本全球技术规范的范围是阐明如何在第2阶段移动台和第1阶段基础设施之间实现互通。目标是在不改变第1阶段规范的统一集的情况下实现这一点。本技术报告规定了对第一阶段基础设施的必要修改，以便为第二阶段的移动台提供可接受的服务，确保第二阶段的移动台获得所有第一阶段的服务。本报告概述了与第1阶段实施有关的必要变更以及必要的控制和澄清，在第2阶段移动设备提供服务之前，应对第1阶段基础设施中的不同接口进行这些变更和澄清。

The Scope of this GTS is to clarify how interworking can be obtained between phase 2 mobile stations and phase 1 infrastructure. The objective is to obtain this without changing the consolidated set of phase 1 specifications. This Technical Report specifies the necessary amendments to the phase 1 infrastructure so that an acceptable service is offered to mobile stations of phase 2, guaranteeing that a phase 2 mobile station obtains all phase 1 services. This report outlines the necessary changes as well as the necessary controls and clarifications with regard to phase 1 implementation, which should be performed to the different interfaces in phase 1 infrastructure before phase 2 mobiles are offered service.