ETSI TR 101 973-3-2003 接入和终端(AT).公共交换电话网.宽带IP设备支持的遗留终端.最相关的特性和功能列表.第3部分:ISDN终端(版本1.1.1)
Access and Terminals (AT); Public Switched Telephone Network; Support of legacy terminals by BroadBand IP equipment; Listing of the most relevant features and functionalities; Part 3: ISDN terminals (V1.1.1)