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tcPro"><section class="home-main container clearfix"><div id="pogvn7s" class="twoCol"><div id="7ho3tkm" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_txcp/">通信產(chǎn)品</a>?<a href="http://www.cdcfah.com/cp/second-txcp_csjhsb/">傳輸、交換設(shè)備</a>?<a href="http://www.cdcfah.com/cp/third-csjhsb_dhjhj/">電話交換機</a>?上海專業(yè)程控交換機南京德世偉業(yè)軟件技術(shù)供應(yīng)</p><div id="c88ub8i" class="leftbox clearfix"><h1>上海專業(yè)程控交換機南京德世偉業(yè)軟件技術(shù)供應(yīng)</h1><div id="2vs984o" class="proBig"><div id="gv7m8pt" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989701226092028_njdswy_1867050.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="lacwne3" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989701226092028_njdswy_1867050.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="sbisjqf" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>上海專業(yè)程控交換機</p><p><span>***更新：</span>2020-06-29 16:23:28</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="gac7rlc" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">南京德世偉業(yè)軟件技術(shù)有限公司</a></p><p><span>聯(lián)系人：</span>李永亮</p><p><span>郵箱: </span>634765682@qq.com</p><p><span>電話: </span>13276689930</p><p><span>傳真: </span>025_84728227</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>025-84728227</p><p><span>地址: </span>經(jīng)濟開發(fā)區(qū)恒盛路5號4號樓215-D室</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="wv87gyf" class="page-proshow02"><p class="title">詳細說明</p><div id="3y2rv7s" class="box"><p><p style="text-indent:25px">防雷擊可采取以下措施： 1．程控交換機應(yīng)有良好的工作接地和保護接地.接地電阻值應(yīng)小于3Ω..每年都應(yīng)檢測并有檢測報告.. 2．程控交換機各控制板和外接電纜插口處應(yīng)安裝光電隔離器.. 3．電話電纜的屏蔽接地線應(yīng)和保護接地極連接良好.. 4．是程控交換機供電的交流電路(從配電室到交換機)應(yīng)采用屏蔽電纜.屏蔽層應(yīng)和保護接地極連接良好.. 交換機遭雷擊損壞大多由雷電天氣在網(wǎng)線上產(chǎn)生的感應(yīng)電壓經(jīng)交換機信號端口竄入機內(nèi)造成，一般的整機防雷措施如裝設(shè)避雷針、機殼接地等無法解決這個問題。一般交換機信號端口內(nèi)部都設(shè)計有防雷擊電路，可以抵抗一般的輕微雷擊，但對大型雷電產(chǎn)生的雷擊則有些力不從心。為進一步解決信號端口引進的雷擊問題，可以采取以下一些措施： 1、外線盡量使用鎧裝電纜，并將鎧裝層妥善接地； 2，上海專業(yè)程控交換機，上海專業(yè)程控交換機，上海專業(yè)程控交換機、在外線與交換機端口之間加接防雷單元，具體措施有： ①串接防雷模塊， ②串接LC吸收單元， ③并接過壓保護元件， ④串接其它防雷保護電路。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海專業(yè)程控交換機" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989701226092028_njdswy_1867050.png"></div><p style="text-indent:25px">經(jīng)常會有人問電話交換機的作用是什么,簡單的說:程控交換機的作用就是　　1)共用外線 5個人或10個人共用一條外線。(起初這樣做的目的是為了節(jié)省電話月租，在90年代，固定電話月租很高，如一個公司有500員工，不可能沒人都申請一條直線，那樣的話，月租就是很大的一筆費用。公司要讓大家每個人都有電話用，又想減少成本支出，買電話交換機就成了一種折中的方案。----每月把錢交給電信運營商，我還不如省下月租，買個程控交換機，在一年之后，電話交換機的成本也就回來了，以后就是賺的了。　　2)管理功能 (現(xiàn)在大家都有電話用了，但是又有個問題：如果不能管理，電話費又上來了。所以又要做一些限制，一些人允許打長途，一些人允許打市話，有些人只允許打內(nèi)部電話，所以第二點就是管理。　　3)內(nèi)部通話**(如果是本地電話，同事之間溝通，還需要向電信局交錢。所以在起初正是因為這個原因，也推動了電話交換機的普及?，F(xiàn)在電信運營商推出了匯線通，集線通也可以內(nèi)部通話**。　　4)可以相互轉(zhuǎn)接(一個電話同甲同事講完后可以再轉(zhuǎn)給乙同事。匯線通，集線通也有此功能。　　5)其他功能(代接，代答，內(nèi)部廣播，保留音樂，電話計費，電腦話務(wù)員，語音信箱，外接廣播。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海專業(yè)程控交換機" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989701226871328_njdswy_4837658.png"></div><p style="text-indent:25px"> 對電話程控交換機遭受雷擊的情況分析：***.電話程控交換機是由多塊功能電路板拼插組成.電路板上有許多功能集成塊、半導(dǎo)體元件及電感、電容、電阻.其**能集成塊中大量采用CMOS電路.工作電壓在0.7~5V..CMOS電路的過電壓能力弱.容易損壞.造成電路板甚至整個程控交換機系統(tǒng)故障..第二.由于電話交換機是很多電纜、電線的**點..電話分機線路多在幾十米至上百米的長度.涉及區(qū)域廣、范圍大.更易受雷擊.. 　　這樣．即使是感應(yīng)雷所形成的感應(yīng)過電壓對電話程控交換機都能形成威脅..雷擊在建筑物(機房或辦公樓)、設(shè)備(電話程控交換機)及電纜電路的附近發(fā)生；或閃電不直接對地放電.只是在距建筑物較近的云層和云層之間放電.閃電釋放電荷所形成的強電磁場.通過電話程控交換機的密集的網(wǎng)線、電源電路和數(shù)據(jù)傳輸電路中感應(yīng)生成過電壓。這種“過電壓”或?qū)㈦娫茨K.或?qū)?shù)據(jù)存儲器及微處理器、電話程控交換機用戶板擊壞。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/437041.html</p></div></div></div></div></div><div id="znuo2qm" class="page-right twoColRt"><div id="3mbspwn" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="smtqs3o" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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