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id="5tnbvhx" class="tabs"><a href="JavaScript:;" data-type="product" class="active">產(chǎn)品</a><a href="JavaScript:;" data-type="member" class="">公司</a><a href="JavaScript:;" data-type="article" class="">資訊</a><a href="JavaScript:;" data-type="exhibition" class="">展會</a></div><div id="3dr7jhn" class="clearfix searchWrap"><div id="ztjzl7j" class="searchInput"><input type="text" name="keywords" placeholder="請輸入搜索關(guān)鍵詞" id="kd"><a href="javascript:void(0)" class="searchBtn" id="search">搜索</a></div></div></div></div></header><nav class="navbox"><div id="dpnbx5h" class="container"><ul><li id = "index_index"><a href="http://www.cdcfah.com/"><span>首頁</span></a></li><li id = "index_company"><a ><span>企業(yè)名錄</span></a></li><li id = "index_product"><a href="http://www.cdcfah.com/cp/"><span>產(chǎn)品供應(yīng)</span></a></li><li id = "index_news"><a href="http://www.cdcfah.com/zx/"><span>新聞資訊</span></a></li><li id = "index_article"><a href="http://www.cdcfah.com/xw/"><span>行業(yè)資訊</span></a></li><li id = "index_show"><a href="http://www.cdcfah.com/zh/"><span>展會信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="njpnlhl" class="twoCol"><div id="p7fdbhd" 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(jī)</a>?鹽城電話交換機(jī)維修南京德世偉業(yè)軟件技術(shù)供應(yīng)</p><div id="nxfbrfj" class="leftbox clearfix"><h1>鹽城電話交換機(jī)維修南京德世偉業(yè)軟件技術(shù)供應(yīng)</h1><div id="vh9j79h" class="proBig"><div id="jlzv9bl" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706098401482_njdswy_2381943.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="9vjhlx9" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706098401482_njdswy_2381943.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="7dpvrnt" 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>鹽城電話交換機(jī)維修,電話交換機(jī)</p><p><span>***更新：</span>2020-07-09 17:21:25</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="jvt9pnt" 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(jī): </span>025-84728227</p><p><span>地址: </span>經(jīng)濟(jì)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="x7rh9lj" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="77zntpl" class="box"><p><p style="text-indent:25px">OM20G (＜20人) OM20G是專為小微型企業(yè)或企業(yè)分支機(jī)構(gòu)打造的新一代IP電話交換機(jī)。它支持運(yùn)營商IMS接入，融合了電話、傳真、錄音、客戶管理、手機(jī)分機(jī)、錄音轉(zhuǎn)寫文字等業(yè)務(wù)，為用戶創(chuàng)造一體化的溝通體驗(yàn)。