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ＩＴＵ－Ｔ（原ＣＣＩＴＴ）Ｎｏ．７信号方式是以综合业务数字网为目标设计的，可以满足国际国内通信网的各种应用（数字电话网、移动电话网以及智能网等）。本文介绍了广东省邮电科学研究所依据我国制订的国内电话网比Ｎｏ．７信号方式技术规范，研制的国内电话网Ｎｏ．７信号监测系统的主要功能。并就系统的性能、软件设计方法等作了较详细的描述。该监测系统适用于国际网规范和国内网１９８６年规范及１９９０年规范。
ITU-T (former CCITT) No. 7 signal mode is based on integrated services digital network designed to meet the international and domestic communications network for various applications (digital telephone network, mobile phone network and intelligent network, etc.). This article describes the Guangdong Provincial Posts and Telecommunications Institute of Science based on China’s domestic telephone network than No. 7 signal method specifications, the development of the domestic telephone network No. 7 signal monitoring system’s main function. And the system performance, software design methods made a more detailed description. The monitoring system applies to the International Network Code and the 1986 domestic network specifications and 1990 specifications.