浅谈E1线路维护技术与应用

evid

<p style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt;"><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">随着信息化步伐的加速，数字通信正全方位的改变我们传统的通信方式以及通信质量。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">无论是何种新业务的推出和运营，都离不开强有效并且高可靠的传输来保证。随之而带来的问题就是如何对系统的传输质量进行测量和保证。误码测试仪是一种能够实现此功能，并且通过检测反映数据传输设备及其信道工作质量的误码损伤性能指标，对其进行传输质量分析的有效工具。在电信运营、工程验收、科研、设备生产、教学实验等各方面，误码仪都是必不可少的通信测量和线路维护的最佳辅助工具。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">二、误码测试的基本概念</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/><span class="px14"><font face="Times New Roman">1</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">．误码</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">　　误码是指信号在传输过程中，受到线路传输和设备传输的影响码元发生了错误。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/><span class="px14"><font face="Times New Roman">2</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">．误码性能指标</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">1</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">G.821</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">建议规范的是用于语声业务、或用于数据型业务</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">“</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">载体信道</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">”</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">的</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">N×64kbit/s</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">电路交换数字连接的误码性能事件、参数和指标。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; G.821</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">分析的数据与指标：误码秒（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">ES</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）、无误码秒（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">EFS</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）、严重误码秒（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">SES</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）、不可用秒（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">UAS</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">2</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">G.826</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">建议规范的是运行在基群和基群以上速率国际固定比特率数字通道的误码性能事件、参数和指标。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; G.826</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">分析的数据与指标：误块（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">EB</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）、误块秒（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">ES</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）、严重误块秒（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">SES</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）、背景误块秒（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">BBE</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）、不可用秒（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">UAS</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">3</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">M.2100</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">建议专门用来明确表示连接质量，以便服务提供者进行长期的测试分析。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">　　</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">M.2100</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">分析的数据与指标：误码秒（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">ES</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）、严重误码秒（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">SES</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）、不可用秒（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">UAS</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">三、误码测试的常用方法</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">　　误码测试仪主要是针对</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">E1</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">信道的测量而设计的，但多数仪表还具有终接设备性能测试和运行监测功能。由于差错性能测试是</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">E1</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">信道测量的主要内容，有些仪表还利用仪表内必须具备的差错测试资源增加了数据通信的误码测试功能。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/><span class="px14"><font face="Times New Roman">1.E1</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">传输信道</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">　　数字网络可以是</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">DH</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">网，或是</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">SDH</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">网；复接设备可能是</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">DH</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">数字复用设备（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">MUX/DEMUX</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">），也可能是</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">SDH</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">终端复用设备；终接设备的种类很多，如数据复用器、数字交叉连接（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">DXC</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）设备、各种接口转换器等。终接设备与复接设备之间采用</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">2048kbit/s E1</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">接口。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/><span class="px14"><font face="Times New Roman">2.</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">几种常见的</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">E1</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">信道的测试模式、测试方法以及主要测试参数</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">　　（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">1</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）断业务测试模式（或者离线测试模式）：</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">测试前提：线路中没有实际数据信号进行传输，但包括</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">E1</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">线路以及相关复接设备、终接设备在内都处在正常可用状态。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">误码仪连接方法：同时将发送端</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">Tx</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">和接收端</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">Rx</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">与设备的接收端</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">Rx</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">和发送端</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">Tx</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">端连接。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">　　使用一台误码测试通过</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">G</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">．</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">703</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">接口直接与复接设备相连，仿真终接设备模拟数据的发送和接收。此终接设备仿真测试多用在终接设备为数据复用器的场合。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">在断业务测试模式下，可进行如下测试：</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><br/><span class="px14"><font face="Times New Roman">● </font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">线路频率、频率偏差。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><span class="px14"><font face="Times New Roman">● </font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">线路频率偏差容限（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">Offset Tolerance</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）的测量。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><span class="px14"><font face="Times New Roman">● </font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">帧开销比特</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">(Overhead bits)</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">的编辑、监测和分析。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><span class="px14"><font face="Times New Roman">●</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">载荷的设置和测试。可以选择非成帧（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">Unframed</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）、成帧随路信令（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">CAS</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）、成帧公共信道信令（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">CCS</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">在成帧方式</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">,</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">又可以指定哪些时隙组成</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">N×64kbit/s</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">数据通道接至仪表内部的图案发生器和误码检测器，进行误码测试。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><span class="px14"><font face="Times New Roman">● </font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">环路往返时延（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">RTD</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">：</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">Round Trip Delay</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）测试。可以在非成帧或者</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">N×64kbit/s</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">方式下</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">RTD</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><span class="px14"><font face="Times New Roman">● </font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">差错（</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">Error</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）测试，</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">G.821</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">、</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">G.826</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">、</span></span><span class="px14"><span lang="EN-US" style="FONT-SIZE: 9pt;"><font face="Times New Roman">M.2100</font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">统计和分析。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span><span lang="EN-US" style="FONT-SIZE: 9pt;"><br/><span class="px14"><font face="Times New Roman">● </font></span></span><span class="px14"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">测试结果的处理。测试结果可以存储起来，也可以输出到打印机或计算机去。</span></span><span class="px14"><span style="FONT-SIZE: 9pt;"><font face="Times New Roman">
                                </font></span></span></p>