网络双绞线认识上的误区...

<p class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center;"><b style="mso-bidi-font-weight: normal;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">网络双绞线认识上的误区</span><span lang="EN-US"><p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><a href="http://www.shhuihai.com"><span lang="EN-US"><font face="Times New Roman">FGT</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">综合布线</span><span lang="EN-US"><font face="Times New Roman">/</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">许志华</span></a></p><p class="MsoNormal" style="MARGIN: 12pt 0cm 0pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman">&nbsp;&nbsp;&nbsp; </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">做综合布线很多年了</span><span lang="EN-US"><font face="Times New Roman">,</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">经常会碰到很多朋友和客户问，你们的网线线径是多少。是</span><span lang="EN-US"><font face="Times New Roman">0.5</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">还是</span><span lang="EN-US"><font face="Times New Roman">0.48</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">，还有</span><span lang="EN-US"><font face="Times New Roman">0.485/0.49/0.51</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">等等，各种各样的问法，对于这种认识上的误区，我觉得有必要进行一些更正。让大家更清楚明白网络双绞线到底是怎么一回事。</span></p><p class="MsoNormal" style="MARGIN: 12pt 0cm 0pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman">&nbsp;&nbsp; </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">网络双绞线主要是用于电脑信号传输的一种介质，网络双绞线的质量好坏，直接决定网络信号传输的稳定性能。质量好的网络双绞线，</span><font face="Times New Roman">
                </font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">传输的信号就稳定，不丢包等。如何区别网络的质量好坏。只有一种方法就是：</span></p><p class="MsoNormal" style="MARGIN: 12pt 0cm 0pt 16.5pt;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">用</span><span lang="EN-US"><font face="Times New Roman">FLUKE</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">测试仪测试：</span></p><p class="MsoNormal" style="MARGIN: 12pt 0cm 0pt 16.5pt; TEXT-INDENT: 21pt; mso-para-margin-top: 12.0pt; mso-para-margin-right: 0cm; mso-para-margin-bottom: .0001pt; mso-para-margin-left: 1.57gd; mso-char-indent-count: 2.0;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">目前</span><span lang="EN-US"><font face="Times New Roman">FLUKE</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">测试仪能够测试双绞线五类，超五类，六类等。如</span><span lang="EN-US"><font face="Times New Roman">FLUKE 4100</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">、</span><span lang="EN-US"><font face="Times New Roman">4300</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">，</span><span lang="EN-US"><font face="Times New Roman">FLUKE DTX-LT</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">、</span><span lang="EN-US"><font face="Times New Roman">DTX-1200</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">、</span><span lang="EN-US"><font face="Times New Roman">DTX-1800</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">等型号，都可以测试双绞线的质量性能，一般现在国家质量检测机构也常用这种方法测试双绞线与模块，配线架的整体链路性能。还有信道性能。链路测试是用专用的链路测试头，</span><span lang="EN-US"><font face="Times New Roman">90</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米网络双绞线各打在配线架和模块上面，直接用专用链路头测试，另一种是信道测试，信道测试是指用</span><span lang="EN-US"><font face="Times New Roman">90</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米双绞线各打在配线架和模块上，然后通过网络跳线进行测试，加起来不能超过</span><span lang="EN-US"><font face="Times New Roman">100</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米。按照</span><span lang="EN-US"><font face="Times New Roman">586A/B</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">的标准，网络双绞线传输为</span><span lang="EN-US"><font face="Times New Roman">90</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米，或总长</span><span lang="EN-US"><font face="Times New Roman">100</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米，超过这个距离就不在标准范围，这也就是有些人常说</span><span lang="EN-US"><font face="Times New Roman">50</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米能不能通过测试，</span><span lang="EN-US"><font face="Times New Roman">120</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米能不能通过测试的一种解释。</span><span lang="EN-US"><font face="Times New Roman">100</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米之内必须通过测试，超过</span><span lang="EN-US"><font face="Times New Roman">100</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米也许能够使用，但就达不到标准。不属于网络双绞线的质量要求范围了。</span></p><p class="MsoNormal" style="MARGIN: 12pt 0cm 0pt 16.5pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman">&nbsp;&nbsp;&nbsp; </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">关于线径的说法误区，线径并不代理越粗越好，也不代表越细越好，目前市场上有很多种双绞线，价格和各种档次，这里有品牌的原因，也有产品质量的问题。比如，市场上一箱</span><span lang="EN-US"><font face="Times New Roman">200</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">左右的双绞线，有几种原因为产生这个价格，一种是因为这个双绞线没有按一般规范做成</span><span lang="EN-US"><font face="Times New Roman">305</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米</span><span lang="EN-US"><font face="Times New Roman">(1000</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">英尺</span><span lang="EN-US"><font face="Times New Roman">)</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">每箱，如做成</span><span lang="EN-US"><font face="Times New Roman">260</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米或</span><span lang="EN-US"><font face="Times New Roman">280</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">米这样子，还有一种是网络双绞线的铜芯较细，有的是</span><span lang="EN-US"><font face="Times New Roman">0.45</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">左右。这也是客户常说的线径是多粗，另一种就是双绞线的导体，一般市场上有很多种铜，有纯铜，无氧铜，杂铜等乱七八糟的。价格也相差很大。还有外护套，有些是达到</span><span lang="EN-US"><font face="Times New Roman">ROSH</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">标准，有些是用回料生产。用回料生的质量就没有办法保证十年或更多年了。</span></p><p class="MsoNormal" style="MARGIN: 12pt 0cm 0pt 16.5pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman">&nbsp;&nbsp;&nbsp; </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">所以，我们可以肯定的说，即使有些网线能够达到</span><span lang="EN-US"><font face="Times New Roman">0.5</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">，甚至</span><span lang="EN-US"><font face="Times New Roman">0.51</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">的线径，但是由于他们采用杂铜，如铜包铁，铜包铝，还有就是铜不纯，里面含有杂质，所以这种双绞线也是没有办法达到标准，有些铜质量还好，但绞距不好，由于生产工艺的原因，也许一箱双绞线重量比较量，感觉份量挺足，但是由于生产工艺技术不好，实际用</span><span lang="EN-US"><font face="Times New Roman">FLUKE</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">测试仪一测试，根本就不达标。</span></p><p class="MsoNormal" style="MARGIN: 12pt 0cm 0pt 16.5pt;"><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes;">&nbsp;&nbsp; </span>FLUKE</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">测试仪有几个指标非常重要，一种就是</span><span lang="EN-US"><font face="Times New Roman">NEXT</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">指标，余量，常见测试报告的总结上面。另一个就是</span><span lang="EN-US"><font face="Times New Roman">RL</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">，回损，这两种指标常常把很多不合格的双绞线排除在外。</span></p><p class="MsoNormal" style="MARGIN: 12pt 0cm 0pt 16.5pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman">&nbsp;&nbsp; </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">以上是我们公司总结的一点小经验，供大家参考。</span><span lang="EN-US"><font face="Times New Roman">FGT</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">综合布线系统经过了很多次市场的考验，总结出了很多经验，愿意与大家分享。</span><span lang="EN-US"><p></p></span></p>

