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歡迎進(jìn)入廣州光橋通信官網(wǎng),我們的產(chǎn)品有:光纖收發(fā)器,工業(yè)交換機(jī),電話光端機(jī),工業(yè)4G路由器.

他們都在找: 工業(yè)PoE交換機(jī)光纖收發(fā)器視頻光端機(jī)電話光端機(jī)工業(yè)以太網(wǎng)交換機(jī)

當(dāng)前位置首頁 » 常見問題 » 光端機(jī)2m是什么意思,光端機(jī)E1與2M有什么關(guān)系

光端機(jī)2m是什么意思,光端機(jī)E1與2M有什么關(guān)系

返回列表 來源:光橋 查看手機(jī)網(wǎng)址
掃一掃!光端機(jī)2m是什么意思,光端機(jī)E1與2M有什么關(guān)系掃一掃!
瀏覽:- 發(fā)布日期:2020-04-27 09:19:27【
        光端機(jī)就是將多個E1信號變成光信號的設(shè)備,光端機(jī)也叫光傳輸設(shè)備。光端機(jī)根據(jù)傳輸E1(就是2M)口數(shù)量的多少,價格也不同。一般最小的光端機(jī)可以傳輸4個E1目前最大的光端機(jī)可以傳輸4032個E1每個E1包括30個電話。那么,光端機(jī)2m是什么意思,光端機(jī)E1與2M有什么關(guān)系呢?接下來我們就一起來詳細(xì)看看吧!

        光端機(jī)的種類,光端機(jī)分3類:PDH,SPDH,SDH。PDH光端機(jī)是小容量光端機(jī),一般是成對應(yīng)用,叫點到點應(yīng)用,容量一般為4E1,8E1,16E1。SDH光端機(jī)容量較大,一般是16E1到4032個E1,SPDH光端機(jī),介于PDH,和SDH之間。

        一般來說,光端機(jī)更多的是PDH光端機(jī),它是一種光電轉(zhuǎn)換設(shè)備,一般以1個光口兼4個2M速率電口的光端機(jī)最為普遍。電信運營商常用它來傳輸語音信號。在局端,光端機(jī)將2M電信號轉(zhuǎn)換成光信號在光纜上傳輸,到了用戶端后,再將光信號轉(zhuǎn)換成2M電信號,即下2M業(yè)務(wù)到PCM等語音設(shè)備上。而光纖收發(fā)器更多地被用在數(shù)據(jù)通信方面。它也是一種光電轉(zhuǎn)換設(shè)備,一般以1個光口兼數(shù)個以太口的光纖收發(fā)器為多,它將光信號轉(zhuǎn)換成以太信號,用來下數(shù)據(jù)業(yè)務(wù)到路由器或交換機(jī)等數(shù)據(jù)通信設(shè)備上。

        對于光端機(jī),2M基本是上一個1550波長有2M帶寬,用于傳輸485控制數(shù)據(jù),還有什么1.25G,155M之類的,那是視頻傳輸所需帶寬,基本上1路視頻要155M。

        光端機(jī)E1和2M實際上只是表達(dá)上的不同。E1是PDH歐洲標(biāo)準(zhǔn)中表示基群的表達(dá)方式(對應(yīng)北美標(biāo)準(zhǔn)基群為T1,即1.5M)。對于歐洲標(biāo)準(zhǔn)E1速率為2M,所以經(jīng)常用2M表示E1。也可以這樣說,E1是學(xué)名,2M是俗稱。在SDH時代,SDH復(fù)接關(guān)系中VC12(以及TU-12)的速率接近2M(實際上并非2048K),一些人也稱這些為2M,這實際上是不準(zhǔn)確的。

        對于設(shè)備上E1端口,一般稱為2M口,準(zhǔn)確地講應(yīng)當(dāng)是E1口才對。相應(yīng)地,34M口應(yīng)當(dāng)為E3口,45M口為DS3口。140M口為E4口。

        廣州光橋通信設(shè)備有限公司專業(yè)研發(fā)、生產(chǎn)通信設(shè)備。生產(chǎn)的主要設(shè)備有:工業(yè)交換機(jī),工業(yè)以太網(wǎng)交換機(jī),工業(yè)PoE交換機(jī),光纖收發(fā)器,光纖交換機(jī),多電口收發(fā)器,電話光端機(jī),視頻光端機(jī),協(xié)議轉(zhuǎn)換器(網(wǎng)橋),PCM復(fù)用設(shè)備,PDH光端機(jī),E1倒換設(shè)備,串口光端機(jī),SFP光模塊等。聯(lián)系電話:400-8866-640 020-82319301 82319302,質(zhì)量第一,價格優(yōu)惠。




    【本文標(biāo)簽】:光端機(jī) PDH光端機(jī) 工業(yè)交換機(jī)
    【責(zé)任編輯】:光橋版權(quán)所有:轉(zhuǎn)載請注明出處
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