switched digital data service 中文意思是什麼
switched digital data service
解釋
數字數據交換業務-
Firstly bidirectional remote digital data was transferred on the public switched telephone network ( pstn ) using its fax mode in the remote diagnostic system, and then the hardware of client terminal device and server device, the control software and diagnostic software of service center were designed
提出了使用公用電話網將終端車輛與服務中心相連接,運用傳真通訊模式實現數字信號雙向傳輸,並設計開發了由用戶終端數據處理裝置和服務器端數據處理裝置組成的硬體系統,以及相應的控制軟體和服務中心診斷軟體。
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