<p>一般来讲价格和性能是成正比的。想图便宜，就别怕费心~~呵呵</p>

<p>这也就象有篇文章说的,为什么现在电线电缆产品质量合格率为何低位徘徊,恶意的竞争使然啊,</p><p></p><p>市场上一箱<span lang="EN-US"><font face="Times New Roman">200</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'mso-hansi-font-family:';">左右的双绞线.都是这样产生的啊.真不知道这样的线能不能用啊.</span></p>

一分价钱一分货！

是啊 一分价钱一分货

<p>路过，学习</p>

好网线一般比较柔软但比重较大，AMP系列的网线假的太多了

还有一种网线 价格在100---150左右 是4芯铝线4芯铁线 线径0.4左右 电子市场零售的多是这种线 一般50米左右能够联通

一分价钱一分货

涨见识了

<p>不错</p><p></p>

<p>学习中！</p>

谢了，但不全面

还不错，学习了

增长见识了...

<div class="quote"><b>以下是引用<i>GAME</i>在2009-3-5 21:25:00的发言：</b><br/>增长见识了... </div>
<p></p>

学习了

<div class="quote"><b>以下是引用<i>sxtywy001</i>在2009-3-5 16:47:00的发言：</b><br/>谢了，但不全面 </div>
<p>能否再说说呢？</p>

学习了,谢谢...

学习了