提高來話溝通體驗(yàn) 自動播報上下班來電歡迎詞、智能分配/轉(zhuǎn)接來電、固話與手機(jī)同振、手機(jī)分機(jī)，鹽城電話交換機(jī)維修、一號雙終端、語音留言……電話不再漏接，客戶溝通更緊密。節(jié)省辦公通信費(fèi)用通過互聯(lián)網(wǎng)自由接入IP話機(jī)、電腦分機(jī)、手機(jī)分機(jī)，并將國際國內(nèi)長途變?yōu)槭性捇?*電話，大幅降低公司電話費(fèi)用。管理每個電話 OM20G電話交換機(jī)內(nèi)置儂好商務(wù)助理軟件，可提供來電彈屏、通迅錄點(diǎn)擊撥號、**管理、錄音和通話記錄管理、錄音轉(zhuǎn)寫文字等功能，鹽城電話交換機(jī)維修，助力企業(yè)總機(jī)、員工和客戶三者之間的溝通。智簡管理，本地+遠(yuǎn)程皆可維護(hù) OM20G電話交換機(jī)提供直觀Web網(wǎng)頁配置，方便管理員進(jìn)行本地或遠(yuǎn)程管理，鹽城電話交換機(jī)維修。分支機(jī)構(gòu)的OM20G，還可由總部統(tǒng)一管理。鹽城電話交換機(jī)維修</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="鹽城電話交換機(jī)維修,電話交換機(jī)" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706098401482_njdswy_2381943.png"></div><p style="text-indent:25px">熱敏電阻熱敏電阻可用作加熱元件外，同時還能起到“開關(guān)”的作用，兼有敏感元件、加熱器和開關(guān)三種功能，稱之為“熱敏開關(guān)”．電流通過元件后引起溫度升高，即發(fā)熱體的溫度上升，當(dāng)超過居里點(diǎn)溫度后，電阻增加，從而限制電流增加，于是電流的下降增加元件溫度降低，電阻值的減小又使電路電流增加，元件溫度升高，周而復(fù)始，因此具有使溫度保持在特定范圍的功能，又起到開關(guān)作用．利用這種阻溫特性做成加熱源，作為加熱元件應(yīng)用的有暖風(fēng)器、電烙鐵、烘衣柜、空調(diào)等，還可對電器起到過熱保護(hù)作用． NTC熱敏電阻器是一種負(fù)溫度系數(shù)熱敏電阻器，該產(chǎn)品的電阻值隨溫度升高而降低，根據(jù)其作用封裝成各種形狀以及具有不同的技術(shù)指標(biāo)。該產(chǎn)品主要用于溫度補(bǔ)償、溫度測量和在各類電源中吸收浪涌電流作為線路保護(hù)元件。同樣與壓敏電阻類似，熱敏電阻同樣在集團(tuán)電話交換機(jī)生產(chǎn)設(shè)計(jì)的時候已經(jīng)***采用。上述兩道防護(hù)措施防護(hù)普通的過流過壓保護(hù)已經(jīng)足夠了，但*靠它門來對付高達(dá)上萬V的雷電時它們就力不從心了，瞬間會被擊穿、損壞。壓敏電阻和熱敏電阻共同的特點(diǎn)是：反映速度快能盡量避免高壓通過的瞬間損害設(shè)備，抗壓系數(shù)低，都是在低電壓的工作狀態(tài)。麗水電話交換機(jī)多少錢</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="鹽城電話交換機(jī)維修,電話交換機(jī)" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706097149850_njdswy_3649872.png"></div><p style="text-indent:25px">氣體放電管陶瓷氣體放電管是在放電間隙內(nèi)充入適當(dāng)?shù)亩栊詺怏w介質(zhì)。配以高活性的電子發(fā)射材料及放電引燃機(jī)構(gòu)，通過貴金屬焊料高溫封接而成的一種特殊的金屬陶瓷結(jié)構(gòu)的氣體放電器件。它可用于瞬間過電壓防浪涌，也可用作點(diǎn)火。其高阻抗、低極間電容和高耐沖擊電流是其它放電管所不具備的。當(dāng)線路有瞬時過電壓竄入時，放電管被擊穿，阻抗迅速下降，幾乎是短路狀態(tài)。放電管將大電流通過線路接地或回路泄放，也將電壓限制在低電位，從而保護(hù)了線路及設(shè)備。當(dāng)過電壓浪涌消失后，又迅速的恢復(fù)到的高阻狀態(tài)，保證線路的正常工作。氣體放電管的特點(diǎn)是：抗高壓、抗高電流沖擊（75-4000V），但在響應(yīng)時間上會比低壓防護(hù)電路元件要慢，放電時間長、動作靈敏度不夠理想，對于波頭上升陡度較大的雷電波難以有效地抑制。相對放電時間越短、耐壓越高的**其性能會越好當(dāng)然造價會越高。在電話交換機(jī)行業(yè)應(yīng)用上把氣體放電管類的產(chǎn)品用做配線部分也就是外部的防雷、防高壓措施。也就是我們建議廣大用戶配該類放雷措施的主要組成器件，銜接于電話交換機(jī)與線路之間。</p><p style="text-indent:25px">電話交換機(jī)常見防雷（過流、過壓）保護(hù)器件及其應(yīng)用特性壓敏電阻：壓敏電阻是在一定電流電壓范圍內(nèi)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(dǎo)體，所以它是半導(dǎo)體電阻器的一個品種。