光缆具有抗干扰性能好、保密性强、速度快、传输容量大等优点，所以价格非常昂贵，工程投入成本高，需要有专业人士进行安装、操作与维护。（如下图示）</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><font style="FONT-SIZE: 13px; FONT-FAMILY: 宋体"><img style="FONT-FAMILY: " src="http://www.utpvideo.com/manageweb/webedit/uploadfile/20090302111759243.jpg" border="0"/><img style="FONT-FAMILY: " src="http://www.utpvideo.com/manageweb/webedit/uploadfile/20090302111819177.jpg" border="0"/></font></span></p><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><strong><font style="FONT-SIZE: 13px; FONT-FAMILY: 宋体">通过以上三者的比较，我们可以看出双绞线具有一些无可比拟的优点：</font></strong></span></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span lang="EN-US" style="FONT-FAMILY: ">1</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）传输距离远，传输质量高；</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span lang="EN-US" style="FONT-FAMILY: ">2</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）一根双绞线可以同时传输多路视频信号；（相对同轴线而言）</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span lang="EN-US" style="FONT-FAMILY: ">3)&nbsp;</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">抗干扰性能强，可靠性高；（可将串扰减至最小或加以消除）</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span lang="EN-US" style="FONT-FAMILY: ">4</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）没有屏蔽外套，直径小，节省占用的空间；</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span lang="EN-US" style="FONT-FAMILY: ">5</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）重量轻、易弯曲、安装简单方便，不易燃烧；</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span lang="EN-US" style="FONT-FAMILY: ">6</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）布线方便，线缆利用率高；</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span lang="EN-US" style="FONT-FAMILY: ">7</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）具有独立性和灵活性；</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><font style="FONT-FAMILY: 宋体"><font style="FONT-SIZE: 13px"><span lang="EN-US" style="FONT-FAMILY: ">8</span><span style="FONT-FAMILY: ; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">）价格便宜，取材方便；</span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt"><span lang="EN-US"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p><font style="FONT-SIZE: 13px; FONT-FAMILY: 宋体">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'"><font style="FONT-SIZE: 13px; FONT-FAMILY: 宋体">在市场经济多元化的今天，安防行业是一个朝气蓬勃的行业，尤其是在应对世界经济危机的情况下，寻求一种经济，<strong style="FONT-FAMILY: "><font color="#ff0033">传输距离远，传输质量高</font></strong>的解决方案是十分必要的。</font></span></p>
<p class="MsoNormal" style="MARGIN: 0cm="0cm"  0cm="0cm"  0pt; TEXT-INDENT: 21.75pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"  Roman'; mso-hansi-font-family: 'Times New="New"  Roman'">****深圳市优特普科技有限公司</span></span></span></span>&nbsp;</p>
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<strong>学习了！！！谢谢！！！</strong>

我用过一次，传输距离大约七、八百米，图像质量还可以，但是不是很清晰，我调试了好长时间，图像质量也没有提高，总体来说还可以

看到此文非常高兴 正准备使用双交线做视频监控线

<p>这个可以与网路通讯线缆一起上，还能减少采购成本</p>