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題 名 | 用戶迴路測試中繼器(LTT)介面電路的改善措施=The Reliable Improvement for Using LTT |
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作 者 | 林亨禮; 許能舉; 江啟和; 謝旻宏; 黃錦珍; 劉戌蒼; | 書刊名 | 電信研究 |
卷 期 | 32:3 2002.06[民91.06] |
頁 次 | 頁285-301 |
分類號 | 448.76 |
關鍵詞 | 用戶迴路測試中繼器; 測試臺; LTT; LTF; SMAS; V5.1; SS7; |
語 文 | 中文(Chinese) |
中文摘要 | 用戶迴路測試中繼器(Line Test Trunk, LTT)主要係提供用戶迴路測試設備與交換機間的通信介面。從早期測量臺使用的測試臺(Line Test Frame, LTF)到最近全區剛完成建設的用戶迴路自動維修系統(Subscriber-loop Maintenance of Automatic System, SMAS)皆使用LTT做為與交換機間的通信介面。而交換機方面,則為遷就早期LTF的使用,從縱橫制交換機開始汰換後,電子式交換機及數位交換機皆仍然保持原有介面架構,以配合現場實際的需求。由於LTT為類比式介面,通信時間長且容易產生各種異常現象,因此導致在實際應用時,顯得效率不佳,影響服務品質。本文將針對現有各型交換機的LTT介面進行研究,並詳細說明測試設備與交換機間的通信流程,最後本文將以112電話障礙申告服務的角度提出改善意見,使得LTT的使用更有效率。 |
英文摘要 | The main purpose of Line Test Trunk (LTT) is to provide a communication interface between a subscriber’s loop test equipment and a switch. The early subscriber’s loop test equipment is Line Test Frame (LTF) and the latest one is Subscriber-loop Maintenance of Automatic System (SMAS). Both LTF and SMAS are still interfaced with switch via LTT. On the other hand, the switch that is improved and evolved from crossbar type, electronic type to digital type also keeps the same interface to the location with subscriber’s loop test equipment. The communication time is quite long and abnormal phenomenon can be happened easily since the LTT is analogous. It is inefficient and poor service quality in line test application. In this article, the LTT of each kind switch is stated and the communication flow between a switch and a subscriber’s loop test equipment is also explained in detail. In the long run, the improvement suggestion that makes the most of use LTT more efficiently is proposed from the viewpoint of 112, Telephone trouble Inquiry Service. |
本系統中英文摘要資訊取自各篇刊載內容。