电话自动交换网用户信号方式,本标准规定我国电话自动交换网用户话机和交换机之间的信号及相关技术指标 本标准主要适

于纵横制 或准电子式 交换局 并包括步进制局部分主要技术指标-Automatic telephone exchange signaling network users, the standard signal and related technical indicators of the standard automatic telephone exchange network users switch between the phone and the main suitable crossbar or quasi-electronic exchange bureau and includes some of the major technological step system index