ITU-T M.500-1988
在受管制的线路部分的日常维护测量.一般的维修原则.维护国际传输系统和电话线路.研究组4

Routine Maintenance Measurements to Be Made on Regulated Line Sections - General Maintenance Principles - Maintenance of International Transmission Systems and Telephone Circuits


 

 

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标准号
ITU-T M.500-1988
发布日期
1988年
实施日期
废止日期
中国标准分类号
L24
发布单位
IX-ITU
适用范围
When the measurement mentioned in Q 1.2.1 above gives unacceptably high noise values,or more often,when the reliability of the system makes it desirable,check of the following measurements in accordance with the appropriate CCIR Recommendations for the radio-relay system concerned should be made,the radio-frequency channel being switched to the standby equipment, and the measurement results compared with the results of the reference measurements required by Recommendation M.450,83

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