本欧洲电信标准（ETS）规定了无线电接口（GSM 04.02中定义的参考点Um）正常运行和调用多方补充服务时使用的程序。GSM 04.10中给出了第3层无线电接口补充业务规范的一般方面。GSM 04.80规定了补充服务的格式和编码。补充业务的定义和说明见GS M 02.04和GSM 02.8x和02.9x系列。GSM 02。 84特别涉及多方补充服务。GSM 03.11和GSM 03.8x和03.9x系列中描述了补充业务的技术实现。GSM 03.84专门涉及多方补充业务。第3层无线电接口的呼叫控制、移动性管理和无线电资源管理程序在GSM 04.07和GSM 04.08中定义。以下补充服务属于多方补充服务，并在本ETS中进行了描述:-多方服务（MPTY） （第1条）。

This European Telecommunication Standard (ETS) specifies the procedure s used at the radio interface (Reference point Um as defined in GSM 04.02) for normal operation and invocation of MultiParty supplementary s ervices. In GSM 04.10 the general aspects of the specification of supplementary services at the layer 3 radio interface are given. GSM 04.80 specifies the formats and coding for the supplementary servi ces. Definitions and descriptions of supplementary services are given in GS M 02.04 and the GSM 02.8x and 02.9x-series. GSM 02.84 is related specially to MultiParty supplementary services. Technical realization of supplementary services is described in GSM 03.11 and the GSM 03.8x and 03.9x-series. GSM 03.84 is related specially to MultiParty supplementary services. The procedures for Call Control, Mobility Management and Radio Resourc e management at the layer 3 radio interface are defined in GSM 04.07 a nd GSM 04.08. The following supplementary service belongs to the MultiParty suppleme ntary services and is described in this ETS: - MultiParty service (MPTY) (clause 1).