digital spc exchange 中文意思是什麼
digital spc exchange
解釋
數字程式控制交換機-
As the spc exchange develops, in the digital transmission network the basic unit of 64 kbits as a circuit has gradually been replaced by that of 30 2 mbits circuits ( hereinafter referred to as e1 )
數字傳輸網隨著程式控制交換機的發展,逐漸改變了由64kbits速率為一條電路的基本計算單位,接受了2mbits (下稱e1 ) 30條電路為一個基本單位的概念。
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