The sdh ( synchronous digital hierarchy ) is originally developed from the pdh ( plesiochronous digital hierarchy ) 它是目前光纖通信系統(tǒng)中應(yīng)用最廣泛的數(shù)字傳輸體制。
Sdh ( synchronous digital hierarchy ) has some primary advantages such as synchronous multiplexing , standard optical interface and strong network management compared with pdh ( plesiochronous digital hierarchy ) 同步數(shù)字體制( sdh )與傳統(tǒng)的偽同步數(shù)字體制( pdh )相比,有三大核心優(yōu)勢,即同步復(fù)用、標(biāo)準(zhǔn)光接口和強(qiáng)大的網(wǎng)管能力。
How to transmit high volume data effectively and economically on current sdh ( synchronous digital hierarchy ) transmission network is an important research area in transmission technology . this paper first introduces the background of eos 如何利用現(xiàn)有的sdh ( synchronousdigitalhierarchy )網(wǎng)絡(luò)高效而經(jīng)濟(jì)地傳輸數(shù)據(jù)業(yè)務(wù),目前正成為傳輸技術(shù)中重要的研究課題。