<?xml version="1.0" encoding="gbk"?> <rss version="2.0"><channel> <title>定阅帖子更新</title> <link>http://www.broadkey.com.cn/XML.ASP</link><description>TEAM Board - 意得法电子</description> <copyright>TEAM 2.0.5 Release</copyright><generator>TEAM Board by TEAM5.Cn Studio</generator> <ttl>30</ttl><item><link>http://www.broadkey.com.cn/Thread.asp?tid=561 </link><title>光纤网络：EPON</title><author>joy</author><pubDate>2010-07-06 14:33:01</pubDate><description><![CDATA[<table border="0" cellspacing="0" cellpadding="0">
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            <p>&nbsp;</p>
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            <!-- Block Diagram End --><!-- Design Considerations Start -->
            <div class="iecntrestrict"><!-- TeamSite Content Start -->
            <h2 id="Design Considerations" class="larger"><a href="http://focus.ti.com.cn/cn/docs/solution/folders/print/597.html#top" name="&amp;lid=zh_cn_folder_ee_design_considerations_return_anchor"></a>设计注意事项</h2>
            <div style="width: 500px">
            <p>第一英里以太网 (EFM, Ethernet in the First Mile) 也称为 IEEE 802.3ah，是 IEEE 802.3 中定义的一组协议，用于定义接入网络中的以太网，即第一英里或最后一英里。</p>
            <p>在广域网、城域网和局域网已经标准化后，EFM 允许全球范围内的持续标准以太网网络，从而消除了接入网络中的非本地传输，如 ATM 上的以太网。EFM 定义以太网如何通过点对多点 (P2MP) 光纤传输。这些新接口统称为以太网<strong>无源光纤网络 (EPON)</strong>。</p>
            <p><strong>典型内核子系统包括：</strong></p>
            <ul>
                <li><strong>串行器/解串器 (SerDes)：</strong>用于高速全双工点对点数据传输。</li>
                <li><strong>时钟：</strong>为系统提供低抖动时钟信号。</li>
                <li><strong>交叉点交换器：</strong>用于高速网络路由、回路和冗余。</li>
                <li><strong>电源转换：</strong>从主机接口为系统提供电源。</li>
                <li><strong>媒体接入控制器 (MAC)：</strong>专为服务于商业用户和住宅用户的接入网络而设计。</li>
            </ul>
            <p><strong>TI SerDes 器件适用于 EPON/GEPON 应用。</strong> <strong>TLK1221</strong> 千兆以太网收发器用于高速全双工点对点数据传输。此器件以 IEEE 802.3 千兆以太网规范指定的 10 位接口规范的定时要求为基础。TLK1221 支持从 0.6Gbps 至 1.3Gbps 的数据速率。</p>
            <p><strong>TLK2541</strong> 属于数千兆位收发器的 WizardLink 收发器系列，专用于高速双向点对点数据传输系统。TLK2541 支持从 1Gbps 至 1.3Gbps 或 2 至 2.6Gbps 的有效串行接口速度，提供超过 2Gbps 的数据带宽。</p>
            <p>这些器件的主要应用是为 50<font face="symbol">W</font> 受控阻抗媒体上的点对点基带数据传输提供构建块。传输媒体可以是印制电路板线迹、铜线缆或光纤媒体。数据传输的最终速率和距离取决于媒体的衰减特性和环境的噪声耦合。</p>
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            <h2 id="Application Notes" class="larger"><a href="http://focus.ti.com.cn/cn/docs/solution/folders/print/597.html#top" name="&amp;lid=zh_cn_folder_ee_app_notes_return_anchor"></a>应用手册</h2>
            <p>光纤网络：EPON 最新技术文档 <a href="http://focus.ti.com.cn/cn/general/docs/gencontent.tsp?contentId=54911"><img class="helpicon" border="0" alt="Help" src="http://focus.ti.com.cn/graphics/shared//help-ico.gif" /></a></p>
            <div class="srchRsltsList">
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                <li class="abstract"><strong><a href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=scaa099" name="&amp;lid=zh_cn_folder_ee_app_notes_action_link"><font color="#000000">Fibre Channel and SAN Clock Generation Using the CDCM6100x</font></a></strong> (HTM 8 KB) &nbsp;320&nbsp;次查看<br />
                2009年 2月 18日 <!-- Modified for WEB 00587 - Site tagging (Added target=blank) --><a class="abstract" href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=scaa099"><font color="#ea272a">浏览摘要</font></a> (英文內容)</li>
