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class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706097149850_njdswy_3649872.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ymoaxeg" 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)品關鍵詞：</span>鄭州電話交換機價格</p><p><span>***更新：</span>2020-06-28 13:18:31</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="eikheqx" 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="lu8ebtk" class="page-proshow02"><p class="title">詳細說明</p><div id="fjteb8l" class="box"><p><p style="text-indent:25px">電話交換機內部采用壓敏電阻+熱敏電阻+外部氣體放電管構建成三級防雷措施，當然也有更高級別的防護措施的如：高精斷的昂貴儀器采用四級、五級的防護措施，但由于其造價也非常昂貴用做電話交換機行業(yè)顯然不太現(xiàn)實。雷電很強大，有時候大的你無法想象，鄭州電話交換機價格，任何一種措施都無法**完全避免雷電的損害。對于集團電話交換機設備來說有高于5V的電壓就有損壞設備的可能，所以一般的防雷措施都是盡量的去避免雷電的損壞、減少損壞的程度。根據(jù)我們的經(jīng)驗：完全沒有防護措施的設備在遭遇中，鄭州電話交換機價格、輕度雷電的損壞的情況損壞程度會達到70%以上，擁有內部元件級防護（壓/熱敏元件）損失程度在50-20%之間，采用質量好的三級防護損失程度會在20%--0% 輕微損壞或完全防護。各級放護元件根據(jù)其特性、標準值會有一個極限值當遭遇強電超出其可耐受范圍時就會出現(xiàn)“魚死網(wǎng)破”的局面….，鄭州電話交換機價格.防護元件在消耗一部分能量之后會被擊傳！損壞、甚至炸裂…這種現(xiàn)象會導致防護元件無法重復使用必須更換，但相對于減輕對設備價值角度來講這點損失是完全有必要的。所以即使有相關的防護措施的用戶應當在雷雨過后或每年雷雨季節(jié)到來之前檢查是否完好。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="鄭州電話交換機價格" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706097149850_njdswy_3649872.png"></div><p style="text-indent:25px">電話交換機常見防雷（過流、過壓）保護器件及其應用特性壓敏電阻：壓敏電阻是在一定電流電壓范圍內電阻值隨電壓而變的電阻，壓敏電阻器的電阻體材料是半導體，所以它是半導體電阻器的一個品種?，F(xiàn)在大量使用的是"氧化鋅"（ZnO）壓敏電阻器。壓敏電阻有什么用？壓敏電阻的比較大特點是當加在它上面的電壓低于它的閥值"UN"時，流過它的電流極小，相當于一只關死的閥門，當電壓超過UN時，流過它的電流激增，相當于閥門打開。利用這一功能，可以抑制電路中經(jīng)常出現(xiàn)的異常過電壓，保護電路免受過電壓的損害。其特點是：反映速度快、耐高壓系數(shù)底，適用于元件級別的保護、靜電保護、浪涌保護。現(xiàn)在我們現(xiàn)在電話交換機設計生產(chǎn)的時候基本都使用了氧化鋅壓敏電阻，這里使用的壓敏電阻的閥值電壓約為270V，當電壓小于270V時（正常值為220V）它相當于不導通，而當電源異常，短時超過270V時，它就導通，形成短路，將電壓限制在270V。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="鄭州電話交換機價格" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706098401482_njdswy_2381943.png"></div><p style="text-indent:25px">九、下載彩鈴及彩鈴音樂保持 1）、可以在互聯(lián)網(wǎng)上下載音樂或自錄廣告語作為電話響鈴音樂，同時也作為背景保持音樂。隨心所欲，充分體現(xiàn)個性化，突顯公司形象。十、局域網(wǎng)編程維護 1）、威譜TDMx-2000可以通過局域網(wǎng)和維護終端連接，這既解決了普通程控交換機只能和串口連接的距離限制（一般為幾十米），又解決了由于筆記本等非臺式電腦沒有串口無法維護的煩惱。 2）、設備通過自有IP接入單位內部局域網(wǎng)，網(wǎng)內任何電腦都可以通過后臺軟件維護交換機。無需親自到環(huán)境條件較差的機房。十一、內置計費通話話單 1）、支持延時、反極兩種計費方式，內部分機之間通話、分機打市話、分機打長途、市話呼入分機、長途呼入分機都有通話話單產(chǎn)生，交換機可存儲1萬條話單，可使用我司隨機器附送的光盤里的計費軟件，也可外配深圳梓博、深圳唐信計費軟件接收通話話單，統(tǒng)計通話費用金額。十二、內置外線轉手機功能 1）、分機可根據(jù)需要設置遇忙、無人接聽、呼叫前轉轉移到手機、固定電話。十三、數(shù)據(jù)備份功能 1）、主機可以同時儲存1組***數(shù)據(jù)庫和3組備份數(shù)據(jù)庫，當進行系統(tǒng)維護時，用戶也可以通過維護程序在PC側備份多套數(shù)據(jù)庫，同時可以將數(shù)據(jù)庫導出后存于可移動盤。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/423347.html</p></div></div></div></div></div><div id="t3d7ta3" class="page-right twoColRt"><div id="cqsprt3" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="udqxz2w" 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" class="vcenter" 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