DIN EN 301437:2000 终端设备(TE).泛欧认可的连接到可用双音多频(DTMF)信令(如果提供),进行网络寻址的、支持语音电话服务的TE的模拟公用电话交换网(PSTNS)相连接的安装要求
Terminal Equipment (TE) - Attachment requirements for pan-European approval for connection to the analogue Public Switched Telephone Networks (PSTNs) of TE supporting the voice telephony service in wich network addressing, if provided, is by means of Dual