pcm exchange 中文意思是什麼

pcm exchange 解釋
脈碼燈電話交換局
  • pcm : 北美的
  • exchange : vt 1 （以某物與另一物）交換，調換 （for） 2 互換，交流，交易。3 兌換。 vi 1 兌換 （for） 2 交換；...
  1. This paper designs a network interface for digital stored - program - control exchange. this interface connects digital stored - program - control exchange from pcm, and connects ethernet from rj45

    該網路介面系統一端通過pcm基群串列總線連接數字程式控制交換機，另一端經rj45口與以太網相連。
  2. Using an 8 - depth async fifo solves the synchronization and exchange of data be - tween different clock domains. the data transaction protocol comes from the most basic work way of uart. when the master clock is 16. 7mhz, the pcm side and adpcm side clocks both are 2. 38mhz, the results of simulation show that the latency from the start - bit of pcm data inputting uart receiver to the stop - bit of adpcm data outputted uart transmitter is 14. 3 us and the latency from the start - bit of adpcm data inputting uart receiver to the stop - bit of pcm data outputted uart transmitter is 14. 7 us

    在主時鐘為16 . 7mhz ， pcm數據端與adpcm數據端時鐘均為2 . 38mhz時，模擬結果表明從pcm的起始位輸入uart接收器到adpcm終止位輸出uart發送器的最大延遲為14 . 3 s ，從adpcm的起始位輸入uart的接收器到pcm終止位輸出uart發送器的最大延遲為14 . 7 s ，設計時盡可能的使編碼與解碼的時間相差不多，從結果看出基本達到這個要求。
  3. The difficulties of the text are the use of the integrated dtmf receiver mt8870 and the signal generator circuit. their realities need occupy the pcm timeslots. they are the characters of the digital program controlled exchange

    尤其對于收號器mt8870的使用、信號音的產生電路是本設計的難點，具有數字程式控制交換的特點，需要佔用pcm時隙來完成其功能。
  4. All these changes took place after the first spc exchange was put into service in the capital in 1984, enabling the use of pcm circuits for local trunks

    這是從1984年北京開通第一個程式控制交換局，首次在市內中繼使用pcm數字電路之後巨大的變化。
  5. It has the function of conference calling, manual exchange and pcm exchange etc. based on the brief analysis of working state of the pbx, we set up a frame model of the software, and the main arithmetic which make up of this model are given

    本文首先介紹了各部分的硬體實現，在控制軟體的設計中通過建立合理的軟體模型來解決系統的實時性和並發性的問題，最後給出了此類軟體的cad系統設計的方法。
  6. Then the text describes the principle of the pivotal technique - pulse code modulation ( pcm ) in detail which realizes the conversion of the exchange from simulation to digital

    然後詳細介紹了實現交換機由模擬向數字轉變的關鍵技術? ?脈沖編碼調制（ pcm ）技術的原理。
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