JTGF80/2-2004中,数字程控交换系统工作电压的规定值应为()。
2023-08-22
A.40V
B.-57~40V
C.57V
D.-57~-40V
参考答案:D
B.-57~40V
C.57V
D.-57~-40V
参考答案:D
实测项目及检测方法见表3-9-1数字程控交换系统实测目录表中检查项目1、△工作电压的规定值为-57~-40V,检查方法:用万用表实测
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