ATIS 0300211.2018现行
信息交换．国家安全应急准备 ( NS /EP) 及电讯服务优先权( TSP) 的结构和编码表示法．北美长途通讯系统代码 Information Interchange - Structure and Coded Representation of National Security and Emergency Preparedness (NS/EP) Telecommunications Service Priority (TSP) Codes for the North American Telecommunications System
出版：Alliance for Telecommunications Industry Solutions
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