plesiochronous digital hierarchy 中文意思是什麼
plesiochronous digital hierarchy
解釋
近乎同步數位階層- plesiochronous : 近乎同步
- digital : adj. 1. 手指的;指狀的。2. 數字的,數據的。n. 1. (鋼琴等的)琴鍵。2. 手指。
- hierarchy : n. 1. 僧侶統治集團,僧侶統治。2. 統治集團。3. 等級制度。4. 【宗教】天使團,天使的級別。5. 【動、植】(綱、目、科、屬等的)分類等級。6. 【計算機】分層,層次。
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Before the 1990s, the digital transmission equipment was based on the technical standards of plesiochronous digital hierarchy ( pdh ). in order to connect the switch to pdh transmission equipment, the switch side needs lots of terminal equipment of the primary rate, i. e., 2048 kbits ( 2m ) switching terminal circuits in compliance with itu - t standards ( e. g. s1240 s dtm trunk module and axe10 s etc module ) and ansi - standard - based 1544 kbits ones
在90年代初期以前,數字傳輸設備是建立在pdh ( plesiochronousdigitalhierarchy )技術標準上,為了連接交換機到pdh傳輸設備上,在交換機側需要大量的符合基群速率的終端設備,即符合itu - t標準的2048kbits ( 2m )交換終端電路(如s1240的dtm中繼模塊, axe10的etc模塊)和符合ansi標準的1544kbits交換終端電路等。 -
Pdh plesiochronous digital hierarchy
準同步數字體系 -
Pdh : plesiochronous digital hierarchy
準同步數字系列 -
Plesiochronous digital hierarchy
準同步數字架構 -
Training - based simulation model and algorithm of plesiochronous digital hierarchy fiber communication system
基於訓練的準同步數字系列光纖通信系統模擬模型與演算法 -
The sdh ( synchronous digital hierarchy ) is originally developed from the pdh ( plesiochronous digital hierarchy )
它是目前光纖通信系統中應用最廣泛的數字傳輸體制。 -
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 )
同步數字體制( sdh )與傳統的偽同步數字體制( pdh )相比,有三大核心優勢,即同步復用、標準光介面和強大的網管能力。
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