Maximum Acceptable Limit for the Duration of Interruption of Telegraph Channels Arising from Failure of the Normal Power Supplies - Telegraph Transmission (Study Group IX) 1 pp
国外标准现行
标准号:ITU-T R.81-1989
标准名称: 正常电源发生故障造成电报通路中断时可容许的最长中断时间限值
英文名称:Maximum Acceptable Limit for the Duration of Interruption of Telegraph Channels Arising from Failure of the Normal Power Supplies - Telegraph Transmission (Study Group IX) 1 pp