This paper introduces the automatic protection means of the channel in railway dispatching telephone system.
介绍了铁路调度电话系统通道自动保护的措施。
The channel organization of Yidu conversion station consists of protective and safety control channel, automation channel, dispatching telephone channel.
宜都换流站的通道组织为：保护及安控通道、自动化通道、调度电话通道。
Dispatching telephone system is a special communication system in the act of commanding and dispatching in commercial manufactures and social activities.
电话调度系统是工业生产和业务活动中指挥调度的专用通信系统。
The railway dispatching telephone system may be treated as a ladder network, its transmission characteristics can be precisely analysed and calculated by continuants (one kind of determinants).
铁路调度电话系统可作为一个梯形网络，其传输特性可以利用连续式（行列式的一种）进行准确的分析和计算。
If a document is distributed to an alien place the receiving unit shall send back return receipt for controlled documents and information notice or inform the dispatching unit over telephone in time.
异地发放文件时接收单位应按要求将《受控文件、资料通知单回执》寄回或及时电话通知发文单位。
If a document is distributed to an alien place the receiving unit shall send back return receipt for controlled documents and information notice or inform the dispatching unit over telephone in time.
异地发放文件时接收单位应按要求将《受控文件、资料通知单回执》寄回或及时电话通知发文单位。
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