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介绍了对ＮＥＡＸ６１Ｅ程控电话交换机Ｎｏ．７信令网功能级的兼容性测试，如对数据链路功能级、信号链路功能级和信号网功能级的兼容性测试等。
Introduced the NEAX61E program-controlled telephone exchange No. 7 signaling network functional level of compatibility testing, such as data link functional level, signal link functional level and signal network functional level compatibility testing.