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class="proBig"><div id="q2ao2nz" 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="e4k3vzw" 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="6k3iyfh" 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>巫山程控交換機價格</p><p><span>***更新：</span>2020-06-21 21:17:14</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="ml3evgx" 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="ib8k7kf" class="page-proshow02"><p class="title">詳細說明</p><div id="w8w98fm" class="box"><p><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、半導體元件及電感、電容、電阻，巫山程控交換機價格.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.，巫山程控交換機價格. 　　這樣．即使是感應雷所形成的感應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，巫山程控交換機價格、電源電路和數(shù)據(jù)傳輸電路中感應生成過電壓。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><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="巫山程控交換機價格" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989701226092028_njdswy_1867050.png"></div><p style="text-indent:25px">程控電腦交換機，集團電腦交換機，電話交換機系統(tǒng) 1.安裝電話交換機好處作用之一------各辦公室共用外線一臺電話交換機可以使一、二條外線就分配給十幾或幾十個員工（或科室、部門）使用。為貴公司每一名員工安排一部分機，這樣即能節(jié)約費用，又節(jié)約人工的同時，對于外線打入者也會以zui快的速度與要聯(lián)系的人聯(lián)系。 2.安裝集團電話交換機好處作用之二------管理功能電話交換機可以限制，一些部門允許打長途，一些部門允許打市話，有些部門只允許打內(nèi)部電話，還可以管理監(jiān)控各辦公室的詳細話費清單。 3.安裝程控電話交換機好處作用之三------內(nèi)部通話** 分機內(nèi)部**通話，無需支付電話費、無月租費、無承諾話費。 4.安裝程控交換機好處作用之四------可以相互轉(zhuǎn)接外線電話打進來可通過分機轉(zhuǎn)接，而不用使員工跑來跑去接電話或來回找人接電話。程控交換機，全稱為存儲程序控制交換機（與之對應的是布線邏輯控制交換機，簡稱布控交換機），也稱為程控數(shù)字交換機或數(shù)字程控交換機。通常專指用于電話交換網(wǎng)的交換設(shè)備，它以計算機程序控制電話的接續(xù)。程控交換機是利用現(xiàn)代計算機技術(shù)，完成控制、接續(xù)等工作的電話交換機。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="巫山程控交換機價格" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989701226871328_njdswy_4837658.png"></div><p style="text-indent:25px">防雷擊可采取以下措施： 1．程控交換機應有良好的工作接地和保護接地.接地電阻值應小于3Ω..每年都應檢測并有檢測報告.. 2．程控交換機各控制板和外接電纜插口處應安裝光電隔離器.. 3．電話電纜的屏蔽接地線應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)應采用屏蔽電纜.屏蔽層應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、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></p><br /><p>文章來源地址: 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