ETSI PRETS 300 834-1998 终端设备(TE).窄带网络(PSTN或ISDN).无数据设备的交互式视音频检索业务的接入.将ISDN或PSTN可视电话终端接入到视听数据库
Terminal Equipment (TE); Narrowband Networks (PSTN or ISDN); Access to Interactive Audio-Visual Retrieval Services without Data-Facility; Access for ISDN or PSTN Videophony Terminals to Audio-Visual Databases