环路载波与某些程控交换机联接时出现的一个问题新余市高等专科学校彭才辉在本地网建设中，为了把远端零散用户纳入本地网，往往使用环路载波设备。环路载波机与某些型号程控交换机联接时，出现市话用户呼叫环路载波用户，局端载波机铃流检测电路不能正常检测到铃流信号，... Loop carrier and some program-controlled switches connected to a problem Xinyu City College Pengcai Hui in the local network construction, in order to incorporate remote users into the local network scattered, often using the loop carrier device. When the loop carrier is connected with some type of program-controlled switches, the user of the local loop calls the user of the loop carrier, and the ring carrier detection circuit of the carrier side of the local carrier can not normally detect the ringing signal, ...