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[TZ 010-1988] 大、中、小城市數、?；旌想娦啪W技術體[廢止]
發布時間：1988-01-01
實施時間：2003-05-01
主題內容：規定了電話自動交換網中引入數字設備后的相關要求。適用范圍：主要用于本地網，但又能與長途網相..
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[GB 7437-1987] 公用模擬長途電話自動交換網傳輸性能指標[已作廢]
發布時間：1987-03-16
實施時間：1987-11-01
本標準是公用模擬長途電話自動交換網的傳輸性能指標。它規定了在全國范圍內任何兩個本地端局用戶之間的最低..
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[GB 7283-1987] 城市公共交通通信系統GB7283-87[已作廢]
發布時間：1987-01-26
實施時間：1987-11-01
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