starting-dialing signal

However,during the acceptance of a new substation automation system,the fiber channel can be replaced with the dial-up channel of global system of mobile communication(GSM) to save time provided the fiber channel fails to be put into operation in time.

在数据采集与监控(SCADA)系统中,主站端与变电站端的通信一般采用光纤信道,但在新建变电站的自动化项目验收工作中,在光纤信道未能及时投运的情况下,为节省验收时间,可用全球移动通信系统(GSM)拨号信道代替光纤信道。