DIN EN 50136-2-3-2000 警报系统.警报传输系统和设备.第2-3部分:使用公共交换电话网络带数字通信器的系统中使用的设备的要求
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; German version EN 50136-2-3:1998