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数字蜂窝电信系统(第2段).网络函数的安全性(GSM 03.20)
Digital cellular telecommunications system (phase 2). Security related network functions (GSM 03.20).
参考页数：47P.;A4
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蜂窝式数字电信系统(第2段).向/来自公共数据网(PDN)呼叫的路由选择(GSM 03.70)
Digital cellular telecommunications system (Phase 2). Routeing of calls to/from Public Data Networks (PDN) (GSM 03.70).
参考页数：17P.;A4
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蜂窝式数字电信系统(第2段).第一层.一般要求(GSM 04.04)
Digital cellular telecommunications system (Phase 2). Layer 1. General requirements (GSM 04.04).
参考页数：17P.;A4
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综合业务数字网络(ISDN).连接线路识别显示的补充服务.服务说明 (EN ETS 300094)
Integrated Services Digital Network (ISDN). Connected line identification presentation (COLP) supplementary service. Service description.
参考页数：16P.;A4
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综合服务数字网络(ISDN).3.1kHz电话长途业务.手持送受话器终端的附件要求
Integrated Services Digital Network (ISDN). 3,1 kHz telephony teleservice. Attachment requirements for handset terminals.
参考页数：55P.;A4
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蜂窝式数字电信系统(第2段).数据链路层.一般特性(GSM 04.05)
Digital cellular telecommunications system (Phase 2). Data Link (DL) layer. General aspects (GSM 04.05).
参考页数：21P.;A4
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综合业务数字网络(ISDN).呼叫保持补充服务.服务说明 (EN ETS 300139)
Integrated Services Digital Network (ISDN). Call hold (hold) supplementary service. Service description.
参考页数：15P.;A4
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综合业务数字网络(ISDN).连接线路识别限制补充服务. 服务说明(ETS 300095)
Integrated Services Digital Network (ISDN). Connected line identification restriction (colr) supplementary service. Service description.
参考页数：14P.;A4
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综合业务数字网络(ISDN).补充服务中的直接拔号.服务说明 (ETS 300062)
Integrated Services Digital Network (ISDN). Direct dialling in (ddi) supplementary service. Service description.
参考页数：13P.;A4
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综合业务数字网络(ISDN).终端便携性补充服务.服务说明(EN ETS 300050)
Integrated Services Digital Network (ISDN). Terminal portability (tp) supplementary service. Service description.
参考页数：13P.;A4
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