現(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(diǎn)是當(dāng)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(dāng)于一只關(guān)死的閥門，當(dāng)電壓超過UN時，流過它的電流激增，相當(dāng)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(hù)電路免受過電壓的損害。其特點(diǎn)是：反映速度快、耐高壓系數(shù)底，適用于元件級別的保護(hù)、靜電保護(hù)、浪涌保護(hù)。現(xiàn)在我們現(xiàn)在電話交換機(jī)設(shè)計(jì)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(dāng)電壓小于270V時（正常值為220V）它相當(dāng)于不導(dǎo)通，而當(dāng)電源異常，短時超過270V時，它就導(dǎo)通，形成短路，將電壓限制在270V。</p><p style="text-indent:25px">電話交換機(jī)內(nèi)部采用壓敏電阻+熱敏電阻+外部氣體放電管構(gòu)建成三級防雷措施，當(dāng)然也有更高級別的防護(hù)措施的如：高精斷的昂貴儀器采用四級、五級的防護(hù)措施，但由于其造價也非常昂貴用做電話交換機(jī)行業(yè)顯然不太現(xiàn)實(shí)。雷電很強(qiáng)大，有時候大的你無法想象，任何一種措施都無法**完全避免雷電的損害。對于集團(tuán)電話交換機(jī)設(shè)備來說有高于5V的電壓就有損壞設(shè)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(yàn)：完全沒有防護(hù)措施的設(shè)備在遭遇中、輕度雷電的損壞的情況損壞程度會達(dá)到70%以上，擁有內(nèi)部元件級防護(hù)（壓/熱敏元件）損失程度在50-20%之間，采用質(zhì)量好的三級防護(hù)損失程度會在20%--0% 輕微損壞或完全防護(hù)。各級放護(hù)元件根據(jù)其特性、標(biāo)準(zhǔn)值會有一個極限值當(dāng)遭遇強(qiáng)電超出其可耐受范圍時就會出現(xiàn)“魚死網(wǎng)破”的局面…..防護(hù)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(dǎo)致防護(hù)元件無法重復(fù)使用必須更換，但相對于減輕對設(shè)備價值角度來講這點(diǎn)損失是完全有必要的。所以即使有相關(guān)的防護(hù)措施的用戶應(yīng)當(dāng)在雷雨過后或每年雷雨季節(jié)到來之前檢查是否完好。麗水電話交換機(jī)多少錢</p><p style="text-indent:25px">鹽城電話交換機(jī)維修</p><p style="text-indent:25px">對任何一個企業(yè)對于設(shè)備采購、應(yīng)用的花費(fèi)都是屬于投資價值，使用的周期越長、功能越完善、減少維護(hù)費(fèi)用、故障率意味著對設(shè)備的投資價值得一體現(xiàn)，電話交換機(jī)做為一種企業(yè)通信辦公設(shè)備也不例外。在某些雷雨多發(fā)區(qū)域，雷電的危害被宿稱為：電話交換機(jī)***….每年此類設(shè)備遭受雷電的損壞不計(jì)其數(shù)，很大一部分設(shè)備是由于此原因而光榮“退伍”。由此集團(tuán)電話交換機(jī)、程控交換機(jī)防雷設(shè)備彰現(xiàn)出其很大價值。減少直接損害：防雷措施可以避免由于雷電等過壓、過流的原因?qū)е略O(shè)備的直接損壞或減少對設(shè)備的直接損壞。延長設(shè)備使用周期。非重復(fù)性投資：防雷設(shè)備可以伴隨電話交換機(jī)、程控交換機(jī)、調(diào)度機(jī)等設(shè)備的“一生”。通常設(shè)備的正常使用壽命周期大約在5-10年（視老化情況），而防雷設(shè)備幾乎不存在老化的情況，即使更換設(shè)備原有的防護(hù)設(shè)備仍然可以繼續(xù)有效使用。 3，低維護(hù)成本正常情況下，防雷設(shè)備是不需要維護(hù)，即使發(fā)生了每一次的損耗，如：被擊傳等現(xiàn)象，*需要更換該線路的**元件。每一次損耗都是對設(shè)備保護(hù)價值的體現(xiàn)。幾百元至幾千元的防雷設(shè)備投資對數(shù)千元甚至數(shù)萬的設(shè)備來講，完全是有價值的。鹽城電話交換機(jī)維修</p><p style="text-indent:25px">南京德世偉業(yè)軟件技術(shù)有限公司致力于通信產(chǎn)品，以科技創(chuàng)新實(shí)現(xiàn)***管理的追求。公司自2010-10-20成立以來，投身于[ "SIP話機(jī)", "IP電話機(jī)", "集團(tuán)電話", "億聯(lián)IP話機(jī)" 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