lianglyq2006 发表于 2011-7-29 15:07:00

[转帖]电话交换机原理:模拟用户接口概述

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<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">模拟用户接口是集团电话、</span><span style="COLOR: black; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">程控交换机</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">连接普通模拟终端(如:普通电话机、传真机等)的接口电路,也常称为:用户端口。在交换系统中,由于处理交换采用数字化和集成化,对于电流和电压较高的电信号不能被直接处理,所以许多功能必须由用户接口电路来处理。这部分电路单元通常占交换机系统总成本的</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">60%</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">左右,就是我们在集团电话、</span><span style="COLOR: black; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">程控交换机</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">中所说的:<b>模拟用户板、专用分机板、数字分机板</b>等等。单位一般是按线数或者端口数算,例如:每板</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">8</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">端口、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">16</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">端口、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">24</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">端口。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">用户电路的功能</span></strong><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">:</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体" lang="EN-US">1</span></strong><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">,馈电</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">俗成:供电。馈电方式有电压馈电和电流馈电两种。所有连接在交换系统的终端,都是由交换机向其供电。一般</span><span style="COLOR: black; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">程控交换机</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">的馈电电压在</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">48V</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">,通话馈电电流在</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">20</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">毫安</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">—50</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">豪安之间。小型</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><a href="http://www.rcom.com.cn/" target="_blank"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana" lang="EN-US"><span lang="EN-US">集团电话</span></span></a></span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">及部分进口</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><a href="http://www.rcom.com.cn/" target="_blank"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana" lang="EN-US"><span lang="EN-US">集团电话</span></span></a></span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">的馈电电压在</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">30V</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">左右,馈电电流在</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">20</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">毫安</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">—60</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">毫安之间,这就是为什么</span><span style="COLOR: black; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">程控交换机</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">比</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><a href="http://www.rcom.com.cn/" target="_blank"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana" lang="EN-US"><span lang="EN-US">集团电话</span></span></a></span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">传输距离更远的原因之一。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体" lang="EN-US">2</span></strong><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">,过压保护</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">即使在外部配线部分安装保安器,并且接地以后,在雷击等瞬间高压时,其残余端电压仍会在</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">100V</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">以上,这对交换机来说是致命大打击,故必须采取过压保护措施。相应的会有过流、过压保护。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体" lang="EN-US">3</span></strong><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">,振铃</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">振铃电压较高,国内一般为</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"> 90V</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">左右。一般采用继电器来控制铃流接点。振铃是由交换机系统来控制,当需要振铃时,发出控制信号,是继电器闭合,振铃电路发出铃流信号至用户。当用户摘机时,摘机信号由振铃监视电路检测,立即切断振铃。有些</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><a href="http://www.rcom.com.cn/" target="_blank"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana" lang="EN-US"><span lang="EN-US">集<span lang="EN-US">团<span lang="EN-US">电<span lang="EN-US">话</span></span></span></span></span></a></span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">这部分功能由高压电子器件实现,取消掉了继电器。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体" lang="EN-US">4</span></strong><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">,状态监控</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">&nbsp;&nbsp;&nbsp; </span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">通过对线路的通</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">/</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">断状态可以反馈出以下状态:</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">1</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">,用户摘机、挂机、通话状态。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">2</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">,话机拨号发码。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体" lang="EN-US">5</span></strong><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">,信号转换</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">用户电路实际上是模拟电路和数字电路间的接口。用户电路从终端方收到的都是电信号的模拟信号,所以上交处理系统时转换成数字信号,这部分是由编码器实现的。同样在收到处理结果为数字信号要变成模拟信号,这部分是由译码器来实现的。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体" lang="EN-US">6</span></strong><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">,混合电路</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">普通话机送出的信号都是模拟信号,采用二线进行双向传输,而专用话机等用到</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">PCM</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">数字信号,在去话方向上进行编码,在来话方向上需要译码,这样就必须采用四线制传输。这就是为什么一些</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><a href="http://www.rcom.com.cn/" target="_blank"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana" lang="EN-US"><span lang="EN-US">集团电话</span></span></a></span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><a href="http://www.rcom.com.cn/"></a></span><span style="COLOR: black; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">程控交换机</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">上的专用话机需要四芯线路,而通常所说的数字话机专用话机,为必是全数字话机,正规说应该是叫做:混合专用话机。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>

lianglyq2006 发表于 2011-7-29 15:09:00

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<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><a href="http://www.rcom.com.cn/" target="_blank"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana" lang="EN-US"><span lang="EN-US">电话交换机</span></span></a></span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">信号音介绍</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt"> <span lang="EN-US"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><a href="http://www.rcom.com.cn/" target="_blank"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana" lang="EN-US"><span lang="EN-US">电话交换机</span></span></a></span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">信号音是交换机送往终端用户或者终端设备的信号</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">,</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">电话局通过使用不同的信号音来表示不同的接续状态</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">.<o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体" lang="EN-US">1.</span></strong><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">拨号音</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">用来通知用户端可以开始拨号</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">,</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">即交换设备已作好介绍数字信号的准备</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">,</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">等待数字信号的到来</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体" lang="EN-US">2.</span></strong><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">回铃音</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">&nbsp;&nbsp;&nbsp; </span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">通知主叫用户端</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">,</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">表示该次呼叫接续成功</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">,</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">被叫用户已接通</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">,</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">正在处于振铃状态</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">.<o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体" lang="EN-US">3.</span></strong><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">铃流</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">铃流又成振铃信号</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">.</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">用来呼叫被叫用户</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">,</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">可以摘机通话</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">.<o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体" lang="EN-US">4,</span></strong><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">忙音</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">表示本次接续过程中</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">,</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">遇到交换设备忙或被叫用户忙</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">,</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">通知主叫端,本次呼叫失败,请重新挂机重新呼叫。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-family: 宋体" lang="EN-US">5.</span></strong><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体">空号音</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US"><o:p></o:p></span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; LINE-HEIGHT: 150%"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">&nbsp;&nbsp;&nbsp; </span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">通知主叫用户</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">,</span><span style="LINE-HEIGHT: 150%; COLOR: black; FONT-SIZE: 10.5pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana">所发出的被叫号码不存在或属于首限制的号码</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10.5pt" lang="EN-US">.<o:p></o:p></span></p>

地狱的末班车 发表于 2011-8-2 07:00:00

<p>实用,菜鸟受教了,感谢楼主,等待更新 。</p>

szpbxoa 发表于 2011-8-3 17:21:00

&nbsp;日日通.

几拉拉 发表于 2011-9-13 11:03:00

积分啊 ~!!奋斗了好几天都不行啊

jsjzhengming 发表于 2011-9-14 12:15:00

好像还有“催挂音”“忙音”“静音”等情况哦!

symljin 发表于 2012-10-31 23:25:00

<p>这也用介绍?</p>
<p>&nbsp;</p>

tjzhangjun 发表于 2014-2-23 15:54:04

学习了
页: [1]
查看完整版本: [转帖]电话交换机原理:模拟用户接口概述