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    對(duì)于一個(gè)鐵路工程項(xiàng)目來(lái)說(shuō),通信系統(tǒng)對(duì)整個(gè)工程起著至關(guān)重要的作用。接入網(wǎng)技術(shù)是鐵路通信系統(tǒng)中一項(xiàng)關(guān)鍵技術(shù),因?yàn)榻尤刖W(wǎng)建設(shè)的好壞,直接關(guān)系到對(duì)用戶(hù)提供業(yè)務(wù)服務(wù)的優(yōu)劣,而影響整個(gè)鐵路通信網(wǎng)的信譽(yù)及發(fā)展。一、接入網(wǎng)技術(shù) 接入網(wǎng)是由用戶(hù)-網(wǎng)絡(luò)接口(UNI)到業(yè)務(wù)節(jié)點(diǎn)接…
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