本标准规定了ITU-T建议G.991.2单对高速数字用户线（SHDSL）收发器作为规范性参考，并确定了ITU-T G.991.2中与北美不同的要求。本标准规定了提供高达5696 kbit/s对称有效负载数据速率的传输系统的要求。

This standard specifies ITU-T Recommendation G.991.2, Single-Pair High-Speed Digital Subscriber Line (SHDSL) Transceivers as a normative reference and identifies the requirements in ITU-T G.991.2 that are different in North America. This standard specifies the requirements for a transmission system providing symmetric payload data rates up to 5696 kbit/s.