tone channel meaning in English

音道
音调频道

Those communication methods used have advantages and disadvantages in those aspects , such as communication quality , adaptation condition , covering scope , geography environment , construction and working cost , real time quality , etc . in order to make the transport of hydrological information better , this dissertation introduced gsm communication methods in the hydrology telemetric system , using gprs cell - phone , by those mobile communication methods , such as gsm sms , gprs sms , gprs data service , circuit data service , tone channel , etc . this dissertation summarized the constitute of hydrology telemetric system , mobile communication methods , and compared them with those traditional methods
现有的水情遥测通信方式有多种类型，它们在通信质量、适应条件、覆盖范围、地理环境、建设成本及运行费用、实时性等方面各有优缺点。为了更好地进行水情信息传输，本文提出一种基于gsm通信方式的水情遥测系统，通过使用gprs蜂窝电话，采用gsm短消息、 gprs短消息、 gprs数据业务、电路型数据业务和语音通道等多种移动通信方式，为水情数据的传输提供了新的解决途径。