ETSI EG 201 730-2-2006 公共通信网的终端接入.导则1999/5/EC(R&TTE)中条款4.2的应用.接口规范发布指南.第2部分:模拟窄带线路接口(版本2.1.1)
Terminals' access to Public Telecommunications Networks; Application of the Directive 1999/5/EC (R&TTE), article 4.2; Guidelines for the publication of interface specifications; Part 2: Analogue narrow-band wireline interfaces