本欧洲电信标准（ETS）规定了移动台信令方面的可测量性能要求。为了实现灵活性，选择了指定整个移动站的要求，而不是指定每个OSI层的要求。因此，性能要求不适合TS GSM 04.08（仅限第3层）或TS GSM 04.06（仅限第2层）等规范。本ETS的主要目的是为测试其他GSM规范中未包含的要求提供理由。如果特定要求包含在其他GSM规范中，此处不重复。 移动台必须执行各种各样的功能。因此，大多数性能测量必须在一组定义的条件下进行:必要时，这些条件包括在本ETS中。必要时，对移动设备和SIM卡之间的交互时间进行某些假设。如果（测试）SIM卡在假定时间内没有响应，则应提供适当的余量。此外，本ETS应包含足够的要求，以便能够计算TS GSM 04.08中一些未定义的网络计时器。

This European Telecommunication Standard (ETS) specifies measurable performance requirements for signalling aspects of mobile stations. To allow implementation flexibility it has been chosen to specify requirements on the whole mobile station rather than to specify requirements on each OSI layer. As a consequence the performance requirements do not fit conveniently in specifications such as TS GSM 04.08 (layer 3 only) or TS GSM 04.06 (layer 2 only). The main aim of this ETS is to provide the justification for testing of requirements that are not included in other GSM specifications. Where specific requirements are included in other GSM specifications they are not duplicated here. Mobile Stations have to perform a wide variety of functions. As a consequence most performance measurements have to be made under a set of defined conditions: where necessary, these are included in this ETS. Where necessary certain assumptions are made about the interaction times between the mobile equipment and the SIM. If the (test) SIM does not respond within the assumed time then appropriate allowances shall be made. Additionally, it is intended that this ETS should contain sufficient requirements to enable some undefined network timers in TS GSM 04.08 to be calculated.