查詢結果分析
來源資料
頁籤選單縮合
題 名 | ISDN功能測試系統之硬體設計 |
---|---|
作 者 | 張永康; | 書刊名 | 電信研究 |
卷 期 | 22:4 1992.09[民81.09] |
頁 次 | 頁423-428 |
分類號 | 448.75 |
關鍵詞 | 功能; 系統; 設計; 測試; 硬體; |
語 文 | 中文(Chinese) |
中文摘要 | 為了評估ISDN交換機之性能是否符合CCITT規範,也為了驗證INDS終端機的與交換機間的通信規約是否合手標準,本所交換研究室乃 發展了ISDN功能測試系統(ISDN Performance Evaluation System,簡稱ISDN-PES),可作為ISDN交換機驗收測試的依據,也能驗證ISDN的新服務。系統含資料分析設備(DAE: Data Analysis Equipment)及資料收集設備(DCE: Data Collection Equipment)兩部份。DAE即個人電腦(PC)只需發展應用軟體,以RS~232介面和DCE相連,一方面傳送執行命令給DCE,一方面接收DCE送來之訊息加以分析。DCE則是本系統的重心,用來接入ISDN的S介面,主要是擷取用戶與網路間的D通道控制訊息,加上時戳後送往DAE分析整理,據此評估ISDN交機與用戶終端機之間的控制訊息與時限是否合乎規範。本文的目的在詳述DCE的硬體設計,包括如何擷取D通道訊息、如何將其傳送給DAE等。為了確保系統穩定,並設計一監測電路,希望在不正常的情況下,能自行重新啟動並告警。 |
英文摘要 | In order to perform acceptance test during installaing ISDN switch or for new ISDN products, we developed an ISDN Performance Evaluation System (ISDN-PES). The systems is able to measure the performance of the ISDN switching as well as the Customer Premises Equipment (CPE) through collecting and analyzing the control messages between TE and NT at S interface. The system includes Data Analysis Equipment (DAE) and Data Collecting Equipment (DCE). We use PC for DAE and Just develop application software. There is a RS-232C interface between DAE and DCE, which is used by DAE for sending commands to DCE and by DCE for transferring messages to DAE. DCE is the heart of ISDN-PES, which is used to attach to the S interfnce of ISDN and collect the D channel messages between TE (user) and NT (network). All the D channel messages will be sent to DAE later and analyzed by DAE. We are able to use the result reported by DAE to evaluate the network performance. The hardware architecture of the DCE will be described in the article, which includes the way for collecting D channel messages and sending them to DAE. A watch dog is designed to supervise the whole system as well. |
本系統中英文摘要資訊取自各篇刊載內容。