对称电缆60路载波系统进网特性要求
General characteristics complying with the network performance objectives for 60 channel carrier telephone systems on symmetric cable pairs
标准状态
发布于：1987-03-26
实施于：1987-11-01
已废止
基本信息
内容预览
General characteristics complying with the network performance objectives for 60 channel carrier telephone systems on symmetric cable pairs