EN 50136-2-3:1998 报警系统 报警传输系统和设备 第 2-3 部分:使用公共交换电话网络的带有数字通信器的系统中使用的设备要求
Alarm Systems - Alarm Transmission Systems and Equipment - Part 2-3: Requirements for Equipment Used in Systems with Digital Communicators Using the Public Switched Telephone Network