The types of non-voice signals considered include voiceband data, network signalling, circuit continuity tones, and dual-tone multi-frequency signalling. 考虑的非话音信号的类型包括:话带数据、网络信令、电路连接单音以及多音多频信令。
The status quo of technique used for the transmission of remote trip signals ard introduced. Based upon this, a principle scheme of new type dual-tone multi-frequency transmission interface device for remote trip signals is put forward. 介绍了目前传输远方跳闸信号的使用技术和现状,并在此基础上提出了一种新型的双音多频(DTMF)式远方跳闸信号传输接口装置的原理方案。