                <li class="abstract"><strong><a href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=scaa100" name="&amp;lid=zh_cn_folder_ee_app_notes_action_link"><font color="#000000">Ethernet Clock Generation Using the CDCM6100x</font></a></strong> (HTM 8 KB) &nbsp;804&nbsp;次查看<br />
                2009年 2月 18日 <!-- Modified for WEB 00587 - Site tagging (Added target=blank) --><a class="abstract" href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=scaa100"><font color="#ea272a">浏览摘要</font></a> (英文內容)</li>
                <li class="abstract"><strong><a href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=scaa082" name="&amp;lid=zh_cn_folder_ee_app_notes_action_link"><font color="#000000">High Speed Layout Guidelines</font></a></strong> (HTM 8 KB) &nbsp;3242&nbsp;次查看<br />
                2006年 11月 30日 <!-- Modified for WEB 00587 - Site tagging (Added target=blank) --><a class="abstract" href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=scaa082"><font color="#ea272a">浏览摘要</font></a> (英文內容)</li>
                <li class="abstract"><strong><a href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=scaa052a" name="&amp;lid=zh_cn_folder_ee_app_notes_action_link"><font color="#000000">Using TI's CDCV304 w/Backplane Transceiver (TLK1201/1501/2201/2501/2701/3101)</font></a></strong> (HTM 8 KB) &nbsp;3636&nbsp;次查看<br />
                2006年 4月 20日 <!-- Modified for WEB 00587 - Site tagging (Added target=blank) --><a class="abstract" href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=scaa052a"><font color="#ea272a">浏览摘要</font></a> (英文內容)</li>
                <li><strong><a target="_blank" href="http://www.ti.com/cn/litv/pdf/slyt179" name="&amp;lid=zh_cn_folder_ee_app_notes_action_link"><font color="#000000">Skew definition and jitter analysis</font></a> </strong>(PDF 253 KB) &nbsp;3435&nbsp;次查看<br />
                2005年 3月 11日 <!-- Modified for WEB 00587 - Site tagging (Added target=blank) -->(英文內容)</li>
                <li class="abstract"><strong><a href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=slla098a" name="&amp;lid=zh_cn_folder_ee_app_notes_action_link"><font color="#000000">Using Signaling Rate and Transfer Rate</font></a></strong> (HTM 8 KB) &nbsp;3697&nbsp;次查看<br />
                2005年 2月 7日 <!-- Modified for WEB 00587 - Site tagging (Added target=blank) --><a class="abstract" href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=slla098a"><font color="#ea272a">浏览摘要</font></a> (英文內容)</li>
                <li class="abstract"><strong><a href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=slla120" name="&amp;lid=zh_cn_folder_ee_app_notes_action_link"><font color="#000000">Interfacing Between LVPECL, VML, CML and LVDS Levels</font></a></strong> (HTM 9 KB) &nbsp;4332&nbsp;次查看<br />
                2002年 12月 17日 <!-- Modified for WEB 00587 - Site tagging (Added target=blank) --><a class="abstract" href="http://focus.ti.com.cn/cn/general/docs/litabsmultiplefilelist.tsp?literatureNumber=slla120"><font color="#ea272a">浏览摘要</font></a> (英文內容)</li>
            </ul>
            </div>
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</div><p align=right><font color=#000066> joy 最后编辑于 2010-7-6 14:36:09</font></p>]]></description></item></channel></rss>